Merge branch 'akpm-incoming-1'

* akpm-incoming-1: (176 commits)
  scripts/checkpatch.pl: add check for declaration of pci_device_id
  scripts/checkpatch.pl: add warnings for static char that could be static const char
  checkpatch: version 0.31
  checkpatch: statement/block context analyser should look at sanitised lines
  checkpatch: handle EXPORT_SYMBOL for DEVICE_ATTR and similar
  checkpatch: clean up structure definition macro handline
  checkpatch: update copyright dates
  checkpatch: Add additional attribute #defines
  checkpatch: check for incorrect permissions
  checkpatch: ensure kconfig help checks only apply when we are adding help
  checkpatch: simplify and consolidate "missing space after" checks
  checkpatch: add check for space after struct, union, and enum
  checkpatch: returning errno typically should be negative
  checkpatch: handle casts better fixing false categorisation of : as binary
  checkpatch: ensure we do not collapse bracketed sections into constants
  checkpatch: suggest cleanpatch and cleanfile when appropriate
  checkpatch: types may sit on a line on their own
  checkpatch: fix regressions in "fix handling of leading spaces"
  div64_u64(): improve precision on 32bit platforms
  lib/parser: cleanup match_number()
  ...

209 files changed, 7228 insertions, 1699 deletions

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index a6aca8740883..a563b74c7aef 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -374,13 +374,13 @@ Swap:                  0 kB
 KernelPageSize:        4 kB
 MMUPageSize:           4 kB
 
-The first  of these lines shows  the same information  as is displayed for the
-mapping in /proc/PID/maps.  The remaining lines show  the size of the mapping,
-the amount of the mapping that is currently resident in RAM, the "proportional
-set size” (divide each shared page by the number of processes sharing it), the
-number of clean and dirty shared pages in the mapping, and the number of clean
-and dirty private pages in the mapping.  The "Referenced" indicates the amount
-of memory currently marked as referenced or accessed.
+The first of these lines shows the same information as is displayed for the
+mapping in /proc/PID/maps.  The remaining lines show the size of the mapping
+(size), the amount of the mapping that is currently resident in RAM (RSS), the
+process' proportional share of this mapping (PSS), the number of clean and
+dirty shared pages in the mapping, and the number of clean and dirty private
+pages in the mapping.  The "Referenced" indicates the amount of memory
+currently marked as referenced or accessed.
 
 This file is only present if the CONFIG_MMU kernel configuration option is
 enabled.
diff --git a/Documentation/misc-devices/apds990x.txt b/Documentation/misc-devices/apds990x.txt
new file mode 100644
index 000000000000..d5408cade32f
--- /dev/null
+++ b/Documentation/misc-devices/apds990x.txt
@@ -0,0 +1,111 @@
+Kernel driver apds990x
+======================
+
+Supported chips:
+Avago APDS990X
+
+Data sheet:
+Not freely available
+
+Author:
+Samu Onkalo <samu.p.onkalo@nokia.com>
+
+Description
+-----------
+
+APDS990x is a combined ambient light and proximity sensor. ALS and proximity
+functionality are highly connected. ALS measurement path must be running
+while the proximity functionality is enabled.
+
+ALS produces raw measurement values for two channels: Clear channel
+(infrared + visible light) and IR only. However, threshold comparisons happen
+using clear channel only. Lux value and the threshold level on the HW
+might vary quite much depending the spectrum of the light source.
+
+Driver makes necessary conversions to both directions so that user handles
+only lux values. Lux value is calculated using information from the both
+channels. HW threshold level is calculated from the given lux value to match
+with current type of the lightning. Sometimes inaccuracy of the estimations
+lead to false interrupt, but that doesn't harm.
+
+ALS contains 4 different gain steps. Driver automatically
+selects suitable gain step. After each measurement, reliability of the results
+is estimated and new measurement is trigged if necessary.
+
+Platform data can provide tuned values to the conversion formulas if
+values are known. Otherwise plain sensor default values are used.
+
+Proximity side is little bit simpler. There is no need for complex conversions.
+It produces directly usable values.
+
+Driver controls chip operational state using pm_runtime framework.
+Voltage regulators are controlled based on chip operational state.
+
+SYSFS
+-----
+
+
+chip_id
+        RO - shows detected chip type and version
+
+power_state
+        RW - enable / disable chip. Uses counting logic
+             1 enables the chip
+             0 disables the chip
+lux0_input
+        RO - measured lux value
+             sysfs_notify called when threshold interrupt occurs
+
+lux0_sensor_range
+        RO - lux0_input max value. Actually never reaches since sensor tends
+             to saturate much before that. Real max value varies depending
+             on the light spectrum etc.
+
+lux0_rate
+        RW - measurement rate in Hz
+
+lux0_rate_avail
+        RO - supported measurement rates
+
+lux0_calibscale
+        RW - calibration value. Set to neutral value by default.
+             Output results are multiplied with calibscale / calibscale_default
+             value.
+
+lux0_calibscale_default
+        RO - neutral calibration value
+
+lux0_thresh_above_value
+        RW - HI level threshold value. All results above the value
+             trigs an interrupt. 65535 (i.e. sensor_range) disables the above
+             interrupt.
+
+lux0_thresh_below_value
+        RW - LO level threshold value. All results below the value
+             trigs an interrupt. 0 disables the below interrupt.
+
+prox0_raw
+        RO - measured proximity value
+             sysfs_notify called when threshold interrupt occurs
+
+prox0_sensor_range
+        RO - prox0_raw max value (1023)
+
+prox0_raw_en
+        RW - enable / disable proximity - uses counting logic
+             1 enables the proximity
+             0 disables the proximity
+
+prox0_reporting_mode
+        RW - trigger / periodic. In "trigger" mode the driver tells two possible
+             values: 0 or prox0_sensor_range value. 0 means no proximity,
+             1023 means proximity. This causes minimal number of interrupts.
+             In "periodic" mode the driver reports all values above
+             prox0_thresh_above. This causes more interrupts, but it can give
+             _rough_ estimate about the distance.
+
+prox0_reporting_mode_avail
+        RO - accepted values to prox0_reporting_mode (trigger, periodic)
+
+prox0_thresh_above_value
+        RW - threshold level which trigs proximity events.
diff --git a/Documentation/misc-devices/bh1770glc.txt b/Documentation/misc-devices/bh1770glc.txt
new file mode 100644
index 000000000000..7d64c014dc70
--- /dev/null
+++ b/Documentation/misc-devices/bh1770glc.txt
@@ -0,0 +1,116 @@
+Kernel driver bh1770glc
+=======================
+
+Supported chips:
+ROHM BH1770GLC
+OSRAM SFH7770
+
+Data sheet:
+Not freely available
+
+Author:
+Samu Onkalo <samu.p.onkalo@nokia.com>
+
+Description
+-----------
+BH1770GLC and SFH7770 are combined ambient light and proximity sensors.
+ALS and proximity parts operates on their own, but they shares common I2C
+interface and interrupt logic. In principle they can run on their own,
+but ALS side results are used to estimate reliability of the proximity sensor.
+
+ALS produces 16 bit lux values. The chip contains interrupt logic to produce
+low and high threshold interrupts.
+
+Proximity part contains IR-led driver up to 3 IR leds. The chip measures
+amount of reflected IR light and produces proximity result. Resolution is
+8 bit. Driver supports only one channel. Driver uses ALS results to estimate
+reliability of the proximity results. Thus ALS is always running while
+proximity detection is needed.
+
+Driver uses threshold interrupts to avoid need for polling the values.
+Proximity low interrupt doesn't exists in the chip. This is simulated
+by using a delayed work. As long as there is proximity threshold above
+interrupts the delayed work is pushed forward. So, when proximity level goes
+below the threshold value, there is no interrupt and the delayed work will
+finally run. This is handled as no proximity indication.
+
+Chip state is controlled via runtime pm framework when enabled in config.
+
+Calibscale factor is used to hide differences between the chips. By default
+value set to neutral state meaning factor of 1.00. To get proper values,
+calibrated source of light is needed as a reference. Calibscale factor is set
+so that measurement produces about the expected lux value.
+
+SYSFS
+-----
+
+chip_id
+        RO - shows detected chip type and version
+
+power_state
+        RW - enable / disable chip. Uses counting logic
+             1 enables the chip
+             0 disables the chip
+
+lux0_input
+        RO - measured lux value
+             sysfs_notify called when threshold interrupt occurs
+
+lux0_sensor_range
+        RO - lux0_input max value
+
+lux0_rate
+        RW - measurement rate in Hz
+
+lux0_rate_avail
+        RO - supported measurement rates
+
+lux0_thresh_above_value
+        RW - HI level threshold value. All results above the value
+             trigs an interrupt. 65535 (i.e. sensor_range) disables the above
+             interrupt.
+
+lux0_thresh_below_value
+        RW - LO level threshold value. All results below the value
+             trigs an interrupt. 0 disables the below interrupt.
+
+lux0_calibscale
+        RW - calibration value. Set to neutral value by default.
+             Output results are multiplied with calibscale / calibscale_default
+             value.
+
+lux0_calibscale_default
+        RO - neutral calibration value
+
+prox0_raw
+        RO - measured proximity value
+             sysfs_notify called when threshold interrupt occurs
+
+prox0_sensor_range
+        RO - prox0_raw max value
+
+prox0_raw_en
+        RW - enable / disable proximity - uses counting logic
+             1 enables the proximity
+             0 disables the proximity
+
+prox0_thresh_above_count
+        RW - number of proximity interrupts needed before triggering the event
+
+prox0_rate_above
+        RW - Measurement rate (in Hz) when the level is above threshold
+             i.e. when proximity on has been reported.
+
+prox0_rate_below
+        RW - Measurement rate (in Hz) when the level is below threshold
+             i.e. when proximity off has been reported.
+
+prox0_rate_avail
+        RO - Supported proximity measurement rates in Hz
+
+prox0_thresh_above0_value
+        RW - threshold level which trigs proximity events.
+             Filtered by persistence filter (prox0_thresh_above_count)
+
+prox0_thresh_above1_value
+        RW - threshold level which trigs event immediately
diff --git a/Documentation/timers/hpet_example.c b/Documentation/timers/hpet_example.c
index 4bfafb7bc4c5..9a3e7012c190 100644
--- a/Documentation/timers/hpet_example.c
+++ b/Documentation/timers/hpet_example.c
@@ -97,6 +97,33 @@ hpet_open_close(int argc, const char **argv)
 void
 hpet_info(int argc, const char **argv)
 {
+        struct hpet_info        info;
+        int                     fd;
+
+        if (argc != 1) {
+                fprintf(stderr, "hpet_info: device-name\n");
+                return;
+        }
+
+        fd = open(argv[0], O_RDONLY);
+        if (fd < 0) {
+                fprintf(stderr, "hpet_info: open of %s failed\n", argv[0]);
+                return;
+        }
+
+        if (ioctl(fd, HPET_INFO, &info) < 0) {
+                fprintf(stderr, "hpet_info: failed to get info\n");
+                goto out;
+        }
+
+        fprintf(stderr, "hpet_info: hi_irqfreq 0x%lx hi_flags 0x%lx ",
+                info.hi_ireqfreq, info.hi_flags);
+        fprintf(stderr, "hi_hpet %d hi_timer %d\n",
+                info.hi_hpet, info.hi_timer);
+
+out:
+        close(fd);
+        return;
 }
 
 void
diff --git a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
index 1b55146d1c8d..b3e73ddb1567 100644
--- a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
+++ b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
@@ -46,7 +46,7 @@ use constant HIGH_KSWAPD_LATENCY		=> 20;
 use constant HIGH_KSWAPD_REWAKEUP               => 21;
 use constant HIGH_NR_SCANNED                    => 22;
 use constant HIGH_NR_TAKEN                      => 23;
-use constant HIGH_NR_RECLAIM                    => 24;
+use constant HIGH_NR_RECLAIMED                  => 24;
 use constant HIGH_NR_CONTIG_DIRTY               => 25;
 
 my %perprocesspid;
@@ -58,11 +58,13 @@ my $opt_read_procstat;
 my $total_wakeup_kswapd;
 my ($total_direct_reclaim, $total_direct_nr_scanned);
 my ($total_direct_latency, $total_kswapd_latency);
+my ($total_direct_nr_reclaimed);
 my ($total_direct_writepage_file_sync, $total_direct_writepage_file_async);
 my ($total_direct_writepage_anon_sync, $total_direct_writepage_anon_async);
 my ($total_kswapd_nr_scanned, $total_kswapd_wake);
 my ($total_kswapd_writepage_file_sync, $total_kswapd_writepage_file_async);
 my ($total_kswapd_writepage_anon_sync, $total_kswapd_writepage_anon_async);
+my ($total_kswapd_nr_reclaimed);
 
 # Catch sigint and exit on request
 my $sigint_report = 0;
@@ -104,7 +106,7 @@ my $regex_kswapd_wake_default = 'nid=([0-9]*) order=([0-9]*)';
 my $regex_kswapd_sleep_default = 'nid=([0-9]*)';
 my $regex_wakeup_kswapd_default = 'nid=([0-9]*) zid=([0-9]*) order=([0-9]*)';
 my $regex_lru_isolate_default = 'isolate_mode=([0-9]*) order=([0-9]*) nr_requested=([0-9]*) nr_scanned=([0-9]*) nr_taken=([0-9]*) contig_taken=([0-9]*) contig_dirty=([0-9]*) contig_failed=([0-9]*)';
-my $regex_lru_shrink_inactive_default = 'lru=([A-Z_]*) nr_scanned=([0-9]*) nr_reclaimed=([0-9]*) priority=([0-9]*)';
+my $regex_lru_shrink_inactive_default = 'nid=([0-9]*) zid=([0-9]*) nr_scanned=([0-9]*) nr_reclaimed=([0-9]*) priority=([0-9]*) flags=([A-Z_|]*)';
 my $regex_lru_shrink_active_default = 'lru=([A-Z_]*) nr_scanned=([0-9]*) nr_rotated=([0-9]*) priority=([0-9]*)';
 my $regex_writepage_default = 'page=([0-9a-f]*) pfn=([0-9]*) flags=([A-Z_|]*)';
 
@@ -203,8 +205,8 @@ $regex_lru_shrink_inactive = generate_traceevent_regex(
                         "vmscan/mm_vmscan_lru_shrink_inactive",
                         $regex_lru_shrink_inactive_default,
                         "nid", "zid",
-                        "lru",
-                        "nr_scanned", "nr_reclaimed", "priority");
+                        "nr_scanned", "nr_reclaimed", "priority",
+                        "flags");
 $regex_lru_shrink_active = generate_traceevent_regex(
                         "vmscan/mm_vmscan_lru_shrink_active",
                         $regex_lru_shrink_active_default,
@@ -375,6 +377,16 @@ EVENT_PROCESS:
                         my $nr_contig_dirty = $7;
                         $perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned;
                         $perprocesspid{$process_pid}->{HIGH_NR_CONTIG_DIRTY} += $nr_contig_dirty;
+                } elsif ($tracepoint eq "mm_vmscan_lru_shrink_inactive") {
+                        $details = $5;
+                        if ($details !~ /$regex_lru_shrink_inactive/o) {
+                                print "WARNING: Failed to parse mm_vmscan_lru_shrink_inactive as expected\n";
+                                print "         $details\n";
+                                print "         $regex_lru_shrink_inactive/o\n";
+                                next;
+                        }
+                        my $nr_reclaimed = $4;
+                        $perprocesspid{$process_pid}->{HIGH_NR_RECLAIMED} += $nr_reclaimed;
                 } elsif ($tracepoint eq "mm_vmscan_writepage") {
                         $details = $5;
                         if ($details !~ /$regex_writepage/o) {
@@ -464,8 +476,8 @@ sub dump_stats {
 
         # Print out process activity
         printf("\n");
-        printf("%-" . $max_strlen . "s %8s %10s   %8s   %8s %8s %8s %8s\n", "Process", "Direct",  "Wokeup", "Pages",   "Pages",   "Pages",     "Time");
-        printf("%-" . $max_strlen . "s %8s %10s   %8s   %8s %8s %8s %8s\n", "details", "Rclms",   "Kswapd", "Scanned", "Sync-IO", "ASync-IO",  "Stalled");
+        printf("%-" . $max_strlen . "s %8s %10s   %8s %8s  %8s %8s %8s %8s\n", "Process", "Direct",  "Wokeup", "Pages",   "Pages",   "Pages",   "Pages",     "Time");
+        printf("%-" . $max_strlen . "s %8s %10s   %8s %8s  %8s %8s %8s %8s\n", "details", "Rclms",   "Kswapd", "Scanned", "Rclmed",  "Sync-IO", "ASync-IO",  "Stalled");
         foreach $process_pid (keys %stats) {
 
                 if (!$stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN}) {
@@ -475,6 +487,7 @@ sub dump_stats {
                 $total_direct_reclaim += $stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN};
                 $total_wakeup_kswapd += $stats{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD};
                 $total_direct_nr_scanned += $stats{$process_pid}->{HIGH_NR_SCANNED};
+                $total_direct_nr_reclaimed += $stats{$process_pid}->{HIGH_NR_RECLAIMED};
                 $total_direct_writepage_file_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC};
                 $total_direct_writepage_anon_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC};
                 $total_direct_writepage_file_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC};
@@ -489,11 +502,12 @@ sub dump_stats {
                         $index++;
                 }
 
-                printf("%-" . $max_strlen . "s %8d %10d   %8u   %8u %8u %8.3f",
+                printf("%-" . $max_strlen . "s %8d %10d   %8u %8u  %8u %8u %8.3f",
                         $process_pid,
                         $stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN},
                         $stats{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD},
                         $stats{$process_pid}->{HIGH_NR_SCANNED},
+                        $stats{$process_pid}->{HIGH_NR_RECLAIMED},
                         $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC},
                         $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC},
                         $this_reclaim_delay / 1000);
@@ -529,8 +543,8 @@ sub dump_stats {
 
         # Print out kswapd activity
         printf("\n");
-        printf("%-" . $max_strlen . "s %8s %10s   %8s   %8s %8s %8s\n", "Kswapd",   "Kswapd",  "Order",     "Pages",   "Pages",  "Pages");
-        printf("%-" . $max_strlen . "s %8s %10s   %8s   %8s %8s %8s\n", "Instance", "Wakeups", "Re-wakeup", "Scanned", "Sync-IO", "ASync-IO");
+        printf("%-" . $max_strlen . "s %8s %10s   %8s   %8s %8s %8s\n", "Kswapd",   "Kswapd",  "Order",     "Pages",   "Pages",   "Pages",  "Pages");
+        printf("%-" . $max_strlen . "s %8s %10s   %8s   %8s %8s %8s\n", "Instance", "Wakeups", "Re-wakeup", "Scanned", "Rclmed",  "Sync-IO", "ASync-IO");
         foreach $process_pid (keys %stats) {
 
                 if (!$stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE}) {
@@ -539,16 +553,18 @@ sub dump_stats {
 
                 $total_kswapd_wake += $stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE};
                 $total_kswapd_nr_scanned += $stats{$process_pid}->{HIGH_NR_SCANNED};
+                $total_kswapd_nr_reclaimed += $stats{$process_pid}->{HIGH_NR_RECLAIMED};
                 $total_kswapd_writepage_file_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC};
                 $total_kswapd_writepage_anon_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC};
                 $total_kswapd_writepage_file_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC};
                 $total_kswapd_writepage_anon_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC};
 
-                printf("%-" . $max_strlen . "s %8d %10d   %8u   %8i %8u",
+                printf("%-" . $max_strlen . "s %8d %10d   %8u %8u  %8i %8u",
                         $process_pid,
                         $stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE},
                         $stats{$process_pid}->{HIGH_KSWAPD_REWAKEUP},
                         $stats{$process_pid}->{HIGH_NR_SCANNED},
+                        $stats{$process_pid}->{HIGH_NR_RECLAIMED},
                         $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC},
                         $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC});
 
@@ -579,6 +595,7 @@ sub dump_stats {
         print "\nSummary\n";
         print "Direct reclaims:                         $total_direct_reclaim\n";
         print "Direct reclaim pages scanned:            $total_direct_nr_scanned\n";
+        print "Direct reclaim pages reclaimed:          $total_direct_nr_reclaimed\n";
         print "Direct reclaim write file sync I/O:      $total_direct_writepage_file_sync\n";
         print "Direct reclaim write anon sync I/O:      $total_direct_writepage_anon_sync\n";
         print "Direct reclaim write file async I/O:     $total_direct_writepage_file_async\n";
@@ -588,6 +605,7 @@ sub dump_stats {
         print "\n";
         print "Kswapd wakeups:                          $total_kswapd_wake\n";
         print "Kswapd pages scanned:                    $total_kswapd_nr_scanned\n";
+        print "Kswapd pages reclaimed:                  $total_kswapd_nr_reclaimed\n";
         print "Kswapd reclaim write file sync I/O:      $total_kswapd_writepage_file_sync\n";
         print "Kswapd reclaim write anon sync I/O:      $total_kswapd_writepage_anon_sync\n";
         print "Kswapd reclaim write file async I/O:     $total_kswapd_writepage_file_async\n";
@@ -612,6 +630,7 @@ sub aggregate_perprocesspid() {
                 $perprocess{$process}->{MM_VMSCAN_WAKEUP_KSWAPD} += $perprocesspid{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD};
                 $perprocess{$process}->{HIGH_KSWAPD_REWAKEUP} += $perprocesspid{$process_pid}->{HIGH_KSWAPD_REWAKEUP};
                 $perprocess{$process}->{HIGH_NR_SCANNED} += $perprocesspid{$process_pid}->{HIGH_NR_SCANNED};
+                $perprocess{$process}->{HIGH_NR_RECLAIMED} += $perprocesspid{$process_pid}->{HIGH_NR_RECLAIMED};
                 $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC};
                 $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC};
                 $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC};
diff --git a/Documentation/vm/highmem.txt b/Documentation/vm/highmem.txt
new file mode 100644
index 000000000000..4324d24ffacd
--- /dev/null
+++ b/Documentation/vm/highmem.txt
@@ -0,0 +1,162 @@
+
+                             ====================
+                             HIGH MEMORY HANDLING
+                             ====================
+
+By: Peter Zijlstra <a.p.zijlstra@chello.nl>
+
+Contents:
+
+ (*) What is high memory?
+
+ (*) Temporary virtual mappings.
+
+ (*) Using kmap_atomic.
+
+ (*) Cost of temporary mappings.
+
+ (*) i386 PAE.
+
+
+====================
+WHAT IS HIGH MEMORY?
+====================
+
+High memory (highmem) is used when the size of physical memory approaches or
+exceeds the maximum size of virtual memory.  At that point it becomes
+impossible for the kernel to keep all of the available physical memory mapped
+at all times.  This means the kernel needs to start using temporary mappings of
+the pieces of physical memory that it wants to access.
+
+The part of (physical) memory not covered by a permanent mapping is what we
+refer to as 'highmem'.  There are various architecture dependent constraints on
+where exactly that border lies.
+
+In the i386 arch, for example, we choose to map the kernel into every process's
+VM space so that we don't have to pay the full TLB invalidation costs for
+kernel entry/exit.  This means the available virtual memory space (4GiB on
+i386) has to be divided between user and kernel space.
+
+The traditional split for architectures using this approach is 3:1, 3GiB for
+userspace and the top 1GiB for kernel space:
+
+                +--------+ 0xffffffff
+                | Kernel |
+                +--------+ 0xc0000000
+                |        |
+                | User   |
+                |        |
+                +--------+ 0x00000000
+
+This means that the kernel can at most map 1GiB of physical memory at any one
+time, but because we need virtual address space for other things - including
+temporary maps to access the rest of the physical memory - the actual direct
+map will typically be less (usually around ~896MiB).
+
+Other architectures that have mm context tagged TLBs can have separate kernel
+and user maps.  Some hardware (like some ARMs), however, have limited virtual
+space when they use mm context tags.
+
+
+==========================
+TEMPORARY VIRTUAL MAPPINGS
+==========================
+
+The kernel contains several ways of creating temporary mappings:
+
+ (*) vmap().  This can be used to make a long duration mapping of multiple
+     physical pages into a contiguous virtual space.  It needs global
+     synchronization to unmap.
+
+ (*) kmap().  This permits a short duration mapping of a single page.  It needs
+     global synchronization, but is amortized somewhat.  It is also prone to
+     deadlocks when using in a nested fashion, and so it is not recommended for
+     new code.
+
+ (*) kmap_atomic().  This permits a very short duration mapping of a single
+     page.  Since the mapping is restricted to the CPU that issued it, it
+     performs well, but the issuing task is therefore required to stay on that
+     CPU until it has finished, lest some other task displace its mappings.
+
+     kmap_atomic() may also be used by interrupt contexts, since it is does not
+     sleep and the caller may not sleep until after kunmap_atomic() is called.
+
+     It may be assumed that k[un]map_atomic() won't fail.
+
+
+=================
+USING KMAP_ATOMIC
+=================
+
+When and where to use kmap_atomic() is straightforward.  It is used when code
+wants to access the contents of a page that might be allocated from high memory
+(see __GFP_HIGHMEM), for example a page in the pagecache.  The API has two
+functions, and they can be used in a manner similar to the following:
+
+        /* Find the page of interest. */
+        struct page *page = find_get_page(mapping, offset);
+
+        /* Gain access to the contents of that page. */
+        void *vaddr = kmap_atomic(page);
+
+        /* Do something to the contents of that page. */
+        memset(vaddr, 0, PAGE_SIZE);
+
+        /* Unmap that page. */
+        kunmap_atomic(vaddr);
+
+Note that the kunmap_atomic() call takes the result of the kmap_atomic() call
+not the argument.
+
+If you need to map two pages because you want to copy from one page to
+another you need to keep the kmap_atomic calls strictly nested, like:
+
+        vaddr1 = kmap_atomic(page1);
+        vaddr2 = kmap_atomic(page2);
+
+        memcpy(vaddr1, vaddr2, PAGE_SIZE);
+
+        kunmap_atomic(vaddr2);
+        kunmap_atomic(vaddr1);
+
+
+==========================
+COST OF TEMPORARY MAPPINGS
+==========================
+
+The cost of creating temporary mappings can be quite high.  The arch has to
+manipulate the kernel's page tables, the data TLB and/or the MMU's registers.
+
+If CONFIG_HIGHMEM is not set, then the kernel will try and create a mapping
+simply with a bit of arithmetic that will convert the page struct address into
+a pointer to the page contents rather than juggling mappings about.  In such a
+case, the unmap operation may be a null operation.
+
+If CONFIG_MMU is not set, then there can be no temporary mappings and no
+highmem.  In such a case, the arithmetic approach will also be used.
+
+
+========
+i386 PAE
+========
+
+The i386 arch, under some circumstances, will permit you to stick up to 64GiB
+of RAM into your 32-bit machine.  This has a number of consequences:
+
+ (*) Linux needs a page-frame structure for each page in the system and the
+     pageframes need to live in the permanent mapping, which means:
+
+ (*) you can have 896M/sizeof(struct page) page-frames at most; with struct
+     page being 32-bytes that would end up being something in the order of 112G
+     worth of pages; the kernel, however, needs to store more than just
+     page-frames in that memory...
+
+ (*) PAE makes your page tables larger - which slows the system down as more
+     data has to be accessed to traverse in TLB fills and the like.  One
+     advantage is that PAE has more PTE bits and can provide advanced features
+     like NX and PAT.
+
+The general recommendation is that you don't use more than 8GiB on a 32-bit
+machine - although more might work for you and your workload, you're pretty
+much on your own - don't expect kernel developers to really care much if things
+come apart.
diff --git a/MAINTAINERS b/MAINTAINERS
index 146b8a068a4e..014b648f99ed 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -657,7 +657,7 @@ ARM/FARADAY FA526 PORT
 M:      Hans Ulli Kroll <ulli.kroll@googlemail.com>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:      Maintained
-T:      git://git.berlios.de/gemini-board
+T:      git git://git.berlios.de/gemini-board
 F:      arch/arm/mm/*-fa*
 
 ARM/FOOTBRIDGE ARCHITECTURE
@@ -672,7 +672,7 @@ ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
 M:      Sascha Hauer <kernel@pengutronix.de>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:      Maintained
-T:      git://git.pengutronix.de/git/imx/linux-2.6.git
+T:      git git://git.pengutronix.de/git/imx/linux-2.6.git
 F:      arch/arm/mach-mx*/
 F:      arch/arm/plat-mxc/
 
@@ -710,8 +710,7 @@ ARM/INCOME PXA270 SUPPORT
 M:      Marek Vasut <marek.vasut@gmail.com>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:      Maintained
-F:      arch/arm/mach-pxa/income.c
-F:      arch/arm/mach-pxa/include/mach-pxa/income.h
+F:      arch/arm/mach-pxa/colibri-pxa270-income.c
 
 ARM/INTEL IOP32X ARM ARCHITECTURE
 M:      Lennert Buytenhek <kernel@wantstofly.org>
@@ -758,13 +757,7 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:      Maintained
 F:      arch/arm/mach-ixp4xx/
 
-ARM/INTEL RESEARCH IMOTE 2 MACHINE SUPPORT
-M:      Jonathan Cameron <jic23@cam.ac.uk>
-L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S:      Maintained
-F:      arch/arm/mach-pxa/imote2.c
-
-ARM/INTEL RESEARCH STARGATE 2 MACHINE SUPPORT
+ARM/INTEL RESEARCH IMOTE/STARGATE 2 MACHINE SUPPORT
 M:      Jonathan Cameron <jic23@cam.ac.uk>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:      Maintained
@@ -929,40 +922,20 @@ W:	http://www.fluff.org/ben/linux/
 S:      Maintained
 F:      arch/arm/mach-s3c2410/
 
-ARM/S3C2440 ARM ARCHITECTURE
+ARM/S3C244x ARM ARCHITECTURE
 M:      Ben Dooks <ben-linux@fluff.org>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 W:      http://www.fluff.org/ben/linux/
 S:      Maintained
 F:      arch/arm/mach-s3c2440/
-
-ARM/S3C2442 ARM ARCHITECTURE
-M:      Ben Dooks <ben-linux@fluff.org>
-L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-W:      http://www.fluff.org/ben/linux/
-S:      Maintained
-F:      arch/arm/mach-s3c2442/
-
-ARM/S3C2443 ARM ARCHITECTURE
-M:      Ben Dooks <ben-linux@fluff.org>
-L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-W:      http://www.fluff.org/ben/linux/
-S:      Maintained
 F:      arch/arm/mach-s3c2443/
 
-ARM/S3C6400 ARM ARCHITECTURE
+ARM/S3C64xx ARM ARCHITECTURE
 M:      Ben Dooks <ben-linux@fluff.org>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 W:      http://www.fluff.org/ben/linux/
 S:      Maintained
-F:      arch/arm/mach-s3c6400/
-
-ARM/S3C6410 ARM ARCHITECTURE
-M:      Ben Dooks <ben-linux@fluff.org>
-L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-W:      http://www.fluff.org/ben/linux/
-S:      Maintained
-F:      arch/arm/mach-s3c6410/
+F:      arch/arm/mach-s3c64xx/
 
 ARM/S5P ARM ARCHITECTURES
 M:      Kukjin Kim <kgene.kim@samsung.com>
@@ -3867,7 +3840,7 @@ F:	drivers/net/wireless/mwl8k.c
 MARVELL SOC MMC/SD/SDIO CONTROLLER DRIVER
 M:      Nicolas Pitre <nico@fluxnic.net>
 S:      Odd Fixes
-F: drivers/mmc/host/mvsdio.*
+F:      drivers/mmc/host/mvsdio.*
 
 MARVELL YUKON / SYSKONNECT DRIVER
 M:      Mirko Lindner <mlindner@syskonnect.de>
@@ -4958,7 +4931,7 @@ RCUTORTURE MODULE
 M:      Josh Triplett <josh@freedesktop.org>
 M:      "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
 S:      Supported
-T:      git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git
+T:      git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git
 F:      Documentation/RCU/torture.txt
 F:      kernel/rcutorture.c
 
@@ -4983,7 +4956,7 @@ M:	Dipankar Sarma <dipankar@in.ibm.com>
 M:      "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
 W:      http://www.rdrop.com/users/paulmck/rclock/
 S:      Supported
-T:      git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git
+T:      git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git
 F:      Documentation/RCU/
 F:      include/linux/rcu*
 F:      include/linux/srcu*
@@ -6141,13 +6114,6 @@ L:	linux-usb@vger.kernel.org
 S:      Maintained
 F:      drivers/usb/serial/option.c
 
-USB OV511 DRIVER
-M:      Mark McClelland <mmcclell@bigfoot.com>
-L:      linux-usb@vger.kernel.org
-W:      http://alpha.dyndns.org/ov511/
-S:      Maintained
-F:      drivers/media/video/ov511.*
-
 USB PEGASUS DRIVER
 M:      Petko Manolov <petkan@users.sourceforge.net>
 L:      linux-usb@vger.kernel.org
@@ -6308,16 +6274,6 @@ S:	Supported
 F:      drivers/usb/host/xhci*
 F:      drivers/usb/host/pci-quirks*
 
-USB ZC0301 DRIVER
-M:      Luca Risolia <luca.risolia@studio.unibo.it>
-L:      linux-usb@vger.kernel.org
-L:      linux-media@vger.kernel.org
-T:      git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6.git
-W:      http://www.linux-projects.org
-S:      Maintained
-F:      Documentation/video4linux/zc0301.txt
-F:      drivers/media/video/zc0301/
-
 USB ZD1201 DRIVER
 L:      linux-wireless@vger.kernel.org
 W:      http://linux-lc100020.sourceforge.net
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index d04ccd73af45..28f93a6c0fde 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -55,6 +55,9 @@ config ZONE_DMA
         bool
         default y
 
+config ARCH_DMA_ADDR_T_64BIT
+        def_bool y
+
 config NEED_DMA_MAP_STATE
        def_bool y
 
diff --git a/arch/alpha/include/asm/core_mcpcia.h b/arch/alpha/include/asm/core_mcpcia.h
index 21ac53383b37..9f67a056b461 100644
--- a/arch/alpha/include/asm/core_mcpcia.h
+++ b/arch/alpha/include/asm/core_mcpcia.h
@@ -247,7 +247,7 @@ struct el_MCPCIA_uncorrected_frame_mcheck {
 #define vip     volatile int __force *
 #define vuip    volatile unsigned int __force *
 
-#ifdef MCPCIA_ONE_HAE_WINDOW
+#ifndef MCPCIA_ONE_HAE_WINDOW
 #define MCPCIA_FROB_MMIO                                                \
         if (__mcpcia_is_mmio(hose)) {                                   \
                 set_hae(hose & 0xffffffff);                             \
diff --git a/arch/alpha/include/asm/core_t2.h b/arch/alpha/include/asm/core_t2.h
index 471c07292e0b..91b46801b290 100644
--- a/arch/alpha/include/asm/core_t2.h
+++ b/arch/alpha/include/asm/core_t2.h
@@ -1,6 +1,9 @@
 #ifndef __ALPHA_T2__H__
 #define __ALPHA_T2__H__
 
+/* Fit everything into one 128MB HAE window. */
+#define T2_ONE_HAE_WINDOW 1
+
 #include <linux/types.h>
 #include <linux/spinlock.h>
 #include <asm/compiler.h>
@@ -19,7 +22,7 @@
  *
  */
 
-#define T2_MEM_R1_MASK 0x07ffffff  /* Mem sparse region 1 mask is 26 bits */
+#define T2_MEM_R1_MASK 0x07ffffff  /* Mem sparse region 1 mask is 27 bits */
 
 /* GAMMA-SABLE is a SABLE with EV5-based CPUs */
 /* All LYNX machines, EV4 or EV5, use the GAMMA bias also */
@@ -85,7 +88,9 @@
 #define T2_DIR                  (IDENT_ADDR + GAMMA_BIAS + 0x38e0004a0UL)
 #define T2_ICE                  (IDENT_ADDR + GAMMA_BIAS + 0x38e0004c0UL)
 
+#ifndef T2_ONE_HAE_WINDOW
 #define T2_HAE_ADDRESS          T2_HAE_1
+#endif
 
 /*  T2 CSRs are in the non-cachable primary IO space from 3.8000.0000 to
  3.8fff.ffff
@@ -429,13 +434,15 @@ extern inline void t2_outl(u32 b, unsigned long addr)
  *
  */
 
+#ifdef T2_ONE_HAE_WINDOW
+#define t2_set_hae
+#else
 #define t2_set_hae { \
-        msb = addr  >> 27; \
+        unsigned long msb = addr >> 27; \
         addr &= T2_MEM_R1_MASK; \
         set_hae(msb); \
 }
-
-extern raw_spinlock_t t2_hae_lock;
+#endif
 
 /*
  * NOTE: take T2_DENSE_MEM off in each readX/writeX routine, since
@@ -446,28 +453,22 @@ extern raw_spinlock_t t2_hae_lock;
 __EXTERN_INLINE u8 t2_readb(const volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long result, msb;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long result;
 
         t2_set_hae;
 
         result = *(vip) ((addr << 5) + T2_SPARSE_MEM + 0x00);
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
         return __kernel_extbl(result, addr & 3);
 }
 
 __EXTERN_INLINE u16 t2_readw(const volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long result, msb;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long result;
 
         t2_set_hae;
 
         result = *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x08);
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
         return __kernel_extwl(result, addr & 3);
 }
 
@@ -478,59 +479,47 @@ __EXTERN_INLINE u16 t2_readw(const volatile void __iomem *xaddr)
 __EXTERN_INLINE u32 t2_readl(const volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long result, msb;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long result;
 
         t2_set_hae;
 
         result = *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18);
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
         return result & 0xffffffffUL;
 }
 
 __EXTERN_INLINE u64 t2_readq(const volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long r0, r1, work, msb;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long r0, r1, work;
 
         t2_set_hae;
 
         work = (addr << 5) + T2_SPARSE_MEM + 0x18;
         r0 = *(vuip)(work);
         r1 = *(vuip)(work + (4 << 5));
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
         return r1 << 32 | r0;
 }
 
 __EXTERN_INLINE void t2_writeb(u8 b, volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long msb, w;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long w;
 
         t2_set_hae;
 
         w = __kernel_insbl(b, addr & 3);
         *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x00) = w;
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 __EXTERN_INLINE void t2_writew(u16 b, volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long msb, w;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long w;
 
         t2_set_hae;
 
         w = __kernel_inswl(b, addr & 3);
         *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x08) = w;
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 /*
@@ -540,29 +529,22 @@ __EXTERN_INLINE void t2_writew(u16 b, volatile void __iomem *xaddr)
 __EXTERN_INLINE void t2_writel(u32 b, volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long msb;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
 
         t2_set_hae;
 
         *(vuip) ((addr << 5) + T2_SPARSE_MEM + 0x18) = b;
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 __EXTERN_INLINE void t2_writeq(u64 b, volatile void __iomem *xaddr)
 {
         unsigned long addr = (unsigned long) xaddr - T2_DENSE_MEM;
-        unsigned long msb, work;
-        unsigned long flags;
-        raw_spin_lock_irqsave(&t2_hae_lock, flags);
+        unsigned long work;
 
         t2_set_hae;
 
         work = (addr << 5) + T2_SPARSE_MEM + 0x18;
         *(vuip)work = b;
         *(vuip)(work + (4 << 5)) = b >> 32;
-        raw_spin_unlock_irqrestore(&t2_hae_lock, flags);
 }
 
 __EXTERN_INLINE void __iomem *t2_ioportmap(unsigned long addr)
diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h
index 71a243294142..de98a732683d 100644
--- a/arch/alpha/include/asm/pgtable.h
+++ b/arch/alpha/include/asm/pgtable.h
@@ -318,9 +318,7 @@ extern inline pte_t * pte_offset_kernel(pmd_t * dir, unsigned long address)
 }
 
 #define pte_offset_map(dir,addr)        pte_offset_kernel((dir),(addr))
-#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir),(addr))
 #define pte_unmap(pte)                  do { } while (0)
-#define pte_unmap_nested(pte)           do { } while (0)
 
 extern pgd_t swapper_pg_dir[1024];
 
diff --git a/arch/alpha/kernel/core_t2.c b/arch/alpha/kernel/core_t2.c
index e6d90568b65d..2f770e994289 100644
--- a/arch/alpha/kernel/core_t2.c
+++ b/arch/alpha/kernel/core_t2.c
@@ -74,8 +74,6 @@
 # define DBG(args)
 #endif
 
-DEFINE_RAW_SPINLOCK(t2_hae_lock);
-
 static volatile unsigned int t2_mcheck_any_expected;
 static volatile unsigned int t2_mcheck_last_taken;
 
@@ -406,6 +404,7 @@ void __init
 t2_init_arch(void)
 {
         struct pci_controller *hose;
+        struct resource *hae_mem;
         unsigned long temp;
         unsigned int i;
 
@@ -433,7 +432,13 @@ t2_init_arch(void)
          */
         pci_isa_hose = hose = alloc_pci_controller();
         hose->io_space = &ioport_resource;
-        hose->mem_space = &iomem_resource;
+        hae_mem = alloc_resource();
+        hae_mem->start = 0;
+        hae_mem->end = T2_MEM_R1_MASK;
+        hae_mem->name = pci_hae0_name;
+        if (request_resource(&iomem_resource, hae_mem) < 0)
+                printk(KERN_ERR "Failed to request HAE_MEM\n");
+        hose->mem_space = hae_mem;
         hose->index = 0;
 
         hose->sparse_mem_base = T2_SPARSE_MEM - IDENT_ADDR;
diff --git a/arch/alpha/kernel/machvec_impl.h b/arch/alpha/kernel/machvec_impl.h
index 512685f78097..7fa62488bd16 100644
--- a/arch/alpha/kernel/machvec_impl.h
+++ b/arch/alpha/kernel/machvec_impl.h
@@ -25,6 +25,9 @@
 #ifdef MCPCIA_ONE_HAE_WINDOW
 #define MCPCIA_HAE_ADDRESS      (&alpha_mv.hae_cache)
 #endif
+#ifdef T2_ONE_HAE_WINDOW
+#define T2_HAE_ADDRESS          (&alpha_mv.hae_cache)
+#endif
 
 /* Only a few systems don't define IACK_SC, handling all interrupts through
    the SRM console.  But splitting out that one case from IO() below
diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h
index 5aff58126602..1fc684e70ab6 100644
--- a/arch/arm/include/asm/highmem.h
+++ b/arch/arm/include/asm/highmem.h
@@ -35,9 +35,9 @@ extern void kunmap_high_l1_vipt(struct page *page, pte_t saved_pte);
 #ifdef CONFIG_HIGHMEM
 extern void *kmap(struct page *page);
 extern void kunmap(struct page *page);
-extern void *kmap_atomic(struct page *page, enum km_type type);
-extern void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
-extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
+extern void *__kmap_atomic(struct page *page);
+extern void __kunmap_atomic(void *kvaddr);
+extern void *kmap_atomic_pfn(unsigned long pfn);
 extern struct page *kmap_atomic_to_page(const void *ptr);
 #endif
 
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index a9672e8406a3..b155414192da 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -263,17 +263,15 @@ extern struct page *empty_zero_page;
 #define pte_page(pte)           (pfn_to_page(pte_pfn(pte)))
 #define pte_offset_kernel(dir,addr)     (pmd_page_vaddr(*(dir)) + __pte_index(addr))
 
-#define pte_offset_map(dir,addr)        (__pte_map(dir, KM_PTE0) + __pte_index(addr))
-#define pte_offset_map_nested(dir,addr) (__pte_map(dir, KM_PTE1) + __pte_index(addr))
-#define pte_unmap(pte)                  __pte_unmap(pte, KM_PTE0)
-#define pte_unmap_nested(pte)           __pte_unmap(pte, KM_PTE1)
+#define pte_offset_map(dir,addr)        (__pte_map(dir) + __pte_index(addr))
+#define pte_unmap(pte)                  __pte_unmap(pte)
 
 #ifndef CONFIG_HIGHPTE
-#define __pte_map(dir,km)       pmd_page_vaddr(*(dir))
-#define __pte_unmap(pte,km)     do { } while (0)
+#define __pte_map(dir)          pmd_page_vaddr(*(dir))
+#define __pte_unmap(pte)        do { } while (0)
 #else
-#define __pte_map(dir,km)       ((pte_t *)kmap_atomic(pmd_page(*(dir)), km) + PTRS_PER_PTE)
-#define __pte_unmap(pte,km)     kunmap_atomic((pte - PTRS_PER_PTE), km)
+#define __pte_map(dir)          ((pte_t *)kmap_atomic(pmd_page(*(dir))) + PTRS_PER_PTE)
+#define __pte_unmap(pte)        kunmap_atomic((pte - PTRS_PER_PTE))
 #endif
 
 #define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext)
diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index 4566bd1c8660..ef06c66a6f16 100644
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -358,8 +358,7 @@ static int calc_clk_div(struct clk *clk, unsigned long rate,
         int i, found = 0, __div = 0, __pdiv = 0;
 
         /* Don't exceed the maximum rate */
-        max_rate = max(max(clk_pll1.rate / 4, clk_pll2.rate / 4),
-                       clk_xtali.rate / 4);
+        max_rate = max3(clk_pll1.rate / 4, clk_pll2.rate / 4, clk_xtali.rate / 4);
         rate = min(rate, max_rate);
 
         /*
diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c
index 8440d952ba6d..c493d7244d3d 100644
--- a/arch/arm/mm/fault-armv.c
+++ b/arch/arm/mm/fault-armv.c
@@ -89,13 +89,13 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address,
          * open-code the spin-locking.
          */
         ptl = pte_lockptr(vma->vm_mm, pmd);
-        pte = pte_offset_map_nested(pmd, address);
+        pte = pte_offset_map(pmd, address);
         spin_lock(ptl);
 
         ret = do_adjust_pte(vma, address, pfn, pte);
 
         spin_unlock(ptl);
-        pte_unmap_nested(pte);
+        pte_unmap(pte);
 
         return ret;
 }
diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c
index 1fbdb55bfd1b..c00f119babbf 100644
--- a/arch/arm/mm/highmem.c
+++ b/arch/arm/mm/highmem.c
@@ -36,18 +36,17 @@ void kunmap(struct page *page)
 }
 EXPORT_SYMBOL(kunmap);
 
-void *kmap_atomic(struct page *page, enum km_type type)
+void *__kmap_atomic(struct page *page)
 {
         unsigned int idx;
         unsigned long vaddr;
         void *kmap;
+        int type;
 
         pagefault_disable();
         if (!PageHighMem(page))
                 return page_address(page);
 
-        debug_kmap_atomic(type);
-
 #ifdef CONFIG_DEBUG_HIGHMEM
         /*
          * There is no cache coherency issue when non VIVT, so force the
@@ -61,6 +60,8 @@ void *kmap_atomic(struct page *page, enum km_type type)
         if (kmap)
                 return kmap;
 
+        type = kmap_atomic_idx_push();
+
         idx = type + KM_TYPE_NR * smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #ifdef CONFIG_DEBUG_HIGHMEM
@@ -80,14 +81,17 @@ void *kmap_atomic(struct page *page, enum km_type type)
 
         return (void *)vaddr;
 }
-EXPORT_SYMBOL(kmap_atomic);
+EXPORT_SYMBOL(__kmap_atomic);
 
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+void __kunmap_atomic(void *kvaddr)
 {
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        unsigned int idx = type + KM_TYPE_NR * smp_processor_id();
+        int idx, type;
 
         if (kvaddr >= (void *)FIXADDR_START) {
+                type = kmap_atomic_idx_pop();
+                idx = type + KM_TYPE_NR * smp_processor_id();
+
                 if (cache_is_vivt())
                         __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE);
 #ifdef CONFIG_DEBUG_HIGHMEM
@@ -103,15 +107,16 @@ void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
         }
         pagefault_enable();
 }
-EXPORT_SYMBOL(kunmap_atomic_notypecheck);
+EXPORT_SYMBOL(__kunmap_atomic);
 
-void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
+void *kmap_atomic_pfn(unsigned long pfn)
 {
-        unsigned int idx;
         unsigned long vaddr;
+        int idx, type;
 
         pagefault_disable();
 
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR * smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #ifdef CONFIG_DEBUG_HIGHMEM
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index be5f58e153bf..69bbfc6645a6 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -57,9 +57,9 @@ pgd_t *get_pgd_slow(struct mm_struct *mm)
                         goto no_pte;
 
                 init_pmd = pmd_offset(init_pgd, 0);
-                init_pte = pte_offset_map_nested(init_pmd, 0);
+                init_pte = pte_offset_map(init_pmd, 0);
                 set_pte_ext(new_pte, *init_pte, 0);
-                pte_unmap_nested(init_pte);
+                pte_unmap(init_pte);
                 pte_unmap(new_pte);
         }
 
diff --git a/arch/avr32/include/asm/pgtable.h b/arch/avr32/include/asm/pgtable.h
index a9ae30c41e74..6fbfea61f7bb 100644
--- a/arch/avr32/include/asm/pgtable.h
+++ b/arch/avr32/include/asm/pgtable.h
@@ -319,9 +319,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 #define pte_offset_kernel(dir, address)                                 \
         ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
 #define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
-#define pte_offset_map_nested(dir, address) pte_offset_kernel(dir, address)
 #define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
 
 struct vm_area_struct;
 extern void update_mmu_cache(struct vm_area_struct * vma,
diff --git a/arch/blackfin/include/asm/entry.h b/arch/blackfin/include/asm/entry.h
index a6886f6e4819..4104d5783e2c 100644
--- a/arch/blackfin/include/asm/entry.h
+++ b/arch/blackfin/include/asm/entry.h
@@ -15,14 +15,6 @@
 #define LFLUSH_I_AND_D  0x00000808
 #define LSIGTRAP        5
 
-/* process bits for task_struct.flags */
-#define PF_TRACESYS_OFF 3
-#define PF_TRACESYS_BIT 5
-#define PF_PTRACED_OFF  3
-#define PF_PTRACED_BIT  4
-#define PF_DTRACE_OFF   1
-#define PF_DTRACE_BIT   5
-
 /*
  * NOTE!  The single-stepping code assumes that all interrupt handlers
  * start by saving SYSCFG on the stack with their first instruction.
diff --git a/arch/cris/include/asm/pgtable.h b/arch/cris/include/asm/pgtable.h
index f63d6fccbc6c..9eaae217b21b 100644
--- a/arch/cris/include/asm/pgtable.h
+++ b/arch/cris/include/asm/pgtable.h
@@ -248,10 +248,8 @@ static inline pgd_t * pgd_offset(const struct mm_struct *mm, unsigned long addre
         ((pte_t *) pmd_page_vaddr(*(dir)) +  __pte_offset(address))
 #define pte_offset_map(dir, address) \
         ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
 
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 #define pte_pfn(x)              ((unsigned long)(__va((x).pte)) >> PAGE_SHIFT)
 #define pfn_pte(pfn, prot)      __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
 
diff --git a/arch/frv/include/asm/highmem.h b/arch/frv/include/asm/highmem.h
index cb4c317eaecc..a8d6565d415d 100644
--- a/arch/frv/include/asm/highmem.h
+++ b/arch/frv/include/asm/highmem.h
@@ -112,12 +112,11 @@ extern struct page *kmap_atomic_to_page(void *ptr);
         (void *) damlr;                                                                           \
 })
 
-static inline void *kmap_atomic(struct page *page, enum km_type type)
+static inline void *kmap_atomic_primary(struct page *page, enum km_type type)
 {
         unsigned long paddr;
 
         pagefault_disable();
-        debug_kmap_atomic(type);
         paddr = page_to_phys(page);
 
         switch (type) {
@@ -125,14 +124,6 @@ static inline void *kmap_atomic(struct page *page, enum km_type type)
         case 1:         return __kmap_atomic_primary(1, paddr, 3);
         case 2:         return __kmap_atomic_primary(2, paddr, 4);
         case 3:         return __kmap_atomic_primary(3, paddr, 5);
-        case 4:         return __kmap_atomic_primary(4, paddr, 6);
-        case 5:         return __kmap_atomic_primary(5, paddr, 7);
-        case 6:         return __kmap_atomic_primary(6, paddr, 8);
-        case 7:         return __kmap_atomic_primary(7, paddr, 9);
-        case 8:         return __kmap_atomic_primary(8, paddr, 10);
-
-        case 9 ... 9 + NR_TLB_LINES - 1:
-                return __kmap_atomic_secondary(type - 9, paddr);
 
         default:
                 BUG();
@@ -152,22 +143,13 @@ do {									\
         asm volatile("tlbpr %0,gr0,#4,#1" : : "r"(vaddr) : "memory");   \
 } while(0)
 
-static inline void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+static inline void kunmap_atomic_primary(void *kvaddr, enum km_type type)
 {
         switch (type) {
         case 0:         __kunmap_atomic_primary(0, 2);  break;
         case 1:         __kunmap_atomic_primary(1, 3);  break;
         case 2:         __kunmap_atomic_primary(2, 4);  break;
         case 3:         __kunmap_atomic_primary(3, 5);  break;
-        case 4:         __kunmap_atomic_primary(4, 6);  break;
-        case 5:         __kunmap_atomic_primary(5, 7);  break;
-        case 6:         __kunmap_atomic_primary(6, 8);  break;
-        case 7:         __kunmap_atomic_primary(7, 9);  break;
-        case 8:         __kunmap_atomic_primary(8, 10); break;
-
-        case 9 ... 9 + NR_TLB_LINES - 1:
-                __kunmap_atomic_secondary(type - 9, kvaddr);
-                break;
 
         default:
                 BUG();
@@ -175,6 +157,9 @@ static inline void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
         pagefault_enable();
 }
 
+void *__kmap_atomic(struct page *page);
+void __kunmap_atomic(void *kvaddr);
+
 #endif /* !__ASSEMBLY__ */
 
 #endif /* __KERNEL__ */
diff --git a/arch/frv/include/asm/pgtable.h b/arch/frv/include/asm/pgtable.h
index c18b0d32e636..6bc241e4b4f8 100644
--- a/arch/frv/include/asm/pgtable.h
+++ b/arch/frv/include/asm/pgtable.h
@@ -451,17 +451,12 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 
 #if defined(CONFIG_HIGHPTE)
 #define pte_offset_map(dir, address) \
-        ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
-#define pte_offset_map_nested(dir, address) \
-        ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
-#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
-#define pte_unmap_nested(pte) kunmap_atomic((pte), KM_PTE1)
+        ((pte_t *)kmap_atomic(pmd_page(*(dir))) + pte_index(address))
+#define pte_unmap(pte) kunmap_atomic(pte)
 #else
 #define pte_offset_map(dir, address) \
         ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_offset_map_nested(dir, address) pte_offset_map((dir), (address))
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 #endif
 
 /*
diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c
index 85d110b71cf7..41098a3803a2 100644
--- a/arch/frv/mb93090-mb00/pci-dma.c
+++ b/arch/frv/mb93090-mb00/pci-dma.c
@@ -61,14 +61,14 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
         dampr2 = __get_DAMPR(2);
 
         for (i = 0; i < nents; i++) {
-                vaddr = kmap_atomic(sg_page(&sg[i]), __KM_CACHE);
+                vaddr = kmap_atomic_primary(sg_page(&sg[i]), __KM_CACHE);
 
                 frv_dcache_writeback((unsigned long) vaddr,
                                      (unsigned long) vaddr + PAGE_SIZE);
 
         }
 
-        kunmap_atomic(vaddr, __KM_CACHE);
+        kunmap_atomic_primary(vaddr, __KM_CACHE);
         if (dampr2) {
                 __set_DAMPR(2, dampr2);
                 __set_IAMPR(2, dampr2);
diff --git a/arch/frv/mm/cache-page.c b/arch/frv/mm/cache-page.c
index 0261cbe153b5..b24ade27a0f0 100644
--- a/arch/frv/mm/cache-page.c
+++ b/arch/frv/mm/cache-page.c
@@ -26,11 +26,11 @@ void flush_dcache_page(struct page *page)
 
         dampr2 = __get_DAMPR(2);
 
-        vaddr = kmap_atomic(page, __KM_CACHE);
+        vaddr = kmap_atomic_primary(page, __KM_CACHE);
 
         frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE);
 
-        kunmap_atomic(vaddr, __KM_CACHE);
+        kunmap_atomic_primary(vaddr, __KM_CACHE);
 
         if (dampr2) {
                 __set_DAMPR(2, dampr2);
@@ -54,12 +54,12 @@ void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
 
         dampr2 = __get_DAMPR(2);
 
-        vaddr = kmap_atomic(page, __KM_CACHE);
+        vaddr = kmap_atomic_primary(page, __KM_CACHE);
 
         start = (start & ~PAGE_MASK) | (unsigned long) vaddr;
         frv_cache_wback_inv(start, start + len);
 
-        kunmap_atomic(vaddr, __KM_CACHE);
+        kunmap_atomic_primary(vaddr, __KM_CACHE);
 
         if (dampr2) {
                 __set_DAMPR(2, dampr2);
diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c
index eadd07658075..61088dcc1594 100644
--- a/arch/frv/mm/highmem.c
+++ b/arch/frv/mm/highmem.c
@@ -36,3 +36,53 @@ struct page *kmap_atomic_to_page(void *ptr)
 {
         return virt_to_page(ptr);
 }
+
+void *__kmap_atomic(struct page *page)
+{
+        unsigned long paddr;
+        int type;
+
+        pagefault_disable();
+        type = kmap_atomic_idx_push();
+        paddr = page_to_phys(page);
+
+        switch (type) {
+        /*
+         * The first 4 primary maps are reserved for architecture code
+         */
+        case 0:         return __kmap_atomic_primary(4, paddr, 6);
+        case 1:         return __kmap_atomic_primary(5, paddr, 7);
+        case 2:         return __kmap_atomic_primary(6, paddr, 8);
+        case 3:         return __kmap_atomic_primary(7, paddr, 9);
+        case 4:         return __kmap_atomic_primary(8, paddr, 10);
+
+        case 5 ... 5 + NR_TLB_LINES - 1:
+                return __kmap_atomic_secondary(type - 5, paddr);
+
+        default:
+                BUG();
+                return NULL;
+        }
+}
+EXPORT_SYMBOL(__kmap_atomic);
+
+void __kunmap_atomic(void *kvaddr)
+{
+        int type = kmap_atomic_idx_pop();
+        switch (type) {
+        case 0:         __kunmap_atomic_primary(4, 6);  break;
+        case 1:         __kunmap_atomic_primary(5, 7);  break;
+        case 2:         __kunmap_atomic_primary(6, 8);  break;
+        case 3:         __kunmap_atomic_primary(7, 9);  break;
+        case 4:         __kunmap_atomic_primary(8, 10); break;
+
+        case 5 ... 5 + NR_TLB_LINES - 1:
+                __kunmap_atomic_secondary(type - 5, kvaddr);
+                break;
+
+        default:
+                BUG();
+        }
+        pagefault_enable();
+}
+EXPORT_SYMBOL(__kunmap_atomic);
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index c3286f42e501..1a97af31ef17 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -406,9 +406,7 @@ pgd_offset (const struct mm_struct *mm, unsigned long address)
 #define pte_index(addr)         (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
 #define pte_offset_kernel(dir,addr)     ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(addr))
 #define pte_offset_map(dir,addr)        pte_offset_kernel(dir, addr)
-#define pte_offset_map_nested(dir,addr) pte_offset_map(dir, addr)
 #define pte_unmap(pte)                  do { } while (0)
-#define pte_unmap_nested(pte)           do { } while (0)
 
 /* atomic versions of the some PTE manipulations: */
 
diff --git a/arch/m32r/include/asm/pgtable.h b/arch/m32r/include/asm/pgtable.h
index e6359c566b50..8a28cfea2729 100644
--- a/arch/m32r/include/asm/pgtable.h
+++ b/arch/m32r/include/asm/pgtable.h
@@ -332,9 +332,7 @@ static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
         ((pte_t *)pmd_page_vaddr(*(dir)) + pte_index(address))
 #define pte_offset_map(dir, address)    \
         ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_offset_map_nested(dir, address)     pte_offset_map(dir, address)
 #define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
 
 /* Encode and de-code a swap entry */
 #define __swp_type(x)                   (((x).val >> 2) & 0x1f)
diff --git a/arch/m68k/include/asm/entry_mm.h b/arch/m68k/include/asm/entry_mm.h
index e41fea399bfe..73b8c8fbed9c 100644
--- a/arch/m68k/include/asm/entry_mm.h
+++ b/arch/m68k/include/asm/entry_mm.h
@@ -50,14 +50,6 @@
 
 LFLUSH_I_AND_D = 0x00000808
 
-/* process bits for task_struct.ptrace */
-PT_TRACESYS_OFF = 3
-PT_TRACESYS_BIT = 1
-PT_PTRACED_OFF = 3
-PT_PTRACED_BIT = 0
-PT_DTRACE_OFF = 3
-PT_DTRACE_BIT = 2
-
 #define SAVE_ALL_INT save_all_int
 #define SAVE_ALL_SYS save_all_sys
 #define RESTORE_ALL restore_all
diff --git a/arch/m68k/include/asm/entry_no.h b/arch/m68k/include/asm/entry_no.h
index 80e41492aa2a..26be277394f9 100644
--- a/arch/m68k/include/asm/entry_no.h
+++ b/arch/m68k/include/asm/entry_no.h
@@ -32,16 +32,6 @@
 
 #ifdef __ASSEMBLY__
 
-/* process bits for task_struct.flags */
-PF_TRACESYS_OFF = 3
-PF_TRACESYS_BIT = 5
-PF_PTRACED_OFF = 3
-PF_PTRACED_BIT = 4
-PF_DTRACE_OFF = 1
-PF_DTRACE_BIT = 5
-
-LENOSYS = 38
-
 #define SWITCH_STACK_SIZE (6*4+4)       /* Includes return address */
 
 /*
diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h
index 8e9a8a754dde..45bd3f589bf0 100644
--- a/arch/m68k/include/asm/motorola_pgtable.h
+++ b/arch/m68k/include/asm/motorola_pgtable.h
@@ -221,9 +221,7 @@ static inline pte_t *pte_offset_kernel(pmd_t *pmdp, unsigned long address)
 }
 
 #define pte_offset_map(pmdp,address) ((pte_t *)__pmd_page(*pmdp) + (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
-#define pte_offset_map_nested(pmdp, address) pte_offset_map(pmdp, address)
 #define pte_unmap(pte)          ((void)0)
-#define pte_unmap_nested(pte)   ((void)0)
 
 /*
  * Allocate and free page tables. The xxx_kernel() versions are
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h
index f847ec732d62..cf5fad9b5250 100644
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -219,9 +219,7 @@ static inline pte_t pgoff_to_pte(unsigned off)
 #define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address))
 /* FIXME: should we bother with kmap() here? */
 #define pte_offset_map(pmd, address) ((pte_t *)kmap(pmd_page(*pmd)) + pte_index(address))
-#define pte_offset_map_nested(pmd, address) pte_offset_map(pmd, address)
 #define pte_unmap(pte) kunmap(pte)
-#define pte_unmap_nested(pte) kunmap(pte)
 
 /* Macros to (de)construct the fake PTEs representing swap pages. */
 #define __swp_type(x)           ((x).val & 0x7F)
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index d4f421672d3b..cae268c22ba2 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -504,12 +504,9 @@ static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
 #define pte_offset_kernel(dir, addr)    \
         ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(addr))
 #define pte_offset_map(dir, addr)               \
-        ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE0) + pte_index(addr))
-#define pte_offset_map_nested(dir, addr)        \
-        ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE1) + pte_index(addr))
+        ((pte_t *) kmap_atomic(pmd_page(*(dir))) + pte_index(addr))
 
-#define pte_unmap(pte)          kunmap_atomic(pte, KM_PTE0)
-#define pte_unmap_nested(pte)   kunmap_atomic(pte, KM_PTE1)
+#define pte_unmap(pte)          kunmap_atomic(pte)
 
 /* Encode and decode a nonlinear file mapping entry */
 #define PTE_FILE_MAX_BITS       29
diff --git a/arch/mips/include/asm/highmem.h b/arch/mips/include/asm/highmem.h
index 75753ca73bfd..77e644082a3b 100644
--- a/arch/mips/include/asm/highmem.h
+++ b/arch/mips/include/asm/highmem.h
@@ -45,18 +45,12 @@ extern pte_t *pkmap_page_table;
 extern void * kmap_high(struct page *page);
 extern void kunmap_high(struct page *page);
 
-extern void *__kmap(struct page *page);
-extern void __kunmap(struct page *page);
-extern void *__kmap_atomic(struct page *page, enum km_type type);
-extern void __kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
-extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
-extern struct page *__kmap_atomic_to_page(void *ptr);
-
-#define kmap                    __kmap
-#define kunmap                  __kunmap
-#define kmap_atomic             __kmap_atomic
-#define kunmap_atomic_notypecheck               __kunmap_atomic_notypecheck
-#define kmap_atomic_to_page     __kmap_atomic_to_page
+extern void *kmap(struct page *page);
+extern void kunmap(struct page *page);
+extern void *__kmap_atomic(struct page *page);
+extern void __kunmap_atomic(void *kvaddr);
+extern void *kmap_atomic_pfn(unsigned long pfn);
+extern struct page *kmap_atomic_to_page(void *ptr);
 
 #define flush_cache_kmaps()     flush_cache_all()
 
diff --git a/arch/mips/include/asm/pgtable-32.h b/arch/mips/include/asm/pgtable-32.h
index ae90412556d0..8a153d2fa62a 100644
--- a/arch/mips/include/asm/pgtable-32.h
+++ b/arch/mips/include/asm/pgtable-32.h
@@ -154,10 +154,7 @@ pfn_pte(unsigned long pfn, pgprot_t prot)
 
 #define pte_offset_map(dir, address)                                    \
         ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
-#define pte_offset_map_nested(dir, address)                             \
-        ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
 #define pte_unmap(pte) ((void)(pte))
-#define pte_unmap_nested(pte) ((void)(pte))
 
 #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
 
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 1be4b0fa30da..f00896087dda 100644
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -257,10 +257,7 @@ static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address)
         ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
 #define pte_offset_map(dir, address)                                    \
         ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
-#define pte_offset_map_nested(dir, address)                             \
-        ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
 #define pte_unmap(pte) ((void)(pte))
-#define pte_unmap_nested(pte) ((void)(pte))
 
 /*
  * Initialize a new pgd / pmd table with invalid pointers.
diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c
index 6a2b1bf9ef11..1e69b1fb4b85 100644
--- a/arch/mips/mm/highmem.c
+++ b/arch/mips/mm/highmem.c
@@ -9,7 +9,7 @@ static pte_t *kmap_pte;
 
 unsigned long highstart_pfn, highend_pfn;
 
-void *__kmap(struct page *page)
+void *kmap(struct page *page)
 {
         void *addr;
 
@@ -21,16 +21,16 @@ void *__kmap(struct page *page)
 
         return addr;
 }
-EXPORT_SYMBOL(__kmap);
+EXPORT_SYMBOL(kmap);
 
-void __kunmap(struct page *page)
+void kunmap(struct page *page)
 {
         BUG_ON(in_interrupt());
         if (!PageHighMem(page))
                 return;
         kunmap_high(page);
 }
-EXPORT_SYMBOL(__kunmap);
+EXPORT_SYMBOL(kunmap);
 
 /*
  * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because
@@ -41,17 +41,17 @@ EXPORT_SYMBOL(__kunmap);
  * kmaps are appropriate for short, tight code paths only.
  */
 
-void *__kmap_atomic(struct page *page, enum km_type type)
+void *__kmap_atomic(struct page *page)
 {
-        enum fixed_addresses idx;
         unsigned long vaddr;
+        int idx, type;
 
         /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
         pagefault_disable();
         if (!PageHighMem(page))
                 return page_address(page);
 
-        debug_kmap_atomic(type);
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR*smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #ifdef CONFIG_DEBUG_HIGHMEM
@@ -64,43 +64,47 @@ void *__kmap_atomic(struct page *page, enum km_type type)
 }
 EXPORT_SYMBOL(__kmap_atomic);
 
-void __kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+void __kunmap_atomic(void *kvaddr)
 {
-#ifdef CONFIG_DEBUG_HIGHMEM
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
+        int type;
 
         if (vaddr < FIXADDR_START) { // FIXME
                 pagefault_enable();
                 return;
         }
 
-        BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
+        type = kmap_atomic_idx_pop();
+#ifdef CONFIG_DEBUG_HIGHMEM
+        {
+                int idx = type + KM_TYPE_NR * smp_processor_id();
 
-        /*
-         * force other mappings to Oops if they'll try to access
-         * this pte without first remap it
-         */
-        pte_clear(&init_mm, vaddr, kmap_pte-idx);
-        local_flush_tlb_one(vaddr);
-#endif
+                BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
 
+                /*
+                 * force other mappings to Oops if they'll try to access
+                 * this pte without first remap it
+                 */
+                pte_clear(&init_mm, vaddr, kmap_pte-idx);
+                local_flush_tlb_one(vaddr);
+        }
+#endif
         pagefault_enable();
 }
-EXPORT_SYMBOL(__kunmap_atomic_notypecheck);
+EXPORT_SYMBOL(__kunmap_atomic);
 
 /*
  * This is the same as kmap_atomic() but can map memory that doesn't
  * have a struct page associated with it.
  */
-void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
+void *kmap_atomic_pfn(unsigned long pfn)
 {
-        enum fixed_addresses idx;
         unsigned long vaddr;
+        int idx, type;
 
         pagefault_disable();
 
-        debug_kmap_atomic(type);
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR*smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
         set_pte(kmap_pte-idx, pfn_pte(pfn, PAGE_KERNEL));
@@ -109,7 +113,7 @@ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
         return (void*) vaddr;
 }
 
-struct page *__kmap_atomic_to_page(void *ptr)
+struct page *kmap_atomic_to_page(void *ptr)
 {
         unsigned long idx, vaddr = (unsigned long)ptr;
         pte_t *pte;
diff --git a/arch/mn10300/include/asm/highmem.h b/arch/mn10300/include/asm/highmem.h
index b0b187a29b88..f577ba2268ca 100644
--- a/arch/mn10300/include/asm/highmem.h
+++ b/arch/mn10300/include/asm/highmem.h
@@ -70,15 +70,16 @@ static inline void kunmap(struct page *page)
  * be used in IRQ contexts, so in some (very limited) cases we need
  * it.
  */
-static inline unsigned long kmap_atomic(struct page *page, enum km_type type)
+static inline unsigned long __kmap_atomic(struct page *page)
 {
-        enum fixed_addresses idx;
         unsigned long vaddr;
+        int idx, type;
 
+        pagefault_disable();
         if (page < highmem_start_page)
                 return page_address(page);
 
-        debug_kmap_atomic(type);
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR * smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #if HIGHMEM_DEBUG
@@ -91,26 +92,35 @@ static inline unsigned long kmap_atomic(struct page *page, enum km_type type)
         return vaddr;
 }
 
-static inline void kunmap_atomic_notypecheck(unsigned long vaddr, enum km_type type)
+static inline void __kunmap_atomic(unsigned long vaddr)
 {
-#if HIGHMEM_DEBUG
-        enum fixed_addresses idx = type + KM_TYPE_NR * smp_processor_id();
+        int type;
 
-        if (vaddr < FIXADDR_START) /* FIXME */
+        if (vaddr < FIXADDR_START) { /* FIXME */
+                pagefault_enable();
                 return;
+        }
 
-        if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx))
-                BUG();
+        type = kmap_atomic_idx_pop();
 
-        /*
-         * force other mappings to Oops if they'll try to access
-         * this pte without first remap it
-         */
-        pte_clear(kmap_pte - idx);
-        __flush_tlb_one(vaddr);
+#if HIGHMEM_DEBUG
+        {
+                unsigned int idx;
+                idx = type + KM_TYPE_NR * smp_processor_id();
+
+                if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx))
+                        BUG();
+
+                /*
+                 * force other mappings to Oops if they'll try to access
+                 * this pte without first remap it
+                 */
+                pte_clear(kmap_pte - idx);
+                __flush_tlb_one(vaddr);
+        }
 #endif
+        pagefault_enable();
 }
-
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_HIGHMEM_H */
diff --git a/arch/mn10300/include/asm/pgtable.h b/arch/mn10300/include/asm/pgtable.h
index 16d88577f3e0..b049a8bd1577 100644
--- a/arch/mn10300/include/asm/pgtable.h
+++ b/arch/mn10300/include/asm/pgtable.h
@@ -457,9 +457,7 @@ static inline int set_kernel_exec(unsigned long vaddr, int enable)
 
 #define pte_offset_map(dir, address) \
         ((pte_t *) page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
 #define pte_unmap(pte)          do {} while (0)
-#define pte_unmap_nested(pte)   do {} while (0)
 
 /*
  * The MN10300 has external MMU info in the form of a TLB: this is adapted from
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 01c15035e783..865f37a8a881 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -397,9 +397,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 #define pte_offset_kernel(pmd, address) \
         ((pte_t *) pmd_page_vaddr(*(pmd)) + pte_index(address))
 #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
-#define pte_offset_map_nested(pmd, address) pte_offset_kernel(pmd, address)
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 
 #define pte_unmap(pte)                  do { } while (0)
 #define pte_unmap_nested(pte)           do { } while (0)
diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h
index d10d64a4be38..dbc264010d0b 100644
--- a/arch/powerpc/include/asm/highmem.h
+++ b/arch/powerpc/include/asm/highmem.h
@@ -60,9 +60,8 @@ extern pte_t *pkmap_page_table;
 
 extern void *kmap_high(struct page *page);
 extern void kunmap_high(struct page *page);
-extern void *kmap_atomic_prot(struct page *page, enum km_type type,
-                              pgprot_t prot);
-extern void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
+extern void *kmap_atomic_prot(struct page *page, pgprot_t prot);
+extern void __kunmap_atomic(void *kvaddr);
 
 static inline void *kmap(struct page *page)
 {
@@ -80,9 +79,9 @@ static inline void kunmap(struct page *page)
         kunmap_high(page);
 }
 
-static inline void *kmap_atomic(struct page *page, enum km_type type)
+static inline void *__kmap_atomic(struct page *page)
 {
-        return kmap_atomic_prot(page, type, kmap_prot);
+        return kmap_atomic_prot(page, kmap_prot);
 }
 
 static inline struct page *kmap_atomic_to_page(void *ptr)
diff --git a/arch/powerpc/include/asm/pgtable-ppc32.h b/arch/powerpc/include/asm/pgtable-ppc32.h
index a7db96f2b5c3..47edde8c3556 100644
--- a/arch/powerpc/include/asm/pgtable-ppc32.h
+++ b/arch/powerpc/include/asm/pgtable-ppc32.h
@@ -308,12 +308,8 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry)
 #define pte_offset_kernel(dir, addr)    \
         ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(addr))
 #define pte_offset_map(dir, addr)               \
-        ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE0) + pte_index(addr))
-#define pte_offset_map_nested(dir, addr)        \
-        ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE1) + pte_index(addr))
-
-#define pte_unmap(pte)          kunmap_atomic(pte, KM_PTE0)
-#define pte_unmap_nested(pte)   kunmap_atomic(pte, KM_PTE1)
+        ((pte_t *) kmap_atomic(pmd_page(*(dir))) + pte_index(addr))
+#define pte_unmap(pte)          kunmap_atomic(pte)
 
 /*
  * Encode and decode a swap entry.
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h
index 49865045d56f..2b09cd522d33 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64.h
@@ -193,9 +193,7 @@
   (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 
 #define pte_offset_map(dir,addr)        pte_offset_kernel((dir), (addr))
-#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
 #define pte_unmap(pte)                  do { } while(0)
-#define pte_unmap_nested(pte)           do { } while(0)
 
 /* to find an entry in a kernel page-table-directory */
 /* This now only contains the vmalloc pages */
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index d692989a4318..441d2a722f06 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -238,9 +238,7 @@ static inline void vio_cmo_dealloc(struct vio_dev *viodev, size_t size)
          * memory in this pool does not change.
          */
         if (spare_needed && reserve_freed) {
-                tmp = min(spare_needed, min(reserve_freed,
-                                            (viodev->cmo.entitled -
-                                             VIO_CMO_MIN_ENT)));
+                tmp = min3(spare_needed, reserve_freed, (viodev->cmo.entitled - VIO_CMO_MIN_ENT));
 
                 vio_cmo.spare += tmp;
                 viodev->cmo.entitled -= tmp;
diff --git a/arch/powerpc/mm/highmem.c b/arch/powerpc/mm/highmem.c
index 857d4173f9c6..b0848b462bbc 100644
--- a/arch/powerpc/mm/highmem.c
+++ b/arch/powerpc/mm/highmem.c
@@ -29,17 +29,17 @@
  * be used in IRQ contexts, so in some (very limited) cases we need
  * it.
  */
-void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
+void *kmap_atomic_prot(struct page *page, pgprot_t prot)
 {
-        unsigned int idx;
         unsigned long vaddr;
+        int idx, type;
 
         /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
         pagefault_disable();
         if (!PageHighMem(page))
                 return page_address(page);
 
-        debug_kmap_atomic(type);
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR*smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #ifdef CONFIG_DEBUG_HIGHMEM
@@ -52,26 +52,33 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
 }
 EXPORT_SYMBOL(kmap_atomic_prot);
 
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+void __kunmap_atomic(void *kvaddr)
 {
-#ifdef CONFIG_DEBUG_HIGHMEM
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
+        int type;
 
         if (vaddr < __fix_to_virt(FIX_KMAP_END)) {
                 pagefault_enable();
                 return;
         }
 
-        BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
+        type = kmap_atomic_idx_pop();
 
-        /*
-         * force other mappings to Oops if they'll try to access
-         * this pte without first remap it
-         */
-        pte_clear(&init_mm, vaddr, kmap_pte-idx);
-        local_flush_tlb_page(NULL, vaddr);
+#ifdef CONFIG_DEBUG_HIGHMEM
+        {
+                unsigned int idx;
+
+                idx = type + KM_TYPE_NR * smp_processor_id();
+                BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
+
+                /*
+                 * force other mappings to Oops if they'll try to access
+                 * this pte without first remap it
+                 */
+                pte_clear(&init_mm, vaddr, kmap_pte-idx);
+                local_flush_tlb_page(NULL, vaddr);
+        }
 #endif
         pagefault_enable();
 }
-EXPORT_SYMBOL(kunmap_atomic_notypecheck);
+EXPORT_SYMBOL(__kunmap_atomic);
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 986dc9476c21..02ace3491c51 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1094,9 +1094,7 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
 #define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr))
 #define pte_offset_kernel(pmd, address) pte_offset(pmd,address)
 #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
-#define pte_offset_map_nested(pmd, address) pte_offset_kernel(pmd, address)
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 
 /*
  * 31 bit swap entry format:
diff --git a/arch/score/include/asm/pgtable.h b/arch/score/include/asm/pgtable.h
index ccf38f06c57d..2fd469807683 100644
--- a/arch/score/include/asm/pgtable.h
+++ b/arch/score/include/asm/pgtable.h
@@ -88,10 +88,7 @@ static inline void pmd_clear(pmd_t *pmdp)
 
 #define pte_offset_map(dir, address)    \
         ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
-#define pte_offset_map_nested(dir, address)     \
-        ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
 #define pte_unmap(pte) ((void)(pte))
-#define pte_unmap_nested(pte) ((void)(pte))
 
 /*
  * Bits 9(_PAGE_PRESENT) and 10(_PAGE_FILE)are taken,
diff --git a/arch/sh/include/asm/pgtable_32.h b/arch/sh/include/asm/pgtable_32.h
index e172d696e52b..69fdfbf14ea5 100644
--- a/arch/sh/include/asm/pgtable_32.h
+++ b/arch/sh/include/asm/pgtable_32.h
@@ -429,10 +429,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 #define pte_offset_kernel(dir, address) \
         ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
 #define pte_offset_map(dir, address)            pte_offset_kernel(dir, address)
-#define pte_offset_map_nested(dir, address)     pte_offset_kernel(dir, address)
-
 #define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
 
 #ifdef CONFIG_X2TLB
 #define pte_ERROR(e) \
diff --git a/arch/sh/include/asm/pgtable_64.h b/arch/sh/include/asm/pgtable_64.h
index 0ee46776dad6..10a48111226d 100644
--- a/arch/sh/include/asm/pgtable_64.h
+++ b/arch/sh/include/asm/pgtable_64.h
@@ -84,9 +84,7 @@ static __inline__ void set_pte(pte_t *pteptr, pte_t pteval)
                 ((pte_t *) ((pmd_val(*(dir))) & PAGE_MASK) + pte_index((addr)))
 
 #define pte_offset_map(dir,addr)        pte_offset_kernel(dir, addr)
-#define pte_offset_map_nested(dir,addr) pte_offset_kernel(dir, addr)
 #define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
 
 #ifndef __ASSEMBLY__
 #define IOBASE_VADDR    0xff000000
diff --git a/arch/sparc/include/asm/highmem.h b/arch/sparc/include/asm/highmem.h
index ec23b0a87b98..3d7afbb7f4bb 100644
--- a/arch/sparc/include/asm/highmem.h
+++ b/arch/sparc/include/asm/highmem.h
@@ -70,8 +70,8 @@ static inline void kunmap(struct page *page)
         kunmap_high(page);
 }
 
-extern void *kmap_atomic(struct page *page, enum km_type type);
-extern void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
+extern void *__kmap_atomic(struct page *page);
+extern void __kunmap_atomic(void *kvaddr);
 extern struct page *kmap_atomic_to_page(void *vaddr);
 
 #define flush_cache_kmaps()     flush_cache_all()
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index 0ece77f47753..303bd4dc8292 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -304,10 +304,7 @@ BTFIXUPDEF_CALL(pte_t *, pte_offset_kernel, pmd_t *, unsigned long)
  * and sun4c is guaranteed to have no highmem anyway.
  */
 #define pte_offset_map(d, a)            pte_offset_kernel(d,a)
-#define pte_offset_map_nested(d, a)     pte_offset_kernel(d,a)
-
 #define pte_unmap(pte)          do{}while(0)
-#define pte_unmap_nested(pte)   do{}while(0)
 
 /* Certain architectures need to do special things when pte's
  * within a page table are directly modified.  Thus, the following
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index f5b5fa76c02d..f8dddb7045bb 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -652,9 +652,7 @@ static inline int pte_special(pte_t pte)
          ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 #define pte_offset_kernel               pte_index
 #define pte_offset_map                  pte_index
-#define pte_offset_map_nested           pte_index
 #define pte_unmap(pte)                  do { } while (0)
-#define pte_unmap_nested(pte)           do { } while (0)
 
 /* Actual page table PTE updates.  */
 extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig);
diff --git a/arch/sparc/mm/highmem.c b/arch/sparc/mm/highmem.c
index e139e9cbf5f7..5e50c09b7dce 100644
--- a/arch/sparc/mm/highmem.c
+++ b/arch/sparc/mm/highmem.c
@@ -29,17 +29,17 @@
 #include <asm/tlbflush.h>
 #include <asm/fixmap.h>
 
-void *kmap_atomic(struct page *page, enum km_type type)
+void *__kmap_atomic(struct page *page)
 {
-        unsigned long idx;
         unsigned long vaddr;
+        long idx, type;
 
         /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
         pagefault_disable();
         if (!PageHighMem(page))
                 return page_address(page);
 
-        debug_kmap_atomic(type);
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR*smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 
@@ -63,44 +63,50 @@ void *kmap_atomic(struct page *page, enum km_type type)
 
         return (void*) vaddr;
 }
-EXPORT_SYMBOL(kmap_atomic);
+EXPORT_SYMBOL(__kmap_atomic);
 
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+void __kunmap_atomic(void *kvaddr)
 {
-#ifdef CONFIG_DEBUG_HIGHMEM
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        unsigned long idx = type + KM_TYPE_NR*smp_processor_id();
+        int type;
 
         if (vaddr < FIXADDR_START) { // FIXME
                 pagefault_enable();
                 return;
         }
 
-        BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx));
+        type = kmap_atomic_idx_pop();
 
-/* XXX Fix - Anton */
+#ifdef CONFIG_DEBUG_HIGHMEM
+        {
+                unsigned long idx;
+
+                idx = type + KM_TYPE_NR * smp_processor_id();
+                BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx));
+
+                /* XXX Fix - Anton */
 #if 0
-        __flush_cache_one(vaddr);
+                __flush_cache_one(vaddr);
 #else
-        flush_cache_all();
+                flush_cache_all();
 #endif
 
-        /*
-         * force other mappings to Oops if they'll try to access
-         * this pte without first remap it
-         */
-        pte_clear(&init_mm, vaddr, kmap_pte-idx);
-/* XXX Fix - Anton */
+                /*
+                 * force other mappings to Oops if they'll try to access
+                 * this pte without first remap it
+                 */
+                pte_clear(&init_mm, vaddr, kmap_pte-idx);
+                /* XXX Fix - Anton */
 #if 0
-        __flush_tlb_one(vaddr);
+                __flush_tlb_one(vaddr);
 #else
-        flush_tlb_all();
+                flush_tlb_all();
 #endif
+        }
 #endif
-
         pagefault_enable();
 }
-EXPORT_SYMBOL(kunmap_atomic_notypecheck);
+EXPORT_SYMBOL(__kunmap_atomic);
 
 /* We may be fed a pagetable here by ptep_to_xxx and others. */
 struct page *kmap_atomic_to_page(void *ptr)
diff --git a/arch/tile/include/asm/highmem.h b/arch/tile/include/asm/highmem.h
index d155db6fa9bd..e0f7ee186721 100644
--- a/arch/tile/include/asm/highmem.h
+++ b/arch/tile/include/asm/highmem.h
@@ -60,12 +60,12 @@ void *kmap_fix_kpte(struct page *page, int finished);
 /* This macro is used only in map_new_virtual() to map "page". */
 #define kmap_prot page_to_kpgprot(page)
 
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
-void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
-void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot);
+void *__kmap_atomic(struct page *page);
+void __kunmap_atomic(void *kvaddr);
+void *kmap_atomic_pfn(unsigned long pfn);
+void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
 struct page *kmap_atomic_to_page(void *ptr);
-void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot);
-void *kmap_atomic(struct page *page, enum km_type type);
+void *kmap_atomic_prot(struct page *page, pgprot_t prot);
 void kmap_atomic_fix_kpte(struct page *page, int finished);
 
 #define flush_cache_kmaps()     do { } while (0)
diff --git a/arch/tile/include/asm/pgtable.h b/arch/tile/include/asm/pgtable.h
index b3367379d537..dc4ccdd855bc 100644
--- a/arch/tile/include/asm/pgtable.h
+++ b/arch/tile/include/asm/pgtable.h
@@ -347,15 +347,10 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 extern pte_t *_pte_offset_map(pmd_t *, unsigned long address, enum km_type);
 #define pte_offset_map(dir, address) \
         _pte_offset_map(dir, address, KM_PTE0)
-#define pte_offset_map_nested(dir, address) \
-        _pte_offset_map(dir, address, KM_PTE1)
 #define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
-#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
 #else
 #define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 #endif
 
 /* Clear a non-executable kernel PTE and flush it from the TLB. */
diff --git a/arch/tile/mm/highmem.c b/arch/tile/mm/highmem.c
index 12ab137e7d4f..8ef6595e162c 100644
--- a/arch/tile/mm/highmem.c
+++ b/arch/tile/mm/highmem.c
@@ -56,50 +56,6 @@ void kunmap(struct page *page)
 }
 EXPORT_SYMBOL(kunmap);
 
-static void debug_kmap_atomic_prot(enum km_type type)
-{
-#ifdef CONFIG_DEBUG_HIGHMEM
-        static unsigned warn_count = 10;
-
-        if (unlikely(warn_count == 0))
-                return;
-
-        if (unlikely(in_interrupt())) {
-                if (in_irq()) {
-                        if (type != KM_IRQ0 && type != KM_IRQ1 &&
-                            type != KM_BIO_SRC_IRQ &&
-                            /* type != KM_BIO_DST_IRQ && */
-                            type != KM_BOUNCE_READ) {
-                                WARN_ON(1);
-                                warn_count--;
-                        }
-                } else if (!irqs_disabled()) {  /* softirq */
-                        if (type != KM_IRQ0 && type != KM_IRQ1 &&
-                            type != KM_SOFTIRQ0 && type != KM_SOFTIRQ1 &&
-                            type != KM_SKB_SUNRPC_DATA &&
-                            type != KM_SKB_DATA_SOFTIRQ &&
-                            type != KM_BOUNCE_READ) {
-                                WARN_ON(1);
-                                warn_count--;
-                        }
-                }
-        }
-
-        if (type == KM_IRQ0 || type == KM_IRQ1 || type == KM_BOUNCE_READ ||
-            type == KM_BIO_SRC_IRQ /* || type == KM_BIO_DST_IRQ */) {
-                if (!irqs_disabled()) {
-                        WARN_ON(1);
-                        warn_count--;
-                }
-        } else if (type == KM_SOFTIRQ0 || type == KM_SOFTIRQ1) {
-                if (irq_count() == 0 && !irqs_disabled()) {
-                        WARN_ON(1);
-                        warn_count--;
-                }
-        }
-#endif
-}
-
 /*
  * Describe a single atomic mapping of a page on a given cpu at a
  * given address, and allow it to be linked into a list.
@@ -240,10 +196,10 @@ void kmap_atomic_fix_kpte(struct page *page, int finished)
  * When holding an atomic kmap is is not legal to sleep, so atomic
  * kmaps are appropriate for short, tight code paths only.
  */
-void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
+void *kmap_atomic_prot(struct page *page, pgprot_t prot)
 {
-        enum fixed_addresses idx;
         unsigned long vaddr;
+        int idx, type;
         pte_t *pte;
 
         /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
@@ -255,8 +211,7 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
         if (!PageHighMem(page))
                 return page_address(page);
 
-        debug_kmap_atomic_prot(type);
-
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR*smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
         pte = kmap_get_pte(vaddr);
@@ -269,25 +224,31 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
 }
 EXPORT_SYMBOL(kmap_atomic_prot);
 
-void *kmap_atomic(struct page *page, enum km_type type)
+void *__kmap_atomic(struct page *page)
 {
         /* PAGE_NONE is a magic value that tells us to check immutability. */
         return kmap_atomic_prot(page, type, PAGE_NONE);
 }
-EXPORT_SYMBOL(kmap_atomic);
+EXPORT_SYMBOL(__kmap_atomic);
 
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+void __kunmap_atomic(void *kvaddr)
 {
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
 
-        /*
-         * Force other mappings to Oops if they try to access this pte without
-         * first remapping it.  Keeping stale mappings around is a bad idea.
-         */
-        if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx)) {
+        if (vaddr >= __fix_to_virt(FIX_KMAP_END) &&
+            vaddr <= __fix_to_virt(FIX_KMAP_BEGIN)) {
                 pte_t *pte = kmap_get_pte(vaddr);
                 pte_t pteval = *pte;
+                int idx, type;
+
+                type = kmap_atomic_idx_pop();
+                idx = type + KM_TYPE_NR*smp_processor_id();
+
+                /*
+                 * Force other mappings to Oops if they try to access this pte
+                 * without first remapping it.  Keeping stale mappings around
+                 * is a bad idea.
+                 */
                 BUG_ON(!pte_present(pteval) && !pte_migrating(pteval));
                 kmap_atomic_unregister(pte_page(pteval), vaddr);
                 kpte_clear_flush(pte, vaddr);
@@ -300,19 +261,19 @@ void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
         arch_flush_lazy_mmu_mode();
         pagefault_enable();
 }
-EXPORT_SYMBOL(kunmap_atomic_notypecheck);
+EXPORT_SYMBOL(__kunmap_atomic);
 
 /*
  * This API is supposed to allow us to map memory without a "struct page".
  * Currently we don't support this, though this may change in the future.
  */
-void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
+void *kmap_atomic_pfn(unsigned long pfn)
 {
-        return kmap_atomic(pfn_to_page(pfn), type);
+        return kmap_atomic(pfn_to_page(pfn));
 }
-void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
+void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot)
 {
-        return kmap_atomic_prot(pfn_to_page(pfn), type, prot);
+        return kmap_atomic_prot(pfn_to_page(pfn), prot);
 }
 
 struct page *kmap_atomic_to_page(void *ptr)
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um
index ec2b8da1aba4..50d6aa20c353 100644
--- a/arch/um/Kconfig.um
+++ b/arch/um/Kconfig.um
@@ -120,6 +120,9 @@ config SMP
 
           If you don't know what to do, say N.
 
+config GENERIC_HARDIRQS_NO__DO_IRQ
+        def_bool y
+
 config NR_CPUS
         int "Maximum number of CPUs (2-32)"
         range 2 32
@@ -147,3 +150,6 @@ config KERNEL_STACK_ORDER
           This option determines the size of UML kernel stacks.  They will
           be 1 << order pages.  The default is OK unless you're running Valgrind
           on UML, in which case, set this to 3.
+
+config NO_DMA
+        def_bool y
diff --git a/arch/um/defconfig b/arch/um/defconfig
index 6bd456f96f90..564f3de65b4a 100644
--- a/arch/um/defconfig
+++ b/arch/um/defconfig
@@ -566,7 +566,6 @@ CONFIG_CRC32=m
 # CONFIG_CRC7 is not set
 # CONFIG_LIBCRC32C is not set
 CONFIG_PLIST=y
-CONFIG_HAS_DMA=y
 
 #
 # SCSI device support
diff --git a/arch/um/include/asm/dma-mapping.h b/arch/um/include/asm/dma-mapping.h
deleted file mode 100644
index 1f469e80fdd3..000000000000
--- a/arch/um/include/asm/dma-mapping.h
+++ /dev/null
@@ -1,112 +0,0 @@
-#ifndef _ASM_DMA_MAPPING_H
-#define _ASM_DMA_MAPPING_H
-
-#include <asm/scatterlist.h>
-
-static inline int
-dma_supported(struct device *dev, u64 mask)
-{
-        BUG();
-        return(0);
-}
-
-static inline int
-dma_set_mask(struct device *dev, u64 dma_mask)
-{
-        BUG();
-        return(0);
-}
-
-static inline void *
-dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
-                   gfp_t flag)
-{
-        BUG();
-        return((void *) 0);
-}
-
-static inline void
-dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
-                  dma_addr_t dma_handle)
-{
-        BUG();
-}
-
-static inline dma_addr_t
-dma_map_single(struct device *dev, void *cpu_addr, size_t size,
-               enum dma_data_direction direction)
-{
-        BUG();
-        return(0);
-}
-
-static inline void
-dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
-                 enum dma_data_direction direction)
-{
-        BUG();
-}
-
-static inline dma_addr_t
-dma_map_page(struct device *dev, struct page *page,
-             unsigned long offset, size_t size,
-             enum dma_data_direction direction)
-{
-        BUG();
-        return(0);
-}
-
-static inline void
-dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
-               enum dma_data_direction direction)
-{
-        BUG();
-}
-
-static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-           enum dma_data_direction direction)
-{
-        BUG();
-        return(0);
-}
-
-static inline void
-dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
-             enum dma_data_direction direction)
-{
-        BUG();
-}
-
-static inline void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
-                enum dma_data_direction direction)
-{
-        BUG();
-}
-
-static inline void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
-            enum dma_data_direction direction)
-{
-        BUG();
-}
-
-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-
-static inline void
-dma_cache_sync(struct device *dev, void *vaddr, size_t size,
-               enum dma_data_direction direction)
-{
-        BUG();
-}
-
-static inline int
-dma_mapping_error(struct device *dev, dma_addr_t dma_handle)
-{
-        BUG();
-        return 0;
-}
-
-#endif
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index a9f7251b4a8d..41474fb5eee7 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -338,9 +338,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
         ((pte_t *) pmd_page_vaddr(*(dir)) +  pte_index(address))
 #define pte_offset_map(dir, address) \
         ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 
 struct mm_struct;
 extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
diff --git a/arch/um/include/asm/system.h b/arch/um/include/asm/system.h
index 93af1cf0907d..68a90ecd1450 100644
--- a/arch/um/include/asm/system.h
+++ b/arch/um/include/asm/system.h
@@ -8,23 +8,38 @@ extern int set_signals(int enable);
 extern void block_signals(void);
 extern void unblock_signals(void);
 
-#define local_save_flags(flags) do { typecheck(unsigned long, flags); \
-                                     (flags) = get_signals(); } while(0)
-#define local_irq_restore(flags) do { typecheck(unsigned long, flags); \
-                                      set_signals(flags); } while(0)
-
-#define local_irq_save(flags) do { local_save_flags(flags); \
-                                   local_irq_disable(); } while(0)
-
-#define local_irq_enable() unblock_signals()
-#define local_irq_disable() block_signals()
-
-#define irqs_disabled()                 \
-({                                      \
-        unsigned long flags;            \
-        local_save_flags(flags);        \
-        (flags == 0);                   \
-})
+static inline unsigned long arch_local_save_flags(void)
+{
+        return get_signals();
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+        set_signals(flags);
+}
+
+static inline void arch_local_irq_enable(void)
+{
+        unblock_signals();
+}
+
+static inline void arch_local_irq_disable(void)
+{
+        block_signals();
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+        unsigned long flags;
+        flags = arch_local_save_flags();
+        arch_local_irq_disable();
+        return flags;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+        return arch_local_save_flags() == 0;
+}
 
 extern void *_switch_to(void *prev, void *next, void *last);
 #define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 69268014dd8e..a3cab6d3ae02 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -50,8 +50,18 @@ SECTIONS
   .rela.got       : { *(.rela.got) }
   .rel.bss        : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
   .rela.bss       : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
-  .rel.plt        : { *(.rel.plt) }
-  .rela.plt       : { *(.rela.plt) }
+  .rel.plt : {
+        *(.rel.plt)
+        PROVIDE_HIDDEN(__rel_iplt_start = .);
+        *(.rel.iplt)
+        PROVIDE_HIDDEN(__rel_iplt_end = .);
+  }
+  .rela.plt : {
+        *(.rela.plt)
+        PROVIDE_HIDDEN(__rela_iplt_start = .);
+        *(.rela.iplt)
+        PROVIDE_HIDDEN(__rela_iplt_end = .);
+  }
   .init           : {
     KEEP (*(.init))
   } =0x90909090
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index a746e3037a5b..3f0ac9e0c966 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -334,7 +334,7 @@ unsigned int do_IRQ(int irq, struct uml_pt_regs *regs)
 {
         struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs);
         irq_enter();
-        __do_IRQ(irq);
+        generic_handle_irq(irq);
         irq_exit();
         set_irq_regs(old_regs);
         return 1;
@@ -391,17 +391,10 @@ void __init init_IRQ(void)
 {
         int i;
 
-        irq_desc[TIMER_IRQ].status = IRQ_DISABLED;
-        irq_desc[TIMER_IRQ].action = NULL;
-        irq_desc[TIMER_IRQ].depth = 1;
-        irq_desc[TIMER_IRQ].chip = &SIGVTALRM_irq_type;
-        enable_irq(TIMER_IRQ);
+        set_irq_chip_and_handler(TIMER_IRQ, &SIGVTALRM_irq_type, handle_edge_irq);
+
         for (i = 1; i < NR_IRQS; i++) {
-                irq_desc[i].status = IRQ_DISABLED;
-                irq_desc[i].action = NULL;
-                irq_desc[i].depth = 1;
-                irq_desc[i].chip = &normal_irq_type;
-                enable_irq(i);
+                set_irq_chip_and_handler(i, &normal_irq_type, handle_edge_irq);
         }
 }
 
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index ec6378550671..fbd99402d4d2 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -22,7 +22,7 @@ SECTIONS
   _text = .;
   _stext = .;
   __init_begin = .;
-  INIT_TEXT_SECTION(PAGE_SIZE)
+  INIT_TEXT_SECTION(0)
   . = ALIGN(PAGE_SIZE);
 
   .text      :
@@ -43,6 +43,23 @@ SECTIONS
         __syscall_stub_end = .;
   }
 
+  /*
+   * These are needed even in a static link, even if they wind up being empty.
+   * Newer glibc needs these __rel{,a}_iplt_{start,end} symbols.
+   */
+  .rel.plt : {
+        *(.rel.plt)
+        PROVIDE_HIDDEN(__rel_iplt_start = .);
+        *(.rel.iplt)
+        PROVIDE_HIDDEN(__rel_iplt_end = .);
+  }
+  .rela.plt : {
+        *(.rela.plt)
+        PROVIDE_HIDDEN(__rela_iplt_start = .);
+        *(.rela.iplt)
+        PROVIDE_HIDDEN(__rela_iplt_end = .);
+  }
+
   #include "asm/common.lds.S"
 
   init.data : { INIT_DATA }
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index dec5678fc17f..6e3359d6a839 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -60,7 +60,7 @@ static inline long long timeval_to_ns(const struct timeval *tv)
 long long disable_timer(void)
 {
         struct itimerval time = ((struct itimerval) { { 0, 0 }, { 0, 0 } });
-        int remain, max = UM_NSEC_PER_SEC / UM_HZ;
+        long long remain, max = UM_NSEC_PER_SEC / UM_HZ;
 
         if (setitimer(ITIMER_VIRTUAL, &time, &time) < 0)
                 printk(UM_KERN_ERR "disable_timer - setitimer failed, "
diff --git a/arch/x86/include/asm/highmem.h b/arch/x86/include/asm/highmem.h
index 8caac76ac324..3bd04022fd0c 100644
--- a/arch/x86/include/asm/highmem.h
+++ b/arch/x86/include/asm/highmem.h
@@ -59,11 +59,12 @@ extern void kunmap_high(struct page *page);
 
 void *kmap(struct page *page);
 void kunmap(struct page *page);
-void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot);
-void *kmap_atomic(struct page *page, enum km_type type);
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type);
-void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
-void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot);
+
+void *kmap_atomic_prot(struct page *page, pgprot_t prot);
+void *__kmap_atomic(struct page *page);
+void __kunmap_atomic(void *kvaddr);
+void *kmap_atomic_pfn(unsigned long pfn);
+void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
 struct page *kmap_atomic_to_page(void *ptr);
 
 #define flush_cache_kmaps()     do { } while (0)
diff --git a/arch/x86/include/asm/iomap.h b/arch/x86/include/asm/iomap.h
index c4191b3b7056..363e33eb6ec1 100644
--- a/arch/x86/include/asm/iomap.h
+++ b/arch/x86/include/asm/iomap.h
@@ -27,10 +27,10 @@
 #include <asm/tlbflush.h>
 
 void __iomem *
-iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot);
+iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
 
 void
-iounmap_atomic(void __iomem *kvaddr, enum km_type type);
+iounmap_atomic(void __iomem *kvaddr);
 
 int
 iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot);
diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h
index 8abde9ec90bf..0c92113c4cb6 100644
--- a/arch/x86/include/asm/pgtable_32.h
+++ b/arch/x86/include/asm/pgtable_32.h
@@ -49,24 +49,14 @@ extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
 #endif
 
 #if defined(CONFIG_HIGHPTE)
-#define __KM_PTE                        \
-        (in_nmi() ? KM_NMI_PTE :        \
-         in_irq() ? KM_IRQ_PTE :        \
-         KM_PTE0)
 #define pte_offset_map(dir, address)                                    \
-        ((pte_t *)kmap_atomic(pmd_page(*(dir)), __KM_PTE) +             \
+        ((pte_t *)kmap_atomic(pmd_page(*(dir))) +               \
          pte_index((address)))
-#define pte_offset_map_nested(dir, address)                             \
-        ((pte_t *)kmap_atomic(pmd_page(*(dir)), KM_PTE1) +              \
-         pte_index((address)))
-#define pte_unmap(pte) kunmap_atomic((pte), __KM_PTE)
-#define pte_unmap_nested(pte) kunmap_atomic((pte), KM_PTE1)
+#define pte_unmap(pte) kunmap_atomic((pte))
 #else
 #define pte_offset_map(dir, address)                                    \
         ((pte_t *)page_address(pmd_page(*(dir))) + pte_index((address)))
-#define pte_offset_map_nested(dir, address) pte_offset_map((dir), (address))
 #define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
 #endif
 
 /* Clear a kernel PTE and flush it from the TLB */
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index f96ac9bedf75..f86da20347f2 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -127,9 +127,7 @@ static inline int pgd_large(pgd_t pgd) { return 0; }
 
 /* x86-64 always has all page tables mapped. */
 #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address))
-#define pte_offset_map_nested(dir, address) pte_offset_kernel((dir), (address))
 #define pte_unmap(pte) ((void)(pte))/* NOP */
-#define pte_unmap_nested(pte) ((void)(pte)) /* NOP */
 
 #define update_mmu_cache(vma, address, ptep) do { } while (0)
 
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 12cd823c8d03..17ad03366211 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -327,6 +327,7 @@ static void __cpuinit amd_calc_l3_indices(struct amd_l3_cache *l3)
         l3->subcaches[3] = sc3 = !(val & BIT(12)) + !(val & BIT(13));
 
         l3->indices = (max(max(max(sc0, sc1), sc2), sc3) << 10) - 1;
+        l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1;
 }
 
 static struct amd_l3_cache * __cpuinit amd_init_l3_cache(int node)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index fe73c1844a9a..c1e8c7a51164 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -49,7 +49,6 @@ static unsigned long
 copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
 {
         unsigned long offset, addr = (unsigned long)from;
-        int type = in_nmi() ? KM_NMI : KM_IRQ0;
         unsigned long size, len = 0;
         struct page *page;
         void *map;
@@ -63,9 +62,9 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
                 offset = addr & (PAGE_SIZE - 1);
                 size = min(PAGE_SIZE - offset, n - len);
 
-                map = kmap_atomic(page, type);
+                map = kmap_atomic(page);
                 memcpy(to, map+offset, size);
-                kunmap_atomic(map, type);
+                kunmap_atomic(map);
                 put_page(page);
 
                 len  += size;
diff --git a/arch/x86/kernel/crash_dump_32.c b/arch/x86/kernel/crash_dump_32.c
index 67414550c3cc..d5cd13945d5a 100644
--- a/arch/x86/kernel/crash_dump_32.c
+++ b/arch/x86/kernel/crash_dump_32.c
@@ -61,7 +61,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
         if (!is_crashed_pfn_valid(pfn))
                 return -EFAULT;
 
-        vaddr = kmap_atomic_pfn(pfn, KM_PTE0);
+        vaddr = kmap_atomic_pfn(pfn);
 
         if (!userbuf) {
                 memcpy(buf, (vaddr + offset), csize);
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index aff0b3c27509..ae03cab4352e 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -713,7 +713,7 @@ static int hpet_cpuhp_notify(struct notifier_block *n,
 
         switch (action & 0xf) {
         case CPU_ONLINE:
-                INIT_DELAYED_WORK_ON_STACK(&work.work, hpet_work);
+                INIT_DELAYED_WORK_ONSTACK(&work.work, hpet_work);
                 init_completion(&work.complete);
                 /* FIXME: add schedule_work_on() */
                 schedule_delayed_work_on(cpu, &work.work, 0);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 6af118511b4a..6c7faecd9e4a 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -747,7 +747,7 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
                 .done   = COMPLETION_INITIALIZER_ONSTACK(c_idle.done),
         };
 
-        INIT_WORK_ON_STACK(&c_idle.work, do_fork_idle);
+        INIT_WORK_ONSTACK(&c_idle.work, do_fork_idle);
 
         alternatives_smp_switch(1);
 
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 852b319edbdc..7d90ceb882a4 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -919,9 +919,9 @@ spurious_fault(unsigned long error_code, unsigned long address)
 int show_unhandled_signals = 1;
 
 static inline int
-access_error(unsigned long error_code, int write, struct vm_area_struct *vma)
+access_error(unsigned long error_code, struct vm_area_struct *vma)
 {
-        if (write) {
+        if (error_code & PF_WRITE) {
                 /* write, present and write, not present: */
                 if (unlikely(!(vma->vm_flags & VM_WRITE)))
                         return 1;
@@ -956,8 +956,10 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
         struct task_struct *tsk;
         unsigned long address;
         struct mm_struct *mm;
-        int write;
         int fault;
+        int write = error_code & PF_WRITE;
+        unsigned int flags = FAULT_FLAG_ALLOW_RETRY |
+                                        (write ? FAULT_FLAG_WRITE : 0);
 
         tsk = current;
         mm = tsk->mm;
@@ -1068,6 +1070,7 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
                         bad_area_nosemaphore(regs, error_code, address);
                         return;
                 }
+retry:
                 down_read(&mm->mmap_sem);
         } else {
                 /*
@@ -1111,9 +1114,7 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
          * we can handle it..
          */
 good_area:
-        write = error_code & PF_WRITE;
-
-        if (unlikely(access_error(error_code, write, vma))) {
+        if (unlikely(access_error(error_code, vma))) {
                 bad_area_access_error(regs, error_code, address);
                 return;
         }
@@ -1123,21 +1124,34 @@ good_area:
          * make sure we exit gracefully rather than endlessly redo
          * the fault:
          */
-        fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
+        fault = handle_mm_fault(mm, vma, address, flags);
 
         if (unlikely(fault & VM_FAULT_ERROR)) {
                 mm_fault_error(regs, error_code, address, fault);
                 return;
         }
 
-        if (fault & VM_FAULT_MAJOR) {
-                tsk->maj_flt++;
-                perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
-                                     regs, address);
-        } else {
-                tsk->min_flt++;
-                perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
-                                     regs, address);
+        /*
+         * Major/minor page fault accounting is only done on the
+         * initial attempt. If we go through a retry, it is extremely
+         * likely that the page will be found in page cache at that point.
+         */
+        if (flags & FAULT_FLAG_ALLOW_RETRY) {
+                if (fault & VM_FAULT_MAJOR) {
+                        tsk->maj_flt++;
+                        perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
+                                      regs, address);
+                } else {
+                        tsk->min_flt++;
+                        perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
+                                      regs, address);
+                }
+                if (fault & VM_FAULT_RETRY) {
+                        /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
+                         * of starvation. */
+                        flags &= ~FAULT_FLAG_ALLOW_RETRY;
+                        goto retry;
+                }
         }
 
         check_v8086_mode(regs, address, tsk);
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index 5e8fa12ef861..d723e369003c 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -9,6 +9,7 @@ void *kmap(struct page *page)
                 return page_address(page);
         return kmap_high(page);
 }
+EXPORT_SYMBOL(kmap);
 
 void kunmap(struct page *page)
 {
@@ -18,6 +19,7 @@ void kunmap(struct page *page)
                 return;
         kunmap_high(page);
 }
+EXPORT_SYMBOL(kunmap);
 
 /*
  * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because
@@ -27,10 +29,10 @@ void kunmap(struct page *page)
  * However when holding an atomic kmap it is not legal to sleep, so atomic
  * kmaps are appropriate for short, tight code paths only.
  */
-void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
+void *kmap_atomic_prot(struct page *page, pgprot_t prot)
 {
-        enum fixed_addresses idx;
         unsigned long vaddr;
+        int idx, type;
 
         /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
         pagefault_disable();
@@ -38,8 +40,7 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
         if (!PageHighMem(page))
                 return page_address(page);
 
-        debug_kmap_atomic(type);
-
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR*smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
         BUG_ON(!pte_none(*(kmap_pte-idx)));
@@ -47,44 +48,56 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
 
         return (void *)vaddr;
 }
+EXPORT_SYMBOL(kmap_atomic_prot);
+
+void *__kmap_atomic(struct page *page)
+{
+        return kmap_atomic_prot(page, kmap_prot);
+}
+EXPORT_SYMBOL(__kmap_atomic);
 
-void *kmap_atomic(struct page *page, enum km_type type)
+/*
+ * This is the same as kmap_atomic() but can map memory that doesn't
+ * have a struct page associated with it.
+ */
+void *kmap_atomic_pfn(unsigned long pfn)
 {
-        return kmap_atomic_prot(page, type, kmap_prot);
+        return kmap_atomic_prot_pfn(pfn, kmap_prot);
 }
+EXPORT_SYMBOL_GPL(kmap_atomic_pfn);
 
-void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type)
+void __kunmap_atomic(void *kvaddr)
 {
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
-
-        /*
-         * Force other mappings to Oops if they'll try to access this pte
-         * without first remap it.  Keeping stale mappings around is a bad idea
-         * also, in case the page changes cacheability attributes or becomes
-         * a protected page in a hypervisor.
-         */
-        if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx))
+
+        if (vaddr >= __fix_to_virt(FIX_KMAP_END) &&
+            vaddr <= __fix_to_virt(FIX_KMAP_BEGIN)) {
+                int idx, type;
+
+                type = kmap_atomic_idx_pop();
+                idx = type + KM_TYPE_NR * smp_processor_id();
+
+#ifdef CONFIG_DEBUG_HIGHMEM
+                WARN_ON_ONCE(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
+#endif
+                /*
+                 * Force other mappings to Oops if they'll try to access this
+                 * pte without first remap it.  Keeping stale mappings around
+                 * is a bad idea also, in case the page changes cacheability
+                 * attributes or becomes a protected page in a hypervisor.
+                 */
                 kpte_clear_flush(kmap_pte-idx, vaddr);
-        else {
+        }
 #ifdef CONFIG_DEBUG_HIGHMEM
+        else {
                 BUG_ON(vaddr < PAGE_OFFSET);
                 BUG_ON(vaddr >= (unsigned long)high_memory);
-#endif
         }
+#endif
 
         pagefault_enable();
 }
-
-/*
- * This is the same as kmap_atomic() but can map memory that doesn't
- * have a struct page associated with it.
- */
-void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
-{
-        return kmap_atomic_prot_pfn(pfn, type, kmap_prot);
-}
-EXPORT_SYMBOL_GPL(kmap_atomic_pfn); /* temporarily in use by i915 GEM until vmap */
+EXPORT_SYMBOL(__kunmap_atomic);
 
 struct page *kmap_atomic_to_page(void *ptr)
 {
@@ -98,12 +111,6 @@ struct page *kmap_atomic_to_page(void *ptr)
         pte = kmap_pte - (idx - FIX_KMAP_BEGIN);
         return pte_page(*pte);
 }
-
-EXPORT_SYMBOL(kmap);
-EXPORT_SYMBOL(kunmap);
-EXPORT_SYMBOL(kmap_atomic);
-EXPORT_SYMBOL(kunmap_atomic_notypecheck);
-EXPORT_SYMBOL(kmap_atomic_prot);
 EXPORT_SYMBOL(kmap_atomic_to_page);
 
 void __init set_highmem_pages_init(void)
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index 72fc70cf6184..75a3d7f24a2c 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -48,21 +48,20 @@ int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot)
 }
 EXPORT_SYMBOL_GPL(iomap_create_wc);
 
-void
-iomap_free(resource_size_t base, unsigned long size)
+void iomap_free(resource_size_t base, unsigned long size)
 {
         io_free_memtype(base, base + size);
 }
 EXPORT_SYMBOL_GPL(iomap_free);
 
-void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
+void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot)
 {
-        enum fixed_addresses idx;
         unsigned long vaddr;
+        int idx, type;
 
         pagefault_disable();
 
-        debug_kmap_atomic(type);
+        type = kmap_atomic_idx_push();
         idx = type + KM_TYPE_NR * smp_processor_id();
         vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
         set_pte(kmap_pte - idx, pfn_pte(pfn, prot));
@@ -72,10 +71,10 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
 }
 
 /*
- * Map 'pfn' using fixed map 'type' and protections 'prot'
+ * Map 'pfn' using protections 'prot'
  */
 void __iomem *
-iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
+iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot)
 {
         /*
          * For non-PAT systems, promote PAGE_KERNEL_WC to PAGE_KERNEL_UC_MINUS.
@@ -86,24 +85,33 @@ iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
         if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC))
                 prot = PAGE_KERNEL_UC_MINUS;
 
-        return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, type, prot);
+        return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, prot);
 }
 EXPORT_SYMBOL_GPL(iomap_atomic_prot_pfn);
 
 void
-iounmap_atomic(void __iomem *kvaddr, enum km_type type)
+iounmap_atomic(void __iomem *kvaddr)
 {
         unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-        enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
 
-        /*
-         * Force other mappings to Oops if they'll try to access this pte
-         * without first remap it.  Keeping stale mappings around is a bad idea
-         * also, in case the page changes cacheability attributes or becomes
-         * a protected page in a hypervisor.
-         */
-        if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx))
+        if (vaddr >= __fix_to_virt(FIX_KMAP_END) &&
+            vaddr <= __fix_to_virt(FIX_KMAP_BEGIN)) {
+                int idx, type;
+
+                type = kmap_atomic_idx_pop();
+                idx = type + KM_TYPE_NR * smp_processor_id();
+
+#ifdef CONFIG_DEBUG_HIGHMEM
+                WARN_ON_ONCE(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
+#endif
+                /*
+                 * Force other mappings to Oops if they'll try to access this
+                 * pte without first remap it.  Keeping stale mappings around
+                 * is a bad idea also, in case the page changes cacheability
+                 * attributes or becomes a protected page in a hypervisor.
+                 */
                 kpte_clear_flush(kmap_pte-idx, vaddr);
+        }
 
         pagefault_enable();
 }
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 76bf35554117..b03c043ce75b 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -324,10 +324,7 @@ ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 #define pte_offset_kernel(dir,addr)                                     \
         ((pte_t*) pmd_page_vaddr(*(dir)) + pte_index(addr))
 #define pte_offset_map(dir,addr)        pte_offset_kernel((dir),(addr))
-#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir),(addr))
-
 #define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
 
 
 /*
diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index 0ec1fb69d4ea..518c22bd9562 100644
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -83,8 +83,8 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
 
                 memcpy(dest_buf, src_buf, len);
 
-                kunmap_atomic(dest_buf, KM_USER0);
                 kunmap_atomic(src_buf, KM_USER1);
+                kunmap_atomic(dest_buf, KM_USER0);
 
                 async_tx_sync_epilog(submit);
         }
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 90d26c91f4e9..7a7219266e3c 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -89,9 +89,9 @@ static inline unsigned int blkcipher_done_fast(struct blkcipher_walk *walk,
                 memcpy(walk->dst.virt.addr, walk->page, n);
                 blkcipher_unmap_dst(walk);
         } else if (!(walk->flags & BLKCIPHER_WALK_PHYS)) {
-                blkcipher_unmap_src(walk);
                 if (walk->flags & BLKCIPHER_WALK_DIFF)
                         blkcipher_unmap_dst(walk);
+                blkcipher_unmap_src(walk);
         }
 
         scatterwalk_advance(&walk->in, n);
diff --git a/drivers/base/node.c b/drivers/base/node.c
index ee53558b452f..ce012a9c6201 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -160,6 +160,18 @@ static ssize_t node_read_numastat(struct sys_device * dev,
 }
 static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
 
+static ssize_t node_read_vmstat(struct sys_device *dev,
+                                struct sysdev_attribute *attr, char *buf)
+{
+        int nid = dev->id;
+        return sprintf(buf,
+                "nr_written %lu\n"
+                "nr_dirtied %lu\n",
+                node_page_state(nid, NR_WRITTEN),
+                node_page_state(nid, NR_DIRTIED));
+}
+static SYSDEV_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL);
+
 static ssize_t node_read_distance(struct sys_device * dev,
                         struct sysdev_attribute *attr, char * buf)
 {
@@ -243,6 +255,7 @@ int register_node(struct node *node, int num, struct node *parent)
                 sysdev_create_file(&node->sysdev, &attr_meminfo);
                 sysdev_create_file(&node->sysdev, &attr_numastat);
                 sysdev_create_file(&node->sysdev, &attr_distance);
+                sysdev_create_file(&node->sysdev, &attr_vmstat);
 
                 scan_unevictable_register_node(node);
 
@@ -267,6 +280,7 @@ void unregister_node(struct node *node)
         sysdev_remove_file(&node->sysdev, &attr_meminfo);
         sysdev_remove_file(&node->sysdev, &attr_numastat);
         sysdev_remove_file(&node->sysdev, &attr_distance);
+        sysdev_remove_file(&node->sysdev, &attr_vmstat);
 
         scan_unevictable_unregister_node(node);
         hugetlb_unregister_node(node);          /* no-op, if memoryless node */
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6c48b3545f84..450c958b514f 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -101,8 +101,8 @@ static int transfer_none(struct loop_device *lo, int cmd,
         else
                 memcpy(raw_buf, loop_buf, size);
 
-        kunmap_atomic(raw_buf, KM_USER0);
         kunmap_atomic(loop_buf, KM_USER1);
+        kunmap_atomic(raw_buf, KM_USER0);
         cond_resched();
         return 0;
 }
@@ -130,8 +130,8 @@ static int transfer_xor(struct loop_device *lo, int cmd,
         for (i = 0; i < size; i++)
                 *out++ = *in++ ^ key[(i & 511) % keysize];
 
-        kunmap_atomic(raw_buf, KM_USER0);
         kunmap_atomic(loop_buf, KM_USER1);
+        kunmap_atomic(raw_buf, KM_USER0);
         cond_resched();
         return 0;
 }
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index a4eee324eb1e..55b8667f739f 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -32,12 +32,12 @@
 #include <linux/bitops.h>
 #include <linux/compat.h>
 #include <linux/clocksource.h>
+#include <linux/uaccess.h>
 #include <linux/slab.h>
+#include <linux/io.h>
 
 #include <asm/current.h>
-#include <asm/uaccess.h>
 #include <asm/system.h>
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/div64.h>
 
@@ -81,13 +81,13 @@ static cycle_t read_hpet(struct clocksource *cs)
 }
 
 static struct clocksource clocksource_hpet = {
-        .name           = "hpet",
-        .rating         = 250,
-        .read           = read_hpet,
-        .mask           = CLOCKSOURCE_MASK(64),
-        .mult           = 0, /* to be calculated */
-        .shift          = 10,
-        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
+        .name           = "hpet",
+        .rating         = 250,
+        .read           = read_hpet,
+        .mask           = CLOCKSOURCE_MASK(64),
+        .mult           = 0,            /* to be calculated */
+        .shift          = 10,
+        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 static struct clocksource *hpet_clocksource;
 #endif
@@ -465,6 +465,21 @@ static int hpet_ioctl_ieon(struct hpet_dev *devp)
         if (irq) {
                 unsigned long irq_flags;
 
+                if (devp->hd_flags & HPET_SHARED_IRQ) {
+                        /*
+                         * To prevent the interrupt handler from seeing an
+                         * unwanted interrupt status bit, program the timer
+                         * so that it will not fire in the near future ...
+                         */
+                        writel(readl(&timer->hpet_config) & ~Tn_TYPE_CNF_MASK,
+                               &timer->hpet_config);
+                        write_counter(read_counter(&hpet->hpet_mc),
+                                      &timer->hpet_compare);
+                        /* ... and clear any left-over status. */
+                        isr = 1 << (devp - devp->hd_hpets->hp_dev);
+                        writel(isr, &hpet->hpet_isr);
+                }
+
                 sprintf(devp->hd_name, "hpet%d", (int)(devp - hpetp->hp_dev));
                 irq_flags = devp->hd_flags & HPET_SHARED_IRQ
                                                 ? IRQF_SHARED : IRQF_DISABLED;
@@ -581,11 +596,10 @@ hpet_ioctl_common(struct hpet_dev *devp, int cmd, unsigned long arg,
                 break;
         case HPET_INFO:
                 {
+                        memset(info, 0, sizeof(*info));
                         if (devp->hd_ireqfreq)
                                 info->hi_ireqfreq =
                                         hpet_time_div(hpetp, devp->hd_ireqfreq);
-                        else
-                                info->hi_ireqfreq = 0;
                         info->hi_flags =
                             readq(&timer->hpet_config) & Tn_PER_INT_CAP_MASK;
                         info->hi_hpet = hpetp->hp_which;
@@ -811,7 +825,7 @@ int hpet_alloc(struct hpet_data *hdp)
         struct hpets *hpetp;
         size_t siz;
         struct hpet __iomem *hpet;
-        static struct hpets *last = NULL;
+        static struct hpets *last;
         unsigned long period;
         unsigned long long temp;
         u32 remainder;
@@ -1000,6 +1014,8 @@ static int hpet_acpi_add(struct acpi_device *device)
                 return -ENODEV;
 
         if (!data.hd_address || !data.hd_nirqs) {
+                if (data.hd_address)
+                        iounmap(data.hd_address);
                 printk("%s: no address or irqs in _CRS\n", __func__);
                 return -ENODEV;
         }
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index e537610d2f09..b293d57d30a7 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1665,6 +1665,17 @@ static int check_hotmod_int_op(const char *curr, const char *option,
         return 0;
 }
 
+static struct smi_info *smi_info_alloc(void)
+{
+        struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
+
+        if (info) {
+                spin_lock_init(&info->si_lock);
+                spin_lock_init(&info->msg_lock);
+        }
+        return info;
+}
+
 static int hotmod_handler(const char *val, struct kernel_param *kp)
 {
         char *str = kstrdup(val, GFP_KERNEL);
@@ -1779,7 +1790,7 @@ static int hotmod_handler(const char *val, struct kernel_param *kp)
                 }
 
                 if (op == HM_ADD) {
-                        info = kzalloc(sizeof(*info), GFP_KERNEL);
+                        info = smi_info_alloc();
                         if (!info) {
                                 rv = -ENOMEM;
                                 goto out;
@@ -1844,7 +1855,7 @@ static __devinit void hardcode_find_bmc(void)
                 if (!ports[i] && !addrs[i])
                         continue;
 
-                info = kzalloc(sizeof(*info), GFP_KERNEL);
+                info = smi_info_alloc();
                 if (!info)
                         return;
 
@@ -2027,7 +2038,7 @@ static __devinit int try_init_spmi(struct SPMITable *spmi)
                 return -ENODEV;
         }
 
-        info = kzalloc(sizeof(*info), GFP_KERNEL);
+        info = smi_info_alloc();
         if (!info) {
                 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
                 return -ENOMEM;
@@ -2137,7 +2148,7 @@ static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
         if (!acpi_dev)
                 return -ENODEV;
 
-        info = kzalloc(sizeof(*info), GFP_KERNEL);
+        info = smi_info_alloc();
         if (!info)
                 return -ENOMEM;
 
@@ -2318,7 +2329,7 @@ static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 {
         struct smi_info *info;
 
-        info = kzalloc(sizeof(*info), GFP_KERNEL);
+        info = smi_info_alloc();
         if (!info) {
                 printk(KERN_ERR PFX "Could not allocate SI data\n");
                 return;
@@ -2425,7 +2436,7 @@ static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
         int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
         struct smi_info *info;
 
-        info = kzalloc(sizeof(*info), GFP_KERNEL);
+        info = smi_info_alloc();
         if (!info)
                 return -ENOMEM;
 
@@ -2566,7 +2577,7 @@ static int __devinit ipmi_of_probe(struct platform_device *dev,
                 return -EINVAL;
         }
 
-        info = kzalloc(sizeof(*info), GFP_KERNEL);
+        info = smi_info_alloc();
 
         if (!info) {
                 dev_err(&dev->dev,
@@ -3013,7 +3024,7 @@ static __devinit void default_find_bmc(void)
                 if (check_legacy_ioport(ipmi_defaults[i].port))
                         continue;
 #endif
-                info = kzalloc(sizeof(*info), GFP_KERNEL);
+                info = smi_info_alloc();
                 if (!info)
                         return;
 
@@ -3138,9 +3149,6 @@ static int try_smi_init(struct smi_info *new_smi)
                 goto out_err;
         }
 
-        spin_lock_init(&(new_smi->si_lock));
-        spin_lock_init(&(new_smi->msg_lock));
-
         /* Do low-level detection first. */
         if (new_smi->handlers->detect(new_smi->si_sm)) {
                 if (new_smi->addr_source)
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index 0eac3da566ba..a84250a5dd51 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -1467,7 +1467,7 @@ static int ablkcipher_add(unsigned int *drestp, struct scatterlist *dst,
                 return -EINVAL;
 
         while (size) {
-                copy = min(drest, min(size, dst->length));
+                copy = min3(drest, size, dst->length);
 
                 size -= copy;
                 drest -= copy;
@@ -1729,7 +1729,7 @@ static int ablkcipher_get(void *saddr, unsigned int *srestp, unsigned int offset
                 return -EINVAL;
 
         while (size) {
-                copy = min(srest, min(dst->length, size));
+                copy = min3(srest, dst->length, size);
 
                 daddr = kmap_atomic(sg_page(dst), KM_IRQ0);
                 memcpy(daddr + dst->offset + offset, saddr, copy);
diff --git a/drivers/gpio/pca953x.c b/drivers/gpio/pca953x.c
index a2b12aa1f2b9..501866662e05 100644
--- a/drivers/gpio/pca953x.c
+++ b/drivers/gpio/pca953x.c
@@ -345,7 +345,7 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
 
         do {
                 level = __ffs(pending);
-                handle_nested_irq(level + chip->irq_base);
+                generic_handle_irq(level + chip->irq_base);
 
                 pending &= ~(1 << level);
         } while (pending);
@@ -360,7 +360,8 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
         struct pca953x_platform_data *pdata = client->dev.platform_data;
         int ret;
 
-        if (pdata->irq_base && (id->driver_data & PCA953X_INT)) {
+        if (pdata->irq_base != -1
+                        && (id->driver_data & PCA953X_INT)) {
                 int lvl;
 
                 ret = pca953x_read_reg(chip, PCA953X_INPUT,
@@ -383,7 +384,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
                         set_irq_chip_data(irq, chip);
                         set_irq_chip_and_handler(irq, &pca953x_irq_chip,
                                                  handle_edge_irq);
-                        set_irq_nested_thread(irq, 1);
 #ifdef CONFIG_ARM
                         set_irq_flags(irq, IRQF_VALID);
 #else
@@ -394,6 +394,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
                 ret = request_threaded_irq(client->irq,
                                            NULL,
                                            pca953x_irq_handler,
+                                           IRQF_TRIGGER_RISING |
                                            IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
                                            dev_name(&client->dev), chip);
                 if (ret) {
@@ -408,13 +409,13 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
         return 0;
 
 out_failed:
-        chip->irq_base = 0;
+        chip->irq_base = -1;
         return ret;
 }
 
 static void pca953x_irq_teardown(struct pca953x_chip *chip)
 {
-        if (chip->irq_base)
+        if (chip->irq_base != -1)
                 free_irq(chip->client->irq, chip);
 }
 #else /* CONFIG_GPIO_PCA953X_IRQ */
@@ -424,7 +425,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
         struct i2c_client *client = chip->client;
         struct pca953x_platform_data *pdata = client->dev.platform_data;
 
-        if (pdata->irq_base && (id->driver_data & PCA953X_INT))
+        if (pdata->irq_base != -1 && (id->driver_data & PCA953X_INT))
                 dev_warn(&client->dev, "interrupt support not compiled in\n");
 
         return 0;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 90b1d6753b9d..eb6c473c6d1b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -155,11 +155,11 @@ fast_shmem_read(struct page **pages,
         char __iomem *vaddr;
         int unwritten;
 
-        vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0);
+        vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT]);
         if (vaddr == NULL)
                 return -ENOMEM;
         unwritten = __copy_to_user_inatomic(data, vaddr + page_offset, length);
-        kunmap_atomic(vaddr, KM_USER0);
+        kunmap_atomic(vaddr);
 
         if (unwritten)
                 return -EFAULT;
@@ -509,10 +509,10 @@ fast_user_write(struct io_mapping *mapping,
         char *vaddr_atomic;
         unsigned long unwritten;
 
-        vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base, KM_USER0);
+        vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base);
         unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + page_offset,
                                                       user_data, length);
-        io_mapping_unmap_atomic(vaddr_atomic, KM_USER0);
+        io_mapping_unmap_atomic(vaddr_atomic);
         if (unwritten)
                 return -EFAULT;
         return 0;
@@ -551,11 +551,11 @@ fast_shmem_write(struct page **pages,
         char __iomem *vaddr;
         unsigned long unwritten;
 
-        vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT], KM_USER0);
+        vaddr = kmap_atomic(pages[page_base >> PAGE_SHIFT]);
         if (vaddr == NULL)
                 return -ENOMEM;
         unwritten = __copy_from_user_inatomic(vaddr + page_offset, data, length);
-        kunmap_atomic(vaddr, KM_USER0);
+        kunmap_atomic(vaddr);
 
         if (unwritten)
                 return -EFAULT;
@@ -3346,8 +3346,7 @@ i915_gem_object_pin_and_relocate(struct drm_gem_object *obj,
                 reloc_offset = obj_priv->gtt_offset + reloc->offset;
                 reloc_page = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
                                                       (reloc_offset &
-                                                       ~(PAGE_SIZE - 1)),
-                                                      KM_USER0);
+                                                       ~(PAGE_SIZE - 1)));
                 reloc_entry = (uint32_t __iomem *)(reloc_page +
                                                    (reloc_offset & (PAGE_SIZE - 1)));
                 reloc_val = target_obj_priv->gtt_offset + reloc->delta;
@@ -3358,7 +3357,7 @@ i915_gem_object_pin_and_relocate(struct drm_gem_object *obj,
                           readl(reloc_entry), reloc_val);
 #endif
                 writel(reloc_val, reloc_entry);
-                io_mapping_unmap_atomic(reloc_page, KM_USER0);
+                io_mapping_unmap_atomic(reloc_page);
 
                 /* The updated presumed offset for this entry will be
                  * copied back out to the user.
@@ -4772,11 +4771,11 @@ void i915_gem_detach_phys_object(struct drm_device *dev,
         page_count = obj->size / PAGE_SIZE;
 
         for (i = 0; i < page_count; i++) {
-                char *dst = kmap_atomic(obj_priv->pages[i], KM_USER0);
+                char *dst = kmap_atomic(obj_priv->pages[i]);
                 char *src = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE);
 
                 memcpy(dst, src, PAGE_SIZE);
-                kunmap_atomic(dst, KM_USER0);
+                kunmap_atomic(dst);
         }
         drm_clflush_pages(obj_priv->pages, page_count);
         drm_agp_chipset_flush(dev);
@@ -4833,11 +4832,11 @@ i915_gem_attach_phys_object(struct drm_device *dev,
         page_count = obj->size / PAGE_SIZE;
 
         for (i = 0; i < page_count; i++) {
-                char *src = kmap_atomic(obj_priv->pages[i], KM_USER0);
+                char *src = kmap_atomic(obj_priv->pages[i]);
                 char *dst = obj_priv->phys_obj->handle->vaddr + (i * PAGE_SIZE);
 
                 memcpy(dst, src, PAGE_SIZE);
-                kunmap_atomic(src, KM_USER0);
+                kunmap_atomic(src);
         }
 
         i915_gem_object_put_pages(obj);
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 744225ebb4b2..b80010f0c4c9 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -456,10 +456,9 @@ i915_error_object_create(struct drm_device *dev,
 
                 local_irq_save(flags);
                 s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
-                                             reloc_offset,
-                                             KM_IRQ0);
+                                             reloc_offset);
                 memcpy_fromio(d, s, PAGE_SIZE);
-                io_mapping_unmap_atomic(s, KM_IRQ0);
+                io_mapping_unmap_atomic(s);
                 local_irq_restore(flags);
 
                 dst->pages[page] = d;
diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 1d306a458be6..3264bbd47e65 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -187,8 +187,7 @@ static struct overlay_registers *intel_overlay_map_regs_atomic(struct intel_over
 
         if (OVERLAY_NONPHYSICAL(overlay->dev)) {
                 regs = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
-                                                overlay->reg_bo->gtt_offset,
-                                                KM_USER0);
+                                                overlay->reg_bo->gtt_offset);
 
                 if (!regs) {
                         DRM_ERROR("failed to map overlay regs in GTT\n");
@@ -203,7 +202,7 @@ static struct overlay_registers *intel_overlay_map_regs_atomic(struct intel_over
 static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay)
 {
         if (OVERLAY_NONPHYSICAL(overlay->dev))
-                io_mapping_unmap_atomic(overlay->virt_addr, KM_USER0);
+                io_mapping_unmap_atomic(overlay->virt_addr);
 
         overlay->virt_addr = NULL;
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index 974b0f8ae048..8fa339600fe3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -2167,11 +2167,11 @@ peek_fb(struct drm_device *dev, struct io_mapping *fb,
 
         if (off < pci_resource_len(dev->pdev, 1)) {
                 uint8_t __iomem *p =
-                        io_mapping_map_atomic_wc(fb, off & PAGE_MASK, KM_USER0);
+                        io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
 
                 val = ioread32(p + (off & ~PAGE_MASK));
 
-                io_mapping_unmap_atomic(p, KM_USER0);
+                io_mapping_unmap_atomic(p);
         }
 
         return val;
@@ -2183,12 +2183,12 @@ poke_fb(struct drm_device *dev, struct io_mapping *fb,
 {
         if (off < pci_resource_len(dev->pdev, 1)) {
                 uint8_t __iomem *p =
-                        io_mapping_map_atomic_wc(fb, off & PAGE_MASK, KM_USER0);
+                        io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
 
                 iowrite32(val, p + (off & ~PAGE_MASK));
                 wmb();
 
-                io_mapping_unmap_atomic(p, KM_USER0);
+                io_mapping_unmap_atomic(p);
         }
 }
 
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 3451a82adba7..e8a73e65da69 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -170,7 +170,7 @@ static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
         src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
 
 #ifdef CONFIG_X86
-        dst = kmap_atomic_prot(d, KM_USER0, prot);
+        dst = kmap_atomic_prot(d, prot);
 #else
         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
                 dst = vmap(&d, 1, 0, prot);
@@ -183,7 +183,7 @@ static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
         memcpy_fromio(dst, src, PAGE_SIZE);
 
 #ifdef CONFIG_X86
-        kunmap_atomic(dst, KM_USER0);
+        kunmap_atomic(dst);
 #else
         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
                 vunmap(dst);
@@ -206,7 +206,7 @@ static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
 
         dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
 #ifdef CONFIG_X86
-        src = kmap_atomic_prot(s, KM_USER0, prot);
+        src = kmap_atomic_prot(s, prot);
 #else
         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
                 src = vmap(&s, 1, 0, prot);
@@ -219,7 +219,7 @@ static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
         memcpy_toio(dst, src, PAGE_SIZE);
 
 #ifdef CONFIG_X86
-        kunmap_atomic(src, KM_USER0);
+        kunmap_atomic(src);
 #else
         if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
                 vunmap(src);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index b4b22576f12a..19c5d3b191f4 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -1409,8 +1409,7 @@ static int __init ipoib_init_module(void)
 
         ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
         ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
-        ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE,
-                                                     IPOIB_MIN_QUEUE_SIZE));
+        ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
 #ifdef CONFIG_INFINIBAND_IPOIB_CM
         ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
 #endif
diff --git a/drivers/macintosh/windfarm_pm121.c b/drivers/macintosh/windfarm_pm121.c
index 947d4afa25ca..30e6195e19d4 100644
--- a/drivers/macintosh/windfarm_pm121.c
+++ b/drivers/macintosh/windfarm_pm121.c
@@ -482,7 +482,7 @@ static s32 pm121_correct(s32 new_setpoint,
         new_min += correction->offset;
         new_min = (new_min >> 16) + min;
 
-        return max(new_setpoint, max(new_min, 0));
+        return max3(new_setpoint, new_min, 0);
 }
 
 static s32 pm121_connect(unsigned int control_id, s32 setpoint)
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 0b61792a2780..2129cdb115dc 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -254,7 +254,7 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, int rw,
          * Issue the synchronous I/O from a different thread
          * to avoid generic_make_request recursion.
          */
-        INIT_WORK_ON_STACK(&req.work, do_metadata);
+        INIT_WORK_ONSTACK(&req.work, do_metadata);
         queue_work(ps->metadata_wq, &req.work);
         flush_workqueue(ps->metadata_wq);
 
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 1f69743b12ec..5a74db75f66f 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -4,7 +4,6 @@
 
 menuconfig MISC_DEVICES
         bool "Misc devices"
-        default y
         ---help---
           Say Y here to get to see options for device drivers from various
           different categories. This option alone does not add any kernel code.
@@ -24,7 +23,8 @@ config AD525X_DPOT
           AD5260, AD5262, AD5263, AD5290, AD5291, AD5292, AD5293,
           AD7376, AD8400, AD8402, AD8403, ADN2850, AD5241, AD5242,
           AD5243, AD5245, AD5246, AD5247, AD5248, AD5280, AD5282,
-          ADN2860, AD5273, AD5171, AD5170, AD5172, AD5173
+          ADN2860, AD5273, AD5171, AD5170, AD5172, AD5173, AD5270,
+          AD5271, AD5272, AD5274
           digital potentiometer chips.
 
           See Documentation/misc-devices/ad525x_dpot.txt for the
@@ -284,6 +284,16 @@ config SGI_GRU_DEBUG
         This option enables addition debugging code for the SGI GRU driver. If
         you are unsure, say N.
 
+config APDS9802ALS
+        tristate "Medfield Avago APDS9802 ALS Sensor module"
+        depends on I2C
+        help
+          If you say yes here you get support for the ALS APDS9802 ambient
+          light sensor.
+
+          This driver can also be built as a module.  If so, the module
+          will be called apds9802als.
+
 config ISL29003
         tristate "Intersil ISL29003 ambient light sensor"
         depends on I2C && SYSFS
@@ -294,6 +304,16 @@ config ISL29003
           This driver can also be built as a module.  If so, the module
           will be called isl29003.
 
+config ISL29020
+        tristate "Intersil ISL29020 ambient light sensor"
+        depends on I2C
+        help
+          If you say yes here you get support for the Intersil ISL29020
+          ambient light sensor.
+
+          This driver can also be built as a module.  If so, the module
+          will be called isl29020.
+
 config SENSORS_TSL2550
         tristate "Taos TSL2550 ambient light sensor"
         depends on I2C && SYSFS
@@ -314,6 +334,27 @@ config SENSORS_BH1780
           This driver can also be built as a module.  If so, the module
           will be called bh1780gli.
 
+config SENSORS_BH1770
+         tristate "BH1770GLC / SFH7770 combined ALS - Proximity sensor"
+         depends on I2C
+         ---help---
+           Say Y here if you want to build a driver for BH1770GLC (ROHM) or
+           SFH7770 (Osram) combined ambient light and proximity sensor chip.
+
+           To compile this driver as a module, choose M here: the
+           module will be called bh1770glc. If unsure, say N here.
+
+config SENSORS_APDS990X
+         tristate "APDS990X combined als and proximity sensors"
+         depends on I2C
+         default n
+         ---help---
+           Say Y here if you want to build a driver for Avago APDS990x
+           combined ambient light and proximity sensor chip.
+
+           To compile this driver as a module, choose M here: the
+           module will be called apds990x. If unsure, say N here.
+
 config HMC6352
         tristate "Honeywell HMC6352 compass"
         depends on I2C
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 9f2986b4da2f..4be5c6fc5ef4 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -16,6 +16,8 @@ obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
 obj-$(CONFIG_TIFM_7XX1)         += tifm_7xx1.o
 obj-$(CONFIG_PHANTOM)           += phantom.o
 obj-$(CONFIG_SENSORS_BH1780)    += bh1780gli.o
+obj-$(CONFIG_SENSORS_BH1770)    += bh1770glc.o
+obj-$(CONFIG_SENSORS_APDS990X)  += apds990x.o
 obj-$(CONFIG_SGI_IOC4)          += ioc4.o
 obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
 obj-$(CONFIG_KGDB_TESTS)        += kgdbts.o
@@ -23,7 +25,9 @@ obj-$(CONFIG_SGI_XP)		+= sgi-xp/
 obj-$(CONFIG_SGI_GRU)           += sgi-gru/
 obj-$(CONFIG_CS5535_MFGPT)      += cs5535-mfgpt.o
 obj-$(CONFIG_HP_ILO)            += hpilo.o
+obj-$(CONFIG_APDS9802ALS)       += apds9802als.o
 obj-$(CONFIG_ISL29003)          += isl29003.o
+obj-$(CONFIG_ISL29020)          += isl29020.o
 obj-$(CONFIG_SENSORS_TSL2550)   += tsl2550.o
 obj-$(CONFIG_EP93XX_PWM)        += ep93xx_pwm.o
 obj-$(CONFIG_DS1682)            += ds1682.o
diff --git a/drivers/misc/ad525x_dpot-i2c.c b/drivers/misc/ad525x_dpot-i2c.c
index 374352af7979..4ff73c215746 100644
--- a/drivers/misc/ad525x_dpot-i2c.c
+++ b/drivers/misc/ad525x_dpot-i2c.c
@@ -102,6 +102,8 @@ static const struct i2c_device_id ad_dpot_id[] = {
         {"ad5170", AD5170_ID},
         {"ad5172", AD5172_ID},
         {"ad5173", AD5173_ID},
+        {"ad5272", AD5272_ID},
+        {"ad5274", AD5274_ID},
         {}
 };
 MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
diff --git a/drivers/misc/ad525x_dpot-spi.c b/drivers/misc/ad525x_dpot-spi.c
index b8c6df9c8437..7f9a55afe05d 100644
--- a/drivers/misc/ad525x_dpot-spi.c
+++ b/drivers/misc/ad525x_dpot-spi.c
@@ -38,6 +38,8 @@ static const struct ad_dpot_id ad_dpot_spi_devlist[] = {
         {.name = "ad8402", .devid = AD8402_ID},
         {.name = "ad8403", .devid = AD8403_ID},
         {.name = "adn2850", .devid = ADN2850_ID},
+        {.name = "ad5270", .devid = AD5270_ID},
+        {.name = "ad5271", .devid = AD5271_ID},
         {}
 };
 
@@ -53,13 +55,13 @@ static int write8(void *client, u8 val)
 static int write16(void *client, u8 reg, u8 val)
 {
         u8 data[2] = {reg, val};
-        return spi_write(client, data, 1);
+        return spi_write(client, data, 2);
 }
 
 static int write24(void *client, u8 reg, u16 val)
 {
         u8 data[3] = {reg, val >> 8, val};
-        return spi_write(client, data, 1);
+        return spi_write(client, data, 3);
 }
 
 static int read8(void *client)
diff --git a/drivers/misc/ad525x_dpot.c b/drivers/misc/ad525x_dpot.c
index 5e6fa8449e8b..7cb911028d09 100644
--- a/drivers/misc/ad525x_dpot.c
+++ b/drivers/misc/ad525x_dpot.c
@@ -29,9 +29,9 @@
  * AD5262               2               256             20, 50, 200
  * AD5263               4               256             20, 50, 200
  * AD5290               1               256             10, 50, 100
- * AD5291               1               256             20
- * AD5292               1               1024            20
- * AD5293               1               1024            20
+ * AD5291               1               256             20, 50, 100  (20-TP)
+ * AD5292               1               1024            20, 50, 100  (20-TP)
+ * AD5293               1               1024            20, 50, 100
  * AD7376               1               128             10, 50, 100, 1M
  * AD8400               1               256             1, 10, 50, 100
  * AD8402               2               256             1, 10, 50, 100
@@ -52,6 +52,10 @@
  * AD5170               1               256             2.5, 10, 50, 100 (OTP)
  * AD5172               2               256             2.5, 10, 50, 100 (OTP)
  * AD5173               2               256             2.5, 10, 50, 100 (OTP)
+ * AD5270               1               1024            20, 50, 100 (50-TP)
+ * AD5271               1               256             20, 50, 100 (50-TP)
+ * AD5272               1               1024            20, 50, 100 (50-TP)
+ * AD5274               1               256             20, 50, 100 (50-TP)
  *
  * See Documentation/misc-devices/ad525x_dpot.txt for more info.
  *
@@ -126,18 +130,38 @@ static inline int dpot_write_r8d16(struct dpot_data *dpot, u8 reg, u16 val)
 static s32 dpot_read_spi(struct dpot_data *dpot, u8 reg)
 {
         unsigned ctrl = 0;
+        int value;
 
         if (!(reg & (DPOT_ADDR_EEPROM | DPOT_ADDR_CMD))) {
 
                 if (dpot->feat & F_RDACS_WONLY)
                         return dpot->rdac_cache[reg & DPOT_RDAC_MASK];
-
                 if (dpot->uid == DPOT_UID(AD5291_ID) ||
                         dpot->uid == DPOT_UID(AD5292_ID) ||
-                        dpot->uid == DPOT_UID(AD5293_ID))
-                        return dpot_read_r8d8(dpot,
+                        dpot->uid == DPOT_UID(AD5293_ID)) {
+
+                        value = dpot_read_r8d8(dpot,
                                 DPOT_AD5291_READ_RDAC << 2);
 
+                        if (dpot->uid == DPOT_UID(AD5291_ID))
+                                value = value >> 2;
+
+                        return value;
+                } else if (dpot->uid == DPOT_UID(AD5270_ID) ||
+                        dpot->uid == DPOT_UID(AD5271_ID)) {
+
+                        value = dpot_read_r8d8(dpot,
+                                DPOT_AD5270_1_2_4_READ_RDAC << 2);
+
+                        if (value < 0)
+                                return value;
+
+                        if (dpot->uid == DPOT_UID(AD5271_ID))
+                                value = value >> 2;
+
+                        return value;
+                }
+
                 ctrl = DPOT_SPI_READ_RDAC;
         } else if (reg & DPOT_ADDR_EEPROM) {
                 ctrl = DPOT_SPI_READ_EEPROM;
@@ -153,6 +177,7 @@ static s32 dpot_read_spi(struct dpot_data *dpot, u8 reg)
 
 static s32 dpot_read_i2c(struct dpot_data *dpot, u8 reg)
 {
+        int value;
         unsigned ctrl = 0;
         switch (dpot->uid) {
         case DPOT_UID(AD5246_ID):
@@ -166,7 +191,7 @@ static s32 dpot_read_i2c(struct dpot_data *dpot, u8 reg)
         case DPOT_UID(AD5280_ID):
         case DPOT_UID(AD5282_ID):
                 ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ?
-                        0 : DPOT_AD5291_RDAC_AB;
+                        0 : DPOT_AD5282_RDAC_AB;
                 return dpot_read_r8d8(dpot, ctrl);
         case DPOT_UID(AD5170_ID):
         case DPOT_UID(AD5171_ID):
@@ -175,8 +200,27 @@ static s32 dpot_read_i2c(struct dpot_data *dpot, u8 reg)
         case DPOT_UID(AD5172_ID):
         case DPOT_UID(AD5173_ID):
                 ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ?
-                        0 : DPOT_AD5272_3_A0;
+                        0 : DPOT_AD5172_3_A0;
                 return dpot_read_r8d8(dpot, ctrl);
+        case DPOT_UID(AD5272_ID):
+        case DPOT_UID(AD5274_ID):
+                        dpot_write_r8d8(dpot,
+                                (DPOT_AD5270_1_2_4_READ_RDAC << 2), 0);
+
+                        value = dpot_read_r8d16(dpot,
+                                DPOT_AD5270_1_2_4_RDAC << 2);
+
+                        if (value < 0)
+                                return value;
+                        /*
+                         * AD5272/AD5274 returns high byte first, however
+                         * underling smbus expects low byte first.
+                         */
+                        value = swab16(value);
+
+                        if (dpot->uid == DPOT_UID(AD5271_ID))
+                                value = value >> 2;
+                return value;
         default:
                 if ((reg & DPOT_REG_TOL) || (dpot->max_pos > 256))
                         return dpot_read_r8d16(dpot, (reg & 0xF8) |
@@ -198,7 +242,7 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value)
 {
         unsigned val = 0;
 
-        if (!(reg & (DPOT_ADDR_EEPROM | DPOT_ADDR_CMD))) {
+        if (!(reg & (DPOT_ADDR_EEPROM | DPOT_ADDR_CMD | DPOT_ADDR_OTP))) {
                 if (dpot->feat & F_RDACS_WONLY)
                         dpot->rdac_cache[reg & DPOT_RDAC_MASK] = value;
 
@@ -219,11 +263,30 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value)
                 } else {
                         if (dpot->uid == DPOT_UID(AD5291_ID) ||
                                 dpot->uid == DPOT_UID(AD5292_ID) ||
-                                dpot->uid == DPOT_UID(AD5293_ID))
+                                dpot->uid == DPOT_UID(AD5293_ID)) {
+
+                                dpot_write_r8d8(dpot, DPOT_AD5291_CTRLREG << 2,
+                                                DPOT_AD5291_UNLOCK_CMD);
+
+                                if (dpot->uid == DPOT_UID(AD5291_ID))
+                                        value = value << 2;
+
                                 return dpot_write_r8d8(dpot,
                                         (DPOT_AD5291_RDAC << 2) |
                                         (value >> 8), value & 0xFF);
+                        } else if (dpot->uid == DPOT_UID(AD5270_ID) ||
+                                dpot->uid == DPOT_UID(AD5271_ID)) {
+                                dpot_write_r8d8(dpot,
+                                                DPOT_AD5270_1_2_4_CTRLREG << 2,
+                                                DPOT_AD5270_1_2_4_UNLOCK_CMD);
+
+                                if (dpot->uid == DPOT_UID(AD5271_ID))
+                                        value = value << 2;
 
+                                return dpot_write_r8d8(dpot,
+                                        (DPOT_AD5270_1_2_4_RDAC << 2) |
+                                        (value >> 8), value & 0xFF);
+                        }
                         val = DPOT_SPI_RDAC | (reg & DPOT_RDAC_MASK);
                 }
         } else if (reg & DPOT_ADDR_EEPROM) {
@@ -243,6 +306,16 @@ static s32 dpot_write_spi(struct dpot_data *dpot, u8 reg, u16 value)
                         val = DPOT_SPI_INC_ALL;
                         break;
                 }
+        } else if (reg & DPOT_ADDR_OTP) {
+                if (dpot->uid == DPOT_UID(AD5291_ID) ||
+                        dpot->uid == DPOT_UID(AD5292_ID)) {
+                        return dpot_write_r8d8(dpot,
+                                DPOT_AD5291_STORE_XTPM << 2, 0);
+                } else if (dpot->uid == DPOT_UID(AD5270_ID) ||
+                        dpot->uid == DPOT_UID(AD5271_ID)) {
+                        return dpot_write_r8d8(dpot,
+                                DPOT_AD5270_1_2_4_STORE_XTPM << 2, 0);
+                }
         } else
                 BUG();
 
@@ -273,7 +346,7 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value)
         case DPOT_UID(AD5280_ID):
         case DPOT_UID(AD5282_ID):
                 ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ?
-                        0 : DPOT_AD5291_RDAC_AB;
+                        0 : DPOT_AD5282_RDAC_AB;
                 return dpot_write_r8d8(dpot, ctrl, value);
                 break;
         case DPOT_UID(AD5171_ID):
@@ -289,12 +362,12 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value)
         case DPOT_UID(AD5172_ID):
         case DPOT_UID(AD5173_ID):
                 ctrl = ((reg & DPOT_RDAC_MASK) == DPOT_RDAC0) ?
-                        0 : DPOT_AD5272_3_A0;
+                        0 : DPOT_AD5172_3_A0;
                 if (reg & DPOT_ADDR_OTP) {
                         tmp = dpot_read_r8d16(dpot, ctrl);
                         if (tmp >> 14) /* Ready to Program? */
                                 return -EFAULT;
-                        ctrl |= DPOT_AD5270_2_3_FUSE;
+                        ctrl |= DPOT_AD5170_2_3_FUSE;
                 }
                 return dpot_write_r8d8(dpot, ctrl, value);
                 break;
@@ -303,10 +376,25 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value)
                         tmp = dpot_read_r8d16(dpot, tmp);
                         if (tmp >> 14) /* Ready to Program? */
                                 return -EFAULT;
-                        ctrl = DPOT_AD5270_2_3_FUSE;
+                        ctrl = DPOT_AD5170_2_3_FUSE;
                 }
                 return dpot_write_r8d8(dpot, ctrl, value);
                 break;
+        case DPOT_UID(AD5272_ID):
+        case DPOT_UID(AD5274_ID):
+                dpot_write_r8d8(dpot, DPOT_AD5270_1_2_4_CTRLREG << 2,
+                                DPOT_AD5270_1_2_4_UNLOCK_CMD);
+
+                if (reg & DPOT_ADDR_OTP)
+                        return dpot_write_r8d8(dpot,
+                                        DPOT_AD5270_1_2_4_STORE_XTPM << 2, 0);
+
+                if (dpot->uid == DPOT_UID(AD5274_ID))
+                        value = value << 2;
+
+                return dpot_write_r8d8(dpot, (DPOT_AD5270_1_2_4_RDAC << 2) |
+                                       (value >> 8), value & 0xFF);
+                break;
         default:
                 if (reg & DPOT_ADDR_CMD)
                         return dpot_write_d8(dpot, reg);
@@ -320,7 +408,6 @@ static s32 dpot_write_i2c(struct dpot_data *dpot, u8 reg, u16 value)
         }
 }
 
-
 static s32 dpot_write(struct dpot_data *dpot, u8 reg, u16 value)
 {
         if (dpot->feat & F_SPI)
diff --git a/drivers/misc/ad525x_dpot.h b/drivers/misc/ad525x_dpot.h
index 78b89fd2e2fd..a662f5987b68 100644
--- a/drivers/misc/ad525x_dpot.h
+++ b/drivers/misc/ad525x_dpot.h
@@ -47,9 +47,9 @@ enum dpot_devid {
         AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */
         AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),
         AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
-                        BRDAC0 | BRDAC3, 6, 2),
+                        BRDAC1 | BRDAC3, 6, 2),
         AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
-                        BRDAC0 | BRDAC3, 8, 3),
+                        BRDAC1 | BRDAC3, 8, 3),
         AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),
         AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
@@ -93,8 +93,10 @@ enum dpot_devid {
                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23),
         AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
                         BRDAC0, 8, 24),
-        AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 8, 25),
-        AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 26),
+        AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP,
+                        BRDAC0, 8, 25),
+        AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP,
+                        BRDAC0, 10, 26),
         AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27),
         AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
                         BRDAC0, 7, 28),
@@ -122,6 +124,12 @@ enum dpot_devid {
         AD5170_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 45),
         AD5172_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 46),
         AD5173_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 47),
+        AD5270_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT,
+                        BRDAC0, 10, 48),
+        AD5271_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT,
+                        BRDAC0, 8, 49),
+        AD5272_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 10, 50),
+        AD5274_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 51),
 };
 
 #define DPOT_RDAC0              0
@@ -165,15 +173,24 @@ enum dpot_devid {
 /* AD5291/2/3 use special commands */
 #define DPOT_AD5291_RDAC        0x01
 #define DPOT_AD5291_READ_RDAC   0x02
+#define DPOT_AD5291_STORE_XTPM  0x03
+#define DPOT_AD5291_CTRLREG     0x06
+#define DPOT_AD5291_UNLOCK_CMD  0x03
 
-/* AD524x use special commands */
-#define DPOT_AD5291_RDAC_AB     0x80
+/* AD5270/1/2/4 use special commands */
+#define DPOT_AD5270_1_2_4_RDAC          0x01
+#define DPOT_AD5270_1_2_4_READ_RDAC     0x02
+#define DPOT_AD5270_1_2_4_STORE_XTPM    0x03
+#define DPOT_AD5270_1_2_4_CTRLREG       0x07
+#define DPOT_AD5270_1_2_4_UNLOCK_CMD    0x03
+
+#define DPOT_AD5282_RDAC_AB     0x80
 
 #define DPOT_AD5273_FUSE        0x80
-#define DPOT_AD5270_2_3_FUSE    0x20
-#define DPOT_AD5270_2_3_OW      0x08
-#define DPOT_AD5272_3_A0        0x08
-#define DPOT_AD5270_2FUSE       0x80
+#define DPOT_AD5170_2_3_FUSE    0x20
+#define DPOT_AD5170_2_3_OW      0x08
+#define DPOT_AD5172_3_A0        0x08
+#define DPOT_AD5170_2FUSE       0x80
 
 struct dpot_data;
 
diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c
new file mode 100644
index 000000000000..f9b91ba8900c
--- /dev/null
+++ b/drivers/misc/apds9802als.c
@@ -0,0 +1,347 @@
+/*
+ * apds9802als.c - apds9802  ALS Driver
+ *
+ * Copyright (C) 2009 Intel Corp
+ *
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/pm_runtime.h>
+
+#define ALS_MIN_RANGE_VAL 1
+#define ALS_MAX_RANGE_VAL 2
+#define POWER_STA_ENABLE 1
+#define POWER_STA_DISABLE 0
+
+#define DRIVER_NAME "apds9802als"
+
+struct als_data {
+        struct mutex mutex;
+};
+
+static ssize_t als_sensing_range_show(struct device *dev,
+                        struct device_attribute *attr,  char *buf)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        int  val;
+
+        val = i2c_smbus_read_byte_data(client, 0x81);
+        if (val < 0)
+                return val;
+        if (val & 1)
+                return sprintf(buf, "4095\n");
+        else
+                return sprintf(buf, "65535\n");
+}
+
+static int als_wait_for_data_ready(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        int ret;
+        int retry = 10;
+
+        do {
+                msleep(30);
+                ret = i2c_smbus_read_byte_data(client, 0x86);
+        } while (!(ret & 0x80) && retry--);
+
+        if (!retry) {
+                dev_warn(dev, "timeout waiting for data ready\n");
+                return -ETIMEDOUT;
+        }
+
+        return 0;
+}
+
+static ssize_t als_lux0_input_data_show(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct als_data *data = i2c_get_clientdata(client);
+        int ret_val;
+        int temp;
+
+        /* Protect against parallel reads */
+        pm_runtime_get_sync(dev);
+        mutex_lock(&data->mutex);
+
+        /* clear EOC interrupt status */
+        i2c_smbus_write_byte(client, 0x40);
+        /* start measurement */
+        temp = i2c_smbus_read_byte_data(client, 0x81);
+        i2c_smbus_write_byte_data(client, 0x81, temp | 0x08);
+
+        ret_val = als_wait_for_data_ready(dev);
+        if (ret_val < 0)
+                goto failed;
+
+        temp = i2c_smbus_read_byte_data(client, 0x8C); /* LSB data */
+        if (temp < 0) {
+                ret_val = temp;
+                goto failed;
+        }
+        ret_val = i2c_smbus_read_byte_data(client, 0x8D); /* MSB data */
+        if (ret_val < 0)
+                goto failed;
+
+        mutex_unlock(&data->mutex);
+        pm_runtime_put_sync(dev);
+
+        temp = (ret_val << 8) | temp;
+        return sprintf(buf, "%d\n", temp);
+failed:
+        mutex_unlock(&data->mutex);
+        pm_runtime_put_sync(dev);
+        return ret_val;
+}
+
+static ssize_t als_sensing_range_store(struct device *dev,
+                struct device_attribute *attr, const  char *buf, size_t count)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct als_data *data = i2c_get_clientdata(client);
+        unsigned int ret_val;
+        unsigned long val;
+
+        if (strict_strtoul(buf, 10, &val))
+                return -EINVAL;
+
+        if (val < 4096)
+                val = 1;
+        else if (val < 65536)
+                val = 2;
+        else
+                return -ERANGE;
+
+        pm_runtime_get_sync(dev);
+
+        /* Make sure nobody else reads/modifies/writes 0x81 while we
+           are active */
+        mutex_lock(&data->mutex);
+
+        ret_val = i2c_smbus_read_byte_data(client, 0x81);
+        if (ret_val < 0)
+                goto fail;
+
+        /* Reset the bits before setting them */
+        ret_val = ret_val & 0xFA;
+
+        if (val == 1) /* Setting detection range up to 4k LUX */
+                ret_val = (ret_val | 0x01);
+        else /* Setting detection range up to 64k LUX*/
+                ret_val = (ret_val | 0x00);
+
+        ret_val = i2c_smbus_write_byte_data(client, 0x81, ret_val);
+
+        if (ret_val >= 0) {
+                /* All OK */
+                mutex_unlock(&data->mutex);
+                pm_runtime_put_sync(dev);
+                return count;
+        }
+fail:
+        mutex_unlock(&data->mutex);
+        pm_runtime_put_sync(dev);
+        return ret_val;
+}
+
+static int als_set_power_state(struct i2c_client *client, bool on_off)
+{
+        int ret_val;
+        struct als_data *data = i2c_get_clientdata(client);
+
+        mutex_lock(&data->mutex);
+        ret_val = i2c_smbus_read_byte_data(client, 0x80);
+        if (ret_val < 0)
+                goto fail;
+        if (on_off)
+                ret_val = ret_val | 0x01;
+        else
+                ret_val = ret_val & 0xFE;
+        ret_val = i2c_smbus_write_byte_data(client, 0x80, ret_val);
+fail:
+        mutex_unlock(&data->mutex);
+        return ret_val;
+}
+
+static DEVICE_ATTR(lux0_sensor_range, S_IRUGO | S_IWUSR,
+        als_sensing_range_show, als_sensing_range_store);
+static DEVICE_ATTR(lux0_input, S_IRUGO, als_lux0_input_data_show, NULL);
+
+static struct attribute *mid_att_als[] = {
+        &dev_attr_lux0_sensor_range.attr,
+        &dev_attr_lux0_input.attr,
+        NULL
+};
+
+static struct attribute_group m_als_gr = {
+        .name = "apds9802als",
+        .attrs = mid_att_als
+};
+
+static int als_set_default_config(struct i2c_client *client)
+{
+        int ret_val;
+        /* Write the command and then switch on */
+        ret_val = i2c_smbus_write_byte_data(client, 0x80, 0x01);
+        if (ret_val < 0) {
+                dev_err(&client->dev, "failed default switch on write\n");
+                return ret_val;
+        }
+        /* detection range: 1~64K Lux, maunal measurement */
+        ret_val = i2c_smbus_write_byte_data(client, 0x81, 0x08);
+        if (ret_val < 0)
+                dev_err(&client->dev, "failed default LUX on write\n");
+
+        /*  We always get 0 for the 1st measurement after system power on,
+         *  so make sure it is finished before user asks for data.
+         */
+        als_wait_for_data_ready(&client->dev);
+
+        return ret_val;
+}
+
+static int apds9802als_probe(struct i2c_client *client,
+                             const struct i2c_device_id *id)
+{
+        int res;
+        struct als_data *data;
+
+        data = kzalloc(sizeof(struct als_data), GFP_KERNEL);
+        if (data == NULL) {
+                dev_err(&client->dev, "Memory allocation failed\n");
+                return -ENOMEM;
+        }
+        i2c_set_clientdata(client, data);
+        res = sysfs_create_group(&client->dev.kobj, &m_als_gr);
+        if (res) {
+                dev_err(&client->dev, "device create file failed\n");
+                goto als_error1;
+        }
+        dev_info(&client->dev, "ALS chip found\n");
+        als_set_default_config(client);
+        mutex_init(&data->mutex);
+
+        pm_runtime_enable(&client->dev);
+        pm_runtime_get(&client->dev);
+        pm_runtime_put(&client->dev);
+
+        return res;
+als_error1:
+        i2c_set_clientdata(client, NULL);
+        kfree(data);
+        return res;
+}
+
+static int apds9802als_remove(struct i2c_client *client)
+{
+        struct als_data *data = i2c_get_clientdata(client);
+
+        als_set_power_state(client, false);
+        sysfs_remove_group(&client->dev.kobj, &m_als_gr);
+        kfree(data);
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int apds9802als_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+        als_set_power_state(client, false);
+        return 0;
+}
+
+static int apds9802als_resume(struct i2c_client *client)
+{
+        als_set_default_config(client);
+
+        pm_runtime_get(&client->dev);
+        pm_runtime_put(&client->dev);
+        return 0;
+}
+
+static int apds9802als_runtime_suspend(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+
+        als_set_power_state(client, false);
+        return 0;
+}
+
+static int apds9802als_runtime_resume(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+
+        als_set_power_state(client, true);
+        return 0;
+}
+
+static const struct dev_pm_ops apds9802als_pm_ops = {
+        .runtime_suspend = apds9802als_runtime_suspend,
+        .runtime_resume = apds9802als_runtime_resume,
+};
+
+#define APDS9802ALS_PM_OPS (&apds9802als_pm_ops)
+
+#else   /* CONFIG_PM */
+#define apds9802als_suspend NULL
+#define apds9802als_resume NULL
+#define APDS9802ALS_PM_OPS NULL
+#endif  /* CONFIG_PM */
+
+static struct i2c_device_id apds9802als_id[] = {
+        { DRIVER_NAME, 0 },
+        { }
+};
+
+MODULE_DEVICE_TABLE(i2c, apds9802als_id);
+
+static struct i2c_driver apds9802als_driver = {
+        .driver = {
+                .name = DRIVER_NAME,
+                .pm = APDS9802ALS_PM_OPS,
+        },
+        .probe = apds9802als_probe,
+        .remove = apds9802als_remove,
+        .suspend = apds9802als_suspend,
+        .resume = apds9802als_resume,
+        .id_table = apds9802als_id,
+};
+
+static int __init sensor_apds9802als_init(void)
+{
+        return i2c_add_driver(&apds9802als_driver);
+}
+
+static void  __exit sensor_apds9802als_exit(void)
+{
+        i2c_del_driver(&apds9802als_driver);
+}
+module_init(sensor_apds9802als_init);
+module_exit(sensor_apds9802als_exit);
+
+MODULE_AUTHOR("Anantha Narayanan <Anantha.Narayanan@intel.com");
+MODULE_DESCRIPTION("Avago apds9802als ALS Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/apds990x.c b/drivers/misc/apds990x.c
new file mode 100644
index 000000000000..200311fea369
--- /dev/null
+++ b/drivers/misc/apds990x.c
@@ -0,0 +1,1295 @@
+/*
+ * This file is part of the APDS990x sensor driver.
+ * Chip is combined proximity and ambient light sensor.
+ *
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+#include <linux/i2c/apds990x.h>
+
+/* Register map */
+#define APDS990X_ENABLE  0x00 /* Enable of states and interrupts */
+#define APDS990X_ATIME   0x01 /* ALS ADC time  */
+#define APDS990X_PTIME   0x02 /* Proximity ADC time  */
+#define APDS990X_WTIME   0x03 /* Wait time  */
+#define APDS990X_AILTL   0x04 /* ALS interrupt low threshold low byte */
+#define APDS990X_AILTH   0x05 /* ALS interrupt low threshold hi byte */
+#define APDS990X_AIHTL   0x06 /* ALS interrupt hi threshold low byte */
+#define APDS990X_AIHTH   0x07 /* ALS interrupt hi threshold hi byte */
+#define APDS990X_PILTL   0x08 /* Proximity interrupt low threshold low byte */
+#define APDS990X_PILTH   0x09 /* Proximity interrupt low threshold hi byte */
+#define APDS990X_PIHTL   0x0a /* Proximity interrupt hi threshold low byte */
+#define APDS990X_PIHTH   0x0b /* Proximity interrupt hi threshold hi byte */
+#define APDS990X_PERS    0x0c /* Interrupt persistence filters */
+#define APDS990X_CONFIG  0x0d /* Configuration */
+#define APDS990X_PPCOUNT 0x0e /* Proximity pulse count */
+#define APDS990X_CONTROL 0x0f /* Gain control register */
+#define APDS990X_REV     0x11 /* Revision Number */
+#define APDS990X_ID      0x12 /* Device ID */
+#define APDS990X_STATUS  0x13 /* Device status */
+#define APDS990X_CDATAL  0x14 /* Clear ADC low data register */
+#define APDS990X_CDATAH  0x15 /* Clear ADC high data register */
+#define APDS990X_IRDATAL 0x16 /* IR ADC low data register */
+#define APDS990X_IRDATAH 0x17 /* IR ADC high data register */
+#define APDS990X_PDATAL  0x18 /* Proximity ADC low data register */
+#define APDS990X_PDATAH  0x19 /* Proximity ADC high data register */
+
+/* Control */
+#define APDS990X_MAX_AGAIN      3
+
+/* Enable register */
+#define APDS990X_EN_PIEN        (0x1 << 5)
+#define APDS990X_EN_AIEN        (0x1 << 4)
+#define APDS990X_EN_WEN         (0x1 << 3)
+#define APDS990X_EN_PEN         (0x1 << 2)
+#define APDS990X_EN_AEN         (0x1 << 1)
+#define APDS990X_EN_PON         (0x1 << 0)
+#define APDS990X_EN_DISABLE_ALL 0
+
+/* Status register */
+#define APDS990X_ST_PINT        (0x1 << 5)
+#define APDS990X_ST_AINT        (0x1 << 4)
+
+/* I2C access types */
+#define APDS990x_CMD_TYPE_MASK  (0x03 << 5)
+#define APDS990x_CMD_TYPE_RB    (0x00 << 5) /* Repeated byte */
+#define APDS990x_CMD_TYPE_INC   (0x01 << 5) /* Auto increment */
+#define APDS990x_CMD_TYPE_SPE   (0x03 << 5) /* Special function */
+
+#define APDS990x_ADDR_SHIFT     0
+#define APDS990x_CMD            0x80
+
+/* Interrupt ack commands */
+#define APDS990X_INT_ACK_ALS    0x6
+#define APDS990X_INT_ACK_PS     0x5
+#define APDS990X_INT_ACK_BOTH   0x7
+
+/* ptime */
+#define APDS990X_PTIME_DEFAULT  0xff /* Recommended conversion time 2.7ms*/
+
+/* wtime */
+#define APDS990X_WTIME_DEFAULT  0xee /* ~50ms wait time */
+
+#define APDS990X_TIME_TO_ADC    1024 /* One timetick as ADC count value */
+
+/* Persistence */
+#define APDS990X_APERS_SHIFT    0
+#define APDS990X_PPERS_SHIFT    4
+
+/* Supported ID:s */
+#define APDS990X_ID_0           0x0
+#define APDS990X_ID_4           0x4
+#define APDS990X_ID_29          0x29
+
+/* pgain and pdiode settings */
+#define APDS_PGAIN_1X          0x0
+#define APDS_PDIODE_IR         0x2
+
+#define APDS990X_LUX_OUTPUT_SCALE 10
+
+/* Reverse chip factors for threshold calculation */
+struct reverse_factors {
+        u32 afactor;
+        int cf1;
+        int irf1;
+        int cf2;
+        int irf2;
+};
+
+struct apds990x_chip {
+        struct apds990x_platform_data   *pdata;
+        struct i2c_client               *client;
+        struct mutex                    mutex; /* avoid parallel access */
+        struct regulator_bulk_data      regs[2];
+        wait_queue_head_t               wait;
+
+        int     prox_en;
+        bool    prox_continuous_mode;
+        bool    lux_wait_fresh_res;
+
+        /* Chip parameters */
+        struct  apds990x_chip_factors   cf;
+        struct  reverse_factors         rcf;
+        u16     atime;          /* als integration time */
+        u16     arate;          /* als reporting rate */
+        u16     a_max_result;   /* Max possible ADC value with current atime */
+        u8      again_meas;     /* Gain used in last measurement */
+        u8      again_next;     /* Next calculated gain */
+        u8      pgain;
+        u8      pdiode;
+        u8      pdrive;
+        u8      lux_persistence;
+        u8      prox_persistence;
+
+        u32     lux_raw;
+        u32     lux;
+        u16     lux_clear;
+        u16     lux_ir;
+        u16     lux_calib;
+        u32     lux_thres_hi;
+        u32     lux_thres_lo;
+
+        u32     prox_thres;
+        u16     prox_data;
+        u16     prox_calib;
+
+        char    chipname[10];
+        u8      revision;
+};
+
+#define APDS_CALIB_SCALER               8192
+#define APDS_LUX_NEUTRAL_CALIB_VALUE    (1 * APDS_CALIB_SCALER)
+#define APDS_PROX_NEUTRAL_CALIB_VALUE   (1 * APDS_CALIB_SCALER)
+
+#define APDS_PROX_DEF_THRES             600
+#define APDS_PROX_HYSTERESIS            50
+#define APDS_LUX_DEF_THRES_HI           101
+#define APDS_LUX_DEF_THRES_LO           100
+#define APDS_DEFAULT_PROX_PERS          1
+
+#define APDS_TIMEOUT                    2000
+#define APDS_STARTUP_DELAY              25000 /* us */
+#define APDS_RANGE                      65535
+#define APDS_PROX_RANGE                 1023
+#define APDS_LUX_GAIN_LO_LIMIT          100
+#define APDS_LUX_GAIN_LO_LIMIT_STRICT   25
+
+#define TIMESTEP                        87 /* 2.7ms is about 87 / 32 */
+#define TIME_STEP_SCALER                32
+
+#define APDS_LUX_AVERAGING_TIME         50 /* tolerates 50/60Hz ripple */
+#define APDS_LUX_DEFAULT_RATE           200
+
+static const u8 again[] = {1, 8, 16, 120}; /* ALS gain steps */
+static const u8 ir_currents[]   = {100, 50, 25, 12}; /* IRled currents in mA */
+
+/* Following two tables must match i.e 10Hz rate means 1 as persistence value */
+static const u16 arates_hz[] = {10, 5, 2, 1};
+static const u8 apersis[] = {1, 2, 4, 5};
+
+/* Regulators */
+static const char reg_vcc[] = "Vdd";
+static const char reg_vled[] = "Vled";
+
+static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data)
+{
+        struct i2c_client *client = chip->client;
+        s32 ret;
+
+        reg &= ~APDS990x_CMD_TYPE_MASK;
+        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB;
+
+        ret = i2c_smbus_read_byte_data(client, reg);
+        *data = ret;
+        return (int)ret;
+}
+
+static int apds990x_read_word(struct apds990x_chip *chip, u8 reg, u16 *data)
+{
+        struct i2c_client *client = chip->client;
+        s32 ret;
+
+        reg &= ~APDS990x_CMD_TYPE_MASK;
+        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC;
+
+        ret = i2c_smbus_read_word_data(client, reg);
+        *data = ret;
+        return (int)ret;
+}
+
+static int apds990x_write_byte(struct apds990x_chip *chip, u8 reg, u8 data)
+{
+        struct i2c_client *client = chip->client;
+        s32 ret;
+
+        reg &= ~APDS990x_CMD_TYPE_MASK;
+        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB;
+
+        ret = i2c_smbus_write_byte_data(client, reg, data);
+        return (int)ret;
+}
+
+static int apds990x_write_word(struct apds990x_chip *chip, u8 reg, u16 data)
+{
+        struct i2c_client *client = chip->client;
+        s32 ret;
+
+        reg &= ~APDS990x_CMD_TYPE_MASK;
+        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC;
+
+        ret = i2c_smbus_write_word_data(client, reg, data);
+        return (int)ret;
+}
+
+static int apds990x_mode_on(struct apds990x_chip *chip)
+{
+        /* ALS is mandatory, proximity optional */
+        u8 reg = APDS990X_EN_AIEN | APDS990X_EN_PON | APDS990X_EN_AEN |
+                APDS990X_EN_WEN;
+
+        if (chip->prox_en)
+                reg |= APDS990X_EN_PIEN | APDS990X_EN_PEN;
+
+        return apds990x_write_byte(chip, APDS990X_ENABLE, reg);
+}
+
+static u16 apds990x_lux_to_threshold(struct apds990x_chip *chip, u32 lux)
+{
+        u32 thres;
+        u32 cpl;
+        u32 ir;
+
+        if (lux == 0)
+                return 0;
+        else if (lux == APDS_RANGE)
+                return APDS_RANGE;
+
+        /*
+         * Reported LUX value is a combination of the IR and CLEAR channel
+         * values. However, interrupt threshold is only for clear channel.
+         * This function approximates needed HW threshold value for a given
+         * LUX value in the current lightning type.
+         * IR level compared to visible light varies heavily depending on the
+         * source of the light
+         *
+         * Calculate threshold value for the next measurement period.
+         * Math: threshold = lux * cpl where
+         * cpl = atime * again / (glass_attenuation * device_factor)
+         * (count-per-lux)
+         *
+         * First remove calibration. Division by four is to avoid overflow
+         */
+        lux = lux * (APDS_CALIB_SCALER / 4) / (chip->lux_calib / 4);
+
+        /* Multiplication by 64 is to increase accuracy */
+        cpl = ((u32)chip->atime * (u32)again[chip->again_next] *
+                APDS_PARAM_SCALE * 64) / (chip->cf.ga * chip->cf.df);
+
+        thres = lux * cpl / 64;
+        /*
+         * Convert IR light from the latest result to match with
+         * new gain step. This helps to adapt with the current
+         * source of light.
+         */
+        ir = (u32)chip->lux_ir * (u32)again[chip->again_next] /
+                (u32)again[chip->again_meas];
+
+        /*
+         * Compensate count with IR light impact
+         * IAC1 > IAC2 (see apds990x_get_lux for formulas)
+         */
+        if (chip->lux_clear * APDS_PARAM_SCALE >=
+                chip->rcf.afactor * chip->lux_ir)
+                thres = (chip->rcf.cf1 * thres + chip->rcf.irf1 * ir) /
+                        APDS_PARAM_SCALE;
+        else
+                thres = (chip->rcf.cf2 * thres + chip->rcf.irf2 * ir) /
+                        APDS_PARAM_SCALE;
+
+        if (thres >= chip->a_max_result)
+                thres = chip->a_max_result - 1;
+        return thres;
+}
+
+static inline int apds990x_set_atime(struct apds990x_chip *chip, u32 time_ms)
+{
+        u8 reg_value;
+
+        chip->atime = time_ms;
+        /* Formula is specified in the data sheet */
+        reg_value = 256 - ((time_ms * TIME_STEP_SCALER) / TIMESTEP);
+        /* Calculate max ADC value for given integration time */
+        chip->a_max_result = (u16)(256 - reg_value) * APDS990X_TIME_TO_ADC;
+        return apds990x_write_byte(chip, APDS990X_ATIME, reg_value);
+}
+
+/* Called always with mutex locked */
+static int apds990x_refresh_pthres(struct apds990x_chip *chip, int data)
+{
+        int ret, lo, hi;
+
+        /* If the chip is not in use, don't try to access it */
+        if (pm_runtime_suspended(&chip->client->dev))
+                return 0;
+
+        if (data < chip->prox_thres) {
+                lo = 0;
+                hi = chip->prox_thres;
+        } else {
+                lo = chip->prox_thres - APDS_PROX_HYSTERESIS;
+                if (chip->prox_continuous_mode)
+                        hi = chip->prox_thres;
+                else
+                        hi = APDS_RANGE;
+        }
+
+        ret = apds990x_write_word(chip, APDS990X_PILTL, lo);
+        ret |= apds990x_write_word(chip, APDS990X_PIHTL, hi);
+        return ret;
+}
+
+/* Called always with mutex locked */
+static int apds990x_refresh_athres(struct apds990x_chip *chip)
+{
+        int ret;
+        /* If the chip is not in use, don't try to access it */
+        if (pm_runtime_suspended(&chip->client->dev))
+                return 0;
+
+        ret = apds990x_write_word(chip, APDS990X_AILTL,
+                        apds990x_lux_to_threshold(chip, chip->lux_thres_lo));
+        ret |= apds990x_write_word(chip, APDS990X_AIHTL,
+                        apds990x_lux_to_threshold(chip, chip->lux_thres_hi));
+
+        return ret;
+}
+
+/* Called always with mutex locked */
+static void apds990x_force_a_refresh(struct apds990x_chip *chip)
+{
+        /* This will force ALS interrupt after the next measurement. */
+        apds990x_write_word(chip, APDS990X_AILTL, APDS_LUX_DEF_THRES_LO);
+        apds990x_write_word(chip, APDS990X_AIHTL, APDS_LUX_DEF_THRES_HI);
+}
+
+/* Called always with mutex locked */
+static void apds990x_force_p_refresh(struct apds990x_chip *chip)
+{
+        /* This will force proximity interrupt after the next measurement. */
+        apds990x_write_word(chip, APDS990X_PILTL, APDS_PROX_DEF_THRES - 1);
+        apds990x_write_word(chip, APDS990X_PIHTL, APDS_PROX_DEF_THRES);
+}
+
+/* Called always with mutex locked */
+static int apds990x_calc_again(struct apds990x_chip *chip)
+{
+        int curr_again = chip->again_meas;
+        int next_again = chip->again_meas;
+        int ret = 0;
+
+        /* Calculate suitable als gain */
+        if (chip->lux_clear == chip->a_max_result)
+                next_again -= 2; /* ALS saturated. Decrease gain by 2 steps */
+        else if (chip->lux_clear > chip->a_max_result / 2)
+                next_again--;
+        else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT)
+                next_again += 2; /* Too dark. Increase gain by 2 steps */
+        else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT)
+                next_again++;
+
+        /* Limit gain to available range */
+        if (next_again < 0)
+                next_again = 0;
+        else if (next_again > APDS990X_MAX_AGAIN)
+                next_again = APDS990X_MAX_AGAIN;
+
+        /* Let's check can we trust the measured result */
+        if (chip->lux_clear == chip->a_max_result)
+                /* Result can be totally garbage due to saturation */
+                ret = -ERANGE;
+        else if (next_again != curr_again &&
+                chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT)
+                /*
+                 * Gain is changed and measurement result is very small.
+                 * Result can be totally garbage due to underflow
+                 */
+                ret = -ERANGE;
+
+        chip->again_next = next_again;
+        apds990x_write_byte(chip, APDS990X_CONTROL,
+                        (chip->pdrive << 6) |
+                        (chip->pdiode << 4) |
+                        (chip->pgain << 2) |
+                        (chip->again_next << 0));
+
+        /*
+         * Error means bad result -> re-measurement is needed. The forced
+         * refresh uses fastest possible persistence setting to get result
+         * as soon as possible.
+         */
+        if (ret < 0)
+                apds990x_force_a_refresh(chip);
+        else
+                apds990x_refresh_athres(chip);
+
+        return ret;
+}
+
+/* Called always with mutex locked */
+static int apds990x_get_lux(struct apds990x_chip *chip, int clear, int ir)
+{
+        int iac, iac1, iac2; /* IR adjusted counts */
+        u32 lpc; /* Lux per count */
+
+        /* Formulas:
+         * iac1 = CF1 * CLEAR_CH - IRF1 * IR_CH
+         * iac2 = CF2 * CLEAR_CH - IRF2 * IR_CH
+         */
+        iac1 = (chip->cf.cf1 * clear - chip->cf.irf1 * ir) / APDS_PARAM_SCALE;
+        iac2 = (chip->cf.cf2 * clear - chip->cf.irf2 * ir) / APDS_PARAM_SCALE;
+
+        iac = max(iac1, iac2);
+        iac = max(iac, 0);
+
+        lpc = APDS990X_LUX_OUTPUT_SCALE * (chip->cf.df * chip->cf.ga) /
+                (u32)(again[chip->again_meas] * (u32)chip->atime);
+
+        return (iac * lpc) / APDS_PARAM_SCALE;
+}
+
+static int apds990x_ack_int(struct apds990x_chip *chip, u8 mode)
+{
+        struct i2c_client *client = chip->client;
+        s32 ret;
+        u8 reg = APDS990x_CMD | APDS990x_CMD_TYPE_SPE;
+
+        switch (mode & (APDS990X_ST_AINT | APDS990X_ST_PINT)) {
+        case APDS990X_ST_AINT:
+                reg |= APDS990X_INT_ACK_ALS;
+                break;
+        case APDS990X_ST_PINT:
+                reg |= APDS990X_INT_ACK_PS;
+                break;
+        default:
+                reg |= APDS990X_INT_ACK_BOTH;
+                break;
+        }
+
+        ret = i2c_smbus_read_byte_data(client, reg);
+        return (int)ret;
+}
+
+static irqreturn_t apds990x_irq(int irq, void *data)
+{
+        struct apds990x_chip *chip = data;
+        u8 status;
+
+        apds990x_read_byte(chip, APDS990X_STATUS, &status);
+        apds990x_ack_int(chip, status);
+
+        mutex_lock(&chip->mutex);
+        if (!pm_runtime_suspended(&chip->client->dev)) {
+                if (status & APDS990X_ST_AINT) {
+                        apds990x_read_word(chip, APDS990X_CDATAL,
+                                        &chip->lux_clear);
+                        apds990x_read_word(chip, APDS990X_IRDATAL,
+                                        &chip->lux_ir);
+                        /* Store used gain for calculations */
+                        chip->again_meas = chip->again_next;
+
+                        chip->lux_raw = apds990x_get_lux(chip,
+                                                        chip->lux_clear,
+                                                        chip->lux_ir);
+
+                        if (apds990x_calc_again(chip) == 0) {
+                                /* Result is valid */
+                                chip->lux = chip->lux_raw;
+                                chip->lux_wait_fresh_res = false;
+                                wake_up(&chip->wait);
+                                sysfs_notify(&chip->client->dev.kobj,
+                                        NULL, "lux0_input");
+                        }
+                }
+
+                if ((status & APDS990X_ST_PINT) && chip->prox_en) {
+                        u16 clr_ch;
+
+                        apds990x_read_word(chip, APDS990X_CDATAL, &clr_ch);
+                        /*
+                         * If ALS channel is saturated at min gain,
+                         * proximity gives false posivite values.
+                         * Just ignore them.
+                         */
+                        if (chip->again_meas == 0 &&
+                                clr_ch == chip->a_max_result)
+                                chip->prox_data = 0;
+                        else
+                                apds990x_read_word(chip,
+                                                APDS990X_PDATAL,
+                                                &chip->prox_data);
+
+                        apds990x_refresh_pthres(chip, chip->prox_data);
+                        if (chip->prox_data < chip->prox_thres)
+                                chip->prox_data = 0;
+                        else if (!chip->prox_continuous_mode)
+                                chip->prox_data = APDS_PROX_RANGE;
+                        sysfs_notify(&chip->client->dev.kobj,
+                                NULL, "prox0_raw");
+                }
+        }
+        mutex_unlock(&chip->mutex);
+        return IRQ_HANDLED;
+}
+
+static int apds990x_configure(struct apds990x_chip *chip)
+{
+        /* It is recommended to use disabled mode during these operations */
+        apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL);
+
+        /* conversion and wait times for different state machince states */
+        apds990x_write_byte(chip, APDS990X_PTIME, APDS990X_PTIME_DEFAULT);
+        apds990x_write_byte(chip, APDS990X_WTIME, APDS990X_WTIME_DEFAULT);
+        apds990x_set_atime(chip, APDS_LUX_AVERAGING_TIME);
+
+        apds990x_write_byte(chip, APDS990X_CONFIG, 0);
+
+        /* Persistence levels */
+        apds990x_write_byte(chip, APDS990X_PERS,
+                        (chip->lux_persistence << APDS990X_APERS_SHIFT) |
+                        (chip->prox_persistence << APDS990X_PPERS_SHIFT));
+
+        apds990x_write_byte(chip, APDS990X_PPCOUNT, chip->pdata->ppcount);
+
+        /* Start with relatively small gain */
+        chip->again_meas = 1;
+        chip->again_next = 1;
+        apds990x_write_byte(chip, APDS990X_CONTROL,
+                        (chip->pdrive << 6) |
+                        (chip->pdiode << 4) |
+                        (chip->pgain << 2) |
+                        (chip->again_next << 0));
+        return 0;
+}
+
+static int apds990x_detect(struct apds990x_chip *chip)
+{
+        struct i2c_client *client = chip->client;
+        int ret;
+        u8 id;
+
+        ret = apds990x_read_byte(chip, APDS990X_ID, &id);
+        if (ret < 0) {
+                dev_err(&client->dev, "ID read failed\n");
+                return ret;
+        }
+
+        ret = apds990x_read_byte(chip, APDS990X_REV, &chip->revision);
+        if (ret < 0) {
+                dev_err(&client->dev, "REV read failed\n");
+                return ret;
+        }
+
+        switch (id) {
+        case APDS990X_ID_0:
+        case APDS990X_ID_4:
+        case APDS990X_ID_29:
+                snprintf(chip->chipname, sizeof(chip->chipname), "APDS-990x");
+                break;
+        default:
+                ret = -ENODEV;
+                break;
+        }
+        return ret;
+}
+
+static int apds990x_chip_on(struct apds990x_chip *chip)
+{
+        int err  = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
+                                        chip->regs);
+        if (err < 0)
+                return err;
+
+        usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY);
+
+        /* Refresh all configs in case of regulators were off */
+        chip->prox_data = 0;
+        apds990x_configure(chip);
+        apds990x_mode_on(chip);
+        return 0;
+}
+
+static int apds990x_chip_off(struct apds990x_chip *chip)
+{
+        apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL);
+        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
+        return 0;
+}
+
+static ssize_t apds990x_lux_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip = dev_get_drvdata(dev);
+        ssize_t ret;
+        u32 result;
+        long timeout;
+
+        if (pm_runtime_suspended(dev))
+                return -EIO;
+
+        timeout = wait_event_interruptible_timeout(chip->wait,
+                                                !chip->lux_wait_fresh_res,
+                                                msecs_to_jiffies(APDS_TIMEOUT));
+        if (!timeout)
+                return -EIO;
+
+        mutex_lock(&chip->mutex);
+        result = (chip->lux * chip->lux_calib) / APDS_CALIB_SCALER;
+        if (result > (APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE))
+                result = APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE;
+
+        ret = sprintf(buf, "%d.%d\n",
+                result / APDS990X_LUX_OUTPUT_SCALE,
+                result % APDS990X_LUX_OUTPUT_SCALE);
+        mutex_unlock(&chip->mutex);
+        return ret;
+}
+
+static DEVICE_ATTR(lux0_input, S_IRUGO, apds990x_lux_show, NULL);
+
+static ssize_t apds990x_lux_range_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%u\n", APDS_RANGE);
+}
+
+static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, apds990x_lux_range_show, NULL);
+
+static ssize_t apds990x_lux_calib_format_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%u\n", APDS_CALIB_SCALER);
+}
+
+static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
+                apds990x_lux_calib_format_show, NULL);
+
+static ssize_t apds990x_lux_calib_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip = dev_get_drvdata(dev);
+
+        return sprintf(buf, "%u\n", chip->lux_calib);
+}
+
+static ssize_t apds990x_lux_calib_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip = dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        if (chip->lux_calib > APDS_RANGE)
+                return -EINVAL;
+
+        chip->lux_calib = value;
+
+        return len;
+}
+
+static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, apds990x_lux_calib_show,
+                apds990x_lux_calib_store);
+
+static ssize_t apds990x_rate_avail(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        int i;
+        int pos = 0;
+        for (i = 0; i < ARRAY_SIZE(arates_hz); i++)
+                pos += sprintf(buf + pos, "%d ", arates_hz[i]);
+        sprintf(buf + pos - 1, "\n");
+        return pos;
+}
+
+static ssize_t apds990x_rate_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->arate);
+}
+
+static int apds990x_set_arate(struct apds990x_chip *chip, int rate)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(arates_hz); i++)
+                if (rate >= arates_hz[i])
+                        break;
+
+        if (i == ARRAY_SIZE(arates_hz))
+                return -EINVAL;
+
+        /* Pick up corresponding persistence value */
+        chip->lux_persistence = apersis[i];
+        chip->arate = arates_hz[i];
+
+        /* If the chip is not in use, don't try to access it */
+        if (pm_runtime_suspended(&chip->client->dev))
+                return 0;
+
+        /* Persistence levels */
+        return apds990x_write_byte(chip, APDS990X_PERS,
+                        (chip->lux_persistence << APDS990X_APERS_SHIFT) |
+                        (chip->prox_persistence << APDS990X_PPERS_SHIFT));
+}
+
+static ssize_t apds990x_rate_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+        int ret;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        ret = apds990x_set_arate(chip, value);
+        mutex_unlock(&chip->mutex);
+
+        if (ret < 0)
+                return ret;
+        return len;
+}
+
+static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, apds990x_rate_avail, NULL);
+
+static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, apds990x_rate_show,
+                                                 apds990x_rate_store);
+
+static ssize_t apds990x_prox_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        ssize_t ret;
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        if (pm_runtime_suspended(dev) || !chip->prox_en)
+                return -EIO;
+
+        mutex_lock(&chip->mutex);
+        ret = sprintf(buf, "%d\n", chip->prox_data);
+        mutex_unlock(&chip->mutex);
+        return ret;
+}
+
+static DEVICE_ATTR(prox0_raw, S_IRUGO, apds990x_prox_show, NULL);
+
+static ssize_t apds990x_prox_range_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%u\n", APDS_PROX_RANGE);
+}
+
+static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, apds990x_prox_range_show, NULL);
+
+static ssize_t apds990x_prox_enable_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->prox_en);
+}
+
+static ssize_t apds990x_prox_enable_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+
+        if (!chip->prox_en)
+                chip->prox_data = 0;
+
+        if (value)
+                chip->prox_en++;
+        else if (chip->prox_en > 0)
+                chip->prox_en--;
+
+        if (!pm_runtime_suspended(dev))
+                apds990x_mode_on(chip);
+        mutex_unlock(&chip->mutex);
+        return len;
+}
+
+static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, apds990x_prox_enable_show,
+                                                   apds990x_prox_enable_store);
+
+static const char reporting_modes[][9] = {"trigger", "periodic"};
+
+static ssize_t apds990x_prox_reporting_mode_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%s\n",
+                reporting_modes[!!chip->prox_continuous_mode]);
+}
+
+static ssize_t apds990x_prox_reporting_mode_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+
+        if (sysfs_streq(buf, reporting_modes[0]))
+                chip->prox_continuous_mode = 0;
+        else if (sysfs_streq(buf, reporting_modes[1]))
+                chip->prox_continuous_mode = 1;
+        else
+                return -EINVAL;
+        return len;
+}
+
+static DEVICE_ATTR(prox0_reporting_mode, S_IRUGO | S_IWUSR,
+                apds990x_prox_reporting_mode_show,
+                apds990x_prox_reporting_mode_store);
+
+static ssize_t apds990x_prox_reporting_avail_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%s %s\n", reporting_modes[0], reporting_modes[1]);
+}
+
+static DEVICE_ATTR(prox0_reporting_mode_avail, S_IRUGO | S_IWUSR,
+                apds990x_prox_reporting_avail_show, NULL);
+
+
+static ssize_t apds990x_lux_thresh_above_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->lux_thres_hi);
+}
+
+static ssize_t apds990x_lux_thresh_below_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->lux_thres_lo);
+}
+
+static ssize_t apds990x_set_lux_thresh(struct apds990x_chip *chip, u32 *target,
+                                const char *buf)
+{
+        int ret = 0;
+        unsigned long thresh;
+
+        if (strict_strtoul(buf, 0, &thresh))
+                return -EINVAL;
+
+        if (thresh > APDS_RANGE)
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        *target = thresh;
+        /*
+         * Don't update values in HW if we are still waiting for
+         * first interrupt to come after device handle open call.
+         */
+        if (!chip->lux_wait_fresh_res)
+                apds990x_refresh_athres(chip);
+        mutex_unlock(&chip->mutex);
+        return ret;
+
+}
+
+static ssize_t apds990x_lux_thresh_above_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_hi, buf);
+        if (ret < 0)
+                return ret;
+        return len;
+}
+
+static ssize_t apds990x_lux_thresh_below_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_lo, buf);
+        if (ret < 0)
+                return ret;
+        return len;
+}
+
+static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
+                apds990x_lux_thresh_above_show,
+                apds990x_lux_thresh_above_store);
+
+static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
+                apds990x_lux_thresh_below_show,
+                apds990x_lux_thresh_below_store);
+
+static ssize_t apds990x_prox_threshold_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->prox_thres);
+}
+
+static ssize_t apds990x_prox_threshold_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        if ((value > APDS_RANGE) || (value == 0) ||
+                (value < APDS_PROX_HYSTERESIS))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        chip->prox_thres = value;
+
+        apds990x_force_p_refresh(chip);
+        mutex_unlock(&chip->mutex);
+        return len;
+}
+
+static DEVICE_ATTR(prox0_thresh_above_value, S_IRUGO | S_IWUSR,
+                apds990x_prox_threshold_show,
+                apds990x_prox_threshold_store);
+
+static ssize_t apds990x_power_state_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
+        return 0;
+}
+
+static ssize_t apds990x_power_state_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+        if (value) {
+                pm_runtime_get_sync(dev);
+                mutex_lock(&chip->mutex);
+                chip->lux_wait_fresh_res = true;
+                apds990x_force_a_refresh(chip);
+                apds990x_force_p_refresh(chip);
+                mutex_unlock(&chip->mutex);
+        } else {
+                if (!pm_runtime_suspended(dev))
+                        pm_runtime_put(dev);
+        }
+        return len;
+}
+
+static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
+                apds990x_power_state_show,
+                apds990x_power_state_store);
+
+static ssize_t apds990x_chip_id_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct apds990x_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%s %d\n", chip->chipname, chip->revision);
+}
+
+static DEVICE_ATTR(chip_id, S_IRUGO, apds990x_chip_id_show, NULL);
+
+static struct attribute *sysfs_attrs_ctrl[] = {
+        &dev_attr_lux0_calibscale.attr,
+        &dev_attr_lux0_calibscale_default.attr,
+        &dev_attr_lux0_input.attr,
+        &dev_attr_lux0_sensor_range.attr,
+        &dev_attr_lux0_rate.attr,
+        &dev_attr_lux0_rate_avail.attr,
+        &dev_attr_lux0_thresh_above_value.attr,
+        &dev_attr_lux0_thresh_below_value.attr,
+        &dev_attr_prox0_raw_en.attr,
+        &dev_attr_prox0_raw.attr,
+        &dev_attr_prox0_sensor_range.attr,
+        &dev_attr_prox0_thresh_above_value.attr,
+        &dev_attr_prox0_reporting_mode.attr,
+        &dev_attr_prox0_reporting_mode_avail.attr,
+        &dev_attr_chip_id.attr,
+        &dev_attr_power_state.attr,
+        NULL
+};
+
+static struct attribute_group apds990x_attribute_group[] = {
+        {.attrs = sysfs_attrs_ctrl },
+};
+
+static int __devinit apds990x_probe(struct i2c_client *client,
+                                const struct i2c_device_id *id)
+{
+        struct apds990x_chip *chip;
+        int err;
+
+        chip = kzalloc(sizeof *chip, GFP_KERNEL);
+        if (!chip)
+                return -ENOMEM;
+
+        i2c_set_clientdata(client, chip);
+        chip->client  = client;
+
+        init_waitqueue_head(&chip->wait);
+        mutex_init(&chip->mutex);
+        chip->pdata     = client->dev.platform_data;
+
+        if (chip->pdata == NULL) {
+                dev_err(&client->dev, "platform data is mandatory\n");
+                err = -EINVAL;
+                goto fail1;
+        }
+
+        if (chip->pdata->cf.ga == 0) {
+                /* set uncovered sensor default parameters */
+                chip->cf.ga = 1966; /* 0.48 * APDS_PARAM_SCALE */
+                chip->cf.cf1 = 4096; /* 1.00 * APDS_PARAM_SCALE */
+                chip->cf.irf1 = 9134; /* 2.23 * APDS_PARAM_SCALE */
+                chip->cf.cf2 = 2867; /* 0.70 * APDS_PARAM_SCALE */
+                chip->cf.irf2 = 5816; /* 1.42 * APDS_PARAM_SCALE */
+                chip->cf.df = 52;
+        } else {
+                chip->cf = chip->pdata->cf;
+        }
+
+        /* precalculate inverse chip factors for threshold control */
+        chip->rcf.afactor =
+                (chip->cf.irf1 - chip->cf.irf2) * APDS_PARAM_SCALE /
+                (chip->cf.cf1 - chip->cf.cf2);
+        chip->rcf.cf1 = APDS_PARAM_SCALE * APDS_PARAM_SCALE /
+                chip->cf.cf1;
+        chip->rcf.irf1 = chip->cf.irf1 * APDS_PARAM_SCALE /
+                chip->cf.cf1;
+        chip->rcf.cf2 = APDS_PARAM_SCALE * APDS_PARAM_SCALE /
+                chip->cf.cf2;
+        chip->rcf.irf2 = chip->cf.irf2 * APDS_PARAM_SCALE /
+                chip->cf.cf2;
+
+        /* Set something to start with */
+        chip->lux_thres_hi = APDS_LUX_DEF_THRES_HI;
+        chip->lux_thres_lo = APDS_LUX_DEF_THRES_LO;
+        chip->lux_calib = APDS_LUX_NEUTRAL_CALIB_VALUE;
+
+        chip->prox_thres = APDS_PROX_DEF_THRES;
+        chip->pdrive = chip->pdata->pdrive;
+        chip->pdiode = APDS_PDIODE_IR;
+        chip->pgain = APDS_PGAIN_1X;
+        chip->prox_calib = APDS_PROX_NEUTRAL_CALIB_VALUE;
+        chip->prox_persistence = APDS_DEFAULT_PROX_PERS;
+        chip->prox_continuous_mode = false;
+
+        chip->regs[0].supply = reg_vcc;
+        chip->regs[1].supply = reg_vled;
+
+        err = regulator_bulk_get(&client->dev,
+                                 ARRAY_SIZE(chip->regs), chip->regs);
+        if (err < 0) {
+                dev_err(&client->dev, "Cannot get regulators\n");
+                goto fail1;
+        }
+
+        err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), chip->regs);
+        if (err < 0) {
+                dev_err(&client->dev, "Cannot enable regulators\n");
+                goto fail2;
+        }
+
+        usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY);
+
+        err = apds990x_detect(chip);
+        if (err < 0) {
+                dev_err(&client->dev, "APDS990X not found\n");
+                goto fail3;
+        }
+
+        pm_runtime_set_active(&client->dev);
+
+        apds990x_configure(chip);
+        apds990x_set_arate(chip, APDS_LUX_DEFAULT_RATE);
+        apds990x_mode_on(chip);
+
+        pm_runtime_enable(&client->dev);
+
+        if (chip->pdata->setup_resources) {
+                err = chip->pdata->setup_resources();
+                if (err) {
+                        err = -EINVAL;
+                        goto fail3;
+                }
+        }
+
+        err = sysfs_create_group(&chip->client->dev.kobj,
+                                apds990x_attribute_group);
+        if (err < 0) {
+                dev_err(&chip->client->dev, "Sysfs registration failed\n");
+                goto fail4;
+        }
+
+        err = request_threaded_irq(client->irq, NULL,
+                                apds990x_irq,
+                                IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW |
+                                IRQF_ONESHOT,
+                                "apds990x", chip);
+        if (err) {
+                dev_err(&client->dev, "could not get IRQ %d\n",
+                        client->irq);
+                goto fail5;
+        }
+        return err;
+fail5:
+        sysfs_remove_group(&chip->client->dev.kobj,
+                        &apds990x_attribute_group[0]);
+fail4:
+        if (chip->pdata && chip->pdata->release_resources)
+                chip->pdata->release_resources();
+fail3:
+        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
+fail2:
+        regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
+fail1:
+        kfree(chip);
+        return err;
+}
+
+static int __devexit apds990x_remove(struct i2c_client *client)
+{
+        struct apds990x_chip *chip = i2c_get_clientdata(client);
+
+        free_irq(client->irq, chip);
+        sysfs_remove_group(&chip->client->dev.kobj,
+                        apds990x_attribute_group);
+
+        if (chip->pdata && chip->pdata->release_resources)
+                chip->pdata->release_resources();
+
+        if (!pm_runtime_suspended(&client->dev))
+                apds990x_chip_off(chip);
+
+        pm_runtime_disable(&client->dev);
+        pm_runtime_set_suspended(&client->dev);
+
+        regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
+
+        kfree(chip);
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int apds990x_suspend(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct apds990x_chip *chip = i2c_get_clientdata(client);
+
+        apds990x_chip_off(chip);
+        return 0;
+}
+
+static int apds990x_resume(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct apds990x_chip *chip = i2c_get_clientdata(client);
+
+        /*
+         * If we were enabled at suspend time, it is expected
+         * everything works nice and smoothly. Chip_on is enough
+         */
+        apds990x_chip_on(chip);
+
+        return 0;
+}
+#else
+#define apds990x_suspend  NULL
+#define apds990x_resume   NULL
+#define apds990x_shutdown NULL
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int apds990x_runtime_suspend(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct apds990x_chip *chip = i2c_get_clientdata(client);
+
+        apds990x_chip_off(chip);
+        return 0;
+}
+
+static int apds990x_runtime_resume(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct apds990x_chip *chip = i2c_get_clientdata(client);
+
+        apds990x_chip_on(chip);
+        return 0;
+}
+
+#endif
+
+static const struct i2c_device_id apds990x_id[] = {
+        {"apds990x", 0 },
+        {}
+};
+
+MODULE_DEVICE_TABLE(i2c, apds990x_id);
+
+static const struct dev_pm_ops apds990x_pm_ops = {
+        SET_SYSTEM_SLEEP_PM_OPS(apds990x_suspend, apds990x_resume)
+        SET_RUNTIME_PM_OPS(apds990x_runtime_suspend,
+                        apds990x_runtime_resume,
+                        NULL)
+};
+
+static struct i2c_driver apds990x_driver = {
+        .driver  = {
+                .name   = "apds990x",
+                .owner  = THIS_MODULE,
+                .pm     = &apds990x_pm_ops,
+        },
+        .probe    = apds990x_probe,
+        .remove   = __devexit_p(apds990x_remove),
+        .id_table = apds990x_id,
+};
+
+static int __init apds990x_init(void)
+{
+        return i2c_add_driver(&apds990x_driver);
+}
+
+static void __exit apds990x_exit(void)
+{
+        i2c_del_driver(&apds990x_driver);
+}
+
+MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor");
+MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
+MODULE_LICENSE("GPL v2");
+
+module_init(apds990x_init);
+module_exit(apds990x_exit);
diff --git a/drivers/misc/bh1770glc.c b/drivers/misc/bh1770glc.c
new file mode 100644
index 000000000000..cee632e645e1
--- /dev/null
+++ b/drivers/misc/bh1770glc.c
@@ -0,0 +1,1413 @@
+/*
+ * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver.
+ * Chip is combined proximity and ambient light sensor.
+ *
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/i2c/bh1770glc.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+
+#define BH1770_ALS_CONTROL      0x80 /* ALS operation mode control */
+#define BH1770_PS_CONTROL       0x81 /* PS operation mode control */
+#define BH1770_I_LED            0x82 /* active LED and LED1, LED2 current */
+#define BH1770_I_LED3           0x83 /* LED3 current setting */
+#define BH1770_ALS_PS_MEAS      0x84 /* Forced mode trigger */
+#define BH1770_PS_MEAS_RATE     0x85 /* PS meas. rate at stand alone mode */
+#define BH1770_ALS_MEAS_RATE    0x86 /* ALS meas. rate at stand alone mode */
+#define BH1770_PART_ID          0x8a /* Part number and revision ID */
+#define BH1770_MANUFACT_ID      0x8b /* Manufacturerer ID */
+#define BH1770_ALS_DATA_0       0x8c /* ALS DATA low byte */
+#define BH1770_ALS_DATA_1       0x8d /* ALS DATA high byte */
+#define BH1770_ALS_PS_STATUS    0x8e /* Measurement data and int status */
+#define BH1770_PS_DATA_LED1     0x8f /* PS data from LED1 */
+#define BH1770_PS_DATA_LED2     0x90 /* PS data from LED2 */
+#define BH1770_PS_DATA_LED3     0x91 /* PS data from LED3 */
+#define BH1770_INTERRUPT        0x92 /* Interrupt setting */
+#define BH1770_PS_TH_LED1       0x93 /* PS interrupt threshold for LED1 */
+#define BH1770_PS_TH_LED2       0x94 /* PS interrupt threshold for LED2 */
+#define BH1770_PS_TH_LED3       0x95 /* PS interrupt threshold for LED3 */
+#define BH1770_ALS_TH_UP_0      0x96 /* ALS upper threshold low byte */
+#define BH1770_ALS_TH_UP_1      0x97 /* ALS upper threshold high byte */
+#define BH1770_ALS_TH_LOW_0     0x98 /* ALS lower threshold low byte */
+#define BH1770_ALS_TH_LOW_1     0x99 /* ALS lower threshold high byte */
+
+/* MANUFACT_ID */
+#define BH1770_MANUFACT_ROHM    0x01
+#define BH1770_MANUFACT_OSRAM   0x03
+
+/* PART_ID */
+#define BH1770_PART             0x90
+#define BH1770_PART_MASK        0xf0
+#define BH1770_REV_MASK         0x0f
+#define BH1770_REV_SHIFT        0
+#define BH1770_REV_0            0x00
+#define BH1770_REV_1            0x01
+
+/* Operating modes for both */
+#define BH1770_STANDBY          0x00
+#define BH1770_FORCED           0x02
+#define BH1770_STANDALONE       0x03
+#define BH1770_SWRESET          (0x01 << 2)
+
+#define BH1770_PS_TRIG_MEAS     (1 << 0)
+#define BH1770_ALS_TRIG_MEAS    (1 << 1)
+
+/* Interrupt control */
+#define BH1770_INT_OUTPUT_MODE  (1 << 3) /* 0 = latched */
+#define BH1770_INT_POLARITY     (1 << 2) /* 1 = active high */
+#define BH1770_INT_ALS_ENA      (1 << 1)
+#define BH1770_INT_PS_ENA       (1 << 0)
+
+/* Interrupt status */
+#define BH1770_INT_LED1_DATA    (1 << 0)
+#define BH1770_INT_LED1_INT     (1 << 1)
+#define BH1770_INT_LED2_DATA    (1 << 2)
+#define BH1770_INT_LED2_INT     (1 << 3)
+#define BH1770_INT_LED3_DATA    (1 << 4)
+#define BH1770_INT_LED3_INT     (1 << 5)
+#define BH1770_INT_LEDS_INT     ((1 << 1) | (1 << 3) | (1 << 5))
+#define BH1770_INT_ALS_DATA     (1 << 6)
+#define BH1770_INT_ALS_INT      (1 << 7)
+
+/* Led channels */
+#define BH1770_LED1             0x00
+
+#define BH1770_DISABLE          0
+#define BH1770_ENABLE           1
+#define BH1770_PROX_CHANNELS    1
+
+#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */
+#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */
+#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */
+#define BH1770_STARTUP_DELAY    50
+#define BH1770_RESET_TIME       10
+#define BH1770_TIMEOUT          2100 /* Timeout in 2.1 seconds */
+
+#define BH1770_LUX_RANGE        65535
+#define BH1770_PROX_RANGE       255
+#define BH1770_COEF_SCALER      1024
+#define BH1770_CALIB_SCALER     8192
+#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER)
+#define BH1770_LUX_DEF_THRES    1000
+#define BH1770_PROX_DEF_THRES   70
+#define BH1770_PROX_DEF_ABS_THRES   100
+#define BH1770_DEFAULT_PERSISTENCE  10
+#define BH1770_PROX_MAX_PERSISTENCE 50
+#define BH1770_LUX_GA_SCALE     16384
+#define BH1770_LUX_CF_SCALE     2048 /* CF ChipFactor */
+#define BH1770_NEUTRAL_CF       BH1770_LUX_CF_SCALE
+#define BH1770_LUX_CORR_SCALE   4096
+
+#define PROX_ABOVE_THRESHOLD    1
+#define PROX_BELOW_THRESHOLD    0
+
+#define PROX_IGNORE_LUX_LIMIT   500
+
+struct bh1770_chip {
+        struct bh1770_platform_data     *pdata;
+        char                            chipname[10];
+        u8                              revision;
+        struct i2c_client               *client;
+        struct regulator_bulk_data      regs[2];
+        struct mutex                    mutex; /* avoid parallel access */
+        wait_queue_head_t               wait;
+
+        bool                    int_mode_prox;
+        bool                    int_mode_lux;
+        struct delayed_work     prox_work;
+        u32     lux_cf; /* Chip specific factor */
+        u32     lux_ga;
+        u32     lux_calib;
+        int     lux_rate_index;
+        u32     lux_corr;
+        u16     lux_data_raw;
+        u16     lux_threshold_hi;
+        u16     lux_threshold_lo;
+        u16     lux_thres_hi_onchip;
+        u16     lux_thres_lo_onchip;
+        bool    lux_wait_result;
+
+        int     prox_enable_count;
+        u16     prox_coef;
+        u16     prox_const;
+        int     prox_rate;
+        int     prox_rate_threshold;
+        u8      prox_persistence;
+        u8      prox_persistence_counter;
+        u8      prox_data;
+        u8      prox_threshold;
+        u8      prox_threshold_hw;
+        bool    prox_force_update;
+        u8      prox_abs_thres;
+        u8      prox_led;
+};
+
+static const char reg_vcc[] = "Vcc";
+static const char reg_vleds[] = "Vleds";
+
+/*
+ * Supported stand alone rates in ms from chip data sheet
+ * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000};
+ */
+static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
+static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
+
+/* Supported IR-led currents in mA */
+static const u8 prox_curr_ma[] = {5, 10, 20, 50, 100, 150, 200};
+
+/*
+ * Supported stand alone rates in ms from chip data sheet
+ * {100, 200, 500, 1000, 2000};
+ */
+static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0};
+
+/*
+ * interrupt control functions are called while keeping chip->mutex
+ * excluding module probe / remove
+ */
+static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip,
+                                        int lux)
+{
+        chip->int_mode_lux = lux;
+        /* Set interrupt modes, interrupt active low, latched */
+        return i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_INTERRUPT,
+                                        (lux << 1) | chip->int_mode_prox);
+}
+
+static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip,
+                                        int ps)
+{
+        chip->int_mode_prox = ps;
+        return i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_INTERRUPT,
+                                        (chip->int_mode_lux << 1) | (ps << 0));
+}
+
+/* chip->mutex is always kept here */
+static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index)
+{
+        /* sysfs may call this when the chip is powered off */
+        if (pm_runtime_suspended(&chip->client->dev))
+                return 0;
+
+        /* Proper proximity response needs fastest lux rate (100ms) */
+        if (chip->prox_enable_count)
+                rate_index = 0;
+
+        return i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_ALS_MEAS_RATE,
+                                        rate_index);
+}
+
+static int bh1770_prox_rate(struct bh1770_chip *chip, int mode)
+{
+        int rate;
+
+        rate = (mode == PROX_ABOVE_THRESHOLD) ?
+                chip->prox_rate_threshold : chip->prox_rate;
+
+        return i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_PS_MEAS_RATE,
+                                        rate);
+}
+
+/* InfraredLED is controlled by the chip during proximity scanning */
+static inline int bh1770_led_cfg(struct bh1770_chip *chip)
+{
+        /* LED cfg, current for leds 1 and 2 */
+        return i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_I_LED,
+                                        (BH1770_LED1 << 6) |
+                                        (BH1770_LED_5mA << 3) |
+                                        chip->prox_led);
+}
+
+/*
+ * Following two functions converts raw ps values from HW to normalized
+ * values. Purpose is to compensate differences between different sensor
+ * versions and variants so that result means about the same between
+ * versions.
+ */
+static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw)
+{
+        u16 adjusted;
+        adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) /
+                BH1770_COEF_SCALER);
+        if (adjusted > BH1770_PROX_RANGE)
+                adjusted = BH1770_PROX_RANGE;
+        return adjusted;
+}
+
+static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps)
+{
+        u16 raw;
+
+        raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef);
+        if (raw > chip->prox_const)
+                raw = raw - chip->prox_const;
+        else
+                raw = 0;
+        return raw;
+}
+
+/*
+ * Following two functions converts raw lux values from HW to normalized
+ * values. Purpose is to compensate differences between different sensor
+ * versions and variants so that result means about the same between
+ * versions. Chip->mutex is kept when this is called.
+ */
+static int bh1770_prox_set_threshold(struct bh1770_chip *chip)
+{
+        u8 tmp = 0;
+
+        /* sysfs may call this when the chip is powered off */
+        if (pm_runtime_suspended(&chip->client->dev))
+                return 0;
+
+        tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold);
+        chip->prox_threshold_hw = tmp;
+
+        return  i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1,
+                                        tmp);
+}
+
+static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw)
+{
+        u32 lux;
+        lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE;
+        return min(lux, (u32)BH1770_LUX_RANGE);
+}
+
+static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip,
+                                        u16 adjusted)
+{
+        return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr;
+}
+
+/* chip->mutex is kept when this is called */
+static int bh1770_lux_update_thresholds(struct bh1770_chip *chip,
+                                        u16 threshold_hi, u16 threshold_lo)
+{
+        u8 data[4];
+        int ret;
+
+        /* sysfs may call this when the chip is powered off */
+        if (pm_runtime_suspended(&chip->client->dev))
+                return 0;
+
+        /*
+         * Compensate threshold values with the correction factors if not
+         * set to minimum or maximum.
+         * Min & max values disables interrupts.
+         */
+        if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0)
+                threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi);
+
+        if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0)
+                threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo);
+
+        if (chip->lux_thres_hi_onchip == threshold_hi &&
+            chip->lux_thres_lo_onchip == threshold_lo)
+                return 0;
+
+        chip->lux_thres_hi_onchip = threshold_hi;
+        chip->lux_thres_lo_onchip = threshold_lo;
+
+        data[0] = threshold_hi;
+        data[1] = threshold_hi >> 8;
+        data[2] = threshold_lo;
+        data[3] = threshold_lo >> 8;
+
+        ret = i2c_smbus_write_i2c_block_data(chip->client,
+                                        BH1770_ALS_TH_UP_0,
+                                        ARRAY_SIZE(data),
+                                        data);
+        return ret;
+}
+
+static int bh1770_lux_get_result(struct bh1770_chip *chip)
+{
+        u16 data;
+        int ret;
+
+        ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0);
+        if (ret < 0)
+                return ret;
+
+        data = ret & 0xff;
+        ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1);
+        if (ret < 0)
+                return ret;
+
+        chip->lux_data_raw = data | ((ret & 0xff) << 8);
+
+        return 0;
+}
+
+/* Calculate correction value which contains chip and device specific parts */
+static u32 bh1770_get_corr_value(struct bh1770_chip *chip)
+{
+        u32 tmp;
+        /* Impact of glass attenuation correction */
+        tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE;
+        /* Impact of chip factor correction */
+        tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE;
+        /* Impact of Device specific calibration correction */
+        tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER;
+        return tmp;
+}
+
+static int bh1770_lux_read_result(struct bh1770_chip *chip)
+{
+        bh1770_lux_get_result(chip);
+        return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw);
+}
+
+/*
+ * Chip on / off functions are called while keeping mutex except probe
+ * or remove phase
+ */
+static int bh1770_chip_on(struct bh1770_chip *chip)
+{
+        int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
+                                        chip->regs);
+        if (ret < 0)
+                return ret;
+
+        usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
+
+        /* Reset the chip */
+        i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL,
+                                BH1770_SWRESET);
+        usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2);
+
+        /*
+         * ALS is started always since proximity needs als results
+         * for realibility estimation.
+         * Let's assume dark until the first ALS measurement is ready.
+         */
+        chip->lux_data_raw = 0;
+        chip->prox_data = 0;
+        ret = i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_ALS_CONTROL, BH1770_STANDALONE);
+
+        /* Assume reset defaults */
+        chip->lux_thres_hi_onchip = BH1770_LUX_RANGE;
+        chip->lux_thres_lo_onchip = 0;
+
+        return ret;
+}
+
+static void bh1770_chip_off(struct bh1770_chip *chip)
+{
+        i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_INTERRUPT, BH1770_DISABLE);
+        i2c_smbus_write_byte_data(chip->client,
+                                BH1770_ALS_CONTROL, BH1770_STANDBY);
+        i2c_smbus_write_byte_data(chip->client,
+                                BH1770_PS_CONTROL, BH1770_STANDBY);
+        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
+}
+
+/* chip->mutex is kept when this is called */
+static int bh1770_prox_mode_control(struct bh1770_chip *chip)
+{
+        if (chip->prox_enable_count) {
+                chip->prox_force_update = true; /* Force immediate update */
+
+                bh1770_lux_rate(chip, chip->lux_rate_index);
+                bh1770_prox_set_threshold(chip);
+                bh1770_led_cfg(chip);
+                bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD);
+                bh1770_prox_interrupt_control(chip, BH1770_ENABLE);
+                i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_PS_CONTROL, BH1770_STANDALONE);
+        } else {
+                chip->prox_data = 0;
+                bh1770_lux_rate(chip, chip->lux_rate_index);
+                bh1770_prox_interrupt_control(chip, BH1770_DISABLE);
+                i2c_smbus_write_byte_data(chip->client,
+                                        BH1770_PS_CONTROL, BH1770_STANDBY);
+        }
+        return 0;
+}
+
+/* chip->mutex is kept when this is called */
+static int bh1770_prox_read_result(struct bh1770_chip *chip)
+{
+        int ret;
+        bool above;
+        u8 mode;
+
+        ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1);
+        if (ret < 0)
+                goto out;
+
+        if (ret > chip->prox_threshold_hw)
+                above = true;
+        else
+                above = false;
+
+        /*
+         * when ALS levels goes above limit, proximity result may be
+         * false proximity. Thus ignore the result. With real proximity
+         * there is a shadow causing low als levels.
+         */
+        if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT)
+                ret = 0;
+
+        chip->prox_data = bh1770_psraw_to_adjusted(chip, ret);
+
+        /* Strong proximity level or force mode requires immediate response */
+        if (chip->prox_data >= chip->prox_abs_thres ||
+            chip->prox_force_update)
+                chip->prox_persistence_counter = chip->prox_persistence;
+
+        chip->prox_force_update = false;
+
+        /* Persistence filttering to reduce false proximity events */
+        if (likely(above)) {
+                if (chip->prox_persistence_counter < chip->prox_persistence) {
+                        chip->prox_persistence_counter++;
+                        ret = -ENODATA;
+                } else {
+                        mode = PROX_ABOVE_THRESHOLD;
+                        ret = 0;
+                }
+        } else {
+                chip->prox_persistence_counter = 0;
+                mode = PROX_BELOW_THRESHOLD;
+                chip->prox_data = 0;
+                ret = 0;
+        }
+
+        /* Set proximity detection rate based on above or below value */
+        if (ret == 0) {
+                bh1770_prox_rate(chip, mode);
+                sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw");
+        }
+out:
+        return ret;
+}
+
+static int bh1770_detect(struct bh1770_chip *chip)
+{
+        struct i2c_client *client = chip->client;
+        s32 ret;
+        u8 manu, part;
+
+        ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID);
+        if (ret < 0)
+                goto error;
+        manu = (u8)ret;
+
+        ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID);
+        if (ret < 0)
+                goto error;
+        part = (u8)ret;
+
+        chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT;
+        chip->prox_coef = BH1770_COEF_SCALER;
+        chip->prox_const = 0;
+        chip->lux_cf = BH1770_NEUTRAL_CF;
+
+        if ((manu == BH1770_MANUFACT_ROHM) &&
+            ((part & BH1770_PART_MASK) == BH1770_PART)) {
+                snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC");
+                return 0;
+        }
+
+        if ((manu == BH1770_MANUFACT_OSRAM) &&
+            ((part & BH1770_PART_MASK) == BH1770_PART)) {
+                snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770");
+                /* Values selected by comparing different versions */
+                chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */
+                chip->prox_const = 40;
+                return 0;
+        }
+
+        ret = -ENODEV;
+error:
+        dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n");
+
+        return ret;
+}
+
+/*
+ * This work is re-scheduled at every proximity interrupt.
+ * If this work is running, it means that there hasn't been any
+ * proximity interrupt in time. Situation is handled as no-proximity.
+ * It would be nice to have low-threshold interrupt or interrupt
+ * when measurement and hi-threshold are both 0. But neither of those exists.
+ * This is a workaroud for missing HW feature.
+ */
+
+static void bh1770_prox_work(struct work_struct *work)
+{
+        struct bh1770_chip *chip =
+                container_of(work, struct bh1770_chip, prox_work.work);
+
+        mutex_lock(&chip->mutex);
+        bh1770_prox_read_result(chip);
+        mutex_unlock(&chip->mutex);
+}
+
+/* This is threaded irq handler */
+static irqreturn_t bh1770_irq(int irq, void *data)
+{
+        struct bh1770_chip *chip = data;
+        int status;
+        int rate = 0;
+
+        mutex_lock(&chip->mutex);
+        status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS);
+
+        /* Acknowledge interrupt by reading this register */
+        i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT);
+
+        /*
+         * Check if there is fresh data available for als.
+         * If this is the very first data, update thresholds after that.
+         */
+        if (status & BH1770_INT_ALS_DATA) {
+                bh1770_lux_get_result(chip);
+                if (unlikely(chip->lux_wait_result)) {
+                        chip->lux_wait_result = false;
+                        wake_up(&chip->wait);
+                        bh1770_lux_update_thresholds(chip,
+                                                chip->lux_threshold_hi,
+                                                chip->lux_threshold_lo);
+                }
+        }
+
+        /* Disable interrupt logic to guarantee acknowledgement */
+        i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
+                                  (0 << 1) | (0 << 0));
+
+        if ((status & BH1770_INT_ALS_INT))
+                sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input");
+
+        if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) {
+                rate = prox_rates_ms[chip->prox_rate_threshold];
+                bh1770_prox_read_result(chip);
+        }
+
+        /* Re-enable interrupt logic */
+        i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
+                                  (chip->int_mode_lux << 1) |
+                                  (chip->int_mode_prox << 0));
+        mutex_unlock(&chip->mutex);
+
+        /*
+         * Can't cancel work while keeping mutex since the work uses the
+         * same mutex.
+         */
+        if (rate) {
+                /*
+                 * Simulate missing no-proximity interrupt 50ms after the
+                 * next expected interrupt time.
+                 */
+                cancel_delayed_work_sync(&chip->prox_work);
+                schedule_delayed_work(&chip->prox_work,
+                                msecs_to_jiffies(rate + 50));
+        }
+        return IRQ_HANDLED;
+}
+
+static ssize_t bh1770_power_state_store(struct device *dev,
+                                      struct device_attribute *attr,
+                                      const char *buf, size_t count)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+        size_t ret;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        if (value) {
+                pm_runtime_get_sync(dev);
+
+                ret = bh1770_lux_rate(chip, chip->lux_rate_index);
+                ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
+
+                if (ret < 0) {
+                        pm_runtime_put(dev);
+                        goto leave;
+                }
+
+                /* This causes interrupt after the next measurement cycle */
+                bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
+                                        BH1770_LUX_DEF_THRES);
+                /* Inform that we are waiting for a result from ALS */
+                chip->lux_wait_result = true;
+                bh1770_prox_mode_control(chip);
+        } else if (!pm_runtime_suspended(dev)) {
+                pm_runtime_put(dev);
+        }
+        ret = count;
+leave:
+        mutex_unlock(&chip->mutex);
+        return ret;
+}
+
+static ssize_t bh1770_power_state_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
+}
+
+static ssize_t bh1770_lux_result_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        ssize_t ret;
+        long timeout;
+
+        if (pm_runtime_suspended(dev))
+                return -EIO; /* Chip is not enabled at all */
+
+        timeout = wait_event_interruptible_timeout(chip->wait,
+                                        !chip->lux_wait_result,
+                                        msecs_to_jiffies(BH1770_TIMEOUT));
+        if (!timeout)
+                return -EIO;
+
+        mutex_lock(&chip->mutex);
+        ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip));
+        mutex_unlock(&chip->mutex);
+
+        return ret;
+}
+
+static ssize_t bh1770_lux_range_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%d\n", BH1770_LUX_RANGE);
+}
+
+static ssize_t bh1770_prox_enable_store(struct device *dev,
+                                      struct device_attribute *attr,
+                                      const char *buf, size_t count)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        /* Assume no proximity. Sensor will tell real state soon */
+        if (!chip->prox_enable_count)
+                chip->prox_data = 0;
+
+        if (value)
+                chip->prox_enable_count++;
+        else if (chip->prox_enable_count > 0)
+                chip->prox_enable_count--;
+        else
+                goto leave;
+
+        /* Run control only when chip is powered on */
+        if (!pm_runtime_suspended(dev))
+                bh1770_prox_mode_control(chip);
+leave:
+        mutex_unlock(&chip->mutex);
+        return count;
+}
+
+static ssize_t bh1770_prox_enable_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        ssize_t len;
+
+        mutex_lock(&chip->mutex);
+        len = sprintf(buf, "%d\n", chip->prox_enable_count);
+        mutex_unlock(&chip->mutex);
+        return len;
+}
+
+static ssize_t bh1770_prox_result_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        ssize_t ret;
+
+        mutex_lock(&chip->mutex);
+        if (chip->prox_enable_count && !pm_runtime_suspended(dev))
+                ret = sprintf(buf, "%d\n", chip->prox_data);
+        else
+                ret = -EIO;
+        mutex_unlock(&chip->mutex);
+        return ret;
+}
+
+static ssize_t bh1770_prox_range_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%d\n", BH1770_PROX_RANGE);
+}
+
+static ssize_t bh1770_get_prox_rate_avail(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        int i;
+        int pos = 0;
+        for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++)
+                pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]);
+        sprintf(buf + pos - 1, "\n");
+        return pos;
+}
+
+static ssize_t bh1770_get_prox_rate_above(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]);
+}
+
+static ssize_t bh1770_get_prox_rate_below(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]);
+}
+
+static int bh1770_prox_rate_validate(int rate)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++)
+                if (rate >= prox_rates_hz[i])
+                        break;
+        return i;
+}
+
+static ssize_t bh1770_set_prox_rate_above(struct device *dev,
+                                        struct device_attribute *attr,
+                                        const char *buf, size_t count)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        chip->prox_rate_threshold = bh1770_prox_rate_validate(value);
+        mutex_unlock(&chip->mutex);
+        return count;
+}
+
+static ssize_t bh1770_set_prox_rate_below(struct device *dev,
+                                        struct device_attribute *attr,
+                                        const char *buf, size_t count)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        chip->prox_rate = bh1770_prox_rate_validate(value);
+        mutex_unlock(&chip->mutex);
+        return count;
+}
+
+static ssize_t bh1770_get_prox_thres(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->prox_threshold);
+}
+
+static ssize_t bh1770_set_prox_thres(struct device *dev,
+                                      struct device_attribute *attr,
+                                      const char *buf, size_t count)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        unsigned long value;
+        int ret;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+        if (value > BH1770_PROX_RANGE)
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        chip->prox_threshold = value;
+        ret = bh1770_prox_set_threshold(chip);
+        mutex_unlock(&chip->mutex);
+        if (ret < 0)
+                return ret;
+        return count;
+}
+
+static ssize_t bh1770_prox_persistence_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip = dev_get_drvdata(dev);
+
+        return sprintf(buf, "%u\n", chip->prox_persistence);
+}
+
+static ssize_t bh1770_prox_persistence_store(struct device *dev,
+                                struct device_attribute *attr,
+                                const char *buf, size_t len)
+{
+        struct bh1770_chip *chip = dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        if (value > BH1770_PROX_MAX_PERSISTENCE)
+                return -EINVAL;
+
+        chip->prox_persistence = value;
+
+        return len;
+}
+
+static ssize_t bh1770_prox_abs_thres_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip = dev_get_drvdata(dev);
+        return sprintf(buf, "%u\n", chip->prox_abs_thres);
+}
+
+static ssize_t bh1770_prox_abs_thres_store(struct device *dev,
+                                struct device_attribute *attr,
+                                const char *buf, size_t len)
+{
+        struct bh1770_chip *chip = dev_get_drvdata(dev);
+        unsigned long value;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        if (value > BH1770_PROX_RANGE)
+                return -EINVAL;
+
+        chip->prox_abs_thres = value;
+
+        return len;
+}
+
+static ssize_t bh1770_chip_id_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision);
+}
+
+static ssize_t bh1770_lux_calib_default_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%u\n", BH1770_CALIB_SCALER);
+}
+
+static ssize_t bh1770_lux_calib_show(struct device *dev,
+                                 struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip = dev_get_drvdata(dev);
+        ssize_t len;
+
+        mutex_lock(&chip->mutex);
+        len = sprintf(buf, "%u\n", chip->lux_calib);
+        mutex_unlock(&chip->mutex);
+        return len;
+}
+
+static ssize_t bh1770_lux_calib_store(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct bh1770_chip *chip = dev_get_drvdata(dev);
+        unsigned long value;
+        u32 old_calib;
+        u32 new_corr;
+
+        if (strict_strtoul(buf, 0, &value))
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        old_calib = chip->lux_calib;
+        chip->lux_calib = value;
+        new_corr = bh1770_get_corr_value(chip);
+        if (new_corr == 0) {
+                chip->lux_calib = old_calib;
+                mutex_unlock(&chip->mutex);
+                return -EINVAL;
+        }
+        chip->lux_corr = new_corr;
+        /* Refresh thresholds on HW after changing correction value */
+        bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi,
+                                chip->lux_threshold_lo);
+
+        mutex_unlock(&chip->mutex);
+
+        return len;
+}
+
+static ssize_t bh1770_get_lux_rate_avail(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        int i;
+        int pos = 0;
+        for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++)
+                pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]);
+        sprintf(buf + pos - 1, "\n");
+        return pos;
+}
+
+static ssize_t bh1770_get_lux_rate(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]);
+}
+
+static ssize_t bh1770_set_lux_rate(struct device *dev,
+                                      struct device_attribute *attr,
+                                      const char *buf, size_t count)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        unsigned long rate_hz;
+        int ret, i;
+
+        if (strict_strtoul(buf, 0, &rate_hz))
+                return -EINVAL;
+
+        for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++)
+                if (rate_hz >= lux_rates_hz[i])
+                        break;
+
+        mutex_lock(&chip->mutex);
+        chip->lux_rate_index = i;
+        ret = bh1770_lux_rate(chip, i);
+        mutex_unlock(&chip->mutex);
+
+        if (ret < 0)
+                return ret;
+
+        return count;
+}
+
+static ssize_t bh1770_get_lux_thresh_above(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->lux_threshold_hi);
+}
+
+static ssize_t bh1770_get_lux_thresh_below(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        return sprintf(buf, "%d\n", chip->lux_threshold_lo);
+}
+
+static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target,
+                                const char *buf)
+{
+        int ret = 0;
+        unsigned long thresh;
+
+        if (strict_strtoul(buf, 0, &thresh))
+                return -EINVAL;
+
+        if (thresh > BH1770_LUX_RANGE)
+                return -EINVAL;
+
+        mutex_lock(&chip->mutex);
+        *target = thresh;
+        /*
+         * Don't update values in HW if we are still waiting for
+         * first interrupt to come after device handle open call.
+         */
+        if (!chip->lux_wait_result)
+                ret = bh1770_lux_update_thresholds(chip,
+                                                chip->lux_threshold_hi,
+                                                chip->lux_threshold_lo);
+        mutex_unlock(&chip->mutex);
+        return ret;
+
+}
+
+static ssize_t bh1770_set_lux_thresh_above(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf);
+        if (ret < 0)
+                return ret;
+        return len;
+}
+
+static ssize_t bh1770_set_lux_thresh_below(struct device *dev,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t len)
+{
+        struct bh1770_chip *chip =  dev_get_drvdata(dev);
+        int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf);
+        if (ret < 0)
+                return ret;
+        return len;
+}
+
+static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show,
+                                                bh1770_prox_enable_store);
+static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR,
+                                                bh1770_prox_abs_thres_show,
+                                                bh1770_prox_abs_thres_store);
+static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR,
+                                                bh1770_get_prox_thres,
+                                                bh1770_set_prox_thres);
+static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL);
+static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL);
+static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR,
+                                                bh1770_prox_persistence_show,
+                                                bh1770_prox_persistence_store);
+static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR,
+                                                bh1770_get_prox_rate_above,
+                                                bh1770_set_prox_rate_above);
+static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR,
+                                                bh1770_get_prox_rate_below,
+                                                bh1770_set_prox_rate_below);
+static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL);
+
+static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show,
+                                                bh1770_lux_calib_store);
+static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
+                                                bh1770_lux_calib_default_show,
+                                                NULL);
+static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL);
+static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL);
+static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate,
+                                                bh1770_set_lux_rate);
+static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL);
+static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
+                                                bh1770_get_lux_thresh_above,
+                                                bh1770_set_lux_thresh_above);
+static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
+                                                bh1770_get_lux_thresh_below,
+                                                bh1770_set_lux_thresh_below);
+static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL);
+static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show,
+                                                 bh1770_power_state_store);
+
+
+static struct attribute *sysfs_attrs[] = {
+        &dev_attr_lux0_calibscale.attr,
+        &dev_attr_lux0_calibscale_default.attr,
+        &dev_attr_lux0_input.attr,
+        &dev_attr_lux0_sensor_range.attr,
+        &dev_attr_lux0_rate.attr,
+        &dev_attr_lux0_rate_avail.attr,
+        &dev_attr_lux0_thresh_above_value.attr,
+        &dev_attr_lux0_thresh_below_value.attr,
+        &dev_attr_prox0_raw.attr,
+        &dev_attr_prox0_sensor_range.attr,
+        &dev_attr_prox0_raw_en.attr,
+        &dev_attr_prox0_thresh_above_count.attr,
+        &dev_attr_prox0_rate_above.attr,
+        &dev_attr_prox0_rate_below.attr,
+        &dev_attr_prox0_rate_avail.attr,
+        &dev_attr_prox0_thresh_above0_value.attr,
+        &dev_attr_prox0_thresh_above1_value.attr,
+        &dev_attr_chip_id.attr,
+        &dev_attr_power_state.attr,
+        NULL
+};
+
+static struct attribute_group bh1770_attribute_group = {
+        .attrs = sysfs_attrs
+};
+
+static int __devinit bh1770_probe(struct i2c_client *client,
+                                const struct i2c_device_id *id)
+{
+        struct bh1770_chip *chip;
+        int err;
+
+        chip = kzalloc(sizeof *chip, GFP_KERNEL);
+        if (!chip)
+                return -ENOMEM;
+
+        i2c_set_clientdata(client, chip);
+        chip->client  = client;
+
+        mutex_init(&chip->mutex);
+        init_waitqueue_head(&chip->wait);
+        INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work);
+
+        if (client->dev.platform_data == NULL) {
+                dev_err(&client->dev, "platform data is mandatory\n");
+                err = -EINVAL;
+                goto fail1;
+        }
+
+        chip->pdata             = client->dev.platform_data;
+        chip->lux_calib         = BH1770_LUX_NEUTRAL_CALIB_VALUE;
+        chip->lux_rate_index    = BH1770_LUX_DEFAULT_RATE;
+        chip->lux_threshold_lo  = BH1770_LUX_DEF_THRES;
+        chip->lux_threshold_hi  = BH1770_LUX_DEF_THRES;
+
+        if (chip->pdata->glass_attenuation == 0)
+                chip->lux_ga = BH1770_NEUTRAL_GA;
+        else
+                chip->lux_ga = chip->pdata->glass_attenuation;
+
+        chip->prox_threshold    = BH1770_PROX_DEF_THRES;
+        chip->prox_led          = chip->pdata->led_def_curr;
+        chip->prox_abs_thres    = BH1770_PROX_DEF_ABS_THRES;
+        chip->prox_persistence  = BH1770_DEFAULT_PERSISTENCE;
+        chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH;
+        chip->prox_rate         = BH1770_PROX_DEFAULT_RATE;
+        chip->prox_data         = 0;
+
+        chip->regs[0].supply = reg_vcc;
+        chip->regs[1].supply = reg_vleds;
+
+        err = regulator_bulk_get(&client->dev,
+                                 ARRAY_SIZE(chip->regs), chip->regs);
+        if (err < 0) {
+                dev_err(&client->dev, "Cannot get regulators\n");
+                goto fail1;
+        }
+
+        err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
+                                chip->regs);
+        if (err < 0) {
+                dev_err(&client->dev, "Cannot enable regulators\n");
+                goto fail2;
+        }
+
+        usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
+        err = bh1770_detect(chip);
+        if (err < 0)
+                goto fail3;
+
+        /* Start chip */
+        bh1770_chip_on(chip);
+        pm_runtime_set_active(&client->dev);
+        pm_runtime_enable(&client->dev);
+
+        chip->lux_corr = bh1770_get_corr_value(chip);
+        if (chip->lux_corr == 0) {
+                dev_err(&client->dev, "Improper correction values\n");
+                err = -EINVAL;
+                goto fail3;
+        }
+
+        if (chip->pdata->setup_resources) {
+                err = chip->pdata->setup_resources();
+                if (err) {
+                        err = -EINVAL;
+                        goto fail3;
+                }
+        }
+
+        err = sysfs_create_group(&chip->client->dev.kobj,
+                                &bh1770_attribute_group);
+        if (err < 0) {
+                dev_err(&chip->client->dev, "Sysfs registration failed\n");
+                goto fail4;
+        }
+
+        /*
+         * Chip needs level triggered interrupt to work. However,
+         * level triggering doesn't work always correctly with power
+         * management. Select both
+         */
+        err = request_threaded_irq(client->irq, NULL,
+                                bh1770_irq,
+                                IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+                                IRQF_TRIGGER_LOW,
+                                "bh1770", chip);
+        if (err) {
+                dev_err(&client->dev, "could not get IRQ %d\n",
+                        client->irq);
+                goto fail5;
+        }
+        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
+        return err;
+fail5:
+        sysfs_remove_group(&chip->client->dev.kobj,
+                        &bh1770_attribute_group);
+fail4:
+        if (chip->pdata->release_resources)
+                chip->pdata->release_resources();
+fail3:
+        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
+fail2:
+        regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
+fail1:
+        kfree(chip);
+        return err;
+}
+
+static int __devexit bh1770_remove(struct i2c_client *client)
+{
+        struct bh1770_chip *chip = i2c_get_clientdata(client);
+
+        free_irq(client->irq, chip);
+
+        sysfs_remove_group(&chip->client->dev.kobj,
+                        &bh1770_attribute_group);
+
+        if (chip->pdata->release_resources)
+                chip->pdata->release_resources();
+
+        cancel_delayed_work_sync(&chip->prox_work);
+
+        if (!pm_runtime_suspended(&client->dev))
+                bh1770_chip_off(chip);
+
+        pm_runtime_disable(&client->dev);
+        pm_runtime_set_suspended(&client->dev);
+
+        regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
+        kfree(chip);
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int bh1770_suspend(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct bh1770_chip *chip = i2c_get_clientdata(client);
+
+        bh1770_chip_off(chip);
+
+        return 0;
+}
+
+static int bh1770_resume(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct bh1770_chip *chip = i2c_get_clientdata(client);
+        int ret = 0;
+
+        bh1770_chip_on(chip);
+
+        if (!pm_runtime_suspended(dev)) {
+                /*
+                 * If we were enabled at suspend time, it is expected
+                 * everything works nice and smoothly
+                 */
+                ret = bh1770_lux_rate(chip, chip->lux_rate_index);
+                ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
+
+                /* This causes interrupt after the next measurement cycle */
+                bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
+                                        BH1770_LUX_DEF_THRES);
+                /* Inform that we are waiting for a result from ALS */
+                chip->lux_wait_result = true;
+                bh1770_prox_mode_control(chip);
+        }
+        return ret;
+}
+
+#else
+#define bh1770_suspend  NULL
+#define bh1770_shutdown NULL
+#define bh1770_resume   NULL
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int bh1770_runtime_suspend(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct bh1770_chip *chip = i2c_get_clientdata(client);
+
+        bh1770_chip_off(chip);
+
+        return 0;
+}
+
+static int bh1770_runtime_resume(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct bh1770_chip *chip = i2c_get_clientdata(client);
+
+        bh1770_chip_on(chip);
+
+        return 0;
+}
+#endif
+
+static const struct i2c_device_id bh1770_id[] = {
+        {"bh1770glc", 0 },
+        {"sfh7770", 0 },
+        {}
+};
+
+MODULE_DEVICE_TABLE(i2c, bh1770_id);
+
+static const struct dev_pm_ops bh1770_pm_ops = {
+        SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume)
+        SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL)
+};
+
+static struct i2c_driver bh1770_driver = {
+        .driver  = {
+                .name   = "bh1770glc",
+                .owner  = THIS_MODULE,
+                .pm     = &bh1770_pm_ops,
+        },
+        .probe    = bh1770_probe,
+        .remove   = __devexit_p(bh1770_remove),
+        .id_table = bh1770_id,
+};
+
+static int __init bh1770_init(void)
+{
+        return i2c_add_driver(&bh1770_driver);
+}
+
+static void __exit bh1770_exit(void)
+{
+        i2c_del_driver(&bh1770_driver);
+}
+
+MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor");
+MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
+MODULE_LICENSE("GPL v2");
+
+module_init(bh1770_init);
+module_exit(bh1770_exit);
diff --git a/drivers/misc/isl29020.c b/drivers/misc/isl29020.c
new file mode 100644
index 000000000000..34fe835921c4
--- /dev/null
+++ b/drivers/misc/isl29020.c
@@ -0,0 +1,248 @@
+/*
+ * isl29020.c - Intersil  ALS Driver
+ *
+ * Copyright (C) 2008 Intel Corp
+ *
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * Data sheet at: http://www.intersil.com/data/fn/fn6505.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/sysfs.h>
+#include <linux/pm_runtime.h>
+
+static DEFINE_MUTEX(mutex);
+
+static ssize_t als_sensing_range_show(struct device *dev,
+                        struct device_attribute *attr,  char *buf)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        int  val;
+
+        val = i2c_smbus_read_byte_data(client, 0x00);
+
+        if (val < 0)
+                return val;
+        return sprintf(buf, "%d000\n", 1 << (2 * (val & 3)));
+
+}
+
+static ssize_t als_lux_input_data_show(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        int ret_val, val;
+        unsigned long int lux;
+        int temp;
+
+        pm_runtime_get_sync(dev);
+        msleep(100);
+
+        mutex_lock(&mutex);
+        temp = i2c_smbus_read_byte_data(client, 0x02); /* MSB data */
+        if (temp < 0) {
+                pm_runtime_put_sync(dev);
+                mutex_unlock(&mutex);
+                return temp;
+        }
+
+        ret_val = i2c_smbus_read_byte_data(client, 0x01); /* LSB data */
+        mutex_unlock(&mutex);
+
+        if (ret_val < 0) {
+                pm_runtime_put_sync(dev);
+                return ret_val;
+        }
+
+        ret_val |= temp << 8;
+        val = i2c_smbus_read_byte_data(client, 0x00);
+        pm_runtime_put_sync(dev);
+        if (val < 0)
+                return val;
+        lux = ((((1 << (2 * (val & 3))))*1000) * ret_val) / 65536;
+        return sprintf(buf, "%ld\n", lux);
+}
+
+static ssize_t als_sensing_range_store(struct device *dev,
+                struct device_attribute *attr, const  char *buf, size_t count)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        unsigned int ret_val;
+        unsigned long val;
+
+        if (strict_strtoul(buf, 10, &val))
+                return -EINVAL;
+        if (val < 1 || val > 64000)
+                return -EINVAL;
+
+        /* Pick the smallest sensor range that will meet our requirements */
+        if (val <= 1000)
+                val = 1;
+        else if (val <= 4000)
+                val = 2;
+        else if (val <= 16000)
+                val = 3;
+        else
+                val = 4;
+
+        ret_val = i2c_smbus_read_byte_data(client, 0x00);
+
+        ret_val &= 0xFC; /*reset the bit before setting them */
+        ret_val |= val - 1;
+        ret_val = i2c_smbus_write_byte_data(client, 0x00, ret_val);
+
+        if (ret_val < 0)
+                return ret_val;
+        return count;
+}
+
+static void als_set_power_state(struct i2c_client *client, int enable)
+{
+        int ret_val;
+
+        ret_val = i2c_smbus_read_byte_data(client, 0x00);
+        if (ret_val < 0)
+                return;
+
+        if (enable)
+                ret_val |= 0x80;
+        else
+                ret_val &= 0x7F;
+
+        i2c_smbus_write_byte_data(client, 0x00, ret_val);
+}
+
+static DEVICE_ATTR(lux0_sensor_range, S_IRUGO | S_IWUSR,
+        als_sensing_range_show, als_sensing_range_store);
+static DEVICE_ATTR(lux0_input, S_IRUGO, als_lux_input_data_show, NULL);
+
+static struct attribute *mid_att_als[] = {
+        &dev_attr_lux0_sensor_range.attr,
+        &dev_attr_lux0_input.attr,
+        NULL
+};
+
+static struct attribute_group m_als_gr = {
+        .name = "isl29020",
+        .attrs = mid_att_als
+};
+
+static int als_set_default_config(struct i2c_client *client)
+{
+        int retval;
+
+        retval = i2c_smbus_write_byte_data(client, 0x00, 0xc0);
+        if (retval < 0) {
+                dev_err(&client->dev, "default write failed.");
+                return retval;
+        }
+        return 0;;
+}
+
+static int  isl29020_probe(struct i2c_client *client,
+                                        const struct i2c_device_id *id)
+{
+        int res;
+
+        res = als_set_default_config(client);
+        if (res <  0)
+                return res;
+
+        res = sysfs_create_group(&client->dev.kobj, &m_als_gr);
+        if (res) {
+                dev_err(&client->dev, "isl29020: device create file failed\n");
+                return res;
+        }
+        dev_info(&client->dev, "%s isl29020: ALS chip found\n", client->name);
+        als_set_power_state(client, 0);
+        pm_runtime_enable(&client->dev);
+        return res;
+}
+
+static int isl29020_remove(struct i2c_client *client)
+{
+        struct als_data *data = i2c_get_clientdata(client);
+        sysfs_remove_group(&client->dev.kobj, &m_als_gr);
+        kfree(data);
+        return 0;
+}
+
+static struct i2c_device_id isl29020_id[] = {
+        { "isl29020", 0 },
+        { }
+};
+
+MODULE_DEVICE_TABLE(i2c, isl29020_id);
+
+#ifdef CONFIG_PM
+
+static int isl29020_runtime_suspend(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        als_set_power_state(client, 0);
+        return 0;
+}
+
+static int isl29020_runtime_resume(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        als_set_power_state(client, 1);
+        return 0;
+}
+
+static const struct dev_pm_ops isl29020_pm_ops = {
+        .runtime_suspend = isl29020_runtime_suspend,
+        .runtime_resume = isl29020_runtime_resume,
+};
+
+#define ISL29020_PM_OPS (&isl29020_pm_ops)
+#else   /* CONFIG_PM */
+#define ISL29020_PM_OPS NULL
+#endif  /* CONFIG_PM */
+
+static struct i2c_driver isl29020_driver = {
+        .driver = {
+                .name = "isl29020",
+                .pm = ISL29020_PM_OPS,
+        },
+        .probe = isl29020_probe,
+        .remove = isl29020_remove,
+        .id_table = isl29020_id,
+};
+
+static int __init sensor_isl29020_init(void)
+{
+        return i2c_add_driver(&isl29020_driver);
+}
+
+static void  __exit sensor_isl29020_exit(void)
+{
+        i2c_del_driver(&isl29020_driver);
+}
+
+module_init(sensor_isl29020_init);
+module_exit(sensor_isl29020_exit);
+
+MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
+MODULE_DESCRIPTION("Intersil isl29020 ALS Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index 343b5d8ea697..81d7fa4ec0db 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -52,32 +52,32 @@
 #define REC_NUM_DEFAULT 10
 
 enum cname {
-        INVALID,
-        INT_HARDWARE_ENTRY,
-        INT_HW_IRQ_EN,
-        INT_TASKLET_ENTRY,
-        FS_DEVRW,
-        MEM_SWAPOUT,
-        TIMERADD,
-        SCSI_DISPATCH_CMD,
-        IDE_CORE_CP,
-        DIRECT,
+        CN_INVALID,
+        CN_INT_HARDWARE_ENTRY,
+        CN_INT_HW_IRQ_EN,
+        CN_INT_TASKLET_ENTRY,
+        CN_FS_DEVRW,
+        CN_MEM_SWAPOUT,
+        CN_TIMERADD,
+        CN_SCSI_DISPATCH_CMD,
+        CN_IDE_CORE_CP,
+        CN_DIRECT,
 };
 
 enum ctype {
-        NONE,
-        PANIC,
-        BUG,
-        EXCEPTION,
-        LOOP,
-        OVERFLOW,
-        CORRUPT_STACK,
-        UNALIGNED_LOAD_STORE_WRITE,
-        OVERWRITE_ALLOCATION,
-        WRITE_AFTER_FREE,
-        SOFTLOCKUP,
-        HARDLOCKUP,
-        HUNG_TASK,
+        CT_NONE,
+        CT_PANIC,
+        CT_BUG,
+        CT_EXCEPTION,
+        CT_LOOP,
+        CT_OVERFLOW,
+        CT_CORRUPT_STACK,
+        CT_UNALIGNED_LOAD_STORE_WRITE,
+        CT_OVERWRITE_ALLOCATION,
+        CT_WRITE_AFTER_FREE,
+        CT_SOFTLOCKUP,
+        CT_HARDLOCKUP,
+        CT_HUNG_TASK,
 };
 
 static char* cp_name[] = {
@@ -117,8 +117,8 @@ static char* cpoint_type;
 static int cpoint_count = DEFAULT_COUNT;
 static int recur_count = REC_NUM_DEFAULT;
 
-static enum cname cpoint = INVALID;
-static enum ctype cptype = NONE;
+static enum cname cpoint = CN_INVALID;
+static enum ctype cptype = CT_NONE;
 static int count = DEFAULT_COUNT;
 
 module_param(recur_count, int, 0644);
@@ -207,12 +207,12 @@ static enum ctype parse_cp_type(const char *what, size_t count)
                         return i + 1;
         }
 
-        return NONE;
+        return CT_NONE;
 }
 
 static const char *cp_type_to_str(enum ctype type)
 {
-        if (type == NONE || type < 0 || type > ARRAY_SIZE(cp_type))
+        if (type == CT_NONE || type < 0 || type > ARRAY_SIZE(cp_type))
                 return "None";
 
         return cp_type[type - 1];
@@ -220,7 +220,7 @@ static const char *cp_type_to_str(enum ctype type)
 
 static const char *cp_name_to_str(enum cname name)
 {
-        if (name == INVALID || name < 0 || name > ARRAY_SIZE(cp_name))
+        if (name == CN_INVALID || name < 0 || name > ARRAY_SIZE(cp_name))
                 return "INVALID";
 
         return cp_name[name - 1];
@@ -245,7 +245,7 @@ static int lkdtm_parse_commandline(void)
                 return -EINVAL;
 
         cptype = parse_cp_type(cpoint_type, strlen(cpoint_type));
-        if (cptype == NONE)
+        if (cptype == CT_NONE)
                 return -EINVAL;
 
         for (i = 0; i < ARRAY_SIZE(cp_name); i++) {
@@ -274,30 +274,30 @@ static int recursive_loop(int a)
 static void lkdtm_do_action(enum ctype which)
 {
         switch (which) {
-        case PANIC:
+        case CT_PANIC:
                 panic("dumptest");
                 break;
-        case BUG:
+        case CT_BUG:
                 BUG();
                 break;
-        case EXCEPTION:
+        case CT_EXCEPTION:
                 *((int *) 0) = 0;
                 break;
-        case LOOP:
+        case CT_LOOP:
                 for (;;)
                         ;
                 break;
-        case OVERFLOW:
+        case CT_OVERFLOW:
                 (void) recursive_loop(0);
                 break;
-        case CORRUPT_STACK: {
+        case CT_CORRUPT_STACK: {
                 volatile u32 data[8];
                 volatile u32 *p = data;
 
                 p[12] = 0x12345678;
                 break;
         }
-        case UNALIGNED_LOAD_STORE_WRITE: {
+        case CT_UNALIGNED_LOAD_STORE_WRITE: {
                 static u8 data[5] __attribute__((aligned(4))) = {1, 2,
                                 3, 4, 5};
                 u32 *p;
@@ -309,7 +309,7 @@ static void lkdtm_do_action(enum ctype which)
                 *p = val;
                  break;
         }
-        case OVERWRITE_ALLOCATION: {
+        case CT_OVERWRITE_ALLOCATION: {
                 size_t len = 1020;
                 u32 *data = kmalloc(len, GFP_KERNEL);
 
@@ -317,7 +317,7 @@ static void lkdtm_do_action(enum ctype which)
                 kfree(data);
                 break;
         }
-        case WRITE_AFTER_FREE: {
+        case CT_WRITE_AFTER_FREE: {
                 size_t len = 1024;
                 u32 *data = kmalloc(len, GFP_KERNEL);
 
@@ -326,21 +326,21 @@ static void lkdtm_do_action(enum ctype which)
                 memset(data, 0x78, len);
                 break;
         }
-        case SOFTLOCKUP:
+        case CT_SOFTLOCKUP:
                 preempt_disable();
                 for (;;)
                         cpu_relax();
                 break;
-        case HARDLOCKUP:
+        case CT_HARDLOCKUP:
                 local_irq_disable();
                 for (;;)
                         cpu_relax();
                 break;
-        case HUNG_TASK:
+        case CT_HUNG_TASK:
                 set_current_state(TASK_UNINTERRUPTIBLE);
                 schedule();
                 break;
-        case NONE:
+        case CT_NONE:
         default:
                 break;
         }
@@ -363,43 +363,43 @@ static int lkdtm_register_cpoint(enum cname which)
 {
         int ret;
 
-        cpoint = INVALID;
+        cpoint = CN_INVALID;
         if (lkdtm.entry != NULL)
                 unregister_jprobe(&lkdtm);
 
         switch (which) {
-        case DIRECT:
+        case CN_DIRECT:
                 lkdtm_do_action(cptype);
                 return 0;
-        case INT_HARDWARE_ENTRY:
+        case CN_INT_HARDWARE_ENTRY:
                 lkdtm.kp.symbol_name = "do_IRQ";
                 lkdtm.entry = (kprobe_opcode_t*) jp_do_irq;
                 break;
-        case INT_HW_IRQ_EN:
+        case CN_INT_HW_IRQ_EN:
                 lkdtm.kp.symbol_name = "handle_IRQ_event";
                 lkdtm.entry = (kprobe_opcode_t*) jp_handle_irq_event;
                 break;
-        case INT_TASKLET_ENTRY:
+        case CN_INT_TASKLET_ENTRY:
                 lkdtm.kp.symbol_name = "tasklet_action";
                 lkdtm.entry = (kprobe_opcode_t*) jp_tasklet_action;
                 break;
-        case FS_DEVRW:
+        case CN_FS_DEVRW:
                 lkdtm.kp.symbol_name = "ll_rw_block";
                 lkdtm.entry = (kprobe_opcode_t*) jp_ll_rw_block;
                 break;
-        case MEM_SWAPOUT:
+        case CN_MEM_SWAPOUT:
                 lkdtm.kp.symbol_name = "shrink_inactive_list";
                 lkdtm.entry = (kprobe_opcode_t*) jp_shrink_inactive_list;
                 break;
-        case TIMERADD:
+        case CN_TIMERADD:
                 lkdtm.kp.symbol_name = "hrtimer_start";
                 lkdtm.entry = (kprobe_opcode_t*) jp_hrtimer_start;
                 break;
-        case SCSI_DISPATCH_CMD:
+        case CN_SCSI_DISPATCH_CMD:
                 lkdtm.kp.symbol_name = "scsi_dispatch_cmd";
                 lkdtm.entry = (kprobe_opcode_t*) jp_scsi_dispatch_cmd;
                 break;
-        case IDE_CORE_CP:
+        case CN_IDE_CORE_CP:
 #ifdef CONFIG_IDE
                 lkdtm.kp.symbol_name = "generic_ide_ioctl";
                 lkdtm.entry = (kprobe_opcode_t*) jp_generic_ide_ioctl;
@@ -416,7 +416,7 @@ static int lkdtm_register_cpoint(enum cname which)
         cpoint = which;
         if ((ret = register_jprobe(&lkdtm)) < 0) {
                 printk(KERN_INFO "lkdtm: Couldn't register jprobe\n");
-                cpoint = INVALID;
+                cpoint = CN_INVALID;
         }
 
         return ret;
@@ -445,7 +445,7 @@ static ssize_t do_register_entry(enum cname which, struct file *f,
         cptype = parse_cp_type(buf, count);
         free_page((unsigned long) buf);
 
-        if (cptype == NONE)
+        if (cptype == CT_NONE)
                 return -EINVAL;
 
         err = lkdtm_register_cpoint(which);
@@ -487,49 +487,49 @@ static int lkdtm_debugfs_open(struct inode *inode, struct file *file)
 static ssize_t int_hardware_entry(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(INT_HARDWARE_ENTRY, f, buf, count, off);
+        return do_register_entry(CN_INT_HARDWARE_ENTRY, f, buf, count, off);
 }
 
 static ssize_t int_hw_irq_en(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(INT_HW_IRQ_EN, f, buf, count, off);
+        return do_register_entry(CN_INT_HW_IRQ_EN, f, buf, count, off);
 }
 
 static ssize_t int_tasklet_entry(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(INT_TASKLET_ENTRY, f, buf, count, off);
+        return do_register_entry(CN_INT_TASKLET_ENTRY, f, buf, count, off);
 }
 
 static ssize_t fs_devrw_entry(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(FS_DEVRW, f, buf, count, off);
+        return do_register_entry(CN_FS_DEVRW, f, buf, count, off);
 }
 
 static ssize_t mem_swapout_entry(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(MEM_SWAPOUT, f, buf, count, off);
+        return do_register_entry(CN_MEM_SWAPOUT, f, buf, count, off);
 }
 
 static ssize_t timeradd_entry(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(TIMERADD, f, buf, count, off);
+        return do_register_entry(CN_TIMERADD, f, buf, count, off);
 }
 
 static ssize_t scsi_dispatch_cmd_entry(struct file *f,
                 const char __user *buf, size_t count, loff_t *off)
 {
-        return do_register_entry(SCSI_DISPATCH_CMD, f, buf, count, off);
+        return do_register_entry(CN_SCSI_DISPATCH_CMD, f, buf, count, off);
 }
 
 static ssize_t ide_core_cp_entry(struct file *f, const char __user *buf,
                 size_t count, loff_t *off)
 {
-        return do_register_entry(IDE_CORE_CP, f, buf, count, off);
+        return do_register_entry(CN_IDE_CORE_CP, f, buf, count, off);
 }
 
 /* Special entry to just crash directly. Available without KPROBEs */
@@ -557,7 +557,7 @@ static ssize_t direct_entry(struct file *f, const char __user *user_buf,
 
         type = parse_cp_type(buf, count);
         free_page((unsigned long) buf);
-        if (type == NONE)
+        if (type == CT_NONE)
                 return -EINVAL;
 
         printk(KERN_INFO "lkdtm: Performing direct entry %s\n",
@@ -649,7 +649,7 @@ static int __init lkdtm_module_init(void)
                 goto out_err;
         }
 
-        if (cpoint != INVALID && cptype != NONE) {
+        if (cpoint != CN_INVALID && cptype != CT_NONE) {
                 ret = lkdtm_register_cpoint(cpoint);
                 if (ret < 0) {
                         printk(KERN_INFO "lkdtm: Invalid crash point %d\n",
diff --git a/drivers/misc/phantom.c b/drivers/misc/phantom.c
index 4197a3cb26ba..b05db55c8c8e 100644
--- a/drivers/misc/phantom.c
+++ b/drivers/misc/phantom.c
@@ -343,8 +343,10 @@ static int __devinit phantom_probe(struct pci_dev *pdev,
         int retval;
 
         retval = pci_enable_device(pdev);
-        if (retval)
+        if (retval) {
+                dev_err(&pdev->dev, "pci_enable_device failed!\n");
                 goto err;
+        }
 
         minor = phantom_get_free();
         if (minor == PHANTOM_MAX_MINORS) {
@@ -356,8 +358,10 @@ static int __devinit phantom_probe(struct pci_dev *pdev,
         phantom_devices[minor] = 1;
 
         retval = pci_request_regions(pdev, "phantom");
-        if (retval)
+        if (retval) {
+                dev_err(&pdev->dev, "pci_request_regions failed!\n");
                 goto err_null;
+        }
 
         retval = -ENOMEM;
         pht = kzalloc(sizeof(*pht), GFP_KERNEL);
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
index 1f59ee2226ca..17bbacb1b4b1 100644
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ b/drivers/misc/sgi-xp/xpc_uv.c
@@ -417,6 +417,7 @@ xpc_process_activate_IRQ_rcvd_uv(void)
 static void
 xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
                               struct xpc_activate_mq_msghdr_uv *msg_hdr,
+                              int part_setup,
                               int *wakeup_hb_checker)
 {
         unsigned long irq_flags;
@@ -481,6 +482,9 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
         case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
                 struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
 
+                if (!part_setup)
+                        break;
+
                 msg = container_of(msg_hdr, struct
                                    xpc_activate_mq_msg_chctl_closerequest_uv,
                                    hdr);
@@ -497,6 +501,9 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
         case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
                 struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
 
+                if (!part_setup)
+                        break;
+
                 msg = container_of(msg_hdr, struct
                                    xpc_activate_mq_msg_chctl_closereply_uv,
                                    hdr);
@@ -511,6 +518,9 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
         case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
                 struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
 
+                if (!part_setup)
+                        break;
+
                 msg = container_of(msg_hdr, struct
                                    xpc_activate_mq_msg_chctl_openrequest_uv,
                                    hdr);
@@ -528,6 +538,9 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
         case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
                 struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
 
+                if (!part_setup)
+                        break;
+
                 msg = container_of(msg_hdr, struct
                                    xpc_activate_mq_msg_chctl_openreply_uv, hdr);
                 args = &part->remote_openclose_args[msg->ch_number];
@@ -545,6 +558,9 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
         case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: {
                 struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg;
 
+                if (!part_setup)
+                        break;
+
                 msg = container_of(msg_hdr, struct
                                 xpc_activate_mq_msg_chctl_opencomplete_uv, hdr);
                 spin_lock_irqsave(&part->chctl_lock, irq_flags);
@@ -621,6 +637,7 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
 
                         part_referenced = xpc_part_ref(part);
                         xpc_handle_activate_mq_msg_uv(part, msg_hdr,
+                                                      part_referenced,
                                                       &wakeup_hb_checker);
                         if (part_referenced)
                                 xpc_part_deref(part);
diff --git a/drivers/video/au1200fb.c b/drivers/video/au1200fb.c
index e77e8e4280fb..4ea187d93768 100644
--- a/drivers/video/au1200fb.c
+++ b/drivers/video/au1200fb.c
@@ -1079,7 +1079,7 @@ static int au1200fb_fb_check_var(struct fb_var_screeninfo *var,
          * clock can only be obtain by dividing this value by an even integer.
          * Fallback to a slower pixel clock if necessary. */
         pixclock = max((u32)(PICOS2KHZ(var->pixclock) * 1000), fbi->monspecs.dclkmin);
-        pixclock = min(pixclock, min(fbi->monspecs.dclkmax, (u32)AU1200_LCD_MAX_CLK/2));
+        pixclock = min3(pixclock, fbi->monspecs.dclkmax, (u32)AU1200_LCD_MAX_CLK/2);
 
         if (AU1200_LCD_MAX_CLK % pixclock) {
                 int diff = AU1200_LCD_MAX_CLK % pixclock;
diff --git a/firmware/ihex2fw.c b/firmware/ihex2fw.c
index 5a03ba8c8364..ba0cf0b601bb 100644
--- a/firmware/ihex2fw.c
+++ b/firmware/ihex2fw.c
@@ -55,6 +55,7 @@ static int output_records(int outfd);
 
 static int sort_records = 0;
 static int wide_records = 0;
+static int include_jump = 0;
 
 static int usage(void)
 {
@@ -63,6 +64,7 @@ static int usage(void)
         fprintf(stderr, "usage: ihex2fw [<options>] <src.HEX> <dst.fw>\n");
         fprintf(stderr, "       -w: wide records (16-bit length)\n");
         fprintf(stderr, "       -s: sort records by address\n");
+        fprintf(stderr, "       -j: include records for CS:IP/EIP address\n");
         return 1;
 }
 
@@ -73,7 +75,7 @@ int main(int argc, char **argv)
         uint8_t *data;
         int opt;
 
-        while ((opt = getopt(argc, argv, "ws")) != -1) {
+        while ((opt = getopt(argc, argv, "wsj")) != -1) {
                 switch (opt) {
                 case 'w':
                         wide_records = 1;
@@ -81,7 +83,9 @@ int main(int argc, char **argv)
                 case 's':
                         sort_records = 1;
                         break;
-                default:
+                case 'j':
+                        include_jump = 1;
+                        break;
                         return usage();
                 }
         }
@@ -128,6 +132,7 @@ static int process_ihex(uint8_t *data, ssize_t size)
 {
         struct ihex_binrec *record;
         uint32_t offset = 0;
+        uint32_t data32;
         uint8_t type, crc = 0, crcbyte = 0;
         int i, j;
         int line = 1;
@@ -223,8 +228,14 @@ next_record:
                         return -EINVAL;
                 }
 
+                memcpy(&data32, &record->data[0], sizeof(data32));
+                data32 = htonl(data32);
+                memcpy(&record->data[0], &data32, sizeof(data32));
+
                 /* These records contain the CS/IP or EIP where execution
-                 * starts. Don't really know what to do with them. */
+                 * starts. If requested output this as a record. */
+                if (include_jump)
+                        file_record(record);
                 goto next_record;
 
         default:
diff --git a/fs/Kconfig b/fs/Kconfig
index 65781de44fc0..b5e582bd769d 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -47,6 +47,9 @@ source "fs/nilfs2/Kconfig"
 
 endif # BLOCK
 
+config EXPORTFS
+        tristate
+
 config FILE_LOCKING
         bool "Enable POSIX file locking API" if EMBEDDED
         default y
@@ -222,9 +225,6 @@ config LOCKD_V4
         depends on FILE_LOCKING
         default y
 
-config EXPORTFS
-        tristate
-
 config NFS_ACL_SUPPORT
         tristate
         select FS_POSIX_ACL
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 722743b152d8..15690bb1d3b5 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -438,7 +438,6 @@ no_more:
  */
 int afs_writepage(struct page *page, struct writeback_control *wbc)
 {
-        struct backing_dev_info *bdi = page->mapping->backing_dev_info;
         struct afs_writeback *wb;
         int ret;
 
@@ -455,8 +454,6 @@ int afs_writepage(struct page *page, struct writeback_control *wbc)
         }
 
         wbc->nr_to_write -= ret;
-        if (wbc->nonblocking && bdi_write_congested(bdi))
-                wbc->encountered_congestion = 1;
 
         _leave(" = 0");
         return 0;
@@ -469,7 +466,6 @@ static int afs_writepages_region(struct address_space *mapping,
                                  struct writeback_control *wbc,
                                  pgoff_t index, pgoff_t end, pgoff_t *_next)
 {
-        struct backing_dev_info *bdi = mapping->backing_dev_info;
         struct afs_writeback *wb;
         struct page *page;
         int ret, n;
@@ -529,11 +525,6 @@ static int afs_writepages_region(struct address_space *mapping,
 
                 wbc->nr_to_write -= ret;
 
-                if (wbc->nonblocking && bdi_write_congested(bdi)) {
-                        wbc->encountered_congestion = 1;
-                        break;
-                }
-
                 cond_resched();
         } while (index < end && wbc->nr_to_write > 0);
 
@@ -548,24 +539,16 @@ static int afs_writepages_region(struct address_space *mapping,
 int afs_writepages(struct address_space *mapping,
                    struct writeback_control *wbc)
 {
-        struct backing_dev_info *bdi = mapping->backing_dev_info;
         pgoff_t start, end, next;
         int ret;
 
         _enter("");
 
-        if (wbc->nonblocking && bdi_write_congested(bdi)) {
-                wbc->encountered_congestion = 1;
-                _leave(" = 0 [congest]");
-                return 0;
-        }
-
         if (wbc->range_cyclic) {
                 start = mapping->writeback_index;
                 end = -1;
                 ret = afs_writepages_region(mapping, wbc, start, end, &next);
-                if (start > 0 && wbc->nr_to_write > 0 && ret == 0 &&
-                    !(wbc->nonblocking && wbc->encountered_congestion))
+                if (start > 0 && wbc->nr_to_write > 0 && ret == 0)
                         ret = afs_writepages_region(mapping, wbc, 0, start,
                                                     &next);
                 mapping->writeback_index = next;
diff --git a/fs/buffer.c b/fs/buffer.c
index 7f0b9b083f77..8d595ab2aed1 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -905,7 +905,6 @@ try_again:
 
                 bh->b_state = 0;
                 atomic_set(&bh->b_count, 0);
-                bh->b_private = NULL;
                 bh->b_size = size;
 
                 /* Link the buffer to its page */
@@ -1706,7 +1705,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
                  * and kswapd activity, but those code paths have their own
                  * higher-level throttling.
                  */
-                if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+                if (wbc->sync_mode != WB_SYNC_NONE) {
                         lock_buffer(bh);
                 } else if (!trylock_buffer(bh)) {
                         redirty_page_for_writepage(wbc, page);
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 51bcc5ce3230..e9c874abc9e1 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -591,7 +591,6 @@ static int ceph_writepages_start(struct address_space *mapping,
                                  struct writeback_control *wbc)
 {
         struct inode *inode = mapping->host;
-        struct backing_dev_info *bdi = mapping->backing_dev_info;
         struct ceph_inode_info *ci = ceph_inode(inode);
         struct ceph_fs_client *fsc;
         pgoff_t index, start, end;
@@ -633,13 +632,6 @@ static int ceph_writepages_start(struct address_space *mapping,
 
         pagevec_init(&pvec, 0);
 
-        /* ?? */
-        if (wbc->nonblocking && bdi_write_congested(bdi)) {
-                dout(" writepages congested\n");
-                wbc->encountered_congestion = 1;
-                goto out_final;
-        }
-
         /* where to start/end? */
         if (wbc->range_cyclic) {
                 start = mapping->writeback_index; /* Start from prev offset */
@@ -885,7 +877,6 @@ out:
                 rc = 0;  /* vfs expects us to return 0 */
         ceph_put_snap_context(snapc);
         dout("writepages done, rc = %d\n", rc);
-out_final:
         return rc;
 }
 
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 8c81e7b14d53..45af003865d2 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1303,7 +1303,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 static int cifs_writepages(struct address_space *mapping,
                            struct writeback_control *wbc)
 {
-        struct backing_dev_info *bdi = mapping->backing_dev_info;
         unsigned int bytes_to_write;
         unsigned int bytes_written;
         struct cifs_sb_info *cifs_sb;
@@ -1326,15 +1325,6 @@ static int cifs_writepages(struct address_space *mapping,
         int scanned = 0;
         int xid, long_op;
 
-        /*
-         * BB: Is this meaningful for a non-block-device file system?
-         * If it is, we should test it again after we do I/O
-         */
-        if (wbc->nonblocking && bdi_write_congested(bdi)) {
-                wbc->encountered_congestion = 1;
-                return 0;
-        }
-
         cifs_sb = CIFS_SB(mapping->host->i_sb);
 
         /*
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 48d74c7391d1..85882f6ba5f7 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -218,7 +218,7 @@ static struct page *dio_get_page(struct dio *dio)
  * filesystems can use it to hold additional state between get_block calls and
  * dio_complete.
  */
-static int dio_complete(struct dio *dio, loff_t offset, int ret, bool is_async)
+static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is_async)
 {
         ssize_t transferred = 0;
 
diff --git a/fs/exec.c b/fs/exec.c
index 6d2b6f936858..3aa75b8888a1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -54,6 +54,7 @@
 #include <linux/fsnotify.h>
 #include <linux/fs_struct.h>
 #include <linux/pipe_fs_i.h>
+#include <linux/oom.h>
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
@@ -759,6 +760,10 @@ static int exec_mmap(struct mm_struct *mm)
         tsk->mm = mm;
         tsk->active_mm = mm;
         activate_mm(active_mm, mm);
+        if (old_mm && tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) {
+                atomic_dec(&old_mm->oom_disable_count);
+                atomic_inc(&tsk->mm->oom_disable_count);
+        }
         task_unlock(tsk);
         arch_pick_mmap_layout(mm);
         if (old_mm) {
diff --git a/fs/file_table.c b/fs/file_table.c
index a04bdd81c11c..c3dee381f1b4 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -60,7 +60,7 @@ static inline void file_free(struct file *f)
 /*
  * Return the total number of open files in the system
  */
-static int get_nr_files(void)
+static long get_nr_files(void)
 {
         return percpu_counter_read_positive(&nr_files);
 }
@@ -68,7 +68,7 @@ static int get_nr_files(void)
 /*
  * Return the maximum number of open files in the system
  */
-int get_max_files(void)
+unsigned long get_max_files(void)
 {
         return files_stat.max_files;
 }
@@ -82,7 +82,7 @@ int proc_nr_files(ctl_table *table, int write,
                      void __user *buffer, size_t *lenp, loff_t *ppos)
 {
         files_stat.nr_files = get_nr_files();
-        return proc_dointvec(table, write, buffer, lenp, ppos);
+        return proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
 }
 #else
 int proc_nr_files(ctl_table *table, int write,
@@ -105,7 +105,7 @@ int proc_nr_files(ctl_table *table, int write,
 struct file *get_empty_filp(void)
 {
         const struct cred *cred = current_cred();
-        static int old_max;
+        static long old_max;
         struct file * f;
 
         /*
@@ -140,8 +140,7 @@ struct file *get_empty_filp(void)
 over:
         /* Ran out of filps - report that */
         if (get_nr_files() > old_max) {
-                printk(KERN_INFO "VFS: file-max limit %d reached\n",
-                                        get_max_files());
+                pr_info("VFS: file-max limit %lu reached\n", get_max_files());
                 old_max = get_nr_files();
         }
         goto fail;
@@ -487,7 +486,7 @@ retry:
 
 void __init files_init(unsigned long mempages)
 { 
-        int n; 
+        unsigned long n;
 
         filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,
                         SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);
@@ -498,9 +497,7 @@ void __init files_init(unsigned long mempages)
          */ 
 
         n = (mempages * (PAGE_SIZE / 1024)) / 10;
-        files_stat.max_files = n; 
-        if (files_stat.max_files < NR_FILE)
-                files_stat.max_files = NR_FILE;
+        files_stat.max_files = max_t(unsigned long, n, NR_FILE);
         files_defer_init();
         lg_lock_init(files_lglock);
         percpu_counter_init(&nr_files, 0);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ab38fef1c9a1..9e46aec10d1a 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -582,7 +582,7 @@ static inline bool over_bground_thresh(void)
         global_dirty_limits(&background_thresh, &dirty_thresh);
 
         return (global_page_state(NR_FILE_DIRTY) +
-                global_page_state(NR_UNSTABLE_NFS) >= background_thresh);
+                global_page_state(NR_UNSTABLE_NFS) > background_thresh);
 }
 
 /*
@@ -721,6 +721,10 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb)
                 return 0;
 
         wb->last_old_flush = jiffies;
+        /*
+         * Add in the number of potentially dirty inodes, because each inode
+         * write can dirty pagecache in the underlying blockdev.
+         */
         nr_pages = global_page_state(NR_FILE_DIRTY) +
                         global_page_state(NR_UNSTABLE_NFS) +
                         (inodes_stat.nr_inodes - inodes_stat.nr_unused);
@@ -790,7 +794,7 @@ int bdi_writeback_thread(void *data)
         struct backing_dev_info *bdi = wb->bdi;
         long pages_written;
 
-        current->flags |= PF_FLUSHER | PF_SWAPWRITE;
+        current->flags |= PF_SWAPWRITE;
         set_freezable();
         wb->last_active = jiffies;
 
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index cde755cca564..b98664275f02 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -809,11 +809,9 @@ static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep,
         int err;
         struct page *page = *pagep;
 
-        if (page && zeroing && count < PAGE_SIZE) {
-                void *mapaddr = kmap_atomic(page, KM_USER1);
-                memset(mapaddr, 0, PAGE_SIZE);
-                kunmap_atomic(mapaddr, KM_USER1);
-        }
+        if (page && zeroing && count < PAGE_SIZE)
+                clear_highpage(page);
+
         while (count) {
                 if (cs->write && cs->pipebufs && page) {
                         return fuse_ref_page(cs, page, offset, count);
@@ -830,10 +828,10 @@ static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep,
                         }
                 }
                 if (page) {
-                        void *mapaddr = kmap_atomic(page, KM_USER1);
+                        void *mapaddr = kmap_atomic(page, KM_USER0);
                         void *buf = mapaddr + offset;
                         offset += fuse_copy_do(cs, &buf, &count);
-                        kunmap_atomic(mapaddr, KM_USER1);
+                        kunmap_atomic(mapaddr, KM_USER0);
                 } else
                         offset += fuse_copy_do(cs, NULL, &count);
         }
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index f3b071f921aa..939739c7b3f9 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -55,7 +55,7 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
                  * activity, but those code paths have their own higher-level
                  * throttling.
                  */
-                if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+                if (wbc->sync_mode != WB_SYNC_NONE) {
                         lock_buffer(bh);
                 } else if (!trylock_buffer(bh)) {
                         redirty_page_for_writepage(wbc, page);
diff --git a/fs/hostfs/hostfs.h b/fs/hostfs/hostfs.h
index 7c232c1487ee..bf15a43016b9 100644
--- a/fs/hostfs/hostfs.h
+++ b/fs/hostfs/hostfs.h
@@ -91,7 +91,6 @@ extern int rename_file(char *from, char *to);
 extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
                      long long *bfree_out, long long *bavail_out,
                      long long *files_out, long long *ffree_out,
-                     void *fsid_out, int fsid_size, long *namelen_out,
-                     long *spare_out);
+                     void *fsid_out, int fsid_size, long *namelen_out);
 
 #endif
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index f7dc9b5f9ef8..cd7c93917cc7 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -217,7 +217,7 @@ int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
         err = do_statfs(dentry->d_sb->s_fs_info,
                         &sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
                         &f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
-                        &sf->f_namelen, sf->f_spare);
+                        &sf->f_namelen);
         if (err)
                 return err;
         sf->f_blocks = f_blocks;
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index 6777aa06ce2c..d51a98384bc0 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -94,8 +94,7 @@ void *open_dir(char *path, int *err_out)
 
         dir = opendir(path);
         *err_out = errno;
-        if (dir == NULL)
-                return NULL;
+
         return dir;
 }
 
@@ -205,7 +204,7 @@ int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
         if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
                 if (fd >= 0) {
                         if (fchmod(fd, attrs->ia_mode) != 0)
-                                return (-errno);
+                                return -errno;
                 } else if (chmod(file, attrs->ia_mode) != 0) {
                         return -errno;
                 }
@@ -364,8 +363,7 @@ int rename_file(char *from, char *to)
 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
               long long *bfree_out, long long *bavail_out,
               long long *files_out, long long *ffree_out,
-              void *fsid_out, int fsid_size, long *namelen_out,
-              long *spare_out)
+              void *fsid_out, int fsid_size, long *namelen_out)
 {
         struct statfs64 buf;
         int err;
@@ -384,10 +382,6 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
                sizeof(buf.f_fsid) > fsid_size ? fsid_size :
                sizeof(buf.f_fsid));
         *namelen_out = buf.f_namelen;
-        spare_out[0] = buf.f_spare[0];
-        spare_out[1] = buf.f_spare[1];
-        spare_out[2] = buf.f_spare[2];
-        spare_out[3] = buf.f_spare[3];
-        spare_out[4] = buf.f_spare[4];
+
         return 0;
 }
diff --git a/fs/locks.c b/fs/locks.c
index 8b2b6ad56a09..4de3a2666810 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -2109,7 +2109,7 @@ EXPORT_SYMBOL_GPL(vfs_cancel_lock);
 #include <linux/seq_file.h>
 
 static void lock_get_status(struct seq_file *f, struct file_lock *fl,
-                                                        int id, char *pfx)
+                            loff_t id, char *pfx)
 {
         struct inode *inode = NULL;
         unsigned int fl_pid;
@@ -2122,7 +2122,7 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
         if (fl->fl_file != NULL)
                 inode = fl->fl_file->f_path.dentry->d_inode;
 
-        seq_printf(f, "%d:%s ", id, pfx);
+        seq_printf(f, "%lld:%s ", id, pfx);
         if (IS_POSIX(fl)) {
                 seq_printf(f, "%6s %s ",
                              (fl->fl_flags & FL_ACCESS) ? "ACCESS" : "POSIX ",
@@ -2185,24 +2185,27 @@ static int locks_show(struct seq_file *f, void *v)
 
         fl = list_entry(v, struct file_lock, fl_link);
 
-        lock_get_status(f, fl, (long)f->private, "");
+        lock_get_status(f, fl, *((loff_t *)f->private), "");
 
         list_for_each_entry(bfl, &fl->fl_block, fl_block)
-                lock_get_status(f, bfl, (long)f->private, " ->");
+                lock_get_status(f, bfl, *((loff_t *)f->private), " ->");
 
-        f->private++;
         return 0;
 }
 
 static void *locks_start(struct seq_file *f, loff_t *pos)
 {
+        loff_t *p = f->private;
+
         lock_flocks();
-        f->private = (void *)1;
+        *p = (*pos + 1);
         return seq_list_start(&file_lock_list, *pos);
 }
 
 static void *locks_next(struct seq_file *f, void *v, loff_t *pos)
 {
+        loff_t *p = f->private;
+        ++*p;
         return seq_list_next(v, &file_lock_list, pos);
 }
 
@@ -2220,14 +2223,14 @@ static const struct seq_operations locks_seq_operations = {
 
 static int locks_open(struct inode *inode, struct file *filp)
 {
-        return seq_open(filp, &locks_seq_operations);
+        return seq_open_private(filp, &locks_seq_operations, sizeof(loff_t));
 }
 
 static const struct file_operations proc_locks_operations = {
         .open           = locks_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
-        .release        = seq_release,
+        .release        = seq_release_private,
 };
 
 static int __init proc_locks_init(void)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 605e292501f4..4c14c17a5276 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -290,9 +290,7 @@ static int nfs_do_writepage(struct page *page, struct writeback_control *wbc, st
         nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1);
 
         nfs_pageio_cond_complete(pgio, page->index);
-        ret = nfs_page_async_flush(pgio, page,
-                        wbc->sync_mode == WB_SYNC_NONE ||
-                        wbc->nonblocking != 0);
+        ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE);
         if (ret == -EAGAIN) {
                 redirty_page_for_writepage(wbc, page);
                 ret = 0;
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index d926af626177..687d090cea34 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1609,7 +1609,7 @@ nilfs_copy_replace_page_buffers(struct page *page, struct list_head *out)
         kunmap_atomic(kaddr, KM_USER0);
 
         if (!TestSetPageWriteback(clone_page))
-                inc_zone_page_state(clone_page, NR_WRITEBACK);
+                account_page_writeback(clone_page);
         unlock_page(clone_page);
 
         return 0;
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 50f8f0600f06..6a0068841d96 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -33,8 +33,8 @@ config PROC_KCORE
         depends on PROC_FS && MMU
 
 config PROC_VMCORE
-        bool "/proc/vmcore support (EXPERIMENTAL)"
-        depends on PROC_FS && CRASH_DUMP
+        bool "/proc/vmcore support"
+        depends on PROC_FS && CRASH_DUMP
         default y
         help
         Exports the dump image of crashed kernel in ELF format.
diff --git a/fs/proc/base.c b/fs/proc/base.c
index dc5d5f51f3fe..53dc8ad40ae6 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1023,28 +1023,47 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
         memset(buffer, 0, sizeof(buffer));
         if (count > sizeof(buffer) - 1)
                 count = sizeof(buffer) - 1;
-        if (copy_from_user(buffer, buf, count))
-                return -EFAULT;
+        if (copy_from_user(buffer, buf, count)) {
+                err = -EFAULT;
+                goto out;
+        }
 
         err = strict_strtol(strstrip(buffer), 0, &oom_adjust);
         if (err)
-                return -EINVAL;
+                goto out;
         if ((oom_adjust < OOM_ADJUST_MIN || oom_adjust > OOM_ADJUST_MAX) &&
-             oom_adjust != OOM_DISABLE)
-                return -EINVAL;
+             oom_adjust != OOM_DISABLE) {
+                err = -EINVAL;
+                goto out;
+        }
 
         task = get_proc_task(file->f_path.dentry->d_inode);
-        if (!task)
-                return -ESRCH;
+        if (!task) {
+                err = -ESRCH;
+                goto out;
+        }
+
+        task_lock(task);
+        if (!task->mm) {
+                err = -EINVAL;
+                goto err_task_lock;
+        }
+
         if (!lock_task_sighand(task, &flags)) {
-                put_task_struct(task);
-                return -ESRCH;
+                err = -ESRCH;
+                goto err_task_lock;
         }
 
         if (oom_adjust < task->signal->oom_adj && !capable(CAP_SYS_RESOURCE)) {
-                unlock_task_sighand(task, &flags);
-                put_task_struct(task);
-                return -EACCES;
+                err = -EACCES;
+                goto err_sighand;
+        }
+
+        if (oom_adjust != task->signal->oom_adj) {
+                if (oom_adjust == OOM_DISABLE)
+                        atomic_inc(&task->mm->oom_disable_count);
+                if (task->signal->oom_adj == OOM_DISABLE)
+                        atomic_dec(&task->mm->oom_disable_count);
         }
 
         /*
@@ -1065,10 +1084,13 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
         else
                 task->signal->oom_score_adj = (oom_adjust * OOM_SCORE_ADJ_MAX) /
                                                                 -OOM_DISABLE;
+err_sighand:
         unlock_task_sighand(task, &flags);
+err_task_lock:
+        task_unlock(task);
         put_task_struct(task);
-
-        return count;
+out:
+        return err < 0 ? err : count;
 }
 
 static const struct file_operations proc_oom_adjust_operations = {
@@ -1109,30 +1131,49 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
         memset(buffer, 0, sizeof(buffer));
         if (count > sizeof(buffer) - 1)
                 count = sizeof(buffer) - 1;
-        if (copy_from_user(buffer, buf, count))
-                return -EFAULT;
+        if (copy_from_user(buffer, buf, count)) {
+                err = -EFAULT;
+                goto out;
+        }
 
         err = strict_strtol(strstrip(buffer), 0, &oom_score_adj);
         if (err)
-                return -EINVAL;
+                goto out;
         if (oom_score_adj < OOM_SCORE_ADJ_MIN ||
-                        oom_score_adj > OOM_SCORE_ADJ_MAX)
-                return -EINVAL;
+                        oom_score_adj > OOM_SCORE_ADJ_MAX) {
+                err = -EINVAL;
+                goto out;
+        }
 
         task = get_proc_task(file->f_path.dentry->d_inode);
-        if (!task)
-                return -ESRCH;
+        if (!task) {
+                err = -ESRCH;
+                goto out;
+        }
+
+        task_lock(task);
+        if (!task->mm) {
+                err = -EINVAL;
+                goto err_task_lock;
+        }
+
         if (!lock_task_sighand(task, &flags)) {
-                put_task_struct(task);
-                return -ESRCH;
+                err = -ESRCH;
+                goto err_task_lock;
         }
+
         if (oom_score_adj < task->signal->oom_score_adj &&
                         !capable(CAP_SYS_RESOURCE)) {
-                unlock_task_sighand(task, &flags);
-                put_task_struct(task);
-                return -EACCES;
+                err = -EACCES;
+                goto err_sighand;
         }
 
+        if (oom_score_adj != task->signal->oom_score_adj) {
+                if (oom_score_adj == OOM_SCORE_ADJ_MIN)
+                        atomic_inc(&task->mm->oom_disable_count);
+                if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+                        atomic_dec(&task->mm->oom_disable_count);
+        }
         task->signal->oom_score_adj = oom_score_adj;
         /*
          * Scale /proc/pid/oom_adj appropriately ensuring that OOM_DISABLE is
@@ -1143,9 +1184,13 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
         else
                 task->signal->oom_adj = (oom_score_adj * OOM_ADJUST_MAX) /
                                                         OOM_SCORE_ADJ_MAX;
+err_sighand:
         unlock_task_sighand(task, &flags);
+err_task_lock:
+        task_unlock(task);
         put_task_struct(task);
-        return count;
+out:
+        return err < 0 ? err : count;
 }
 
 static const struct file_operations proc_oom_score_adj_operations = {
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index caa758377d66..c1f93896cb53 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2438,7 +2438,7 @@ static int reiserfs_write_full_page(struct page *page,
                 /* from this point on, we know the buffer is mapped to a
                  * real block and not a direct item
                  */
-                if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+                if (wbc->sync_mode != WB_SYNC_NONE) {
                         lock_buffer(bh);
                 } else {
                         if (!trylock_buffer(bh)) {
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index b552f816de15..c9af48fffcd7 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1139,8 +1139,7 @@ xfs_vm_writepage(
                                 type = IO_DELAY;
                                 flags = BMAPI_ALLOCATE;
 
-                                if (wbc->sync_mode == WB_SYNC_NONE &&
-                                    wbc->nonblocking)
+                                if (wbc->sync_mode == WB_SYNC_NONE)
                                         flags |= BMAPI_TRYLOCK;
                         }
 
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f4229fb315e1..2c0fc10956ba 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -150,6 +150,7 @@
 #define DATA_DATA                                                       \
         *(.data)                                                        \
         *(.ref.data)                                                    \
+        *(.data..shared_aligned) /* percpu related */                   \
         DEV_KEEP(init.data)                                             \
         DEV_KEEP(exit.data)                                             \
         CPU_KEEP(init.data)                                             \
@@ -636,7 +637,7 @@
 
 #ifdef CONFIG_BLK_DEV_INITRD
 #define INIT_RAM_FS                                                     \
-        . = ALIGN(PAGE_SIZE);                                           \
+        . = ALIGN(4);                                                   \
         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
         *(.init.ramfs)                                                  \
         VMLINUX_SYMBOL(__initramfs_end) = .;
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 35b00746c712..4ce34fa937d4 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -111,6 +111,7 @@ void bdi_wakeup_thread_delayed(struct backing_dev_info *bdi);
 
 extern spinlock_t bdi_lock;
 extern struct list_head bdi_list;
+extern struct list_head bdi_pending_list;
 
 static inline int wb_has_dirty_io(struct bdi_writeback *wb)
 {
@@ -285,7 +286,7 @@ enum {
 void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
 void set_bdi_congested(struct backing_dev_info *bdi, int sync);
 long congestion_wait(int sync, long timeout);
-
+long wait_iff_congested(struct zone *zone, int sync, long timeout);
 
 static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi)
 {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index bb20373d0b46..4658777b41cc 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -34,9 +34,9 @@
 
 /* And dynamically-tunable limits and defaults: */
 struct files_stat_struct {
-        int nr_files;           /* read only */
-        int nr_free_files;      /* read only */
-        int max_files;          /* tunable */
+        unsigned long nr_files;         /* read only */
+        unsigned long nr_free_files;    /* read only */
+        unsigned long max_files;                /* tunable */
 };
 
 struct inodes_stat_t {
@@ -402,7 +402,7 @@ extern void __init inode_init_early(void);
 extern void __init files_init(unsigned long);
 
 extern struct files_stat_struct files_stat;
-extern int get_max_files(void);
+extern unsigned long get_max_files(void);
 extern int sysctl_nr_open;
 extern struct inodes_stat_t inodes_stat;
 extern int leases_enable, lease_break_time;
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 975609cb8548..e8713d55360a 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -9,6 +9,32 @@
 
 struct vm_area_struct;
 
+/* Plain integer GFP bitmasks. Do not use this directly. */
+#define ___GFP_DMA              0x01u
+#define ___GFP_HIGHMEM          0x02u
+#define ___GFP_DMA32            0x04u
+#define ___GFP_MOVABLE          0x08u
+#define ___GFP_WAIT             0x10u
+#define ___GFP_HIGH             0x20u
+#define ___GFP_IO               0x40u
+#define ___GFP_FS               0x80u
+#define ___GFP_COLD             0x100u
+#define ___GFP_NOWARN           0x200u
+#define ___GFP_REPEAT           0x400u
+#define ___GFP_NOFAIL           0x800u
+#define ___GFP_NORETRY          0x1000u
+#define ___GFP_COMP             0x4000u
+#define ___GFP_ZERO             0x8000u
+#define ___GFP_NOMEMALLOC       0x10000u
+#define ___GFP_HARDWALL         0x20000u
+#define ___GFP_THISNODE         0x40000u
+#define ___GFP_RECLAIMABLE      0x80000u
+#ifdef CONFIG_KMEMCHECK
+#define ___GFP_NOTRACK          0x200000u
+#else
+#define ___GFP_NOTRACK          0
+#endif
+
 /*
  * GFP bitmasks..
  *
@@ -18,10 +44,10 @@ struct vm_area_struct;
  * without the underscores and use them consistently. The definitions here may
  * be used in bit comparisons.
  */
-#define __GFP_DMA       ((__force gfp_t)0x01u)
-#define __GFP_HIGHMEM   ((__force gfp_t)0x02u)
-#define __GFP_DMA32     ((__force gfp_t)0x04u)
-#define __GFP_MOVABLE   ((__force gfp_t)0x08u)  /* Page is movable */
+#define __GFP_DMA       ((__force gfp_t)___GFP_DMA)
+#define __GFP_HIGHMEM   ((__force gfp_t)___GFP_HIGHMEM)
+#define __GFP_DMA32     ((__force gfp_t)___GFP_DMA32)
+#define __GFP_MOVABLE   ((__force gfp_t)___GFP_MOVABLE)  /* Page is movable */
 #define GFP_ZONEMASK    (__GFP_DMA|__GFP_HIGHMEM|__GFP_DMA32|__GFP_MOVABLE)
 /*
  * Action modifiers - doesn't change the zoning
@@ -38,27 +64,22 @@ struct vm_area_struct;
  * __GFP_MOVABLE: Flag that this page will be movable by the page migration
  * mechanism or reclaimed
  */
-#define __GFP_WAIT      ((__force gfp_t)0x10u)  /* Can wait and reschedule? */
-#define __GFP_HIGH      ((__force gfp_t)0x20u)  /* Should access emergency pools? */
-#define __GFP_IO        ((__force gfp_t)0x40u)  /* Can start physical IO? */
-#define __GFP_FS        ((__force gfp_t)0x80u)  /* Can call down to low-level FS? */
-#define __GFP_COLD      ((__force gfp_t)0x100u) /* Cache-cold page required */
-#define __GFP_NOWARN    ((__force gfp_t)0x200u) /* Suppress page allocation failure warning */
-#define __GFP_REPEAT    ((__force gfp_t)0x400u) /* See above */
-#define __GFP_NOFAIL    ((__force gfp_t)0x800u) /* See above */
-#define __GFP_NORETRY   ((__force gfp_t)0x1000u)/* See above */
-#define __GFP_COMP      ((__force gfp_t)0x4000u)/* Add compound page metadata */
-#define __GFP_ZERO      ((__force gfp_t)0x8000u)/* Return zeroed page on success */
-#define __GFP_NOMEMALLOC ((__force gfp_t)0x10000u) /* Don't use emergency reserves */
-#define __GFP_HARDWALL   ((__force gfp_t)0x20000u) /* Enforce hardwall cpuset memory allocs */
-#define __GFP_THISNODE  ((__force gfp_t)0x40000u)/* No fallback, no policies */
-#define __GFP_RECLAIMABLE ((__force gfp_t)0x80000u) /* Page is reclaimable */
-
-#ifdef CONFIG_KMEMCHECK
-#define __GFP_NOTRACK   ((__force gfp_t)0x200000u)  /* Don't track with kmemcheck */
-#else
-#define __GFP_NOTRACK   ((__force gfp_t)0)
-#endif
+#define __GFP_WAIT      ((__force gfp_t)___GFP_WAIT)    /* Can wait and reschedule? */
+#define __GFP_HIGH      ((__force gfp_t)___GFP_HIGH)    /* Should access emergency pools? */
+#define __GFP_IO        ((__force gfp_t)___GFP_IO)      /* Can start physical IO? */
+#define __GFP_FS        ((__force gfp_t)___GFP_FS)      /* Can call down to low-level FS? */
+#define __GFP_COLD      ((__force gfp_t)___GFP_COLD)    /* Cache-cold page required */
+#define __GFP_NOWARN    ((__force gfp_t)___GFP_NOWARN)  /* Suppress page allocation failure warning */
+#define __GFP_REPEAT    ((__force gfp_t)___GFP_REPEAT)  /* See above */
+#define __GFP_NOFAIL    ((__force gfp_t)___GFP_NOFAIL)  /* See above */
+#define __GFP_NORETRY   ((__force gfp_t)___GFP_NORETRY) /* See above */
+#define __GFP_COMP      ((__force gfp_t)___GFP_COMP)    /* Add compound page metadata */
+#define __GFP_ZERO      ((__force gfp_t)___GFP_ZERO)    /* Return zeroed page on success */
+#define __GFP_NOMEMALLOC ((__force gfp_t)___GFP_NOMEMALLOC) /* Don't use emergency reserves */
+#define __GFP_HARDWALL   ((__force gfp_t)___GFP_HARDWALL) /* Enforce hardwall cpuset memory allocs */
+#define __GFP_THISNODE  ((__force gfp_t)___GFP_THISNODE)/* No fallback, no policies */
+#define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE) /* Page is reclaimable */
+#define __GFP_NOTRACK   ((__force gfp_t)___GFP_NOTRACK)  /* Don't track with kmemcheck */
 
 /*
  * This may seem redundant, but it's a way of annotating false positives vs.
@@ -186,14 +207,14 @@ static inline int allocflags_to_migratetype(gfp_t gfp_flags)
 #endif
 
 #define GFP_ZONE_TABLE ( \
-        (ZONE_NORMAL << 0 * ZONES_SHIFT)                                \
-        | (OPT_ZONE_DMA << __GFP_DMA * ZONES_SHIFT)                     \
-        | (OPT_ZONE_HIGHMEM << __GFP_HIGHMEM * ZONES_SHIFT)             \
-        | (OPT_ZONE_DMA32 << __GFP_DMA32 * ZONES_SHIFT)                 \
-        | (ZONE_NORMAL << __GFP_MOVABLE * ZONES_SHIFT)                  \
-        | (OPT_ZONE_DMA << (__GFP_MOVABLE | __GFP_DMA) * ZONES_SHIFT)   \
-        | (ZONE_MOVABLE << (__GFP_MOVABLE | __GFP_HIGHMEM) * ZONES_SHIFT)\
-        | (OPT_ZONE_DMA32 << (__GFP_MOVABLE | __GFP_DMA32) * ZONES_SHIFT)\
+        (ZONE_NORMAL << 0 * ZONES_SHIFT)                                      \
+        | (OPT_ZONE_DMA << ___GFP_DMA * ZONES_SHIFT)                          \
+        | (OPT_ZONE_HIGHMEM << ___GFP_HIGHMEM * ZONES_SHIFT)                  \
+        | (OPT_ZONE_DMA32 << ___GFP_DMA32 * ZONES_SHIFT)                      \
+        | (ZONE_NORMAL << ___GFP_MOVABLE * ZONES_SHIFT)                       \
+        | (OPT_ZONE_DMA << (___GFP_MOVABLE | ___GFP_DMA) * ZONES_SHIFT)       \
+        | (ZONE_MOVABLE << (___GFP_MOVABLE | ___GFP_HIGHMEM) * ZONES_SHIFT)   \
+        | (OPT_ZONE_DMA32 << (___GFP_MOVABLE | ___GFP_DMA32) * ZONES_SHIFT)   \
 )
 
 /*
@@ -203,20 +224,20 @@ static inline int allocflags_to_migratetype(gfp_t gfp_flags)
  * allowed.
  */
 #define GFP_ZONE_BAD ( \
-        1 << (__GFP_DMA | __GFP_HIGHMEM)                                \
-        | 1 << (__GFP_DMA | __GFP_DMA32)                                \
-        | 1 << (__GFP_DMA32 | __GFP_HIGHMEM)                            \
-        | 1 << (__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM)                \
-        | 1 << (__GFP_MOVABLE | __GFP_HIGHMEM | __GFP_DMA)              \
-        | 1 << (__GFP_MOVABLE | __GFP_DMA32 | __GFP_DMA)                \
-        | 1 << (__GFP_MOVABLE | __GFP_DMA32 | __GFP_HIGHMEM)            \
-        | 1 << (__GFP_MOVABLE | __GFP_DMA32 | __GFP_DMA | __GFP_HIGHMEM)\
+        1 << (___GFP_DMA | ___GFP_HIGHMEM)                                    \
+        | 1 << (___GFP_DMA | ___GFP_DMA32)                                    \
+        | 1 << (___GFP_DMA32 | ___GFP_HIGHMEM)                                \
+        | 1 << (___GFP_DMA | ___GFP_DMA32 | ___GFP_HIGHMEM)                   \
+        | 1 << (___GFP_MOVABLE | ___GFP_HIGHMEM | ___GFP_DMA)                 \
+        | 1 << (___GFP_MOVABLE | ___GFP_DMA32 | ___GFP_DMA)                   \
+        | 1 << (___GFP_MOVABLE | ___GFP_DMA32 | ___GFP_HIGHMEM)               \
+        | 1 << (___GFP_MOVABLE | ___GFP_DMA32 | ___GFP_DMA | ___GFP_HIGHMEM)  \
 )
 
 static inline enum zone_type gfp_zone(gfp_t flags)
 {
         enum zone_type z;
-        int bit = flags & GFP_ZONEMASK;
+        int bit = (__force int) (flags & GFP_ZONEMASK);
 
         z = (GFP_ZONE_TABLE >> (bit * ZONES_SHIFT)) &
                                          ((1 << ZONES_SHIFT) - 1);
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index e3060ef85b6d..8a85ec109a3a 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -28,18 +28,6 @@ static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
 
 #include <asm/kmap_types.h>
 
-#ifdef CONFIG_DEBUG_HIGHMEM
-
-void debug_kmap_atomic(enum km_type type);
-
-#else
-
-static inline void debug_kmap_atomic(enum km_type type)
-{
-}
-
-#endif
-
 #ifdef CONFIG_HIGHMEM
 #include <asm/highmem.h>
 
@@ -49,6 +37,27 @@ extern unsigned long totalhigh_pages;
 
 void kmap_flush_unused(void);
 
+DECLARE_PER_CPU(int, __kmap_atomic_idx);
+
+static inline int kmap_atomic_idx_push(void)
+{
+        int idx = __get_cpu_var(__kmap_atomic_idx)++;
+#ifdef CONFIG_DEBUG_HIGHMEM
+        WARN_ON_ONCE(in_irq() && !irqs_disabled());
+        BUG_ON(idx > KM_TYPE_NR);
+#endif
+        return idx;
+}
+
+static inline int kmap_atomic_idx_pop(void)
+{
+        int idx = --__get_cpu_var(__kmap_atomic_idx);
+#ifdef CONFIG_DEBUG_HIGHMEM
+        BUG_ON(idx < 0);
+#endif
+        return idx;
+}
+
 #else /* CONFIG_HIGHMEM */
 
 static inline unsigned int nr_free_highpages(void) { return 0; }
@@ -66,19 +75,19 @@ static inline void kunmap(struct page *page)
 {
 }
 
-static inline void *kmap_atomic(struct page *page, enum km_type idx)
+static inline void *__kmap_atomic(struct page *page)
 {
         pagefault_disable();
         return page_address(page);
 }
-#define kmap_atomic_prot(page, idx, prot)       kmap_atomic(page, idx)
+#define kmap_atomic_prot(page, prot)    __kmap_atomic(page)
 
-static inline void kunmap_atomic_notypecheck(void *addr, enum km_type idx)
+static inline void __kunmap_atomic(void *addr)
 {
         pagefault_enable();
 }
 
-#define kmap_atomic_pfn(pfn, idx)       kmap_atomic(pfn_to_page(pfn), (idx))
+#define kmap_atomic_pfn(pfn)    kmap_atomic(pfn_to_page(pfn))
 #define kmap_atomic_to_page(ptr)        virt_to_page(ptr)
 
 #define kmap_flush_unused()     do {} while(0)
@@ -86,12 +95,20 @@ static inline void kunmap_atomic_notypecheck(void *addr, enum km_type idx)
 
 #endif /* CONFIG_HIGHMEM */
 
-/* Prevent people trying to call kunmap_atomic() as if it were kunmap() */
-/* kunmap_atomic() should get the return value of kmap_atomic, not the page. */
-#define kunmap_atomic(addr, idx) do { \
-                BUILD_BUG_ON(__same_type((addr), struct page *)); \
-                kunmap_atomic_notypecheck((addr), (idx)); \
-        } while (0)
+/*
+ * Make both: kmap_atomic(page, idx) and kmap_atomic(page) work.
+ */
+#define kmap_atomic(page, args...) __kmap_atomic(page)
+
+/*
+ * Prevent people trying to call kunmap_atomic() as if it were kunmap()
+ * kunmap_atomic() should get the return value of kmap_atomic, not the page.
+ */
+#define kunmap_atomic(addr, args...)                            \
+do {                                                            \
+        BUILD_BUG_ON(__same_type((addr), struct page *));       \
+        __kunmap_atomic(addr);                                  \
+} while (0)
 
 /* when CONFIG_HIGHMEM is not set these will be plain clear/copy_page */
 #ifndef clear_user_highpage
@@ -201,8 +218,8 @@ static inline void copy_user_highpage(struct page *to, struct page *from,
         vfrom = kmap_atomic(from, KM_USER0);
         vto = kmap_atomic(to, KM_USER1);
         copy_user_page(vto, vfrom, vaddr, to);
-        kunmap_atomic(vfrom, KM_USER0);
         kunmap_atomic(vto, KM_USER1);
+        kunmap_atomic(vfrom, KM_USER0);
 }
 
 #endif
@@ -214,8 +231,8 @@ static inline void copy_highpage(struct page *to, struct page *from)
         vfrom = kmap_atomic(from, KM_USER0);
         vto = kmap_atomic(to, KM_USER1);
         copy_page(vto, vfrom);
-        kunmap_atomic(vfrom, KM_USER0);
         kunmap_atomic(vto, KM_USER1);
+        kunmap_atomic(vfrom, KM_USER0);
 }
 
 #endif /* _LINUX_HIGHMEM_H */
diff --git a/include/linux/i2c/apds990x.h b/include/linux/i2c/apds990x.h
new file mode 100644
index 000000000000..d186fcc5d257
--- /dev/null
+++ b/include/linux/i2c/apds990x.h
@@ -0,0 +1,79 @@
+/*
+ * This file is part of the APDS990x sensor driver.
+ * Chip is combined proximity and ambient light sensor.
+ *
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __APDS990X_H__
+#define __APDS990X_H__
+
+
+#define APDS_IRLED_CURR_12mA    0x3
+#define APDS_IRLED_CURR_25mA    0x2
+#define APDS_IRLED_CURR_50mA    0x1
+#define APDS_IRLED_CURR_100mA   0x0
+
+/**
+ * struct apds990x_chip_factors - defines effect of the cover window
+ * @ga: Total glass attenuation
+ * @cf1: clear channel factor 1 for raw to lux conversion
+ * @irf1: IR channel factor 1 for raw to lux conversion
+ * @cf2: clear channel factor 2 for raw to lux conversion
+ * @irf2: IR channel factor 2 for raw to lux conversion
+ * @df: device factor for conversion formulas
+ *
+ * Structure for tuning ALS calculation to match with environment.
+ * Values depend on the material above the sensor and the sensor
+ * itself. If the GA is zero, driver will use uncovered sensor default values
+ * format: decimal value * APDS_PARAM_SCALE except df which is plain integer.
+ */
+#define APDS_PARAM_SCALE 4096
+struct apds990x_chip_factors {
+        int ga;
+        int cf1;
+        int irf1;
+        int cf2;
+        int irf2;
+        int df;
+};
+
+/**
+ * struct apds990x_platform_data - platform data for apsd990x.c driver
+ * @cf: chip factor data
+ * @pddrive: IR-led driving current
+ * @ppcount: number of IR pulses used for proximity estimation
+ * @setup_resources: interrupt line setup call back function
+ * @release_resources: interrupt line release call back function
+ *
+ * Proximity detection result depends heavily on correct ppcount, pdrive
+ * and cover window.
+ *
+ */
+
+struct apds990x_platform_data {
+        struct apds990x_chip_factors cf;
+        u8     pdrive;
+        u8     ppcount;
+        int    (*setup_resources)(void);
+        int    (*release_resources)(void);
+};
+
+#endif
diff --git a/include/linux/i2c/bh1770glc.h b/include/linux/i2c/bh1770glc.h
new file mode 100644
index 000000000000..8b5e2df36c72
--- /dev/null
+++ b/include/linux/i2c/bh1770glc.h
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver.
+ * Chip is combined proximity and ambient light sensor.
+ *
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __BH1770_H__
+#define __BH1770_H__
+
+/**
+ * struct bh1770_platform_data - platform data for bh1770glc driver
+ * @led_def_curr: IR led driving current.
+ * @glass_attenuation: Attenuation factor for covering window.
+ * @setup_resources: Call back for interrupt line setup function
+ * @release_resources: Call back for interrupte line release function
+ *
+ * Example of glass attenuation: 16384 * 385 / 100 means attenuation factor
+ * of 3.85. i.e. light_above_sensor = light_above_cover_window / 3.85
+ */
+
+struct bh1770_platform_data {
+#define BH1770_LED_5mA  0
+#define BH1770_LED_10mA 1
+#define BH1770_LED_20mA 2
+#define BH1770_LED_50mA 3
+#define BH1770_LED_100mA 4
+#define BH1770_LED_150mA 5
+#define BH1770_LED_200mA 6
+        __u8 led_def_curr;
+#define BH1770_NEUTRAL_GA 16384 /* 16384 / 16384 = 1 */
+        __u32 glass_attenuation;
+        int (*setup_resources)(void);
+        int (*release_resources)(void);
+};
+#endif
diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
index 7fb592793738..8cdcc2a199ad 100644
--- a/include/linux/io-mapping.h
+++ b/include/linux/io-mapping.h
@@ -81,8 +81,7 @@ io_mapping_free(struct io_mapping *mapping)
 /* Atomic map/unmap */
 static inline void __iomem *
 io_mapping_map_atomic_wc(struct io_mapping *mapping,
-                         unsigned long offset,
-                         int slot)
+                         unsigned long offset)
 {
         resource_size_t phys_addr;
         unsigned long pfn;
@@ -90,13 +89,13 @@ io_mapping_map_atomic_wc(struct io_mapping *mapping,
         BUG_ON(offset >= mapping->size);
         phys_addr = mapping->base + offset;
         pfn = (unsigned long) (phys_addr >> PAGE_SHIFT);
-        return iomap_atomic_prot_pfn(pfn, slot, mapping->prot);
+        return iomap_atomic_prot_pfn(pfn, mapping->prot);
 }
 
 static inline void
-io_mapping_unmap_atomic(void __iomem *vaddr, int slot)
+io_mapping_unmap_atomic(void __iomem *vaddr)
 {
-        iounmap_atomic(vaddr, slot);
+        iounmap_atomic(vaddr);
 }
 
 static inline void __iomem *
@@ -137,14 +136,13 @@ io_mapping_free(struct io_mapping *mapping)
 /* Atomic map/unmap */
 static inline void __iomem *
 io_mapping_map_atomic_wc(struct io_mapping *mapping,
-                         unsigned long offset,
-                         int slot)
+                         unsigned long offset)
 {
         return ((char __force __iomem *) mapping) + offset;
 }
 
 static inline void
-io_mapping_unmap_atomic(void __iomem *vaddr, int slot)
+io_mapping_unmap_atomic(void __iomem *vaddr)
 {
 }
 
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index edef168a0406..450092c1e35f 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -173,6 +173,11 @@ extern int _cond_resched(void);
                 (__x < 0) ? -__x : __x;         \
         })
 
+#define abs64(x) ({                             \
+                s64 __x = (x);                  \
+                (__x < 0) ? -__x : __x;         \
+        })
+
 #ifdef CONFIG_PROVE_LOCKING
 void might_fault(void);
 #else
@@ -203,10 +208,10 @@ extern unsigned long simple_strtoul(const char *,char **,unsigned int);
 extern long simple_strtol(const char *,char **,unsigned int);
 extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
 extern long long simple_strtoll(const char *,char **,unsigned int);
-extern int strict_strtoul(const char *, unsigned int, unsigned long *);
-extern int strict_strtol(const char *, unsigned int, long *);
-extern int strict_strtoull(const char *, unsigned int, unsigned long long *);
-extern int strict_strtoll(const char *, unsigned int, long long *);
+extern int __must_check strict_strtoul(const char *, unsigned int, unsigned long *);
+extern int __must_check strict_strtol(const char *, unsigned int, long *);
+extern int __must_check strict_strtoull(const char *, unsigned int, unsigned long long *);
+extern int __must_check strict_strtoll(const char *, unsigned int, long long *);
 extern int sprintf(char * buf, const char * fmt, ...)
         __attribute__ ((format (printf, 2, 3)));
 extern int vsprintf(char *buf, const char *, va_list)
@@ -277,6 +282,11 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 asmlinkage int printk(const char * fmt, ...)
         __attribute__ ((format (printf, 1, 2))) __cold;
 
+/*
+ * Please don't use printk_ratelimit(), because it shares ratelimiting state
+ * with all other unrelated printk_ratelimit() callsites.  Instead use
+ * printk_ratelimited() or plain old __ratelimit().
+ */
 extern int __printk_ratelimit(const char *func);
 #define printk_ratelimit() __printk_ratelimit(__func__)
 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
@@ -651,6 +661,24 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
         (void) (&_max1 == &_max2);              \
         _max1 > _max2 ? _max1 : _max2; })
 
+#define min3(x, y, z) ({                        \
+        typeof(x) _min1 = (x);                  \
+        typeof(y) _min2 = (y);                  \
+        typeof(z) _min3 = (z);                  \
+        (void) (&_min1 == &_min2);              \
+        (void) (&_min1 == &_min3);              \
+        _min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \
+                (_min2 < _min3 ? _min2 : _min3); })
+
+#define max3(x, y, z) ({                        \
+        typeof(x) _max1 = (x);                  \
+        typeof(y) _max2 = (y);                  \
+        typeof(z) _max3 = (z);                  \
+        (void) (&_max1 == &_max2);              \
+        (void) (&_max1 == &_max3);              \
+        _max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \
+                (_max2 > _max3 ? _max2 : _max3); })
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 62dbee554f60..c238ad2f82ea 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -171,11 +171,8 @@ struct kfifo_rec_ptr_2 __STRUCT_KFIFO_PTR(unsigned char, 2, void);
         }
 
 
-static inline unsigned int __must_check
-__kfifo_must_check_helper(unsigned int val)
-{
-        return val;
-}
+/* __kfifo_must_check_helper() is temporarily disabled because it was faulty */
+#define __kfifo_must_check_helper(x) (x)
 
 /**
  * kfifo_initialized - Check if the fifo is initialized
diff --git a/include/linux/math64.h b/include/linux/math64.h
index c87f1528703a..23fcdfcba81b 100644
--- a/include/linux/math64.h
+++ b/include/linux/math64.h
@@ -35,6 +35,14 @@ static inline u64 div64_u64(u64 dividend, u64 divisor)
         return dividend / divisor;
 }
 
+/**
+ * div64_s64 - signed 64bit divide with 64bit divisor
+ */
+static inline s64 div64_s64(s64 dividend, s64 divisor)
+{
+        return dividend / divisor;
+}
+
 #elif BITS_PER_LONG == 32
 
 #ifndef div_u64_rem
@@ -53,6 +61,10 @@ extern s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder);
 extern u64 div64_u64(u64 dividend, u64 divisor);
 #endif
 
+#ifndef div64_s64
+extern s64 div64_s64(s64 dividend, s64 divisor);
+#endif
+
 #endif /* BITS_PER_LONG */
 
 /**
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 864035fb8f8a..4307231bd22f 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -70,6 +70,10 @@ extern void online_page(struct page *page);
 extern int online_pages(unsigned long, unsigned long);
 extern void __offline_isolated_pages(unsigned long, unsigned long);
 
+#ifdef CONFIG_MEMORY_HOTREMOVE
+extern bool is_pageblock_removable_nolock(struct page *page);
+#endif /* CONFIG_MEMORY_HOTREMOVE */
+
 /* reasonably generic interface to expand the physical pages in a zone  */
 extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn,
         unsigned long nr_pages);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index a4c66846fb8f..721f451c3029 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -144,6 +144,7 @@ extern pgprot_t protection_map[16];
 #define FAULT_FLAG_WRITE        0x01    /* Fault was a write access */
 #define FAULT_FLAG_NONLINEAR    0x02    /* Fault was via a nonlinear mapping */
 #define FAULT_FLAG_MKWRITE      0x04    /* Fault was mkwrite of existing pte */
+#define FAULT_FLAG_ALLOW_RETRY  0x08    /* Retry fault if blocking */
 
 /*
  * This interface is used by x86 PAT code to identify a pfn mapping that is
@@ -497,8 +498,8 @@ static inline void set_compound_order(struct page *page, unsigned long order)
 #define NODES_PGSHIFT           (NODES_PGOFF * (NODES_WIDTH != 0))
 #define ZONES_PGSHIFT           (ZONES_PGOFF * (ZONES_WIDTH != 0))
 
-/* NODE:ZONE or SECTION:ZONE is used to ID a zone for the buddy allcator */
-#ifdef NODE_NOT_IN_PAGEFLAGS
+/* NODE:ZONE or SECTION:ZONE is used to ID a zone for the buddy allocator */
+#ifdef NODE_NOT_IN_PAGE_FLAGS
 #define ZONEID_SHIFT            (SECTIONS_SHIFT + ZONES_SHIFT)
 #define ZONEID_PGOFF            ((SECTIONS_PGOFF < ZONES_PGOFF)? \
                                                 SECTIONS_PGOFF : ZONES_PGOFF)
@@ -723,6 +724,7 @@ static inline int page_mapped(struct page *page)
 
 #define VM_FAULT_NOPAGE 0x0100  /* ->fault installed the pte, not return page */
 #define VM_FAULT_LOCKED 0x0200  /* ->fault locked the returned page */
+#define VM_FAULT_RETRY  0x0400  /* ->fault blocked, must retry */
 
 #define VM_FAULT_HWPOISON_LARGE_MASK 0xf000 /* encodes hpage index for large hwpoison */
 
@@ -868,6 +870,7 @@ int __set_page_dirty_no_writeback(struct page *page);
 int redirty_page_for_writepage(struct writeback_control *wbc,
                                 struct page *page);
 void account_page_dirtied(struct page *page, struct address_space *mapping);
+void account_page_writeback(struct page *page);
 int set_page_dirty(struct page *page);
 int set_page_dirty_lock(struct page *page);
 int clear_page_dirty_for_io(struct page *page);
@@ -1031,7 +1034,15 @@ extern void unregister_shrinker(struct shrinker *);
 
 int vma_wants_writenotify(struct vm_area_struct *vma);
 
-extern pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl);
+extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
+                               spinlock_t **ptl);
+static inline pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr,
+                                    spinlock_t **ptl)
+{
+        pte_t *ptep;
+        __cond_lock(*ptl, ptep = __get_locked_pte(mm, addr, ptl));
+        return ptep;
+}
 
 #ifdef __PAGETABLE_PUD_FOLDED
 static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index cb57d657ce4d..bb7288a782fd 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -310,6 +310,8 @@ struct mm_struct {
 #ifdef CONFIG_MMU_NOTIFIER
         struct mmu_notifier_mm *mmu_notifier_mm;
 #endif
+        /* How many tasks sharing this mm are OOM_DISABLE */
+        atomic_t oom_disable_count;
 };
 
 /* Future-safe accessor for struct mm_struct's cpu_vm_mask. */
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 3984c4eb41fd..39c24ebe9cfd 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -104,6 +104,8 @@ enum zone_stat_item {
         NR_ISOLATED_ANON,       /* Temporary isolated pages from anon lru */
         NR_ISOLATED_FILE,       /* Temporary isolated pages from file lru */
         NR_SHMEM,               /* shmem pages (included tmpfs/GEM pages) */
+        NR_DIRTIED,             /* page dirtyings since bootup */
+        NR_WRITTEN,             /* page writings since bootup */
 #ifdef CONFIG_NUMA
         NUMA_HIT,               /* allocated in intended node */
         NUMA_MISS,              /* allocated in non intended node */
@@ -421,6 +423,9 @@ struct zone {
 typedef enum {
         ZONE_RECLAIM_LOCKED,            /* prevents concurrent reclaim */
         ZONE_OOM_LOCKED,                /* zone is in OOM killer zonelist */
+        ZONE_CONGESTED,                 /* zone has many dirty pages backed by
+                                         * a congested BDI
+                                         */
 } zone_flags_t;
 
 static inline void zone_set_flag(struct zone *zone, zone_flags_t flag)
@@ -438,6 +443,11 @@ static inline void zone_clear_flag(struct zone *zone, zone_flags_t flag)
         clear_bit(flag, &zone->flags);
 }
 
+static inline int zone_is_reclaim_congested(const struct zone *zone)
+{
+        return test_bit(ZONE_CONGESTED, &zone->flags);
+}
+
 static inline int zone_is_reclaim_locked(const struct zone *zone)
 {
         return test_bit(ZONE_RECLAIM_LOCKED, &zone->flags);
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 9d2f1837b3d8..112adf8bd47d 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -21,8 +21,8 @@
 #define __module_cat(a,b) ___module_cat(a,b)
 #define __MODULE_INFO(tag, name, info)                                    \
 static const char __module_cat(name,__LINE__)[]                           \
-  __used                                                                  \
-  __attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
+  __used __attribute__((section(".modinfo"), unused, aligned(1)))         \
+  = __stringify(tag) "=" info
 #else  /* !MODULE */
 #define __MODULE_INFO(tag, name, info)
 #endif
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index e8c06122be36..19ef95d293ae 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -67,7 +67,8 @@ void set_pageblock_flags_group(struct page *page, unsigned long flags,
 
 #define get_pageblock_flags(page) \
                         get_pageblock_flags_group(page, 0, NR_PAGEBLOCK_BITS-1)
-#define set_pageblock_flags(page) \
-                        set_pageblock_flags_group(page, 0, NR_PAGEBLOCK_BITS-1)
+#define set_pageblock_flags(page, flags) \
+                        set_pageblock_flags_group(page, flags,  \
+                                                  0, NR_PAGEBLOCK_BITS-1)
 
 #endif  /* PAGEBLOCK_FLAGS_H */
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index e12cdc6d79ee..2d1ffe3cf1ee 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -299,6 +299,8 @@ static inline pgoff_t linear_page_index(struct vm_area_struct *vma,
 extern void __lock_page(struct page *page);
 extern int __lock_page_killable(struct page *page);
 extern void __lock_page_nosync(struct page *page);
+extern int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
+                                unsigned int flags);
 extern void unlock_page(struct page *page);
 
 static inline void __set_page_locked(struct page *page)
@@ -351,6 +353,17 @@ static inline void lock_page_nosync(struct page *page)
 }
         
 /*
+ * lock_page_or_retry - Lock the page, unless this would block and the
+ * caller indicated that it can handle a retry.
+ */
+static inline int lock_page_or_retry(struct page *page, struct mm_struct *mm,
+                                     unsigned int flags)
+{
+        might_sleep();
+        return trylock_page(page) || __lock_page_or_retry(page, mm, flags);
+}
+
+/*
  * This is exported only for wait_on_page_locked/wait_on_page_writeback.
  * Never use this directly!
  */
diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h
index 8f69d09a41a5..03ff67b0cdf5 100644
--- a/include/linux/ratelimit.h
+++ b/include/linux/ratelimit.h
@@ -36,6 +36,8 @@ static inline void ratelimit_state_init(struct ratelimit_state *rs,
         rs->begin = 0;
 }
 
+extern struct ratelimit_state printk_ratelimit_state;
+
 extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
 #define __ratelimit(state) ___ratelimit(state, __func__)
 
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 31b2fd75dcba..bb83c0da2071 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -25,8 +25,8 @@
  * pointing to this anon_vma once its vma list is empty.
  */
 struct anon_vma {
-        spinlock_t lock;        /* Serialize access to vma list */
         struct anon_vma *root;  /* Root of this anon_vma tree */
+        spinlock_t lock;        /* Serialize access to vma list */
 #if defined(CONFIG_KSM) || defined(CONFIG_MIGRATION)
 
         /*
@@ -205,9 +205,20 @@ int try_to_unmap_one(struct page *, struct vm_area_struct *,
 /*
  * Called from mm/filemap_xip.c to unmap empty zero page
  */
-pte_t *page_check_address(struct page *, struct mm_struct *,
+pte_t *__page_check_address(struct page *, struct mm_struct *,
                                 unsigned long, spinlock_t **, int);
 
+static inline pte_t *page_check_address(struct page *page, struct mm_struct *mm,
+                                        unsigned long address,
+                                        spinlock_t **ptlp, int sync)
+{
+        pte_t *ptep;
+
+        __cond_lock(*ptlp, ptep = __page_check_address(page, mm, address,
+                                                       ptlp, sync));
+        return ptep;
+}
+
 /*
  * Used by swapoff to help locate where page is expected in vma.
  */
@@ -230,7 +241,20 @@ int try_to_munlock(struct page *);
 /*
  * Called by memory-failure.c to kill processes.
  */
-struct anon_vma *page_lock_anon_vma(struct page *page);
+struct anon_vma *__page_lock_anon_vma(struct page *page);
+
+static inline struct anon_vma *page_lock_anon_vma(struct page *page)
+{
+        struct anon_vma *anon_vma;
+
+        __cond_lock(RCU, anon_vma = __page_lock_anon_vma(page));
+
+        /* (void) is needed to make gcc happy */
+        (void) __cond_lock(&anon_vma->root->lock, anon_vma);
+
+        return anon_vma;
+}
+
 void page_unlock_anon_vma(struct anon_vma *anon_vma);
 int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma);
 
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 56154bbb8da9..393ce94e54b7 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1706,7 +1706,6 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *
 #define PF_DUMPCORE     0x00000200      /* dumped core */
 #define PF_SIGNALED     0x00000400      /* killed by a signal */
 #define PF_MEMALLOC     0x00000800      /* Allocating memory */
-#define PF_FLUSHER      0x00001000      /* responsible for disk writeback */
 #define PF_USED_MATH    0x00002000      /* if unset the fpu must be initialized before use */
 #define PF_FREEZING     0x00004000      /* freeze in progress. do not account to load */
 #define PF_NOFREEZE     0x00008000      /* this thread should not be frozen */
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 7cdd63366f88..eba53e71d2cc 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -271,8 +271,18 @@ extern void scan_mapping_unevictable_pages(struct address_space *);
 extern unsigned long scan_unevictable_pages;
 extern int scan_unevictable_handler(struct ctl_table *, int,
                                         void __user *, size_t *, loff_t *);
+#ifdef CONFIG_NUMA
 extern int scan_unevictable_register_node(struct node *node);
 extern void scan_unevictable_unregister_node(struct node *node);
+#else
+static inline int scan_unevictable_register_node(struct node *node)
+{
+        return 0;
+}
+static inline void scan_unevictable_unregister_node(struct node *node)
+{
+}
+#endif
 
 extern int kswapd_run(int nid);
 extern void kswapd_stop(int nid);
diff --git a/include/linux/types.h b/include/linux/types.h
index 357dbc19606f..c2a9eb44f2fa 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -121,15 +121,7 @@ typedef		__u64		u_int64_t;
 typedef         __s64           int64_t;
 #endif
 
-/*
- * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid
- * common 32/64-bit compat problems.
- * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other
- * architectures) and to 8-byte boundaries on 64-bit architetures.  The new
- * aligned_64 type enforces 8-byte alignment so that structs containing
- * aligned_64 values have the same alignment on 32-bit and 64-bit architectures.
- * No conversions are necessary between 32-bit user-space and a 64-bit kernel.
- */
+/* this is a special 64bit data type that is 8-byte aligned */
 #define aligned_u64 __u64 __attribute__((aligned(8)))
 #define aligned_be64 __be64 __attribute__((aligned(8)))
 #define aligned_le64 __le64 __attribute__((aligned(8)))
@@ -186,7 +178,15 @@ typedef __u64 __bitwise __be64;
 typedef __u16 __bitwise __sum16;
 typedef __u32 __bitwise __wsum;
 
-/* this is a special 64bit data type that is 8-byte aligned */
+/*
+ * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid
+ * common 32/64-bit compat problems.
+ * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other
+ * architectures) and to 8-byte boundaries on 64-bit architetures.  The new
+ * aligned_64 type enforces 8-byte alignment so that structs containing
+ * aligned_64 values have the same alignment on 32-bit and 64-bit architectures.
+ * No conversions are necessary between 32-bit user-space and a 64-bit kernel.
+ */
 #define __aligned_u64 __u64 __attribute__((aligned(8)))
 #define __aligned_be64 __be64 __attribute__((aligned(8)))
 #define __aligned_le64 __le64 __attribute__((aligned(8)))
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 63a4fe6d51bd..a03dcf62ca9d 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -53,8 +53,10 @@ static inline void vmalloc_init(void)
 #endif
 
 extern void *vmalloc(unsigned long size);
+extern void *vzalloc(unsigned long size);
 extern void *vmalloc_user(unsigned long size);
 extern void *vmalloc_node(unsigned long size, int node);
+extern void *vzalloc_node(unsigned long size, int node);
 extern void *vmalloc_exec(unsigned long size);
 extern void *vmalloc_32(unsigned long size);
 extern void *vmalloc_32_user(unsigned long size);
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 070bb7a88936..0c0771f06bfa 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -190,7 +190,7 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
                 __INIT_WORK((_work), (_func), 0);               \
         } while (0)
 
-#define INIT_WORK_ON_STACK(_work, _func)                        \
+#define INIT_WORK_ONSTACK(_work, _func)                         \
         do {                                                    \
                 __INIT_WORK((_work), (_func), 1);               \
         } while (0)
@@ -201,9 +201,9 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
                 init_timer(&(_work)->timer);                    \
         } while (0)
 
-#define INIT_DELAYED_WORK_ON_STACK(_work, _func)                \
+#define INIT_DELAYED_WORK_ONSTACK(_work, _func)                 \
         do {                                                    \
-                INIT_WORK_ON_STACK(&(_work)->work, (_func));    \
+                INIT_WORK_ONSTACK(&(_work)->work, (_func));     \
                 init_timer_on_stack(&(_work)->timer);           \
         } while (0)
 
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 72a5d647a5f2..c7299d2ace6b 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -149,6 +149,8 @@ int write_cache_pages(struct address_space *mapping,
 int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
 void set_page_dirty_balance(struct page *page, int page_mkwrite);
 void writeback_set_ratelimit(void);
+void tag_pages_for_writeback(struct address_space *mapping,
+                             pgoff_t start, pgoff_t end);
 
 /* pdflush.c */
 extern int nr_pdflush_threads;  /* Global so it can be exported to sysctl
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 01e9e0076a92..6bcb00645de4 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -242,18 +242,20 @@ TRACE_EVENT(ext4_da_writepages,
                 __entry->pages_skipped  = wbc->pages_skipped;
                 __entry->range_start    = wbc->range_start;
                 __entry->range_end      = wbc->range_end;
-                __entry->nonblocking    = wbc->nonblocking;
                 __entry->for_kupdate    = wbc->for_kupdate;
                 __entry->for_reclaim    = wbc->for_reclaim;
                 __entry->range_cyclic   = wbc->range_cyclic;
                 __entry->writeback_index = inode->i_mapping->writeback_index;
         ),
 
-        TP_printk("dev %s ino %lu nr_to_write %ld pages_skipped %ld range_start %llu range_end %llu nonblocking %d for_kupdate %d for_reclaim %d range_cyclic %d writeback_index %lu",
+        TP_printk("dev %s ino %lu nr_to_write %ld pages_skipped %ld "
+                  "range_start %llu range_end %llu "
+                  "for_kupdate %d for_reclaim %d "
+                  "range_cyclic %d writeback_index %lu",
                   jbd2_dev_to_name(__entry->dev),
                   (unsigned long) __entry->ino, __entry->nr_to_write,
                   __entry->pages_skipped, __entry->range_start,
-                  __entry->range_end, __entry->nonblocking,
+                  __entry->range_end,
                   __entry->for_kupdate, __entry->for_reclaim,
                   __entry->range_cyclic,
                   (unsigned long) __entry->writeback_index)
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index 370aa5a87322..c255fcc587bf 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -10,6 +10,7 @@
 
 #define RECLAIM_WB_ANON         0x0001u
 #define RECLAIM_WB_FILE         0x0002u
+#define RECLAIM_WB_MIXED        0x0010u
 #define RECLAIM_WB_SYNC         0x0004u
 #define RECLAIM_WB_ASYNC        0x0008u
 
@@ -17,13 +18,20 @@
         (flags) ? __print_flags(flags, "|",                     \
                 {RECLAIM_WB_ANON,       "RECLAIM_WB_ANON"},     \
                 {RECLAIM_WB_FILE,       "RECLAIM_WB_FILE"},     \
+                {RECLAIM_WB_MIXED,      "RECLAIM_WB_MIXED"},    \
                 {RECLAIM_WB_SYNC,       "RECLAIM_WB_SYNC"},     \
                 {RECLAIM_WB_ASYNC,      "RECLAIM_WB_ASYNC"}     \
                 ) : "RECLAIM_WB_NONE"
 
 #define trace_reclaim_flags(page, sync) ( \
         (page_is_file_cache(page) ? RECLAIM_WB_FILE : RECLAIM_WB_ANON) | \
-        (sync == PAGEOUT_IO_SYNC ? RECLAIM_WB_SYNC : RECLAIM_WB_ASYNC)   \
+        (sync == LUMPY_MODE_SYNC ? RECLAIM_WB_SYNC : RECLAIM_WB_ASYNC)   \
+        )
+
+#define trace_shrink_flags(file, sync) ( \
+        (sync == LUMPY_MODE_SYNC ? RECLAIM_WB_MIXED : \
+                        (file ? RECLAIM_WB_FILE : RECLAIM_WB_ANON)) |  \
+        (sync == LUMPY_MODE_SYNC ? RECLAIM_WB_SYNC : RECLAIM_WB_ASYNC) \
         )
 
 TRACE_EVENT(mm_vmscan_kswapd_sleep,
@@ -269,6 +277,40 @@ TRACE_EVENT(mm_vmscan_writepage,
                 show_reclaim_flags(__entry->reclaim_flags))
 );
 
+TRACE_EVENT(mm_vmscan_lru_shrink_inactive,
+
+        TP_PROTO(int nid, int zid,
+                        unsigned long nr_scanned, unsigned long nr_reclaimed,
+                        int priority, int reclaim_flags),
+
+        TP_ARGS(nid, zid, nr_scanned, nr_reclaimed, priority, reclaim_flags),
+
+        TP_STRUCT__entry(
+                __field(int, nid)
+                __field(int, zid)
+                __field(unsigned long, nr_scanned)
+                __field(unsigned long, nr_reclaimed)
+                __field(int, priority)
+                __field(int, reclaim_flags)
+        ),
+
+        TP_fast_assign(
+                __entry->nid = nid;
+                __entry->zid = zid;
+                __entry->nr_scanned = nr_scanned;
+                __entry->nr_reclaimed = nr_reclaimed;
+                __entry->priority = priority;
+                __entry->reclaim_flags = reclaim_flags;
+        ),
+
+        TP_printk("nid=%d zid=%d nr_scanned=%ld nr_reclaimed=%ld priority=%d flags=%s",
+                __entry->nid, __entry->zid,
+                __entry->nr_scanned, __entry->nr_reclaimed,
+                __entry->priority,
+                show_reclaim_flags(__entry->reclaim_flags))
+);
+
+
 #endif /* _TRACE_VMSCAN_H */
 
 /* This part must be outside protection */
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index f345f66ae9d1..89a2b2db4375 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -96,8 +96,6 @@ DECLARE_EVENT_CLASS(wbc_class,
                 __field(long, nr_to_write)
                 __field(long, pages_skipped)
                 __field(int, sync_mode)
-                __field(int, nonblocking)
-                __field(int, encountered_congestion)
                 __field(int, for_kupdate)
                 __field(int, for_background)
                 __field(int, for_reclaim)
@@ -153,6 +151,41 @@ DEFINE_WBC_EVENT(wbc_balance_dirty_written);
 DEFINE_WBC_EVENT(wbc_balance_dirty_wait);
 DEFINE_WBC_EVENT(wbc_writepage);
 
+DECLARE_EVENT_CLASS(writeback_congest_waited_template,
+
+        TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
+
+        TP_ARGS(usec_timeout, usec_delayed),
+
+        TP_STRUCT__entry(
+                __field(        unsigned int,   usec_timeout    )
+                __field(        unsigned int,   usec_delayed    )
+        ),
+
+        TP_fast_assign(
+                __entry->usec_timeout   = usec_timeout;
+                __entry->usec_delayed   = usec_delayed;
+        ),
+
+        TP_printk("usec_timeout=%u usec_delayed=%u",
+                        __entry->usec_timeout,
+                        __entry->usec_delayed)
+);
+
+DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait,
+
+        TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
+
+        TP_ARGS(usec_timeout, usec_delayed)
+);
+
+DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested,
+
+        TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
+
+        TP_ARGS(usec_timeout, usec_delayed)
+);
+
 #endif /* _TRACE_WRITEBACK_H */
 
 /* This part must be outside protection */
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 62a47eafa8e9..830aaec9c7d5 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -291,7 +291,7 @@ static int __init do_mount_root(char *name, char *fs, int flags, void *data)
         if (err)
                 return err;
 
-        sys_chdir("/root");
+        sys_chdir((const char __user __force *)"/root");
         ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
         printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n",
                current->fs->pwd.mnt->mnt_sb->s_type->name,
@@ -488,5 +488,5 @@ void __init prepare_namespace(void)
 out:
         devtmpfs_mount("dev");
         sys_mount(".", "/", NULL, MS_MOVE, NULL);
-        sys_chroot(".");
+        sys_chroot((const char __user __force *)".");
 }
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index 69aebbf8fd2d..32c4799b8c91 100644
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -283,7 +283,7 @@ static void __init autodetect_raid(void)
 
         wait_for_device_probe();
 
-        fd = sys_open("/dev/md0", 0, 0);
+        fd = sys_open((const char __user __force *) "/dev/md0", 0, 0);
         if (fd >= 0) {
                 sys_ioctl(fd, RAID_AUTORUN, raid_autopart);
                 sys_close(fd);
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index bf3ef667bf36..6e1ee6987c78 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -168,7 +168,7 @@ int __init rd_load_image(char *from)
         char rotator[4] = { '|' , '/' , '-' , '\\' };
 #endif
 
-        out_fd = sys_open("/dev/ram", O_RDWR, 0);
+        out_fd = sys_open((const char __user __force *) "/dev/ram", O_RDWR, 0);
         if (out_fd < 0)
                 goto out;
 
@@ -267,7 +267,7 @@ noclose_input:
         sys_close(out_fd);
 out:
         kfree(buf);
-        sys_unlink("/dev/ram");
+        sys_unlink((const char __user __force *) "/dev/ram");
         return res;
 }
 
diff --git a/init/initramfs.c b/init/initramfs.c
index 4b9c20205092..d9c6e782ff53 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -528,7 +528,7 @@ static void __init clean_rootfs(void)
         struct linux_dirent64 *dirp;
         int num;
 
-        fd = sys_open("/", O_RDONLY, 0);
+        fd = sys_open((const char __user __force *) "/", O_RDONLY, 0);
         WARN_ON(fd < 0);
         if (fd < 0)
                 return;
@@ -590,7 +590,8 @@ static int __init populate_rootfs(void)
                 }
                 printk(KERN_INFO "rootfs image is not initramfs (%s)"
                                 "; looks like an initrd\n", err);
-                fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 0700);
+                fd = sys_open((const char __user __force *) "/initrd.image",
+                              O_WRONLY|O_CREAT, 0700);
                 if (fd >= 0) {
                         sys_write(fd, (char *)initrd_start,
                                         initrd_end - initrd_start);
diff --git a/init/noinitramfs.c b/init/noinitramfs.c
index f4c1a3a1b8c5..267739d85179 100644
--- a/init/noinitramfs.c
+++ b/init/noinitramfs.c
@@ -29,17 +29,17 @@ static int __init default_rootfs(void)
 {
         int err;
 
-        err = sys_mkdir("/dev", 0755);
+        err = sys_mkdir((const char __user __force *) "/dev", 0755);
         if (err < 0)
                 goto out;
 
-        err = sys_mknod((const char __user *) "/dev/console",
+        err = sys_mknod((const char __user __force *) "/dev/console",
                         S_IFCHR | S_IRUSR | S_IWUSR,
                         new_encode_dev(MKDEV(5, 1)));
         if (err < 0)
                 goto out;
 
-        err = sys_mkdir("/root", 0700);
+        err = sys_mkdir((const char __user __force *) "/root", 0700);
         if (err < 0)
                 goto out;
 
diff --git a/kernel/exit.c b/kernel/exit.c
index e2bdf37f9fde..894179a32ec1 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -50,6 +50,7 @@
 #include <linux/perf_event.h>
 #include <trace/events/sched.h>
 #include <linux/hw_breakpoint.h>
+#include <linux/oom.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -687,6 +688,8 @@ static void exit_mm(struct task_struct * tsk)
         enter_lazy_tlb(mm, current);
         /* We don't want this task to be frozen prematurely */
         clear_freeze_flag(tsk);
+        if (tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+                atomic_dec(&mm->oom_disable_count);
         task_unlock(tsk);
         mm_update_next_owner(mm);
         mmput(mm);
diff --git a/kernel/fork.c b/kernel/fork.c
index c445f8cc408d..e87aaaaf5131 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -65,6 +65,7 @@
 #include <linux/perf_event.h>
 #include <linux/posix-timers.h>
 #include <linux/user-return-notifier.h>
+#include <linux/oom.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -488,6 +489,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
         mm->cached_hole_size = ~0UL;
         mm_init_aio(mm);
         mm_init_owner(mm, p);
+        atomic_set(&mm->oom_disable_count, 0);
 
         if (likely(!mm_alloc_pgd(mm))) {
                 mm->def_flags = 0;
@@ -741,6 +743,8 @@ good_mm:
         /* Initializing for Swap token stuff */
         mm->token_priority = 0;
         mm->last_interval = 0;
+        if (tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+                atomic_inc(&mm->oom_disable_count);
 
         tsk->mm = mm;
         tsk->active_mm = mm;
@@ -1299,8 +1303,13 @@ bad_fork_cleanup_io:
 bad_fork_cleanup_namespaces:
         exit_task_namespaces(p);
 bad_fork_cleanup_mm:
-        if (p->mm)
+        if (p->mm) {
+                task_lock(p);
+                if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+                        atomic_dec(&p->mm->oom_disable_count);
+                task_unlock(p);
                 mmput(p->mm);
+        }
 bad_fork_cleanup_signal:
         if (!(clone_flags & CLONE_THREAD))
                 free_signal_struct(p->signal);
@@ -1693,6 +1702,10 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
                         active_mm = current->active_mm;
                         current->mm = new_mm;
                         current->active_mm = new_mm;
+                        if (current->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) {
+                                atomic_dec(&mm->oom_disable_count);
+                                atomic_inc(&new_mm->oom_disable_count);
+                        }
                         activate_mm(active_mm, new_mm);
                         new_mm = mm;
                 }
diff --git a/kernel/kexec.c b/kernel/kexec.c
index c0613f7d6730..b55045bc7563 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -816,7 +816,7 @@ static int kimage_load_normal_segment(struct kimage *image,
 
                 ptr = kmap(page);
                 /* Start with a clear page */
-                memset(ptr, 0, PAGE_SIZE);
+                clear_page(ptr);
                 ptr += maddr & ~PAGE_MASK;
                 mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK);
                 if (mchunk > mbytes)
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index ac7eb109f196..0dac75ea4456 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -984,8 +984,8 @@ static void copy_data_page(unsigned long dst_pfn, unsigned long src_pfn)
                 src = kmap_atomic(s_page, KM_USER0);
                 dst = kmap_atomic(d_page, KM_USER1);
                 do_copy_page(dst, src);
-                kunmap_atomic(src, KM_USER0);
                 kunmap_atomic(dst, KM_USER1);
+                kunmap_atomic(src, KM_USER0);
         } else {
                 if (PageHighMem(d_page)) {
                         /* Page pointed to by src may contain some kernel
@@ -993,7 +993,7 @@ static void copy_data_page(unsigned long dst_pfn, unsigned long src_pfn)
                          */
                         safe_copy_page(buffer, s_page);
                         dst = kmap_atomic(d_page, KM_USER0);
-                        memcpy(dst, buffer, PAGE_SIZE);
+                        copy_page(dst, buffer);
                         kunmap_atomic(dst, KM_USER0);
                 } else {
                         safe_copy_page(page_address(d_page), s_page);
@@ -1687,7 +1687,7 @@ int snapshot_read_next(struct snapshot_handle *handle)
                 memory_bm_position_reset(&orig_bm);
                 memory_bm_position_reset(&copy_bm);
         } else if (handle->cur <= nr_meta_pages) {
-                memset(buffer, 0, PAGE_SIZE);
+                clear_page(buffer);
                 pack_pfns(buffer, &orig_bm);
         } else {
                 struct page *page;
@@ -1701,7 +1701,7 @@ int snapshot_read_next(struct snapshot_handle *handle)
                         void *kaddr;
 
                         kaddr = kmap_atomic(page, KM_USER0);
-                        memcpy(buffer, kaddr, PAGE_SIZE);
+                        copy_page(buffer, kaddr);
                         kunmap_atomic(kaddr, KM_USER0);
                         handle->buffer = buffer;
                 } else {
@@ -1984,7 +1984,7 @@ static void copy_last_highmem_page(void)
                 void *dst;
 
                 dst = kmap_atomic(last_highmem_page, KM_USER0);
-                memcpy(dst, buffer, PAGE_SIZE);
+                copy_page(dst, buffer);
                 kunmap_atomic(dst, KM_USER0);
                 last_highmem_page = NULL;
         }
@@ -2270,11 +2270,11 @@ swap_two_pages_data(struct page *p1, struct page *p2, void *buf)
 
         kaddr1 = kmap_atomic(p1, KM_USER0);
         kaddr2 = kmap_atomic(p2, KM_USER1);
-        memcpy(buf, kaddr1, PAGE_SIZE);
-        memcpy(kaddr1, kaddr2, PAGE_SIZE);
-        memcpy(kaddr2, buf, PAGE_SIZE);
-        kunmap_atomic(kaddr1, KM_USER0);
+        copy_page(buf, kaddr1);
+        copy_page(kaddr1, kaddr2);
+        copy_page(kaddr2, buf);
         kunmap_atomic(kaddr2, KM_USER1);
+        kunmap_atomic(kaddr1, KM_USER0);
 }
 
 /**
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 916eaa790399..a0e4a86ccf94 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -251,7 +251,7 @@ static int write_page(void *buf, sector_t offset, struct bio **bio_chain)
         if (bio_chain) {
                 src = (void *)__get_free_page(__GFP_WAIT | __GFP_HIGH);
                 if (src) {
-                        memcpy(src, buf, PAGE_SIZE);
+                        copy_page(src, buf);
                 } else {
                         WARN_ON_ONCE(1);
                         bio_chain = NULL;       /* Go synchronous */
@@ -325,7 +325,7 @@ static int swap_write_page(struct swap_map_handle *handle, void *buf,
                 error = write_page(handle->cur, handle->cur_swap, NULL);
                 if (error)
                         goto out;
-                memset(handle->cur, 0, PAGE_SIZE);
+                clear_page(handle->cur);
                 handle->cur_swap = offset;
                 handle->k = 0;
         }
@@ -910,7 +910,7 @@ int swsusp_check(void)
         hib_resume_bdev = open_by_devnum(swsusp_resume_device, FMODE_READ);
         if (!IS_ERR(hib_resume_bdev)) {
                 set_blocksize(hib_resume_bdev, PAGE_SIZE);
-                memset(swsusp_header, 0, PAGE_SIZE);
+                clear_page(swsusp_header);
                 error = hib_bio_read_page(swsusp_resume_block,
                                         swsusp_header, NULL);
                 if (error)
diff --git a/kernel/printk.c b/kernel/printk.c
index 2531017795f6..b2ebaee8c377 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -210,7 +210,7 @@ __setup("log_buf_len=", log_buf_len_setup);
 
 #ifdef CONFIG_BOOT_PRINTK_DELAY
 
-static unsigned int boot_delay; /* msecs delay after each printk during bootup */
+static int boot_delay; /* msecs delay after each printk during bootup */
 static unsigned long long loops_per_msec;       /* based on boot_delay */
 
 static int __init boot_delay_setup(char *str)
@@ -647,6 +647,7 @@ static inline int can_use_console(unsigned int cpu)
  * released but interrupts still disabled.
  */
 static int acquire_console_semaphore_for_printk(unsigned int cpu)
+        __releases(&logbuf_lock)
 {
         int retval = 0;
 
@@ -1511,7 +1512,7 @@ int kmsg_dump_unregister(struct kmsg_dumper *dumper)
 }
 EXPORT_SYMBOL_GPL(kmsg_dump_unregister);
 
-static const char const *kmsg_reasons[] = {
+static const char * const kmsg_reasons[] = {
         [KMSG_DUMP_OOPS]        = "oops",
         [KMSG_DUMP_PANIC]       = "panic",
         [KMSG_DUMP_KEXEC]       = "kexec",
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 090c28812ce1..2df820b03beb 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -262,7 +262,7 @@ repeat:
                 cpu_stop_fn_t fn = work->fn;
                 void *arg = work->arg;
                 struct cpu_stop_done *done = work->done;
-                char ksym_buf[KSYM_NAME_LEN];
+                char ksym_buf[KSYM_NAME_LEN] __maybe_unused;
 
                 __set_current_state(TASK_RUNNING);
 
@@ -304,7 +304,7 @@ static int __cpuinit cpu_stop_cpu_callback(struct notifier_block *nfb,
                 p = kthread_create(cpu_stopper_thread, stopper, "migration/%d",
                                    cpu);
                 if (IS_ERR(p))
-                        return NOTIFY_BAD;
+                        return notifier_from_errno(PTR_ERR(p));
                 get_task_struct(p);
                 kthread_bind(p, cpu);
                 sched_set_stop_task(cpu, p);
@@ -372,7 +372,7 @@ static int __init cpu_stop_init(void)
         /* start one for the boot cpu */
         err = cpu_stop_cpu_callback(&cpu_stop_cpu_notifier, CPU_UP_PREPARE,
                                     bcpu);
-        BUG_ON(err == NOTIFY_BAD);
+        BUG_ON(err != NOTIFY_OK);
         cpu_stop_cpu_callback(&cpu_stop_cpu_notifier, CPU_ONLINE, bcpu);
         register_cpu_notifier(&cpu_stop_cpu_notifier);
 
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3a45c224770f..48d9d689498f 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -161,8 +161,6 @@ extern int no_unaligned_warning;
 extern int unaligned_dump_stack;
 #endif
 
-extern struct ratelimit_state printk_ratelimit_state;
-
 #ifdef CONFIG_PROC_SYSCTL
 static int proc_do_cad_pid(struct ctl_table *table, int write,
                   void __user *buffer, size_t *lenp, loff_t *ppos);
@@ -1352,16 +1350,16 @@ static struct ctl_table fs_table[] = {
         {
                 .procname       = "file-nr",
                 .data           = &files_stat,
-                .maxlen         = 3*sizeof(int),
+                .maxlen         = sizeof(files_stat),
                 .mode           = 0444,
                 .proc_handler   = proc_nr_files,
         },
         {
                 .procname       = "file-max",
                 .data           = &files_stat.max_files,
-                .maxlen         = sizeof(int),
+                .maxlen         = sizeof(files_stat.max_files),
                 .mode           = 0644,
-                .proc_handler   = proc_dointvec,
+                .proc_handler   = proc_doulongvec_minmax,
         },
         {
                 .procname       = "nr_open",
diff --git a/kernel/user.c b/kernel/user.c
index 7e72614b736d..2c7d8d5914b1 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -91,6 +91,7 @@ static struct user_struct *uid_hash_find(uid_t uid, struct hlist_head *hashent)
  * upon function exit.
  */
 static void free_user(struct user_struct *up, unsigned long flags)
+        __releases(&uidhash_lock)
 {
         uid_hash_remove(up);
         spin_unlock_irqrestore(&uidhash_lock, flags);
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index e5ff2cbaadc2..90db1bd1a978 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2064,7 +2064,7 @@ static void insert_wq_barrier(struct cpu_workqueue_struct *cwq,
          * checks and call back into the fixup functions where we
          * might deadlock.
          */
-        INIT_WORK_ON_STACK(&barr->work, wq_barrier_func);
+        INIT_WORK_ONSTACK(&barr->work, wq_barrier_func);
         __set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(&barr->work));
         init_completion(&barr->done);
 
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 69a32664c289..95bda87a3e84 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -317,6 +317,14 @@ config DEBUG_OBJECTS_RCU_HEAD
         help
           Enable this to turn on debugging of RCU list heads (call_rcu() usage).
 
+config DEBUG_OBJECTS_PERCPU_COUNTER
+        bool "Debug percpu counter objects"
+        depends on DEBUG_OBJECTS
+        help
+          If you say Y here, additional code will be inserted into the
+          percpu counter routines to track the life time of percpu counter
+          objects and validate the percpu counter operations.
+
 config DEBUG_OBJECTS_ENABLE_DEFAULT
         int "debug_objects bootup default value (0-1)"
         range 0 1
@@ -740,6 +748,15 @@ config DEBUG_LIST
 
           If unsure, say N.
 
+config TEST_LIST_SORT
+        bool "Linked list sorting test"
+        depends on DEBUG_KERNEL
+        help
+          Enable this to turn on 'list_sort()' function test. This test is
+          executed only once during system boot, so affects only boot time.
+
+          If unsure, say N.
+
 config DEBUG_SG
         bool "Debug SG table operations"
         depends on DEBUG_KERNEL
diff --git a/lib/bitmap.c b/lib/bitmap.c
index ffb78c916ccd..741fae905ae3 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -359,7 +359,6 @@ EXPORT_SYMBOL(bitmap_find_next_zero_area);
 
 #define CHUNKSZ                         32
 #define nbits_to_hold_value(val)        fls(val)
-#define unhex(c)                        (isdigit(c) ? (c - '0') : (toupper(c) - 'A' + 10))
 #define BASEDEC 10              /* fancier cpuset lists input in decimal */
 
 /**
@@ -466,7 +465,7 @@ int __bitmap_parse(const char *buf, unsigned int buflen,
                         if (chunk & ~((1UL << (CHUNKSZ - 4)) - 1))
                                 return -EOVERFLOW;
 
-                        chunk = (chunk << 4) | unhex(c);
+                        chunk = (chunk << 4) | hex_to_bin(c);
                         ndigits++; totaldigits++;
                 }
                 if (ndigits == 0)
diff --git a/lib/div64.c b/lib/div64.c
index a111eb8de9cf..5b4919191778 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -77,26 +77,58 @@ s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder)
 EXPORT_SYMBOL(div_s64_rem);
 #endif
 
-/* 64bit divisor, dividend and result. dynamic precision */
+/**
+ * div64_u64 - unsigned 64bit divide with 64bit divisor
+ * @dividend:   64bit dividend
+ * @divisor:    64bit divisor
+ *
+ * This implementation is a modified version of the algorithm proposed
+ * by the book 'Hacker's Delight'.  The original source and full proof
+ * can be found here and is available for use without restriction.
+ *
+ * 'http://www.hackersdelight.org/HDcode/newCode/divDouble.c'
+ */
 #ifndef div64_u64
 u64 div64_u64(u64 dividend, u64 divisor)
 {
-        u32 high, d;
+        u32 high = divisor >> 32;
+        u64 quot;
 
-        high = divisor >> 32;
-        if (high) {
-                unsigned int shift = fls(high);
+        if (high == 0) {
+                quot = div_u64(dividend, divisor);
+        } else {
+                int n = 1 + fls(high);
+                quot = div_u64(dividend >> n, divisor >> n);
 
-                d = divisor >> shift;
-                dividend >>= shift;
-        } else
-                d = divisor;
+                if (quot != 0)
+                        quot--;
+                if ((dividend - quot * divisor) >= divisor)
+                        quot++;
+        }
 
-        return div_u64(dividend, d);
+        return quot;
 }
 EXPORT_SYMBOL(div64_u64);
 #endif
 
+/**
+ * div64_s64 - signed 64bit divide with 64bit divisor
+ * @dividend:   64bit dividend
+ * @divisor:    64bit divisor
+ */
+#ifndef div64_s64
+s64 div64_s64(s64 dividend, s64 divisor)
+{
+        s64 quot, t;
+
+        quot = div64_u64(abs64(dividend), abs64(divisor));
+        t = (dividend ^ divisor) >> 63;
+
+        return (quot ^ t) - t;
+}
+EXPORT_SYMBOL(div64_s64);
+#endif
+
 #endif /* BITS_PER_LONG == 32 */
 
 /*
diff --git a/lib/idr.c b/lib/idr.c
index 5e0966be0f7c..e35850d3004a 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -110,9 +110,10 @@ static void idr_mark_full(struct idr_layer **pa, int id)
  * @idp:        idr handle
  * @gfp_mask:   memory allocation flags
  *
- * This function should be called prior to locking and calling the
- * idr_get_new* functions. It preallocates enough memory to satisfy
- * the worst possible allocation.
+ * This function should be called prior to calling the idr_get_new* functions.
+ * It preallocates enough memory to satisfy the worst possible allocation. The
+ * caller should pass in GFP_KERNEL if possible.  This of course requires that
+ * no spinning locks be held.
  *
  * If the system is REALLY out of memory this function returns 0,
  * otherwise 1.
@@ -290,9 +291,11 @@ static int idr_get_new_above_int(struct idr *idp, void *ptr, int starting_id)
  * This is the allocate id function.  It should be called with any
  * required locks.
  *
- * If memory is required, it will return -EAGAIN, you should unlock
- * and go back to the idr_pre_get() call.  If the idr is full, it will
- * return -ENOSPC.
+ * If allocation from IDR's private freelist fails, idr_get_new_above() will
+ * return -EAGAIN.  The caller should retry the idr_pre_get() call to refill
+ * IDR's preallocation and then retry the idr_get_new_above() call.
+ *
+ * If the idr is full idr_get_new_above() will return -ENOSPC.
  *
  * @id returns a value in the range @starting_id ... 0x7fffffff
  */
@@ -318,12 +321,11 @@ EXPORT_SYMBOL(idr_get_new_above);
  * @ptr: pointer you want associated with the id
  * @id: pointer to the allocated handle
  *
- * This is the allocate id function.  It should be called with any
- * required locks.
+ * If allocation from IDR's private freelist fails, idr_get_new_above() will
+ * return -EAGAIN.  The caller should retry the idr_pre_get() call to refill
+ * IDR's preallocation and then retry the idr_get_new_above() call.
  *
- * If memory is required, it will return -EAGAIN, you should unlock
- * and go back to the idr_pre_get() call.  If the idr is full, it will
- * return -ENOSPC.
+ * If the idr is full idr_get_new_above() will return -ENOSPC.
  *
  * @id returns a value in the range 0 ... 0x7fffffff
  */
diff --git a/lib/list_sort.c b/lib/list_sort.c
index a7616fa3162e..d7325c6b103f 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -141,77 +141,151 @@ void list_sort(void *priv, struct list_head *head,
 }
 EXPORT_SYMBOL(list_sort);
 
-#ifdef DEBUG_LIST_SORT
+#ifdef CONFIG_TEST_LIST_SORT
+
+#include <linux/random.h>
+
+/*
+ * The pattern of set bits in the list length determines which cases
+ * are hit in list_sort().
+ */
+#define TEST_LIST_LEN (512+128+2) /* not including head */
+
+#define TEST_POISON1 0xDEADBEEF
+#define TEST_POISON2 0xA324354C
+
 struct debug_el {
-        struct list_head l_h;
+        unsigned int poison1;
+        struct list_head list;
+        unsigned int poison2;
         int value;
         unsigned serial;
 };
 
-static int cmp(void *priv, struct list_head *a, struct list_head *b)
+/* Array, containing pointers to all elements in the test list */
+static struct debug_el **elts __initdata;
+
+static int __init check(struct debug_el *ela, struct debug_el *elb)
 {
-        return container_of(a, struct debug_el, l_h)->value
-             - container_of(b, struct debug_el, l_h)->value;
+        if (ela->serial >= TEST_LIST_LEN) {
+                printk(KERN_ERR "list_sort_test: error: incorrect serial %d\n",
+                                ela->serial);
+                return -EINVAL;
+        }
+        if (elb->serial >= TEST_LIST_LEN) {
+                printk(KERN_ERR "list_sort_test: error: incorrect serial %d\n",
+                                elb->serial);
+                return -EINVAL;
+        }
+        if (elts[ela->serial] != ela || elts[elb->serial] != elb) {
+                printk(KERN_ERR "list_sort_test: error: phantom element\n");
+                return -EINVAL;
+        }
+        if (ela->poison1 != TEST_POISON1 || ela->poison2 != TEST_POISON2) {
+                printk(KERN_ERR "list_sort_test: error: bad poison: %#x/%#x\n",
+                                ela->poison1, ela->poison2);
+                return -EINVAL;
+        }
+        if (elb->poison1 != TEST_POISON1 || elb->poison2 != TEST_POISON2) {
+                printk(KERN_ERR "list_sort_test: error: bad poison: %#x/%#x\n",
+                                elb->poison1, elb->poison2);
+                return -EINVAL;
+        }
+        return 0;
 }
 
-/*
- * The pattern of set bits in the list length determines which cases
- * are hit in list_sort().
- */
-#define LIST_SORT_TEST_LENGTH (512+128+2) /* not including head */
+static int __init cmp(void *priv, struct list_head *a, struct list_head *b)
+{
+        struct debug_el *ela, *elb;
+
+        ela = container_of(a, struct debug_el, list);
+        elb = container_of(b, struct debug_el, list);
+
+        check(ela, elb);
+        return ela->value - elb->value;
+}
 
 static int __init list_sort_test(void)
 {
-        int i, r = 1, count;
-        struct list_head *head = kmalloc(sizeof(*head), GFP_KERNEL);
-        struct list_head *cur;
+        int i, count = 1, err = -EINVAL;
+        struct debug_el *el;
+        struct list_head *cur, *tmp;
+        LIST_HEAD(head);
+
+        printk(KERN_DEBUG "list_sort_test: start testing list_sort()\n");
 
-        printk(KERN_WARNING "testing list_sort()\n");
+        elts = kmalloc(sizeof(void *) * TEST_LIST_LEN, GFP_KERNEL);
+        if (!elts) {
+                printk(KERN_ERR "list_sort_test: error: cannot allocate "
+                                "memory\n");
+                goto exit;
+        }
 
-        cur = head;
-        for (i = 0; i < LIST_SORT_TEST_LENGTH; i++) {
-                struct debug_el *el = kmalloc(sizeof(*el), GFP_KERNEL);
-                BUG_ON(!el);
+        for (i = 0; i < TEST_LIST_LEN; i++) {
+                el = kmalloc(sizeof(*el), GFP_KERNEL);
+                if (!el) {
+                        printk(KERN_ERR "list_sort_test: error: cannot "
+                                        "allocate memory\n");
+                        goto exit;
+                }
                  /* force some equivalencies */
-                el->value = (r = (r * 725861) % 6599) % (LIST_SORT_TEST_LENGTH/3);
+                el->value = random32() % (TEST_LIST_LEN/3);
                 el->serial = i;
-
-                el->l_h.prev = cur;
-                cur->next = &el->l_h;
-                cur = cur->next;
+                el->poison1 = TEST_POISON1;
+                el->poison2 = TEST_POISON2;
+                elts[i] = el;
+                list_add_tail(&el->list, &head);
         }
-        head->prev = cur;
 
-        list_sort(NULL, head, cmp);
+        list_sort(NULL, &head, cmp);
+
+        for (cur = head.next; cur->next != &head; cur = cur->next) {
+                struct debug_el *el1;
+                int cmp_result;
 
-        count = 1;
-        for (cur = head->next; cur->next != head; cur = cur->next) {
-                struct debug_el *el = container_of(cur, struct debug_el, l_h);
-                int cmp_result = cmp(NULL, cur, cur->next);
                 if (cur->next->prev != cur) {
-                        printk(KERN_EMERG "list_sort() returned "
-                                                "a corrupted list!\n");
-                        return 1;
-                } else if (cmp_result > 0) {
-                        printk(KERN_EMERG "list_sort() failed to sort!\n");
-                        return 1;
-                } else if (cmp_result == 0 &&
-                                el->serial >= container_of(cur->next,
-                                        struct debug_el, l_h)->serial) {
-                        printk(KERN_EMERG "list_sort() failed to preserve order"
-                                                 " of equivalent elements!\n");
-                        return 1;
+                        printk(KERN_ERR "list_sort_test: error: list is "
+                                        "corrupted\n");
+                        goto exit;
+                }
+
+                cmp_result = cmp(NULL, cur, cur->next);
+                if (cmp_result > 0) {
+                        printk(KERN_ERR "list_sort_test: error: list is not "
+                                        "sorted\n");
+                        goto exit;
+                }
+
+                el = container_of(cur, struct debug_el, list);
+                el1 = container_of(cur->next, struct debug_el, list);
+                if (cmp_result == 0 && el->serial >= el1->serial) {
+                        printk(KERN_ERR "list_sort_test: error: order of "
+                                        "equivalent elements not preserved\n");
+                        goto exit;
+                }
+
+                if (check(el, el1)) {
+                        printk(KERN_ERR "list_sort_test: error: element check "
+                                        "failed\n");
+                        goto exit;
                 }
-                kfree(cur->prev);
                 count++;
         }
-        kfree(cur);
-        if (count != LIST_SORT_TEST_LENGTH) {
-                printk(KERN_EMERG "list_sort() returned list of"
-                                                "different length!\n");
-                return 1;
+
+        if (count != TEST_LIST_LEN) {
+                printk(KERN_ERR "list_sort_test: error: bad list length %d",
+                                count);
+                goto exit;
         }
-        return 0;
+
+        err = 0;
+exit:
+        kfree(elts);
+        list_for_each_safe(cur, tmp, &head) {
+                list_del(cur);
+                kfree(container_of(cur, struct debug_el, list));
+        }
+        return err;
 }
 module_init(list_sort_test);
-#endif
+#endif /* CONFIG_TEST_LIST_SORT */
diff --git a/lib/parser.c b/lib/parser.c
index fb34977246bb..6e89eca5cca0 100644
--- a/lib/parser.c
+++ b/lib/parser.c
@@ -128,12 +128,13 @@ static int match_number(substring_t *s, int *result, int base)
         char *endp;
         char *buf;
         int ret;
+        size_t len = s->to - s->from;
 
-        buf = kmalloc(s->to - s->from + 1, GFP_KERNEL);
+        buf = kmalloc(len + 1, GFP_KERNEL);
         if (!buf)
                 return -ENOMEM;
-        memcpy(buf, s->from, s->to - s->from);
-        buf[s->to - s->from] = '\0';
+        memcpy(buf, s->from, len);
+        buf[len] = '\0';
         *result = simple_strtol(buf, &endp, base);
         ret = 0;
         if (endp == buf)
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index ec9048e74f44..604678d7d06d 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -8,10 +8,53 @@
 #include <linux/init.h>
 #include <linux/cpu.h>
 #include <linux/module.h>
+#include <linux/debugobjects.h>
 
 static LIST_HEAD(percpu_counters);
 static DEFINE_MUTEX(percpu_counters_lock);
 
+#ifdef CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER
+
+static struct debug_obj_descr percpu_counter_debug_descr;
+
+static int percpu_counter_fixup_free(void *addr, enum debug_obj_state state)
+{
+        struct percpu_counter *fbc = addr;
+
+        switch (state) {
+        case ODEBUG_STATE_ACTIVE:
+                percpu_counter_destroy(fbc);
+                debug_object_free(fbc, &percpu_counter_debug_descr);
+                return 1;
+        default:
+                return 0;
+        }
+}
+
+static struct debug_obj_descr percpu_counter_debug_descr = {
+        .name           = "percpu_counter",
+        .fixup_free     = percpu_counter_fixup_free,
+};
+
+static inline void debug_percpu_counter_activate(struct percpu_counter *fbc)
+{
+        debug_object_init(fbc, &percpu_counter_debug_descr);
+        debug_object_activate(fbc, &percpu_counter_debug_descr);
+}
+
+static inline void debug_percpu_counter_deactivate(struct percpu_counter *fbc)
+{
+        debug_object_deactivate(fbc, &percpu_counter_debug_descr);
+        debug_object_free(fbc, &percpu_counter_debug_descr);
+}
+
+#else   /* CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER */
+static inline void debug_percpu_counter_activate(struct percpu_counter *fbc)
+{ }
+static inline void debug_percpu_counter_deactivate(struct percpu_counter *fbc)
+{ }
+#endif  /* CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER */
+
 void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
 {
         int cpu;
@@ -30,9 +73,9 @@ void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
 {
         s64 count;
         s32 *pcount;
-        int cpu = get_cpu();
 
-        pcount = per_cpu_ptr(fbc->counters, cpu);
+        preempt_disable();
+        pcount = this_cpu_ptr(fbc->counters);
         count = *pcount + amount;
         if (count >= batch || count <= -batch) {
                 spin_lock(&fbc->lock);
@@ -42,7 +85,7 @@ void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
         } else {
                 *pcount = count;
         }
-        put_cpu();
+        preempt_enable();
 }
 EXPORT_SYMBOL(__percpu_counter_add);
 
@@ -75,7 +118,11 @@ int __percpu_counter_init(struct percpu_counter *fbc, s64 amount,
         fbc->counters = alloc_percpu(s32);
         if (!fbc->counters)
                 return -ENOMEM;
+
+        debug_percpu_counter_activate(fbc);
+
 #ifdef CONFIG_HOTPLUG_CPU
+        INIT_LIST_HEAD(&fbc->list);
         mutex_lock(&percpu_counters_lock);
         list_add(&fbc->list, &percpu_counters);
         mutex_unlock(&percpu_counters_lock);
@@ -89,6 +136,8 @@ void percpu_counter_destroy(struct percpu_counter *fbc)
         if (!fbc->counters)
                 return;
 
+        debug_percpu_counter_deactivate(fbc);
+
 #ifdef CONFIG_HOTPLUG_CPU
         mutex_lock(&percpu_counters_lock);
         list_del(&fbc->list);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 7af9d841c43b..c150d3dafff4 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -988,8 +988,15 @@ static noinline_for_stack
 char *pointer(const char *fmt, char *buf, char *end, void *ptr,
               struct printf_spec spec)
 {
-        if (!ptr)
+        if (!ptr) {
+                /*
+                 * Print (null) with the same width as a pointer so it makes
+                 * tabular output look nice.
+                 */
+                if (spec.field_width == -1)
+                        spec.field_width = 2 * sizeof(void *);
                 return string(buf, end, "(null)", spec);
+        }
 
         switch (*fmt) {
         case 'F':
@@ -1031,7 +1038,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
         }
         spec.flags |= SMALL;
         if (spec.field_width == -1) {
-                spec.field_width = 2*sizeof(void *);
+                spec.field_width = 2 * sizeof(void *);
                 spec.flags |= ZEROPAD;
         }
         spec.base = 16;
@@ -1497,7 +1504,7 @@ EXPORT_SYMBOL(snprintf);
  * @...: Arguments for the format string
  *
  * The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is <= 0 the function returns 0.
+ * the trailing '\0'. If @size is == 0 the function returns 0.
  */
 
 int scnprintf(char *buf, size_t size, const char *fmt, ...)
@@ -1509,7 +1516,11 @@ int scnprintf(char *buf, size_t size, const char *fmt, ...)
         i = vsnprintf(buf, size, fmt, args);
         va_end(args);
 
-        return (i >= size) ? (size - 1) : i;
+        if (likely(i < size))
+                return i;
+        if (size != 0)
+                return size - 1;
+        return 0;
 }
 EXPORT_SYMBOL(scnprintf);
 
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 65d420499a61..f2eb27884ffa 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -362,7 +362,7 @@ static int bdi_forker_thread(void *ptr)
 {
         struct bdi_writeback *me = ptr;
 
-        current->flags |= PF_FLUSHER | PF_SWAPWRITE;
+        current->flags |= PF_SWAPWRITE;
         set_freezable();
 
         /*
@@ -729,6 +729,7 @@ static wait_queue_head_t congestion_wqh[2] = {
                 __WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[0]),
                 __WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[1])
         };
+static atomic_t nr_bdi_congested[2];
 
 void clear_bdi_congested(struct backing_dev_info *bdi, int sync)
 {
@@ -736,7 +737,8 @@ void clear_bdi_congested(struct backing_dev_info *bdi, int sync)
         wait_queue_head_t *wqh = &congestion_wqh[sync];
 
         bit = sync ? BDI_sync_congested : BDI_async_congested;
-        clear_bit(bit, &bdi->state);
+        if (test_and_clear_bit(bit, &bdi->state))
+                atomic_dec(&nr_bdi_congested[sync]);
         smp_mb__after_clear_bit();
         if (waitqueue_active(wqh))
                 wake_up(wqh);
@@ -748,7 +750,8 @@ void set_bdi_congested(struct backing_dev_info *bdi, int sync)
         enum bdi_state bit;
 
         bit = sync ? BDI_sync_congested : BDI_async_congested;
-        set_bit(bit, &bdi->state);
+        if (!test_and_set_bit(bit, &bdi->state))
+                atomic_inc(&nr_bdi_congested[sync]);
 }
 EXPORT_SYMBOL(set_bdi_congested);
 
@@ -764,13 +767,72 @@ EXPORT_SYMBOL(set_bdi_congested);
 long congestion_wait(int sync, long timeout)
 {
         long ret;
+        unsigned long start = jiffies;
         DEFINE_WAIT(wait);
         wait_queue_head_t *wqh = &congestion_wqh[sync];
 
         prepare_to_wait(wqh, &wait, TASK_UNINTERRUPTIBLE);
         ret = io_schedule_timeout(timeout);
         finish_wait(wqh, &wait);
+
+        trace_writeback_congestion_wait(jiffies_to_usecs(timeout),
+                                        jiffies_to_usecs(jiffies - start));
+
         return ret;
 }
 EXPORT_SYMBOL(congestion_wait);
 
+/**
+ * wait_iff_congested - Conditionally wait for a backing_dev to become uncongested or a zone to complete writes
+ * @zone: A zone to check if it is heavily congested
+ * @sync: SYNC or ASYNC IO
+ * @timeout: timeout in jiffies
+ *
+ * In the event of a congested backing_dev (any backing_dev) and the given
+ * @zone has experienced recent congestion, this waits for up to @timeout
+ * jiffies for either a BDI to exit congestion of the given @sync queue
+ * or a write to complete.
+ *
+ * In the absense of zone congestion, cond_resched() is called to yield
+ * the processor if necessary but otherwise does not sleep.
+ *
+ * The return value is 0 if the sleep is for the full timeout. Otherwise,
+ * it is the number of jiffies that were still remaining when the function
+ * returned. return_value == timeout implies the function did not sleep.
+ */
+long wait_iff_congested(struct zone *zone, int sync, long timeout)
+{
+        long ret;
+        unsigned long start = jiffies;
+        DEFINE_WAIT(wait);
+        wait_queue_head_t *wqh = &congestion_wqh[sync];
+
+        /*
+         * If there is no congestion, or heavy congestion is not being
+         * encountered in the current zone, yield if necessary instead
+         * of sleeping on the congestion queue
+         */
+        if (atomic_read(&nr_bdi_congested[sync]) == 0 ||
+                        !zone_is_reclaim_congested(zone)) {
+                cond_resched();
+
+                /* In case we scheduled, work out time remaining */
+                ret = timeout - (jiffies - start);
+                if (ret < 0)
+                        ret = 0;
+
+                goto out;
+        }
+
+        /* Sleep until uncongested or a write happens */
+        prepare_to_wait(wqh, &wait, TASK_UNINTERRUPTIBLE);
+        ret = io_schedule_timeout(timeout);
+        finish_wait(wqh, &wait);
+
+out:
+        trace_writeback_wait_iff_congested(jiffies_to_usecs(timeout),
+                                        jiffies_to_usecs(jiffies - start));
+
+        return ret;
+}
+EXPORT_SYMBOL(wait_iff_congested);
diff --git a/mm/dmapool.c b/mm/dmapool.c
index 3df063706f53..4df2de77e069 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -311,6 +311,8 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
         size_t offset;
         void *retval;
 
+        might_sleep_if(mem_flags & __GFP_WAIT);
+
         spin_lock_irqsave(&pool->lock, flags);
  restart:
         list_for_each_entry(page, &pool->page_list, page_list) {
diff --git a/mm/filemap.c b/mm/filemap.c
index 3d4df44e4221..75572b5f2374 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -612,6 +612,19 @@ void __lock_page_nosync(struct page *page)
                                                         TASK_UNINTERRUPTIBLE);
 }
 
+int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
+                         unsigned int flags)
+{
+        if (!(flags & FAULT_FLAG_ALLOW_RETRY)) {
+                __lock_page(page);
+                return 1;
+        } else {
+                up_read(&mm->mmap_sem);
+                wait_on_page_locked(page);
+                return 0;
+        }
+}
+
 /**
  * find_get_page - find and get a page reference
  * @mapping: the address_space to search
@@ -1539,25 +1552,28 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
                  * waiting for the lock.
                  */
                 do_async_mmap_readahead(vma, ra, file, page, offset);
-                lock_page(page);
-
-                /* Did it get truncated? */
-                if (unlikely(page->mapping != mapping)) {
-                        unlock_page(page);
-                        put_page(page);
-                        goto no_cached_page;
-                }
         } else {
                 /* No page in the page cache at all */
                 do_sync_mmap_readahead(vma, ra, file, offset);
                 count_vm_event(PGMAJFAULT);
                 ret = VM_FAULT_MAJOR;
 retry_find:
-                page = find_lock_page(mapping, offset);
+                page = find_get_page(mapping, offset);
                 if (!page)
                         goto no_cached_page;
         }
 
+        if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags))
+                return ret | VM_FAULT_RETRY;
+
+        /* Did it get truncated? */
+        if (unlikely(page->mapping != mapping)) {
+                unlock_page(page);
+                put_page(page);
+                goto retry_find;
+        }
+        VM_BUG_ON(page->index != offset);
+
         /*
          * We have a locked page in the page cache, now we need to check
          * that it's up-to-date. If not, it is going to be due to an error.
@@ -2177,12 +2193,12 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
         }
 
         if (written > 0) {
-                loff_t end = pos + written;
-                if (end > i_size_read(inode) && !S_ISBLK(inode->i_mode)) {
-                        i_size_write(inode,  end);
+                pos += written;
+                if (pos > i_size_read(inode) && !S_ISBLK(inode->i_mode)) {
+                        i_size_write(inode, pos);
                         mark_inode_dirty(inode);
                 }
-                *ppos = end;
+                *ppos = pos;
         }
 out:
         return written;
diff --git a/mm/highmem.c b/mm/highmem.c
index 7a0aa1be4993..781e754a75ac 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -42,6 +42,10 @@
 unsigned long totalhigh_pages __read_mostly;
 EXPORT_SYMBOL(totalhigh_pages);
 
+
+DEFINE_PER_CPU(int, __kmap_atomic_idx);
+EXPORT_PER_CPU_SYMBOL(__kmap_atomic_idx);
+
 unsigned int nr_free_highpages (void)
 {
         pg_data_t *pgdat;
@@ -422,61 +426,3 @@ void __init page_address_init(void)
 }
 
 #endif  /* defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL) */
-
-#ifdef CONFIG_DEBUG_HIGHMEM
-
-void debug_kmap_atomic(enum km_type type)
-{
-        static int warn_count = 10;
-
-        if (unlikely(warn_count < 0))
-                return;
-
-        if (unlikely(in_interrupt())) {
-                if (in_nmi()) {
-                        if (type != KM_NMI && type != KM_NMI_PTE) {
-                                WARN_ON(1);
-                                warn_count--;
-                        }
-                } else if (in_irq()) {
-                        if (type != KM_IRQ0 && type != KM_IRQ1 &&
-                            type != KM_BIO_SRC_IRQ && type != KM_BIO_DST_IRQ &&
-                            type != KM_BOUNCE_READ && type != KM_IRQ_PTE) {
-                                WARN_ON(1);
-                                warn_count--;
-                        }
-                } else if (!irqs_disabled()) {  /* softirq */
-                        if (type != KM_IRQ0 && type != KM_IRQ1 &&
-                            type != KM_SOFTIRQ0 && type != KM_SOFTIRQ1 &&
-                            type != KM_SKB_SUNRPC_DATA &&
-                            type != KM_SKB_DATA_SOFTIRQ &&
-                            type != KM_BOUNCE_READ) {
-                                WARN_ON(1);
-                                warn_count--;
-                        }
-                }
-        }
-
-        if (type == KM_IRQ0 || type == KM_IRQ1 || type == KM_BOUNCE_READ ||
-                        type == KM_BIO_SRC_IRQ || type == KM_BIO_DST_IRQ ||
-                        type == KM_IRQ_PTE || type == KM_NMI ||
-                        type == KM_NMI_PTE ) {
-                if (!irqs_disabled()) {
-                        WARN_ON(1);
-                        warn_count--;
-                }
-        } else if (type == KM_SOFTIRQ0 || type == KM_SOFTIRQ1) {
-                if (irq_count() == 0 && !irqs_disabled()) {
-                        WARN_ON(1);
-                        warn_count--;
-                }
-        }
-#ifdef CONFIG_KGDB_KDB
-        if (unlikely(type == KM_KDB && atomic_read(&kgdb_active) == -1)) {
-                WARN_ON(1);
-                warn_count--;
-        }
-#endif /* CONFIG_KGDB_KDB */
-}
-
-#endif
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 96991ded82fe..c4a3558589ab 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2448,8 +2448,11 @@ retry_avoidcopy:
          * When the original hugepage is shared one, it does not have
          * anon_vma prepared.
          */
-        if (unlikely(anon_vma_prepare(vma)))
+        if (unlikely(anon_vma_prepare(vma))) {
+                /* Caller expects lock to be held */
+                spin_lock(&mm->page_table_lock);
                 return VM_FAULT_OOM;
+        }
 
         copy_user_huge_page(new_page, old_page, address, vma);
         __SetPageUptodate(new_page);
diff --git a/mm/internal.h b/mm/internal.h
index 6a697bb97fc5..dedb0aff673f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -62,7 +62,7 @@ extern bool is_free_buddy_page(struct page *page);
  */
 static inline unsigned long page_order(struct page *page)
 {
-        VM_BUG_ON(!PageBuddy(page));
+        /* PageBuddy() must be checked by the caller */
         return page_private(page);
 }
 
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 44a8cefeae6e..124324134ff6 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1292,6 +1292,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
         list_add(&hpage->lru, &pagelist);
         ret = migrate_huge_pages(&pagelist, new_page, MPOL_MF_MOVE_ALL, 0);
         if (ret) {
+                        putback_lru_pages(&pagelist);
                 pr_debug("soft offline: %#lx: migration failed %d, type %lx\n",
                          pfn, ret, page->flags);
                 if (ret > 0)
diff --git a/mm/memory.c b/mm/memory.c
index af82741caaa4..02e48aa0ed13 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -736,7 +736,7 @@ again:
         dst_pte = pte_alloc_map_lock(dst_mm, dst_pmd, addr, &dst_ptl);
         if (!dst_pte)
                 return -ENOMEM;
-        src_pte = pte_offset_map_nested(src_pmd, addr);
+        src_pte = pte_offset_map(src_pmd, addr);
         src_ptl = pte_lockptr(src_mm, src_pmd);
         spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING);
         orig_src_pte = src_pte;
@@ -767,7 +767,7 @@ again:
 
         arch_leave_lazy_mmu_mode();
         spin_unlock(src_ptl);
-        pte_unmap_nested(orig_src_pte);
+        pte_unmap(orig_src_pte);
         add_mm_rss_vec(dst_mm, rss);
         pte_unmap_unlock(orig_dst_pte, dst_ptl);
         cond_resched();
@@ -1591,7 +1591,7 @@ struct page *get_dump_page(unsigned long addr)
 }
 #endif /* CONFIG_ELF_CORE */
 
-pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr,
+pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
                         spinlock_t **ptl)
 {
         pgd_t * pgd = pgd_offset(mm, addr);
@@ -2080,7 +2080,7 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo
                  * zeroes.
                  */
                 if (__copy_from_user_inatomic(kaddr, uaddr, PAGE_SIZE))
-                        memset(kaddr, 0, PAGE_SIZE);
+                        clear_page(kaddr);
                 kunmap_atomic(kaddr, KM_USER0);
                 flush_dcache_page(dst);
         } else
@@ -2108,6 +2108,7 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo
 static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
                 unsigned long address, pte_t *page_table, pmd_t *pmd,
                 spinlock_t *ptl, pte_t orig_pte)
+        __releases(ptl)
 {
         struct page *old_page, *new_page;
         pte_t entry;
@@ -2627,6 +2628,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
         struct page *page, *swapcache = NULL;
         swp_entry_t entry;
         pte_t pte;
+        int locked;
         struct mem_cgroup *ptr = NULL;
         int exclusive = 0;
         int ret = 0;
@@ -2677,8 +2679,12 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
                 goto out_release;
         }
 
-        lock_page(page);
+        locked = lock_page_or_retry(page, mm, flags);
         delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
+        if (!locked) {
+                ret |= VM_FAULT_RETRY;
+                goto out_release;
+        }
 
         /*
          * Make sure try_to_free_swap or reuse_swap_page or swapoff did not
@@ -2927,7 +2933,8 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
         vmf.page = NULL;
 
         ret = vma->vm_ops->fault(vma, &vmf);
-        if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))
+        if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE |
+                            VM_FAULT_RETRY)))
                 return ret;
 
         if (unlikely(PageHWPoison(vmf.page))) {
@@ -3344,7 +3351,7 @@ int in_gate_area_no_task(unsigned long addr)
 
 #endif  /* __HAVE_ARCH_GATE_AREA */
 
-static int follow_pte(struct mm_struct *mm, unsigned long address,
+static int __follow_pte(struct mm_struct *mm, unsigned long address,
                 pte_t **ptepp, spinlock_t **ptlp)
 {
         pgd_t *pgd;
@@ -3381,6 +3388,17 @@ out:
         return -EINVAL;
 }
 
+static inline int follow_pte(struct mm_struct *mm, unsigned long address,
+                             pte_t **ptepp, spinlock_t **ptlp)
+{
+        int res;
+
+        /* (void) is needed to make gcc happy */
+        (void) __cond_lock(*ptlp,
+                           !(res = __follow_pte(mm, address, ptepp, ptlp)));
+        return res;
+}
+
 /**
  * follow_pfn - look up PFN at a user virtual address
  * @vma: memory mapping
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index d4e940a26945..9260314a221e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -602,27 +602,14 @@ static struct page *next_active_pageblock(struct page *page)
 /* Checks if this range of memory is likely to be hot-removable. */
 int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
 {
-        int type;
         struct page *page = pfn_to_page(start_pfn);
         struct page *end_page = page + nr_pages;
 
         /* Check the starting page of each pageblock within the range */
         for (; page < end_page; page = next_active_pageblock(page)) {
-                type = get_pageblock_migratetype(page);
-
-                /*
-                 * A pageblock containing MOVABLE or free pages is considered
-                 * removable
-                 */
-                if (type != MIGRATE_MOVABLE && !pageblock_free(page))
-                        return 0;
-
-                /*
-                 * A pageblock starting with a PageReserved page is not
-                 * considered removable.
-                 */
-                if (PageReserved(page))
+                if (!is_pageblock_removable_nolock(page))
                         return 0;
+                cond_resched();
         }
 
         /* All pageblocks in the memory block are likely to be hot-removable */
@@ -659,7 +646,7 @@ static int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn)
  * Scanning pfn is much easier than scanning lru list.
  * Scan pfn from start to end and Find LRU page.
  */
-int scan_lru_pages(unsigned long start, unsigned long end)
+static unsigned long scan_lru_pages(unsigned long start, unsigned long end)
 {
         unsigned long pfn;
         struct page *page;
@@ -709,29 +696,30 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
                                             page_is_file_cache(page));
 
                 } else {
-                        /* Becasue we don't have big zone->lock. we should
-                           check this again here. */
-                        if (page_count(page))
-                                not_managed++;
 #ifdef CONFIG_DEBUG_VM
                         printk(KERN_ALERT "removing pfn %lx from LRU failed\n",
                                pfn);
                         dump_page(page);
 #endif
+                        /* Becasue we don't have big zone->lock. we should
+                           check this again here. */
+                        if (page_count(page)) {
+                                not_managed++;
+                                ret = -EBUSY;
+                                break;
+                        }
                 }
         }
-        ret = -EBUSY;
-        if (not_managed) {
-                if (!list_empty(&source))
+        if (!list_empty(&source)) {
+                if (not_managed) {
+                        putback_lru_pages(&source);
+                        goto out;
+                }
+                /* this function returns # of failed pages */
+                ret = migrate_pages(&source, hotremove_migrate_alloc, 0, 1);
+                if (ret)
                         putback_lru_pages(&source);
-                goto out;
         }
-        ret = 0;
-        if (list_empty(&source))
-                goto out;
-        /* this function returns # of failed pages */
-        ret = migrate_pages(&source, hotremove_migrate_alloc, 0, 1);
-
 out:
         return ret;
 }
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index f969da5dd8a2..81a127643aea 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -924,15 +924,21 @@ static int migrate_to_node(struct mm_struct *mm, int source, int dest,
         nodemask_t nmask;
         LIST_HEAD(pagelist);
         int err = 0;
+        struct vm_area_struct *vma;
 
         nodes_clear(nmask);
         node_set(source, nmask);
 
-        check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask,
+        vma = check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask,
                         flags | MPOL_MF_DISCONTIG_OK, &pagelist);
+        if (IS_ERR(vma))
+                return PTR_ERR(vma);
 
-        if (!list_empty(&pagelist))
+        if (!list_empty(&pagelist)) {
                 err = migrate_pages(&pagelist, new_node_page, dest, 0);
+                if (err)
+                        putback_lru_pages(&pagelist);
+        }
 
         return err;
 }
@@ -1147,9 +1153,12 @@ static long do_mbind(unsigned long start, unsigned long len,
 
                 err = mbind_range(mm, start, end, new);
 
-                if (!list_empty(&pagelist))
+                if (!list_empty(&pagelist)) {
                         nr_failed = migrate_pages(&pagelist, new_vma_page,
                                                 (unsigned long)vma, 0);
+                        if (nr_failed)
+                                putback_lru_pages(&pagelist);
+                }
 
                 if (!err && nr_failed && (flags & MPOL_MF_STRICT))
                         err = -EIO;
diff --git a/mm/migrate.c b/mm/migrate.c
index f8c9bccf2520..fe5a3c6a5426 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -497,7 +497,6 @@ static int writeout(struct address_space *mapping, struct page *page)
                 .nr_to_write = 1,
                 .range_start = 0,
                 .range_end = LLONG_MAX,
-                .nonblocking = 1,
                 .for_reclaim = 1
         };
         int rc;
@@ -884,8 +883,9 @@ out:
  *
  * The function returns after 10 attempts or if no pages
  * are movable anymore because to has become empty
- * or no retryable pages exist anymore. All pages will be
- * returned to the LRU or freed.
+ * or no retryable pages exist anymore.
+ * Caller should call putback_lru_pages to return pages to the LRU
+ * or free list.
  *
  * Return: Number of pages not migrated or error code.
  */
@@ -932,8 +932,6 @@ out:
         if (!swapwrite)
                 current->flags &= ~PF_SWAPWRITE;
 
-        putback_lru_pages(from);
-
         if (rc)
                 return rc;
 
@@ -1039,7 +1037,7 @@ static int do_move_page_to_node_array(struct mm_struct *mm,
 
                 err = -EFAULT;
                 vma = find_vma(mm, pp->addr);
-                if (!vma || !vma_migratable(vma))
+                if (!vma || pp->addr < vma->vm_start || !vma_migratable(vma))
                         goto set_status;
 
                 page = follow_page(vma, pp->addr, FOLL_GET);
@@ -1088,9 +1086,12 @@ set_status:
         }
 
         err = 0;
-        if (!list_empty(&pagelist))
+        if (!list_empty(&pagelist)) {
                 err = migrate_pages(&pagelist, new_page_node,
                                 (unsigned long)pm, 0);
+                if (err)
+                        putback_lru_pages(&pagelist);
+        }
 
         up_read(&mm->mmap_sem);
         return err;
@@ -1203,7 +1204,7 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages,
                 int err = -EFAULT;
 
                 vma = find_vma(mm, addr);
-                if (!vma)
+                if (!vma || addr < vma->vm_start)
                         goto set_status;
 
                 page = follow_page(vma, addr, 0);
diff --git a/mm/mremap.c b/mm/mremap.c
index cde56ee51ef7..563fbdd6293a 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -101,7 +101,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
          * pte locks because exclusive mmap_sem prevents deadlock.
          */
         old_pte = pte_offset_map_lock(mm, old_pmd, old_addr, &old_ptl);
-        new_pte = pte_offset_map_nested(new_pmd, new_addr);
+        new_pte = pte_offset_map(new_pmd, new_addr);
         new_ptl = pte_lockptr(mm, new_pmd);
         if (new_ptl != old_ptl)
                 spin_lock_nested(new_ptl, SINGLE_DEPTH_NESTING);
@@ -119,7 +119,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
         arch_leave_lazy_mmu_mode();
         if (new_ptl != old_ptl)
                 spin_unlock(new_ptl);
-        pte_unmap_nested(new_pte - 1);
+        pte_unmap(new_pte - 1);
         pte_unmap_unlock(old_pte - 1, old_ptl);
         if (mapping)
                 spin_unlock(&mapping->i_mmap_lock);
diff --git a/mm/nommu.c b/mm/nommu.c
index 88ff091eb07a..30b5c20eec15 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -293,11 +293,58 @@ void *vmalloc(unsigned long size)
 }
 EXPORT_SYMBOL(vmalloc);
 
+/*
+ *      vzalloc - allocate virtually continguos memory with zero fill
+ *
+ *      @size:          allocation size
+ *
+ *      Allocate enough pages to cover @size from the page level
+ *      allocator and map them into continguos kernel virtual space.
+ *      The memory allocated is set to zero.
+ *
+ *      For tight control over page level allocator and protection flags
+ *      use __vmalloc() instead.
+ */
+void *vzalloc(unsigned long size)
+{
+        return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
+                        PAGE_KERNEL);
+}
+EXPORT_SYMBOL(vzalloc);
+
+/**
+ * vmalloc_node - allocate memory on a specific node
+ * @size:       allocation size
+ * @node:       numa node
+ *
+ * Allocate enough pages to cover @size from the page level
+ * allocator and map them into contiguous kernel virtual space.
+ *
+ * For tight control over page level allocator and protection flags
+ * use __vmalloc() instead.
+ */
 void *vmalloc_node(unsigned long size, int node)
 {
         return vmalloc(size);
 }
-EXPORT_SYMBOL(vmalloc_node);
+
+/**
+ * vzalloc_node - allocate memory on a specific node with zero fill
+ * @size:       allocation size
+ * @node:       numa node
+ *
+ * Allocate enough pages to cover @size from the page level
+ * allocator and map them into contiguous kernel virtual space.
+ * The memory allocated is set to zero.
+ *
+ * For tight control over page level allocator and protection flags
+ * use __vmalloc() instead.
+ */
+void *vzalloc_node(unsigned long size, int node)
+{
+        return vzalloc(size);
+}
+EXPORT_SYMBOL(vzalloc_node);
 
 #ifndef PAGE_KERNEL_EXEC
 # define PAGE_KERNEL_EXEC PAGE_KERNEL
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 4029583a1024..7dcca55ede7c 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -162,10 +162,11 @@ unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
                 return 0;
 
         /*
-         * Shortcut check for OOM_SCORE_ADJ_MIN so the entire heuristic doesn't
-         * need to be executed for something that cannot be killed.
+         * Shortcut check for a thread sharing p->mm that is OOM_SCORE_ADJ_MIN
+         * so the entire heuristic doesn't need to be executed for something
+         * that cannot be killed.
          */
-        if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) {
+        if (atomic_read(&p->mm->oom_disable_count)) {
                 task_unlock(p);
                 return 0;
         }
@@ -403,16 +404,40 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
 #define K(x) ((x) << (PAGE_SHIFT-10))
 static int oom_kill_task(struct task_struct *p, struct mem_cgroup *mem)
 {
+        struct task_struct *q;
+        struct mm_struct *mm;
+
         p = find_lock_task_mm(p);
         if (!p)
                 return 1;
 
+        /* mm cannot be safely dereferenced after task_unlock(p) */
+        mm = p->mm;
+
         pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
                 task_pid_nr(p), p->comm, K(p->mm->total_vm),
                 K(get_mm_counter(p->mm, MM_ANONPAGES)),
                 K(get_mm_counter(p->mm, MM_FILEPAGES)));
         task_unlock(p);
 
+        /*
+         * Kill all processes sharing p->mm in other thread groups, if any.
+         * They don't get access to memory reserves or a higher scheduler
+         * priority, though, to avoid depletion of all memory or task
+         * starvation.  This prevents mm->mmap_sem livelock when an oom killed
+         * task cannot exit because it requires the semaphore and its contended
+         * by another thread trying to allocate memory itself.  That thread will
+         * now get access to memory reserves since it has a pending fatal
+         * signal.
+         */
+        for_each_process(q)
+                if (q->mm == mm && !same_thread_group(q, p)) {
+                        task_lock(q);   /* Protect ->comm from prctl() */
+                        pr_err("Kill process %d (%s) sharing same memory\n",
+                                task_pid_nr(q), q->comm);
+                        task_unlock(q);
+                        force_sig(SIGKILL, q);
+                }
 
         set_tsk_thread_flag(p, TIF_MEMDIE);
         force_sig(SIGKILL, p);
@@ -680,7 +705,7 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
         read_lock(&tasklist_lock);
         if (sysctl_oom_kill_allocating_task &&
             !oom_unkillable_task(current, NULL, nodemask) &&
-            (current->signal->oom_adj != OOM_DISABLE)) {
+            current->mm && !atomic_read(&current->mm->oom_disable_count)) {
                 /*
                  * oom_kill_process() needs tasklist_lock held.  If it returns
                  * non-zero, current could not be killed so we must fallback to
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index e3bccac1f025..b840afa89761 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -415,14 +415,8 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty)
 
         if (vm_dirty_bytes)
                 dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE);
-        else {
-                int dirty_ratio;
-
-                dirty_ratio = vm_dirty_ratio;
-                if (dirty_ratio < 5)
-                        dirty_ratio = 5;
-                dirty = (dirty_ratio * available_memory) / 100;
-        }
+        else
+                dirty = (vm_dirty_ratio * available_memory) / 100;
 
         if (dirty_background_bytes)
                 background = DIV_ROUND_UP(dirty_background_bytes, PAGE_SIZE);
@@ -510,7 +504,7 @@ static void balance_dirty_pages(struct address_space *mapping,
                  * catch-up. This avoids (excessively) small writeouts
                  * when the bdi limits are ramping up.
                  */
-                if (nr_reclaimable + nr_writeback <
+                if (nr_reclaimable + nr_writeback <=
                                 (background_thresh + dirty_thresh) / 2)
                         break;
 
@@ -542,8 +536,8 @@ static void balance_dirty_pages(struct address_space *mapping,
                  * the last resort safeguard.
                  */
                 dirty_exceeded =
-                        (bdi_nr_reclaimable + bdi_nr_writeback >= bdi_thresh)
-                        || (nr_reclaimable + nr_writeback >= dirty_thresh);
+                        (bdi_nr_reclaimable + bdi_nr_writeback > bdi_thresh)
+                        || (nr_reclaimable + nr_writeback > dirty_thresh);
 
                 if (!dirty_exceeded)
                         break;
@@ -1121,6 +1115,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
 {
         if (mapping_cap_account_dirty(mapping)) {
                 __inc_zone_page_state(page, NR_FILE_DIRTY);
+                __inc_zone_page_state(page, NR_DIRTIED);
                 __inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
                 task_dirty_inc(current);
                 task_io_account_write(PAGE_CACHE_SIZE);
@@ -1129,6 +1124,18 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
 EXPORT_SYMBOL(account_page_dirtied);
 
 /*
+ * Helper function for set_page_writeback family.
+ * NOTE: Unlike account_page_dirtied this does not rely on being atomic
+ * wrt interrupts.
+ */
+void account_page_writeback(struct page *page)
+{
+        inc_zone_page_state(page, NR_WRITEBACK);
+        inc_zone_page_state(page, NR_WRITTEN);
+}
+EXPORT_SYMBOL(account_page_writeback);
+
+/*
  * For address_spaces which do not use buffers.  Just tag the page as dirty in
  * its radix tree.
  *
@@ -1366,7 +1373,7 @@ int test_set_page_writeback(struct page *page)
                 ret = TestSetPageWriteback(page);
         }
         if (!ret)
-                inc_zone_page_state(page, NR_WRITEBACK);
+                account_page_writeback(page);
         return ret;
 
 }
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2a362c52fdf4..07a654486f75 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -531,7 +531,7 @@ static inline void __free_one_page(struct page *page,
          * so it's less likely to be used soon and more likely to be merged
          * as a higher order page
          */
-        if ((order < MAX_ORDER-1) && pfn_valid_within(page_to_pfn(buddy))) {
+        if ((order < MAX_ORDER-2) && pfn_valid_within(page_to_pfn(buddy))) {
                 struct page *higher_page, *higher_buddy;
                 combined_idx = __find_combined_index(page_idx, order);
                 higher_page = page + combined_idx - page_idx;
@@ -1907,7 +1907,7 @@ __alloc_pages_high_priority(gfp_t gfp_mask, unsigned int order,
                         preferred_zone, migratetype);
 
                 if (!page && gfp_mask & __GFP_NOFAIL)
-                        congestion_wait(BLK_RW_ASYNC, HZ/50);
+                        wait_iff_congested(preferred_zone, BLK_RW_ASYNC, HZ/50);
         } while (!page && (gfp_mask & __GFP_NOFAIL));
 
         return page;
@@ -1932,7 +1932,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
         const gfp_t wait = gfp_mask & __GFP_WAIT;
 
         /* __GFP_HIGH is assumed to be the same as ALLOC_HIGH to save a branch. */
-        BUILD_BUG_ON(__GFP_HIGH != ALLOC_HIGH);
+        BUILD_BUG_ON(__GFP_HIGH != (__force gfp_t) ALLOC_HIGH);
 
         /*
          * The caller may dip into page reserves a bit more if the caller
@@ -1940,7 +1940,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
          * policy or is asking for __GFP_HIGH memory.  GFP_ATOMIC requests will
          * set both ALLOC_HARDER (!wait) and ALLOC_HIGH (__GFP_HIGH).
          */
-        alloc_flags |= (gfp_mask & __GFP_HIGH);
+        alloc_flags |= (__force int) (gfp_mask & __GFP_HIGH);
 
         if (!wait) {
                 alloc_flags |= ALLOC_HARDER;
@@ -2095,7 +2095,7 @@ rebalance:
         pages_reclaimed += did_some_progress;
         if (should_alloc_retry(gfp_mask, order, pages_reclaimed)) {
                 /* Wait for some write requests to complete then retry */
-                congestion_wait(BLK_RW_ASYNC, HZ/50);
+                wait_iff_congested(preferred_zone, BLK_RW_ASYNC, HZ/50);
                 goto rebalance;
         }
 
@@ -5297,12 +5297,65 @@ void set_pageblock_flags_group(struct page *page, unsigned long flags,
  * page allocater never alloc memory from ISOLATE block.
  */
 
+static int
+__count_immobile_pages(struct zone *zone, struct page *page, int count)
+{
+        unsigned long pfn, iter, found;
+        /*
+         * For avoiding noise data, lru_add_drain_all() should be called
+         * If ZONE_MOVABLE, the zone never contains immobile pages
+         */
+        if (zone_idx(zone) == ZONE_MOVABLE)
+                return true;
+
+        if (get_pageblock_migratetype(page) == MIGRATE_MOVABLE)
+                return true;
+
+        pfn = page_to_pfn(page);
+        for (found = 0, iter = 0; iter < pageblock_nr_pages; iter++) {
+                unsigned long check = pfn + iter;
+
+                if (!pfn_valid_within(check)) {
+                        iter++;
+                        continue;
+                }
+                page = pfn_to_page(check);
+                if (!page_count(page)) {
+                        if (PageBuddy(page))
+                                iter += (1 << page_order(page)) - 1;
+                        continue;
+                }
+                if (!PageLRU(page))
+                        found++;
+                /*
+                 * If there are RECLAIMABLE pages, we need to check it.
+                 * But now, memory offline itself doesn't call shrink_slab()
+                 * and it still to be fixed.
+                 */
+                /*
+                 * If the page is not RAM, page_count()should be 0.
+                 * we don't need more check. This is an _used_ not-movable page.
+                 *
+                 * The problematic thing here is PG_reserved pages. PG_reserved
+                 * is set to both of a memory hole page and a _used_ kernel
+                 * page at boot.
+                 */
+                if (found > count)
+                        return false;
+        }
+        return true;
+}
+
+bool is_pageblock_removable_nolock(struct page *page)
+{
+        struct zone *zone = page_zone(page);
+        return __count_immobile_pages(zone, page, 0);
+}
+
 int set_migratetype_isolate(struct page *page)
 {
         struct zone *zone;
-        struct page *curr_page;
-        unsigned long flags, pfn, iter;
-        unsigned long immobile = 0;
+        unsigned long flags, pfn;
         struct memory_isolate_notify arg;
         int notifier_ret;
         int ret = -EBUSY;
@@ -5312,11 +5365,6 @@ int set_migratetype_isolate(struct page *page)
         zone_idx = zone_idx(zone);
 
         spin_lock_irqsave(&zone->lock, flags);
-        if (get_pageblock_migratetype(page) == MIGRATE_MOVABLE ||
-            zone_idx == ZONE_MOVABLE) {
-                ret = 0;
-                goto out;
-        }
 
         pfn = page_to_pfn(page);
         arg.start_pfn = pfn;
@@ -5336,23 +5384,20 @@ int set_migratetype_isolate(struct page *page)
          */
         notifier_ret = memory_isolate_notify(MEM_ISOLATE_COUNT, &arg);
         notifier_ret = notifier_to_errno(notifier_ret);
-        if (notifier_ret || !arg.pages_found)
+        if (notifier_ret)
                 goto out;
-
-        for (iter = pfn; iter < (pfn + pageblock_nr_pages); iter++) {
-                if (!pfn_valid_within(pfn))
-                        continue;
-
-                curr_page = pfn_to_page(iter);
-                if (!page_count(curr_page) || PageLRU(curr_page))
-                        continue;
-
-                immobile++;
-        }
-
-        if (arg.pages_found == immobile)
+        /*
+         * FIXME: Now, memory hotplug doesn't call shrink_slab() by itself.
+         * We just check MOVABLE pages.
+         */
+        if (__count_immobile_pages(zone, page, arg.pages_found))
                 ret = 0;
 
+        /*
+         * immobile means "not-on-lru" paes. If immobile is larger than
+         * removable-by-driver pages reported by notifier, we'll fail.
+         */
+
 out:
         if (!ret) {
                 set_pageblock_migratetype(page, MIGRATE_ISOLATE);
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 5e0ffd967452..4ae42bb40892 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -86,7 +86,7 @@ undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn)
  * all pages in [start_pfn...end_pfn) must be in the same zone.
  * zone->lock must be held before call this.
  *
- * Returns 0 if all pages in the range is isolated.
+ * Returns 1 if all pages in the range is isolated.
  */
 static int
 __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn)
@@ -119,7 +119,6 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
         struct zone *zone;
         int ret;
 
-        pfn = start_pfn;
         /*
          * Note: pageblock_nr_page != MAX_ORDER. Then, chunks of free page
          * is not aligned to pageblock_nr_pages.
diff --git a/mm/rmap.c b/mm/rmap.c
index f5ad996a4a8f..1a8bf76bfd03 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -80,7 +80,7 @@ static inline struct anon_vma_chain *anon_vma_chain_alloc(void)
         return kmem_cache_alloc(anon_vma_chain_cachep, GFP_KERNEL);
 }
 
-void anon_vma_chain_free(struct anon_vma_chain *anon_vma_chain)
+static void anon_vma_chain_free(struct anon_vma_chain *anon_vma_chain)
 {
         kmem_cache_free(anon_vma_chain_cachep, anon_vma_chain);
 }
@@ -314,7 +314,7 @@ void __init anon_vma_init(void)
  * Getting a lock on a stable anon_vma from a page off the LRU is
  * tricky: page_lock_anon_vma rely on RCU to guard against the races.
  */
-struct anon_vma *page_lock_anon_vma(struct page *page)
+struct anon_vma *__page_lock_anon_vma(struct page *page)
 {
         struct anon_vma *anon_vma, *root_anon_vma;
         unsigned long anon_mapping;
@@ -348,6 +348,8 @@ out:
 }
 
 void page_unlock_anon_vma(struct anon_vma *anon_vma)
+        __releases(&anon_vma->root->lock)
+        __releases(RCU)
 {
         anon_vma_unlock(anon_vma);
         rcu_read_unlock();
@@ -407,7 +409,7 @@ unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
  *
  * On success returns with pte mapped and locked.
  */
-pte_t *page_check_address(struct page *page, struct mm_struct *mm,
+pte_t *__page_check_address(struct page *page, struct mm_struct *mm,
                           unsigned long address, spinlock_t **ptlp, int sync)
 {
         pgd_t *pgd;
diff --git a/mm/slab.c b/mm/slab.c
index fcae9815d3b3..b1e40dafbab3 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -901,7 +901,7 @@ static int transfer_objects(struct array_cache *to,
                 struct array_cache *from, unsigned int max)
 {
         /* Figure out how many entries to transfer */
-        int nr = min(min(from->avail, max), to->limit - to->avail);
+        int nr = min3(from->avail, max, to->limit - to->avail);
 
         if (!nr)
                 return 0;
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 9fc7bac7db0c..67ddaaf98c74 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -30,6 +30,7 @@
 #include <linux/capability.h>
 #include <linux/syscalls.h>
 #include <linux/memcontrol.h>
+#include <linux/poll.h>
 
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>
@@ -58,6 +59,10 @@ static struct swap_info_struct *swap_info[MAX_SWAPFILES];
 
 static DEFINE_MUTEX(swapon_mutex);
 
+static DECLARE_WAIT_QUEUE_HEAD(proc_poll_wait);
+/* Activity counter to indicate that a swapon or swapoff has occurred */
+static atomic_t proc_poll_event = ATOMIC_INIT(0);
+
 static inline unsigned char swap_count(unsigned char ent)
 {
         return ent & ~SWAP_HAS_CACHE;   /* may include SWAP_HAS_CONT flag */
@@ -1680,6 +1685,8 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
         }
         filp_close(swap_file, NULL);
         err = 0;
+        atomic_inc(&proc_poll_event);
+        wake_up_interruptible(&proc_poll_wait);
 
 out_dput:
         filp_close(victim, NULL);
@@ -1688,6 +1695,25 @@ out:
 }
 
 #ifdef CONFIG_PROC_FS
+struct proc_swaps {
+        struct seq_file seq;
+        int event;
+};
+
+static unsigned swaps_poll(struct file *file, poll_table *wait)
+{
+        struct proc_swaps *s = file->private_data;
+
+        poll_wait(file, &proc_poll_wait, wait);
+
+        if (s->event != atomic_read(&proc_poll_event)) {
+                s->event = atomic_read(&proc_poll_event);
+                return POLLIN | POLLRDNORM | POLLERR | POLLPRI;
+        }
+
+        return POLLIN | POLLRDNORM;
+}
+
 /* iterator */
 static void *swap_start(struct seq_file *swap, loff_t *pos)
 {
@@ -1771,7 +1797,24 @@ static const struct seq_operations swaps_op = {
 
 static int swaps_open(struct inode *inode, struct file *file)
 {
-        return seq_open(file, &swaps_op);
+        struct proc_swaps *s;
+        int ret;
+
+        s = kmalloc(sizeof(struct proc_swaps), GFP_KERNEL);
+        if (!s)
+                return -ENOMEM;
+
+        file->private_data = s;
+
+        ret = seq_open(file, &swaps_op);
+        if (ret) {
+                kfree(s);
+                return ret;
+        }
+
+        s->seq.private = s;
+        s->event = atomic_read(&proc_poll_event);
+        return ret;
 }
 
 static const struct file_operations proc_swaps_operations = {
@@ -1779,6 +1822,7 @@ static const struct file_operations proc_swaps_operations = {
         .read           = seq_read,
         .llseek         = seq_lseek,
         .release        = seq_release,
+        .poll           = swaps_poll,
 };
 
 static int __init procswaps_init(void)
@@ -2084,6 +2128,9 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
                 swap_info[prev]->next = type;
         spin_unlock(&swap_lock);
         mutex_unlock(&swapon_mutex);
+        atomic_inc(&proc_poll_event);
+        wake_up_interruptible(&proc_poll_wait);
+
         error = 0;
         goto out;
 bad_swap:
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9f909622a25e..a3d66b3dc5cb 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -293,13 +293,13 @@ static void __insert_vmap_area(struct vmap_area *va)
         struct rb_node *tmp;
 
         while (*p) {
-                struct vmap_area *tmp;
+                struct vmap_area *tmp_va;
 
                 parent = *p;
-                tmp = rb_entry(parent, struct vmap_area, rb_node);
-                if (va->va_start < tmp->va_end)
+                tmp_va = rb_entry(parent, struct vmap_area, rb_node);
+                if (va->va_start < tmp_va->va_end)
                         p = &(*p)->rb_left;
-                else if (va->va_end > tmp->va_start)
+                else if (va->va_end > tmp_va->va_start)
                         p = &(*p)->rb_right;
                 else
                         BUG();
@@ -1596,6 +1596,13 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
 }
 EXPORT_SYMBOL(__vmalloc);
 
+static inline void *__vmalloc_node_flags(unsigned long size,
+                                        int node, gfp_t flags)
+{
+        return __vmalloc_node(size, 1, flags, PAGE_KERNEL,
+                                        node, __builtin_return_address(0));
+}
+
 /**
  *      vmalloc  -  allocate virtually contiguous memory
  *      @size:          allocation size
@@ -1607,12 +1614,28 @@ EXPORT_SYMBOL(__vmalloc);
  */
 void *vmalloc(unsigned long size)
 {
-        return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL,
-                                        -1, __builtin_return_address(0));
+        return __vmalloc_node_flags(size, -1, GFP_KERNEL | __GFP_HIGHMEM);
 }
 EXPORT_SYMBOL(vmalloc);
 
 /**
+ *      vzalloc - allocate virtually contiguous memory with zero fill
+ *      @size:  allocation size
+ *      Allocate enough pages to cover @size from the page level
+ *      allocator and map them into contiguous kernel virtual space.
+ *      The memory allocated is set to zero.
+ *
+ *      For tight control over page level allocator and protection flags
+ *      use __vmalloc() instead.
+ */
+void *vzalloc(unsigned long size)
+{
+        return __vmalloc_node_flags(size, -1,
+                                GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
+}
+EXPORT_SYMBOL(vzalloc);
+
+/**
  * vmalloc_user - allocate zeroed virtually contiguous memory for userspace
  * @size: allocation size
  *
@@ -1653,6 +1676,25 @@ void *vmalloc_node(unsigned long size, int node)
 }
 EXPORT_SYMBOL(vmalloc_node);
 
+/**
+ * vzalloc_node - allocate memory on a specific node with zero fill
+ * @size:       allocation size
+ * @node:       numa node
+ *
+ * Allocate enough pages to cover @size from the page level
+ * allocator and map them into contiguous kernel virtual space.
+ * The memory allocated is set to zero.
+ *
+ * For tight control over page level allocator and protection flags
+ * use __vmalloc_node() instead.
+ */
+void *vzalloc_node(unsigned long size, int node)
+{
+        return __vmalloc_node_flags(size, node,
+                         GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
+}
+EXPORT_SYMBOL(vzalloc_node);
+
 #ifndef PAGE_KERNEL_EXEC
 # define PAGE_KERNEL_EXEC PAGE_KERNEL
 #endif
@@ -2350,6 +2392,7 @@ void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
 
 #ifdef CONFIG_PROC_FS
 static void *s_start(struct seq_file *m, loff_t *pos)
+        __acquires(&vmlist_lock)
 {
         loff_t n = *pos;
         struct vm_struct *v;
@@ -2376,6 +2419,7 @@ static void *s_next(struct seq_file *m, void *p, loff_t *pos)
 }
 
 static void s_stop(struct seq_file *m, void *p)
+        __releases(&vmlist_lock)
 {
         read_unlock(&vmlist_lock);
 }
diff --git a/mm/vmscan.c b/mm/vmscan.c
index b94c9464f262..b8a6fdc21312 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -51,6 +51,12 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/vmscan.h>
 
+enum lumpy_mode {
+        LUMPY_MODE_NONE,
+        LUMPY_MODE_ASYNC,
+        LUMPY_MODE_SYNC,
+};
+
 struct scan_control {
         /* Incremented by the number of inactive pages that were scanned */
         unsigned long nr_scanned;
@@ -82,7 +88,7 @@ struct scan_control {
          * Intend to reclaim enough continuous memory rather than reclaim
          * enough amount of memory. i.e, mode for high order allocation.
          */
-        bool lumpy_reclaim_mode;
+        enum lumpy_mode lumpy_reclaim_mode;
 
         /* Which cgroup do we reclaim from */
         struct mem_cgroup *mem_cgroup;
@@ -265,6 +271,36 @@ unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
         return ret;
 }
 
+static void set_lumpy_reclaim_mode(int priority, struct scan_control *sc,
+                                   bool sync)
+{
+        enum lumpy_mode mode = sync ? LUMPY_MODE_SYNC : LUMPY_MODE_ASYNC;
+
+        /*
+         * Some reclaim have alredy been failed. No worth to try synchronous
+         * lumpy reclaim.
+         */
+        if (sync && sc->lumpy_reclaim_mode == LUMPY_MODE_NONE)
+                return;
+
+        /*
+         * If we need a large contiguous chunk of memory, or have
+         * trouble getting a small set of contiguous pages, we
+         * will reclaim both active and inactive pages.
+         */
+        if (sc->order > PAGE_ALLOC_COSTLY_ORDER)
+                sc->lumpy_reclaim_mode = mode;
+        else if (sc->order && priority < DEF_PRIORITY - 2)
+                sc->lumpy_reclaim_mode = mode;
+        else
+                sc->lumpy_reclaim_mode = LUMPY_MODE_NONE;
+}
+
+static void disable_lumpy_reclaim_mode(struct scan_control *sc)
+{
+        sc->lumpy_reclaim_mode = LUMPY_MODE_NONE;
+}
+
 static inline int is_page_cache_freeable(struct page *page)
 {
         /*
@@ -275,7 +311,8 @@ static inline int is_page_cache_freeable(struct page *page)
         return page_count(page) - page_has_private(page) == 2;
 }
 
-static int may_write_to_queue(struct backing_dev_info *bdi)
+static int may_write_to_queue(struct backing_dev_info *bdi,
+                              struct scan_control *sc)
 {
         if (current->flags & PF_SWAPWRITE)
                 return 1;
@@ -283,6 +320,10 @@ static int may_write_to_queue(struct backing_dev_info *bdi)
                 return 1;
         if (bdi == current->backing_dev_info)
                 return 1;
+
+        /* lumpy reclaim for hugepage often need a lot of write */
+        if (sc->order > PAGE_ALLOC_COSTLY_ORDER)
+                return 1;
         return 0;
 }
 
@@ -307,12 +348,6 @@ static void handle_write_error(struct address_space *mapping,
         unlock_page(page);
 }
 
-/* Request for sync pageout. */
-enum pageout_io {
-        PAGEOUT_IO_ASYNC,
-        PAGEOUT_IO_SYNC,
-};
-
 /* possible outcome of pageout() */
 typedef enum {
         /* failed to write page out, page is locked */
@@ -330,7 +365,7 @@ typedef enum {
  * Calls ->writepage().
  */
 static pageout_t pageout(struct page *page, struct address_space *mapping,
-                                                enum pageout_io sync_writeback)
+                         struct scan_control *sc)
 {
         /*
          * If the page is dirty, only perform writeback if that write
@@ -366,7 +401,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
         }
         if (mapping->a_ops->writepage == NULL)
                 return PAGE_ACTIVATE;
-        if (!may_write_to_queue(mapping->backing_dev_info))
+        if (!may_write_to_queue(mapping->backing_dev_info, sc))
                 return PAGE_KEEP;
 
         if (clear_page_dirty_for_io(page)) {
@@ -376,7 +411,6 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
                         .nr_to_write = SWAP_CLUSTER_MAX,
                         .range_start = 0,
                         .range_end = LLONG_MAX,
-                        .nonblocking = 1,
                         .for_reclaim = 1,
                 };
 
@@ -394,7 +428,8 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
                  * direct reclaiming a large contiguous area and the
                  * first attempt to free a range of pages fails.
                  */
-                if (PageWriteback(page) && sync_writeback == PAGEOUT_IO_SYNC)
+                if (PageWriteback(page) &&
+                    sc->lumpy_reclaim_mode == LUMPY_MODE_SYNC)
                         wait_on_page_writeback(page);
 
                 if (!PageWriteback(page)) {
@@ -402,7 +437,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
                         ClearPageReclaim(page);
                 }
                 trace_mm_vmscan_writepage(page,
-                        trace_reclaim_flags(page, sync_writeback));
+                        trace_reclaim_flags(page, sc->lumpy_reclaim_mode));
                 inc_zone_page_state(page, NR_VMSCAN_WRITE);
                 return PAGE_SUCCESS;
         }
@@ -580,7 +615,7 @@ static enum page_references page_check_references(struct page *page,
         referenced_page = TestClearPageReferenced(page);
 
         /* Lumpy reclaim - ignore references */
-        if (sc->lumpy_reclaim_mode)
+        if (sc->lumpy_reclaim_mode != LUMPY_MODE_NONE)
                 return PAGEREF_RECLAIM;
 
         /*
@@ -616,7 +651,7 @@ static enum page_references page_check_references(struct page *page,
         }
 
         /* Reclaim if clean, defer dirty pages to writeback */
-        if (referenced_page)
+        if (referenced_page && !PageSwapBacked(page))
                 return PAGEREF_RECLAIM_CLEAN;
 
         return PAGEREF_RECLAIM;
@@ -644,12 +679,14 @@ static noinline_for_stack void free_page_list(struct list_head *free_pages)
  * shrink_page_list() returns the number of reclaimed pages
  */
 static unsigned long shrink_page_list(struct list_head *page_list,
-                                        struct scan_control *sc,
-                                        enum pageout_io sync_writeback)
+                                      struct zone *zone,
+                                      struct scan_control *sc)
 {
         LIST_HEAD(ret_pages);
         LIST_HEAD(free_pages);
         int pgactivate = 0;
+        unsigned long nr_dirty = 0;
+        unsigned long nr_congested = 0;
         unsigned long nr_reclaimed = 0;
 
         cond_resched();
@@ -669,6 +706,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
                         goto keep;
 
                 VM_BUG_ON(PageActive(page));
+                VM_BUG_ON(page_zone(page) != zone);
 
                 sc->nr_scanned++;
 
@@ -694,10 +732,13 @@ static unsigned long shrink_page_list(struct list_head *page_list,
                          * for any page for which writeback has already
                          * started.
                          */
-                        if (sync_writeback == PAGEOUT_IO_SYNC && may_enter_fs)
+                        if (sc->lumpy_reclaim_mode == LUMPY_MODE_SYNC &&
+                            may_enter_fs)
                                 wait_on_page_writeback(page);
-                        else
-                                goto keep_locked;
+                        else {
+                                unlock_page(page);
+                                goto keep_lumpy;
+                        }
                 }
 
                 references = page_check_references(page, sc);
@@ -743,6 +784,8 @@ static unsigned long shrink_page_list(struct list_head *page_list,
                 }
 
                 if (PageDirty(page)) {
+                        nr_dirty++;
+
                         if (references == PAGEREF_RECLAIM_CLEAN)
                                 goto keep_locked;
                         if (!may_enter_fs)
@@ -751,14 +794,18 @@ static unsigned long shrink_page_list(struct list_head *page_list,
                                 goto keep_locked;
 
                         /* Page is dirty, try to write it out here */
-                        switch (pageout(page, mapping, sync_writeback)) {
+                        switch (pageout(page, mapping, sc)) {
                         case PAGE_KEEP:
+                                nr_congested++;
                                 goto keep_locked;
                         case PAGE_ACTIVATE:
                                 goto activate_locked;
                         case PAGE_SUCCESS:
-                                if (PageWriteback(page) || PageDirty(page))
+                                if (PageWriteback(page))
+                                        goto keep_lumpy;
+                                if (PageDirty(page))
                                         goto keep;
+
                                 /*
                                  * A synchronous write - probably a ramdisk.  Go
                                  * ahead and try to reclaim the page.
@@ -841,6 +888,7 @@ cull_mlocked:
                         try_to_free_swap(page);
                 unlock_page(page);
                 putback_lru_page(page);
+                disable_lumpy_reclaim_mode(sc);
                 continue;
 
 activate_locked:
@@ -853,10 +901,21 @@ activate_locked:
 keep_locked:
                 unlock_page(page);
 keep:
+                disable_lumpy_reclaim_mode(sc);
+keep_lumpy:
                 list_add(&page->lru, &ret_pages);
                 VM_BUG_ON(PageLRU(page) || PageUnevictable(page));
         }
 
+        /*
+         * Tag a zone as congested if all the dirty pages encountered were
+         * backed by a congested BDI. In this case, reclaimers should just
+         * back off and wait for congestion to clear because further reclaim
+         * will encounter the same problem
+         */
+        if (nr_dirty == nr_congested)
+                zone_set_flag(zone, ZONE_CONGESTED);
+
         free_page_list(&free_pages);
 
         list_splice(&ret_pages, page_list);
@@ -1006,7 +1065,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
 
                         /* Check that we have not crossed a zone boundary. */
                         if (unlikely(page_zone_id(cursor_page) != zone_id))
-                                continue;
+                                break;
 
                         /*
                          * If we don't have enough swap space, reclaiming of
@@ -1014,8 +1073,8 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                          * pointless.
                          */
                         if (nr_swap_pages <= 0 && PageAnon(cursor_page) &&
-                                        !PageSwapCache(cursor_page))
-                                continue;
+                            !PageSwapCache(cursor_page))
+                                break;
 
                         if (__isolate_lru_page(cursor_page, mode, file) == 0) {
                                 list_move(&cursor_page->lru, dst);
@@ -1026,11 +1085,16 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                                         nr_lumpy_dirty++;
                                 scan++;
                         } else {
-                                if (mode == ISOLATE_BOTH &&
-                                                page_count(cursor_page))
-                                        nr_lumpy_failed++;
+                                /* the page is freed already. */
+                                if (!page_count(cursor_page))
+                                        continue;
+                                break;
                         }
                 }
+
+                /* If we break out of the loop above, lumpy reclaim failed */
+                if (pfn < end_pfn)
+                        nr_lumpy_failed++;
         }
 
         *scanned = scan;
@@ -1253,7 +1317,7 @@ static inline bool should_reclaim_stall(unsigned long nr_taken,
                 return false;
 
         /* Only stall on lumpy reclaim */
-        if (!sc->lumpy_reclaim_mode)
+        if (sc->lumpy_reclaim_mode == LUMPY_MODE_NONE)
                 return false;
 
         /* If we have relaimed everything on the isolated list, no stall */
@@ -1286,7 +1350,6 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
         unsigned long nr_scanned;
         unsigned long nr_reclaimed = 0;
         unsigned long nr_taken;
-        unsigned long nr_active;
         unsigned long nr_anon;
         unsigned long nr_file;
 
@@ -1298,15 +1361,15 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
                         return SWAP_CLUSTER_MAX;
         }
 
-
+        set_lumpy_reclaim_mode(priority, sc, false);
         lru_add_drain();
         spin_lock_irq(&zone->lru_lock);
 
         if (scanning_global_lru(sc)) {
                 nr_taken = isolate_pages_global(nr_to_scan,
                         &page_list, &nr_scanned, sc->order,
-                        sc->lumpy_reclaim_mode ?
-                                ISOLATE_BOTH : ISOLATE_INACTIVE,
+                        sc->lumpy_reclaim_mode == LUMPY_MODE_NONE ?
+                                        ISOLATE_INACTIVE : ISOLATE_BOTH,
                         zone, 0, file);
                 zone->pages_scanned += nr_scanned;
                 if (current_is_kswapd())
@@ -1318,8 +1381,8 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
         } else {
                 nr_taken = mem_cgroup_isolate_pages(nr_to_scan,
                         &page_list, &nr_scanned, sc->order,
-                        sc->lumpy_reclaim_mode ?
-                                ISOLATE_BOTH : ISOLATE_INACTIVE,
+                        sc->lumpy_reclaim_mode == LUMPY_MODE_NONE ?
+                                        ISOLATE_INACTIVE : ISOLATE_BOTH,
                         zone, sc->mem_cgroup,
                         0, file);
                 /*
@@ -1337,20 +1400,12 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
 
         spin_unlock_irq(&zone->lru_lock);
 
-        nr_reclaimed = shrink_page_list(&page_list, sc, PAGEOUT_IO_ASYNC);
+        nr_reclaimed = shrink_page_list(&page_list, zone, sc);
 
         /* Check if we should syncronously wait for writeback */
         if (should_reclaim_stall(nr_taken, nr_reclaimed, priority, sc)) {
-                congestion_wait(BLK_RW_ASYNC, HZ/10);
-
-                /*
-                 * The attempt at page out may have made some
-                 * of the pages active, mark them inactive again.
-                 */
-                nr_active = clear_active_flags(&page_list, NULL);
-                count_vm_events(PGDEACTIVATE, nr_active);
-
-                nr_reclaimed += shrink_page_list(&page_list, sc, PAGEOUT_IO_SYNC);
+                set_lumpy_reclaim_mode(priority, sc, true);
+                nr_reclaimed += shrink_page_list(&page_list, zone, sc);
         }
 
         local_irq_disable();
@@ -1359,6 +1414,12 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
         __count_zone_vm_events(PGSTEAL, zone, nr_reclaimed);
 
         putback_lru_pages(zone, sc, nr_anon, nr_file, &page_list);
+
+        trace_mm_vmscan_lru_shrink_inactive(zone->zone_pgdat->node_id,
+                zone_idx(zone),
+                nr_scanned, nr_reclaimed,
+                priority,
+                trace_shrink_flags(file, sc->lumpy_reclaim_mode));
         return nr_reclaimed;
 }
 
@@ -1506,6 +1567,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
         spin_unlock_irq(&zone->lru_lock);
 }
 
+#ifdef CONFIG_SWAP
 static int inactive_anon_is_low_global(struct zone *zone)
 {
         unsigned long active, inactive;
@@ -1531,12 +1593,26 @@ static int inactive_anon_is_low(struct zone *zone, struct scan_control *sc)
 {
         int low;
 
+        /*
+         * If we don't have swap space, anonymous page deactivation
+         * is pointless.
+         */
+        if (!total_swap_pages)
+                return 0;
+
         if (scanning_global_lru(sc))
                 low = inactive_anon_is_low_global(zone);
         else
                 low = mem_cgroup_inactive_anon_is_low(sc->mem_cgroup);
         return low;
 }
+#else
+static inline int inactive_anon_is_low(struct zone *zone,
+                                        struct scan_control *sc)
+{
+        return 0;
+}
+#endif
 
 static int inactive_file_is_low_global(struct zone *zone)
 {
@@ -1721,21 +1797,6 @@ out:
         }
 }
 
-static void set_lumpy_reclaim_mode(int priority, struct scan_control *sc)
-{
-        /*
-         * If we need a large contiguous chunk of memory, or have
-         * trouble getting a small set of contiguous pages, we
-         * will reclaim both active and inactive pages.
-         */
-        if (sc->order > PAGE_ALLOC_COSTLY_ORDER)
-                sc->lumpy_reclaim_mode = 1;
-        else if (sc->order && priority < DEF_PRIORITY - 2)
-                sc->lumpy_reclaim_mode = 1;
-        else
-                sc->lumpy_reclaim_mode = 0;
-}
-
 /*
  * This is a basic per-zone page freer.  Used by both kswapd and direct reclaim.
  */
@@ -1750,8 +1811,6 @@ static void shrink_zone(int priority, struct zone *zone,
 
         get_scan_count(zone, sc, nr, priority);
 
-        set_lumpy_reclaim_mode(priority, sc);
-
         while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] ||
                                         nr[LRU_INACTIVE_FILE]) {
                 for_each_evictable_lru(l) {
@@ -1782,7 +1841,7 @@ static void shrink_zone(int priority, struct zone *zone,
          * Even if we did not try to evict anon pages at all, we want to
          * rebalance the anon lru active/inactive ratio.
          */
-        if (inactive_anon_is_low(zone, sc) && nr_swap_pages > 0)
+        if (inactive_anon_is_low(zone, sc))
                 shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0);
 
         throttle_vm_writeout(sc->gfp_mask);
@@ -1937,21 +1996,16 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
 
                 /* Take a nap, wait for some writeback to complete */
                 if (!sc->hibernation_mode && sc->nr_scanned &&
-                    priority < DEF_PRIORITY - 2)
-                        congestion_wait(BLK_RW_ASYNC, HZ/10);
+                    priority < DEF_PRIORITY - 2) {
+                        struct zone *preferred_zone;
+
+                        first_zones_zonelist(zonelist, gfp_zone(sc->gfp_mask),
+                                                        NULL, &preferred_zone);
+                        wait_iff_congested(preferred_zone, BLK_RW_ASYNC, HZ/10);
+                }
         }
 
 out:
-        /*
-         * Now that we've scanned all the zones at this priority level, note
-         * that level within the zone so that the next thread which performs
-         * scanning of this zone will immediately start out at this priority
-         * level.  This affects only the decision whether or not to bring
-         * mapped pages onto the inactive list.
-         */
-        if (priority < 0)
-                priority = 0;
-
         delayacct_freepages_end();
         put_mems_allowed();
 
@@ -2247,6 +2301,15 @@ loop_again:
                                 if (!zone_watermark_ok(zone, order,
                                             min_wmark_pages(zone), end_zone, 0))
                                         has_under_min_watermark_zone = 1;
+                        } else {
+                                /*
+                                 * If a zone reaches its high watermark,
+                                 * consider it to be no longer congested. It's
+                                 * possible there are dirty pages backed by
+                                 * congested BDIs but as pressure is relieved,
+                                 * spectulatively avoid congestion waits
+                                 */
+                                zone_clear_flag(zone, ZONE_CONGESTED);
                         }
 
                 }
@@ -2987,6 +3050,7 @@ int scan_unevictable_handler(struct ctl_table *table, int write,
         return 0;
 }
 
+#ifdef CONFIG_NUMA
 /*
  * per node 'scan_unevictable_pages' attribute.  On demand re-scan of
  * a specified node's per zone unevictable lists for evictable pages.
@@ -3033,4 +3097,4 @@ void scan_unevictable_unregister_node(struct node *node)
 {
         sysdev_remove_file(&node->sysdev, &attr_scan_unevictable_pages);
 }
-
+#endif
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 355a9e669aaa..cd2e42be7b68 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -17,6 +17,8 @@
 #include <linux/vmstat.h>
 #include <linux/sched.h>
 #include <linux/math64.h>
+#include <linux/writeback.h>
+#include <linux/compaction.h>
 
 #ifdef CONFIG_VM_EVENT_COUNTERS
 DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}};
@@ -394,6 +396,7 @@ void zone_statistics(struct zone *preferred_zone, struct zone *z)
 #endif
 
 #ifdef CONFIG_COMPACTION
+
 struct contig_page_info {
         unsigned long free_pages;
         unsigned long free_blocks_total;
@@ -745,6 +748,11 @@ static const char * const vmstat_text[] = {
         "nr_isolated_anon",
         "nr_isolated_file",
         "nr_shmem",
+        "nr_dirtied",
+        "nr_written",
+        "nr_dirty_threshold",
+        "nr_dirty_background_threshold",
+
 #ifdef CONFIG_NUMA
         "numa_hit",
         "numa_miss",
@@ -904,36 +912,44 @@ static const struct file_operations proc_zoneinfo_file_operations = {
         .release        = seq_release,
 };
 
+enum writeback_stat_item {
+        NR_DIRTY_THRESHOLD,
+        NR_DIRTY_BG_THRESHOLD,
+        NR_VM_WRITEBACK_STAT_ITEMS,
+};
+
 static void *vmstat_start(struct seq_file *m, loff_t *pos)
 {
         unsigned long *v;
-#ifdef CONFIG_VM_EVENT_COUNTERS
-        unsigned long *e;
-#endif
-        int i;
+        int i, stat_items_size;
 
         if (*pos >= ARRAY_SIZE(vmstat_text))
                 return NULL;
+        stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) +
+                          NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long);
 
 #ifdef CONFIG_VM_EVENT_COUNTERS
-        v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long)
-                        + sizeof(struct vm_event_state), GFP_KERNEL);
-#else
-        v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long),
-                        GFP_KERNEL);
+        stat_items_size += sizeof(struct vm_event_state);
 #endif
+
+        v = kmalloc(stat_items_size, GFP_KERNEL);
         m->private = v;
         if (!v)
                 return ERR_PTR(-ENOMEM);
         for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
                 v[i] = global_page_state(i);
+        v += NR_VM_ZONE_STAT_ITEMS;
+
+        global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD,
+                            v + NR_DIRTY_THRESHOLD);
+        v += NR_VM_WRITEBACK_STAT_ITEMS;
+
 #ifdef CONFIG_VM_EVENT_COUNTERS
-        e = v + NR_VM_ZONE_STAT_ITEMS;
-        all_vm_events(e);
-        e[PGPGIN] /= 2;         /* sectors -> kbytes */
-        e[PGPGOUT] /= 2;
+        all_vm_events(v);
+        v[PGPGIN] /= 2;         /* sectors -> kbytes */
+        v[PGPGOUT] /= 2;
 #endif
-        return v + *pos;
+        return m->private + *pos;
 }
 
 static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos)
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 0ebc777a6660..3c95304a0817 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -117,7 +117,7 @@
 
 static struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
 static DEFINE_SPINLOCK(unix_table_lock);
-static atomic_t unix_nr_socks = ATOMIC_INIT(0);
+static atomic_long_t unix_nr_socks;
 
 #define unix_sockets_unbound    (&unix_socket_table[UNIX_HASH_SIZE])
 
@@ -360,13 +360,13 @@ static void unix_sock_destructor(struct sock *sk)
         if (u->addr)
                 unix_release_addr(u->addr);
 
-        atomic_dec(&unix_nr_socks);
+        atomic_long_dec(&unix_nr_socks);
         local_bh_disable();
         sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
         local_bh_enable();
 #ifdef UNIX_REFCNT_DEBUG
-        printk(KERN_DEBUG "UNIX %p is destroyed, %d are still alive.\n", sk,
-                atomic_read(&unix_nr_socks));
+        printk(KERN_DEBUG "UNIX %p is destroyed, %ld are still alive.\n", sk,
+                atomic_long_read(&unix_nr_socks));
 #endif
 }
 
@@ -606,8 +606,8 @@ static struct sock *unix_create1(struct net *net, struct socket *sock)
         struct sock *sk = NULL;
         struct unix_sock *u;
 
-        atomic_inc(&unix_nr_socks);
-        if (atomic_read(&unix_nr_socks) > 2 * get_max_files())
+        atomic_long_inc(&unix_nr_socks);
+        if (atomic_long_read(&unix_nr_socks) > 2 * get_max_files())
                 goto out;
 
         sk = sk_alloc(net, PF_UNIX, GFP_KERNEL, &unix_proto);
@@ -632,7 +632,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock)
         unix_insert_socket(unix_sockets_unbound, sk);
 out:
         if (sk == NULL)
-                atomic_dec(&unix_nr_socks);
+                atomic_long_dec(&unix_nr_socks);
         else {
                 local_bh_disable();
                 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 2039acdf5122..90b54d4697fd 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2,7 +2,7 @@
 # (c) 2001, Dave Jones. (the file handling bit)
 # (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
 # (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
-# (c) 2008,2009, Andy Whitcroft <apw@canonical.com>
+# (c) 2008-2010 Andy Whitcroft <apw@canonical.com>
 # Licensed under the terms of the GNU GPL License version 2
 
 use strict;
@@ -10,7 +10,7 @@ use strict;
 my $P = $0;
 $P =~ s@.*/@@g;
 
-my $V = '0.30';
+my $V = '0.31';
 
 use Getopt::Long qw(:config no_auto_abbrev);
 
@@ -103,6 +103,8 @@ for my $key (keys %debug) {
         die "$@" if ($@);
 }
 
+my $rpt_cleaners = 0;
+
 if ($terse) {
         $emacs = 1;
         $quiet++;
@@ -150,6 +152,20 @@ our $Sparse	= qr{
 # We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
 our $Attribute  = qr{
                         const|
+                        __percpu|
+                        __nocast|
+                        __safe|
+                        __bitwise__|
+                        __packed__|
+                        __packed2__|
+                        __naked|
+                        __maybe_unused|
+                        __always_unused|
+                        __noreturn|
+                        __used|
+                        __cold|
+                        __noclone|
+                        __deprecated|
                         __read_mostly|
                         __kprobes|
                         __(?:mem|cpu|dev|)(?:initdata|initconst|init\b)|
@@ -675,15 +691,15 @@ sub ctx_block_get {
                 $blk .= $rawlines[$line];
 
                 # Handle nested #if/#else.
-                if ($rawlines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
+                if ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
                         push(@stack, $level);
-                } elsif ($rawlines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
+                } elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
                         $level = $stack[$#stack - 1];
-                } elsif ($rawlines[$line] =~ /^.\s*#\s*endif\b/) {
+                } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) {
                         $level = pop(@stack);
                 }
 
-                foreach my $c (split(//, $rawlines[$line])) {
+                foreach my $c (split(//, $lines[$line])) {
                         ##print "C<$c>L<$level><$open$close>O<$off>\n";
                         if ($off > 0) {
                                 $off--;
@@ -843,7 +859,12 @@ sub annotate_values {
                                 $av_preprocessor = 0;
                         }
 
-                } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\()/) {
+                } elsif ($cur =~ /^(\(\s*$Type\s*)\)/) {
+                        print "CAST($1)\n" if ($dbg_values > 1);
+                        push(@av_paren_type, $type);
+                        $type = 'C';
+
+                } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) {
                         print "DECLARE($1)\n" if ($dbg_values > 1);
                         $type = 'T';
 
@@ -1308,7 +1329,11 @@ sub process {
                 $here = "#$realline: " if ($file);
 
                 # extract the filename as it passes
-                if ($line=~/^\+\+\+\s+(\S+)/) {
+                if ($line =~ /^diff --git.*?(\S+)$/) {
+                        $realfile = $1;
+                        $realfile =~ s@^([^/]*)/@@;
+
+                } elsif ($line =~ /^\+\+\+\s+(\S+)/) {
                         $realfile = $1;
                         $realfile =~ s@^([^/]*)/@@;
 
@@ -1332,6 +1357,14 @@ sub process {
 
                 $cnt_lines++ if ($realcnt != 0);
 
+# Check for incorrect file permissions
+                if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
+                        my $permhere = $here . "FILE: $realfile\n";
+                        if ($realfile =~ /(Makefile|Kconfig|\.c|\.h|\.S|\.tmpl)$/) {
+                                ERROR("do not set execute permissions for source files\n" . $permhere);
+                        }
+                }
+
 #check the patch for a signoff:
                 if ($line =~ /^\s*signed-off-by:/i) {
                         # This is a signoff, if ugly, so do not double report.
@@ -1389,21 +1422,38 @@ sub process {
                 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
                         my $herevet = "$here\n" . cat_vet($rawline) . "\n";
                         ERROR("trailing whitespace\n" . $herevet);
+                        $rpt_cleaners = 1;
                 }
 
 # check for Kconfig help text having a real description
+# Only applies when adding the entry originally, after that we do not have
+# sufficient context to determine whether it is indeed long enough.
                 if ($realfile =~ /Kconfig/ &&
-                    $line =~ /\+?\s*(---)?help(---)?$/) {
+                    $line =~ /\+\s*(?:---)?help(?:---)?$/) {
                         my $length = 0;
-                        for (my $l = $linenr; defined($lines[$l]); $l++) {
-                                my $f = $lines[$l];
+                        my $cnt = $realcnt;
+                        my $ln = $linenr + 1;
+                        my $f;
+                        my $is_end = 0;
+                        while ($cnt > 0 && defined $lines[$ln - 1]) {
+                                $f = $lines[$ln - 1];
+                                $cnt-- if ($lines[$ln - 1] !~ /^-/);
+                                $is_end = $lines[$ln - 1] =~ /^\+/;
+                                $ln++;
+
+                                next if ($f =~ /^-/);
+                                $f =~ s/^.//;
                                 $f =~ s/#.*//;
                                 $f =~ s/^\s+//;
                                 next if ($f =~ /^$/);
-                                last if ($f =~ /^\s*config\s/);
+                                if ($f =~ /^\s*config\s/) {
+                                        $is_end = 1;
+                                        last;
+                                }
                                 $length++;
                         }
-                        WARN("please write a paragraph that describes the config symbol fully\n" . $herecurr) if ($length < 4);
+                        WARN("please write a paragraph that describes the config symbol fully\n" . $herecurr) if ($is_end && $length < 4);
+                        #print "is_end<$is_end> length<$length>\n";
                 }
 
 # check we are in a valid source file if not then ignore this hunk
@@ -1450,6 +1500,7 @@ sub process {
                     $rawline =~ /^\+\s*        \s*/) {
                         my $herevet = "$here\n" . cat_vet($rawline) . "\n";
                         ERROR("code indent should use tabs where possible\n" . $herevet);
+                        $rpt_cleaners = 1;
                 }
 
 # check for space before tabs.
@@ -1459,10 +1510,13 @@ sub process {
                 }
 
 # check for spaces at the beginning of a line.
-                if ($rawline =~ /^\+ / && $rawline !~ /\+ +\*/)  {
+# Exceptions:
+#  1) within comments
+#  2) indented preprocessor commands
+#  3) hanging labels
+                if ($rawline =~ /^\+ / && $line !~ /\+ *(?:$;|#|$Ident:)/)  {
                         my $herevet = "$here\n" . cat_vet($rawline) . "\n";
-                        WARN("please, no space for starting a line, \
-                                excluding comments\n" . $herevet);
+                        WARN("please, no spaces at the start of a line\n" . $herevet);
                 }
 
 # check we are in a valid C source file if not then ignore this hunk
@@ -1598,7 +1652,7 @@ sub process {
 
                         if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
                                 ERROR("that open brace { should be on the previous line\n" .
-                                        "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
+                                        "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
                         }
                         if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
                             $ctx =~ /\)\s*\;\s*$/ &&
@@ -1607,7 +1661,7 @@ sub process {
                                 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
                                 if ($nindent > $indent) {
                                         WARN("trailing semicolon indicates no statements, indent implies otherwise\n" .
-                                                "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
+                                                "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
                                 }
                         }
                 }
@@ -1768,8 +1822,17 @@ sub process {
                     !defined $suppress_export{$realline_next} &&
                     ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
                      $lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
+                        # Handle definitions which produce identifiers with
+                        # a prefix:
+                        #   XXX(foo);
+                        #   EXPORT_SYMBOL(something_foo);
                         my $name = $1;
-                        if ($stat !~ /(?:
+                        if ($stat =~ /^.([A-Z_]+)\s*\(\s*($Ident)/ &&
+                            $name =~ /^${Ident}_$2/) {
+#print "FOO C name<$name>\n";
+                                $suppress_export{$realline_next} = 1;
+
+                        } elsif ($stat !~ /(?:
                                 \n.}\s*$|
                                 ^.DEFINE_$Ident\(\Q$name\E\)|
                                 ^.DECLARE_$Ident\(\Q$name\E\)|
@@ -1806,6 +1869,23 @@ sub process {
                                 $herecurr);
                 }
 
+# check for static const char * arrays.
+                if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
+                        WARN("static const char * array should probably be static const char * const\n" .
+                                $herecurr);
+               }
+
+# check for static char foo[] = "bar" declarations.
+                if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
+                        WARN("static char array declaration should probably be static const char\n" .
+                                $herecurr);
+               }
+
+# check for declarations of struct pci_device_id
+                if ($line =~ /\bstruct\s+pci_device_id\s+\w+\s*\[\s*\]\s*\=\s*\{/) {
+                        WARN("Use DEFINE_PCI_DEVICE_TABLE for struct pci_device_id\n" . $herecurr);
+                }
+
 # check for new typedefs, only function parameters and sparse annotations
 # make sense.
                 if ($line =~ /\btypedef\s/ &&
@@ -1899,6 +1979,11 @@ sub process {
                         ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
                 }
 
+# missing space after union, struct or enum definition
+                if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?(?:\s+$Ident)?[=\{]/) {
+                    WARN("missing space after $1 definition\n" . $herecurr);
+                }
+
 # check for spacing round square brackets; allowed:
 #  1. with a type on the left -- int [] a;
 #  2. at the beginning of a line for slice initialisers -- [0...10] = 5,
@@ -2176,21 +2261,29 @@ sub process {
                         my $value = $2;
 
                         # Flatten any parentheses
-                        $value =~ s/\)\(/\) \(/g;
+                        $value =~ s/\(/ \(/g;
+                        $value =~ s/\)/\) /g;
                         while ($value =~ s/\[[^\{\}]*\]/1/ ||
                                $value !~ /(?:$Ident|-?$Constant)\s*
                                              $Compare\s*
                                              (?:$Ident|-?$Constant)/x &&
                                $value =~ s/\([^\(\)]*\)/1/) {
                         }
-
-                        if ($value =~ /^(?:$Ident|-?$Constant)$/) {
+#print "value<$value>\n";
+                        if ($value =~ /^\s*(?:$Ident|-?$Constant)\s*$/) {
                                 ERROR("return is not a function, parentheses are not required\n" . $herecurr);
 
                         } elsif ($spacing !~ /\s+/) {
                                 ERROR("space required before the open parenthesis '('\n" . $herecurr);
                         }
                 }
+# Return of what appears to be an errno should normally be -'ve
+                if ($line =~ /^.\s*return\s*(E[A-Z]*)\s*;/) {
+                        my $name = $1;
+                        if ($name ne 'EOF' && $name ne 'ERROR') {
+                                WARN("return of an errno should typically be -ve (return -$1)\n" . $herecurr);
+                        }
+                }
 
 # Need a space before open parenthesis after if, while etc
                 if ($line=~/\b(if|while|for|switch)\(/) {
@@ -2409,8 +2502,8 @@ sub process {
                                 \.$Ident\s*=\s*|
                                 ^\"|\"$
                         }x;
-                        #print "REST<$rest> dstat<$dstat>\n";
-                        if ($rest ne '') {
+                        #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
+                        if ($rest ne '' && $rest ne ',') {
                                 if ($rest !~ /while\s*\(/ &&
                                     $dstat !~ /$exceptions/)
                                 {
@@ -2839,6 +2932,15 @@ sub process {
                 print "\n" if ($quiet == 0);
         }
 
+        if ($quiet == 0) {
+                # If there were whitespace errors which cleanpatch can fix
+                # then suggest that.
+                if ($rpt_cleaners) {
+                        print "NOTE: whitespace errors detected, you may wish to use scripts/cleanpatch or\n";
+                        print "      scripts/cleanfile\n\n";
+                }
+        }
+
         if ($clean == 1 && $quiet == 0) {
                 print "$vname has no obvious style problems and is ready for submission.\n"
         }
diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index b2281982f52f..d21ec3a89603 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -13,7 +13,7 @@
 use strict;
 
 my $P = $0;
-my $V = '0.24';
+my $V = '0.26-beta6';
 
 use Getopt::Long qw(:config no_auto_abbrev);
 
@@ -24,15 +24,19 @@ my $email_maintainer = 1;
 my $email_list = 1;
 my $email_subscriber_list = 0;
 my $email_git_penguin_chiefs = 0;
-my $email_git = 1;
+my $email_git = 0;
 my $email_git_all_signature_types = 0;
 my $email_git_blame = 0;
+my $email_git_blame_signatures = 1;
+my $email_git_fallback = 1;
 my $email_git_min_signatures = 1;
 my $email_git_max_maintainers = 5;
 my $email_git_min_percent = 5;
 my $email_git_since = "1-year-ago";
 my $email_hg_since = "-365";
+my $interactive = 0;
 my $email_remove_duplicates = 1;
+my $email_use_mailmap = 1;
 my $output_multiline = 1;
 my $output_separator = ", ";
 my $output_roles = 0;
@@ -49,8 +53,13 @@ my $pattern_depth = 0;
 my $version = 0;
 my $help = 0;
 
+my $vcs_used = 0;
+
 my $exit = 0;
 
+my %commit_author_hash;
+my %commit_signer_hash;
+
 my @penguin_chief = ();
 push(@penguin_chief, "Linus Torvalds:torvalds\@linux-foundation.org");
 #Andrew wants in on most everything - 2009/01/14
@@ -73,7 +82,6 @@ my @signature_tags = ();
 push(@signature_tags, "Signed-off-by:");
 push(@signature_tags, "Reviewed-by:");
 push(@signature_tags, "Acked-by:");
-my $signaturePattern = "\(" . join("|", @signature_tags) . "\)";
 
 # rfc822 email address - preloaded methods go here.
 my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
@@ -86,31 +94,70 @@ my %VCS_cmds;
 my %VCS_cmds_git = (
     "execute_cmd" => \&git_execute_cmd,
     "available" => '(which("git") ne "") && (-d ".git")',
-    "find_signers_cmd" => "git log --no-color --since=\$email_git_since -- \$file",
-    "find_commit_signers_cmd" => "git log --no-color -1 \$commit",
+    "find_signers_cmd" =>
+        "git log --no-color --since=\$email_git_since " .
+            '--format="GitCommit: %H%n' .
+                      'GitAuthor: %an <%ae>%n' .
+                      'GitDate: %aD%n' .
+                      'GitSubject: %s%n' .
+                      '%b%n"' .
+            " -- \$file",
+    "find_commit_signers_cmd" =>
+        "git log --no-color " .
+            '--format="GitCommit: %H%n' .
+                      'GitAuthor: %an <%ae>%n' .
+                      'GitDate: %aD%n' .
+                      'GitSubject: %s%n' .
+                      '%b%n"' .
+            " -1 \$commit",
+    "find_commit_author_cmd" =>
+        "git log --no-color " .
+            '--format="GitCommit: %H%n' .
+                      'GitAuthor: %an <%ae>%n' .
+                      'GitDate: %aD%n' .
+                      'GitSubject: %s%n"' .
+            " -1 \$commit",
     "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
     "blame_file_cmd" => "git blame -l \$file",
-    "commit_pattern" => "^commit [0-9a-f]{40,40}",
-    "blame_commit_pattern" => "^([0-9a-f]+) "
+    "commit_pattern" => "^GitCommit: ([0-9a-f]{40,40})",
+    "blame_commit_pattern" => "^([0-9a-f]+) ",
+    "author_pattern" => "^GitAuthor: (.*)",
+    "subject_pattern" => "^GitSubject: (.*)",
 );
 
 my %VCS_cmds_hg = (
     "execute_cmd" => \&hg_execute_cmd,
     "available" => '(which("hg") ne "") && (-d ".hg")',
     "find_signers_cmd" =>
-        "hg log --date=\$email_hg_since" .
-                " --template='commit {node}\\n{desc}\\n' -- \$file",
-    "find_commit_signers_cmd" => "hg log --template='{desc}\\n' -r \$commit",
+        "hg log --date=\$email_hg_since " .
+            "--template='HgCommit: {node}\\n" .
+                        "HgAuthor: {author}\\n" .
+                        "HgSubject: {desc}\\n'" .
+            " -- \$file",
+    "find_commit_signers_cmd" =>
+        "hg log " .
+            "--template='HgSubject: {desc}\\n'" .
+            " -r \$commit",
+    "find_commit_author_cmd" =>
+        "hg log " .
+            "--template='HgCommit: {node}\\n" .
+                        "HgAuthor: {author}\\n" .
+                        "HgSubject: {desc|firstline}\\n'" .
+            " -r \$commit",
     "blame_range_cmd" => "",            # not supported
-    "blame_file_cmd" => "hg blame -c \$file",
-    "commit_pattern" => "^commit [0-9a-f]{40,40}",
-    "blame_commit_pattern" => "^([0-9a-f]+):"
+    "blame_file_cmd" => "hg blame -n \$file",
+    "commit_pattern" => "^HgCommit: ([0-9a-f]{40,40})",
+    "blame_commit_pattern" => "^([ 0-9a-f]+):",
+    "author_pattern" => "^HgAuthor: (.*)",
+    "subject_pattern" => "^HgSubject: (.*)",
 );
 
-if (-f "${lk_path}.get_maintainer.conf") {
+my $conf = which_conf(".get_maintainer.conf");
+if (-f $conf) {
     my @conf_args;
-    open(my $conffile, '<', "${lk_path}.get_maintainer.conf")
-        or warn "$P: Can't open .get_maintainer.conf: $!\n";
+    open(my $conffile, '<', "$conf")
+        or warn "$P: Can't find a readable .get_maintainer.conf file $!\n";
+
     while (<$conffile>) {
         my $line = $_;
 
@@ -136,13 +183,17 @@ if (!GetOptions(
                 'git!' => \$email_git,
                 'git-all-signature-types!' => \$email_git_all_signature_types,
                 'git-blame!' => \$email_git_blame,
+                'git-blame-signatures!' => \$email_git_blame_signatures,
+                'git-fallback!' => \$email_git_fallback,
                 'git-chief-penguins!' => \$email_git_penguin_chiefs,
                 'git-min-signatures=i' => \$email_git_min_signatures,
                 'git-max-maintainers=i' => \$email_git_max_maintainers,
                 'git-min-percent=i' => \$email_git_min_percent,
                 'git-since=s' => \$email_git_since,
                 'hg-since=s' => \$email_hg_since,
+                'i|interactive!' => \$interactive,
                 'remove-duplicates!' => \$email_remove_duplicates,
+                'mailmap!' => \$email_use_mailmap,
                 'm!' => \$email_maintainer,
                 'n!' => \$email_usename,
                 'l!' => \$email_list,
@@ -181,13 +232,9 @@ if (-t STDIN && !@ARGV) {
     die "$P: missing patchfile or -f file - use --help if necessary\n";
 }
 
-if ($output_separator ne ", ") {
-    $output_multiline = 0;
-}
-
-if ($output_rolestats) {
-    $output_roles = 1;
-}
+$output_multiline = 0 if ($output_separator ne ", ");
+$output_rolestats = 1 if ($interactive);
+$output_roles = 1 if ($output_rolestats);
 
 if ($sections) {
     $email = 0;
@@ -197,6 +244,7 @@ if ($sections) {
     $subsystem = 0;
     $web = 0;
     $keywords = 0;
+    $interactive = 0;
 } else {
     my $selections = $email + $scm + $status + $subsystem + $web;
     if ($selections == 0) {
@@ -215,10 +263,6 @@ if (!top_of_kernel_tree($lk_path)) {
         . "a linux kernel source tree.\n";
 }
 
-if ($email_git_all_signature_types) {
-    $signaturePattern = "(.+?)[Bb][Yy]:";
-}
-
 ## Read MAINTAINERS for type/value pairs
 
 my @typevalue = ();
@@ -253,31 +297,82 @@ while (<$maint>) {
 }
 close($maint);
 
-my %mailmap;
 
-if ($email_remove_duplicates) {
-    open(my $mailmap, '<', "${lk_path}.mailmap")
-        or warn "$P: Can't open .mailmap: $!\n";
-    while (<$mailmap>) {
-        my $line = $_;
+#
+# Read mail address map
+#
 
-        next if ($line =~ m/^\s*#/);
-        next if ($line =~ m/^\s*$/);
+my $mailmap;
 
-        my ($name, $address) = parse_email($line);
-        $line = format_email($name, $address, $email_usename);
+read_mailmap();
 
-        next if ($line =~ m/^\s*$/);
+sub read_mailmap {
+    $mailmap = {
+        names => {},
+        addresses => {}
+    };
 
-        if (exists($mailmap{$name})) {
-            my $obj = $mailmap{$name};
-            push(@$obj, $address);
-        } else {
-            my @arr = ($address);
-            $mailmap{$name} = \@arr;
+    return if (!$email_use_mailmap || !(-f "${lk_path}.mailmap"));
+
+    open(my $mailmap_file, '<', "${lk_path}.mailmap")
+        or warn "$P: Can't open .mailmap: $!\n";
+
+    while (<$mailmap_file>) {
+        s/#.*$//; #strip comments
+        s/^\s+|\s+$//g; #trim
+
+        next if (/^\s*$/); #skip empty lines
+        #entries have one of the following formats:
+        # name1 <mail1>
+        # <mail1> <mail2>
+        # name1 <mail1> <mail2>
+        # name1 <mail1> name2 <mail2>
+        # (see man git-shortlog)
+        if (/^(.+)<(.+)>$/) {
+            my $real_name = $1;
+            my $address = $2;
+
+            $real_name =~ s/\s+$//;
+            ($real_name, $address) = parse_email("$real_name <$address>");
+            $mailmap->{names}->{$address} = $real_name;
+
+        } elsif (/^<([^\s]+)>\s*<([^\s]+)>$/) {
+            my $real_address = $1;
+            my $wrong_address = $2;
+
+            $mailmap->{addresses}->{$wrong_address} = $real_address;
+
+        } elsif (/^(.+)<([^\s]+)>\s*<([^\s]+)>$/) {
+            my $real_name = $1;
+            my $real_address = $2;
+            my $wrong_address = $3;
+
+            $real_name =~ s/\s+$//;
+            ($real_name, $real_address) =
+                parse_email("$real_name <$real_address>");
+            $mailmap->{names}->{$wrong_address} = $real_name;
+            $mailmap->{addresses}->{$wrong_address} = $real_address;
+
+        } elsif (/^(.+)<([^\s]+)>\s*([^\s].*)<([^\s]+)>$/) {
+            my $real_name = $1;
+            my $real_address = $2;
+            my $wrong_name = $3;
+            my $wrong_address = $4;
+
+            $real_name =~ s/\s+$//;
+            ($real_name, $real_address) =
+                parse_email("$real_name <$real_address>");
+
+            $wrong_name =~ s/\s+$//;
+            ($wrong_name, $wrong_address) =
+                parse_email("$wrong_name <$wrong_address>");
+
+            my $wrong_email = format_email($wrong_name, $wrong_address, 1);
+            $mailmap->{names}->{$wrong_email} = $real_name;
+            $mailmap->{addresses}->{$wrong_email} = $real_address;
         }
     }
-    close($mailmap);
+    close($mailmap_file);
 }
 
 ## use the filenames on the command line or find the filenames in the patchfiles
@@ -302,7 +397,7 @@ foreach my $file (@ARGV) {
     }
     if ($from_filename) {
         push(@files, $file);
-        if (-f $file && ($keywords || $file_emails)) {
+        if ($file ne "MAINTAINERS" && -f $file && ($keywords || $file_emails)) {
             open(my $f, '<', $file)
                 or die "$P: Can't open $file: $!\n";
             my $text = do { local($/) ; <$f> };
@@ -357,67 +452,127 @@ foreach my $file (@ARGV) {
 
 @file_emails = uniq(@file_emails);
 
+my %email_hash_name;
+my %email_hash_address;
 my @email_to = ();
+my %hash_list_to;
 my @list_to = ();
 my @scm = ();
 my @web = ();
 my @subsystem = ();
 my @status = ();
+my %deduplicate_name_hash = ();
+my %deduplicate_address_hash = ();
+my $signature_pattern;
 
-# Find responsible parties
+my @maintainers = get_maintainers();
 
-foreach my $file (@files) {
+if (@maintainers) {
+    @maintainers = merge_email(@maintainers);
+    output(@maintainers);
+}
 
-    my %hash;
-    my $tvi = find_first_section();
-    while ($tvi < @typevalue) {
-        my $start = find_starting_index($tvi);
-        my $end = find_ending_index($tvi);
-        my $exclude = 0;
-        my $i;
-
-        #Do not match excluded file patterns
-
-        for ($i = $start; $i < $end; $i++) {
-            my $line = $typevalue[$i];
-            if ($line =~ m/^(\C):\s*(.*)/) {
-                my $type = $1;
-                my $value = $2;
-                if ($type eq 'X') {
-                    if (file_match_pattern($file, $value)) {
-                        $exclude = 1;
-                        last;
-                    }
-                }
-            }
-        }
+if ($scm) {
+    @scm = uniq(@scm);
+    output(@scm);
+}
+
+if ($status) {
+    @status = uniq(@status);
+    output(@status);
+}
+
+if ($subsystem) {
+    @subsystem = uniq(@subsystem);
+    output(@subsystem);
+}
+
+if ($web) {
+    @web = uniq(@web);
+    output(@web);
+}
+
+exit($exit);
+
+sub get_maintainers {
+    %email_hash_name = ();
+    %email_hash_address = ();
+    %commit_author_hash = ();
+    %commit_signer_hash = ();
+    @email_to = ();
+    %hash_list_to = ();
+    @list_to = ();
+    @scm = ();
+    @web = ();
+    @subsystem = ();
+    @status = ();
+    %deduplicate_name_hash = ();
+    %deduplicate_address_hash = ();
+    if ($email_git_all_signature_types) {
+        $signature_pattern = "(.+?)[Bb][Yy]:";
+    } else {
+        $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
+    }
+
+    # Find responsible parties
+
+    my %exact_pattern_match_hash = ();
+
+    foreach my $file (@files) {
+
+        my %hash;
+        my $tvi = find_first_section();
+        while ($tvi < @typevalue) {
+            my $start = find_starting_index($tvi);
+            my $end = find_ending_index($tvi);
+            my $exclude = 0;
+            my $i;
+
+            #Do not match excluded file patterns
 
-        if (!$exclude) {
             for ($i = $start; $i < $end; $i++) {
                 my $line = $typevalue[$i];
                 if ($line =~ m/^(\C):\s*(.*)/) {
                     my $type = $1;
                     my $value = $2;
-                    if ($type eq 'F') {
+                    if ($type eq 'X') {
                         if (file_match_pattern($file, $value)) {
-                            my $value_pd = ($value =~ tr@/@@);
-                            my $file_pd = ($file  =~ tr@/@@);
-                            $value_pd++ if (substr($value,-1,1) ne "/");
-                            if ($pattern_depth == 0 ||
-                                (($file_pd - $value_pd) < $pattern_depth)) {
-                                $hash{$tvi} = $value_pd;
+                            $exclude = 1;
+                            last;
+                        }
+                    }
+                }
+            }
+
+            if (!$exclude) {
+                for ($i = $start; $i < $end; $i++) {
+                    my $line = $typevalue[$i];
+                    if ($line =~ m/^(\C):\s*(.*)/) {
+                        my $type = $1;
+                        my $value = $2;
+                        if ($type eq 'F') {
+                            if (file_match_pattern($file, $value)) {
+                                my $value_pd = ($value =~ tr@/@@);
+                                my $file_pd = ($file  =~ tr@/@@);
+                                $value_pd++ if (substr($value,-1,1) ne "/");
+                                $value_pd = -1 if ($value =~ /^\.\*/);
+                                if ($value_pd >= $file_pd) {
+                                    $exact_pattern_match_hash{$file} = 1;
+                                }
+                                if ($pattern_depth == 0 ||
+                                    (($file_pd - $value_pd) < $pattern_depth)) {
+                                    $hash{$tvi} = $value_pd;
+                                }
                             }
                         }
                     }
                 }
             }
+            $tvi = $end + 1;
         }
 
-        $tvi = $end + 1;
-    }
-
-    foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
-        add_categories($line);
+        foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
+            add_categories($line);
             if ($sections) {
                 my $i;
                 my $start = find_starting_index($line);
@@ -435,80 +590,71 @@ foreach my $file (@files) {
                 }
                 print("\n");
             }
+        }
     }
 
-    if ($email && $email_git) {
-        vcs_file_signoffs($file);
+    if ($keywords) {
+        @keyword_tvi = sort_and_uniq(@keyword_tvi);
+        foreach my $line (@keyword_tvi) {
+            add_categories($line);
+        }
     }
 
-    if ($email && $email_git_blame) {
-        vcs_file_blame($file);
+    foreach my $email (@email_to, @list_to) {
+        $email->[0] = deduplicate_email($email->[0]);
     }
-}
 
-if ($keywords) {
-    @keyword_tvi = sort_and_uniq(@keyword_tvi);
-    foreach my $line (@keyword_tvi) {
-        add_categories($line);
+    foreach my $file (@files) {
+        if ($email &&
+            ($email_git || ($email_git_fallback &&
+                            !$exact_pattern_match_hash{$file}))) {
+            vcs_file_signoffs($file);
+        }
+        if ($email && $email_git_blame) {
+            vcs_file_blame($file);
+        }
     }
-}
 
-if ($email) {
-    foreach my $chief (@penguin_chief) {
-        if ($chief =~ m/^(.*):(.*)/) {
-            my $email_address;
+    if ($email) {
+        foreach my $chief (@penguin_chief) {
+            if ($chief =~ m/^(.*):(.*)/) {
+                my $email_address;
 
-            $email_address = format_email($1, $2, $email_usename);
-            if ($email_git_penguin_chiefs) {
-                push(@email_to, [$email_address, 'chief penguin']);
-            } else {
-                @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
+                $email_address = format_email($1, $2, $email_usename);
+                if ($email_git_penguin_chiefs) {
+                    push(@email_to, [$email_address, 'chief penguin']);
+                } else {
+                    @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
+                }
             }
         }
-    }
 
-    foreach my $email (@file_emails) {
-        my ($name, $address) = parse_email($email);
+        foreach my $email (@file_emails) {
+            my ($name, $address) = parse_email($email);
 
-        my $tmp_email = format_email($name, $address, $email_usename);
-        push_email_address($tmp_email, '');
-        add_role($tmp_email, 'in file');
+            my $tmp_email = format_email($name, $address, $email_usename);
+            push_email_address($tmp_email, '');
+            add_role($tmp_email, 'in file');
+        }
     }
-}
 
-if ($email || $email_list) {
     my @to = ();
-    if ($email) {
-        @to = (@to, @email_to);
-    }
-    if ($email_list) {
-        @to = (@to, @list_to);
+    if ($email || $email_list) {
+        if ($email) {
+            @to = (@to, @email_to);
+        }
+        if ($email_list) {
+            @to = (@to, @list_to);
+        }
     }
-    output(merge_email(@to));
-}
-
-if ($scm) {
-    @scm = uniq(@scm);
-    output(@scm);
-}
-
-if ($status) {
-    @status = uniq(@status);
-    output(@status);
-}
 
-if ($subsystem) {
-    @subsystem = uniq(@subsystem);
-    output(@subsystem);
-}
+    if ($interactive) {
+        @to = interactive_get_maintainers(\@to);
+    }
 
-if ($web) {
-    @web = uniq(@web);
-    output(@web);
+    return @to;
 }
 
-exit($exit);
-
 sub file_match_pattern {
     my ($file, $pattern) = @_;
     if (substr($pattern, -1) eq "/") {
@@ -537,7 +683,8 @@ MAINTAINER field selection options:
   --email => print email address(es) if any
     --git => include recent git \*-by: signers
     --git-all-signature-types => include signers regardless of signature type
-        or use only ${signaturePattern} signers (default: $email_git_all_signature_types)
+        or use only ${signature_pattern} signers (default: $email_git_all_signature_types)
+    --git-fallback => use git when no exact MAINTAINERS pattern (default: $email_git_fallback)
     --git-chief-penguins => include ${penguin_chiefs}
     --git-min-signatures => number of signatures required (default: $email_git_min_signatures)
     --git-max-maintainers => maximum maintainers to add (default: $email_git_max_maintainers)
@@ -545,6 +692,7 @@ MAINTAINER field selection options:
     --git-blame => use git blame to find modified commits for patch or file
     --git-since => git history to use (default: $email_git_since)
     --hg-since => hg history to use (default: $email_hg_since)
+    --interactive => display a menu (mostly useful if used with the --git option)
     --m => include maintainer(s) if any
     --n => include name 'Full Name <addr\@domain.tld>'
     --l => include list(s) if any
@@ -565,8 +713,9 @@ Output type options:
 
 Other options:
   --pattern-depth => Number of pattern directory traversals (default: 0 (all))
-  --keywords => scan patch for keywords (default: 1 (on))
-  --sections => print the entire subsystem sections with pattern matches
+  --keywords => scan patch for keywords (default: $keywords)
+  --sections => print all of the subsystem sections with pattern matches
+  --mailmap => use .mailmap file (default: $email_use_mailmap)
   --version => show version
   --help => show this help information
 
@@ -606,30 +755,30 @@ EOT
 }
 
 sub top_of_kernel_tree {
-        my ($lk_path) = @_;
+    my ($lk_path) = @_;
 
-        if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
-            $lk_path .= "/";
-        }
-        if (   (-f "${lk_path}COPYING")
-            && (-f "${lk_path}CREDITS")
-            && (-f "${lk_path}Kbuild")
-            && (-f "${lk_path}MAINTAINERS")
-            && (-f "${lk_path}Makefile")
-            && (-f "${lk_path}README")
-            && (-d "${lk_path}Documentation")
-            && (-d "${lk_path}arch")
-            && (-d "${lk_path}include")
-            && (-d "${lk_path}drivers")
-            && (-d "${lk_path}fs")
-            && (-d "${lk_path}init")
-            && (-d "${lk_path}ipc")
-            && (-d "${lk_path}kernel")
-            && (-d "${lk_path}lib")
-            && (-d "${lk_path}scripts")) {
-                return 1;
-        }
-        return 0;
+    if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
+        $lk_path .= "/";
+    }
+    if (   (-f "${lk_path}COPYING")
+        && (-f "${lk_path}CREDITS")
+        && (-f "${lk_path}Kbuild")
+        && (-f "${lk_path}MAINTAINERS")
+        && (-f "${lk_path}Makefile")
+        && (-f "${lk_path}README")
+        && (-d "${lk_path}Documentation")
+        && (-d "${lk_path}arch")
+        && (-d "${lk_path}include")
+        && (-d "${lk_path}drivers")
+        && (-d "${lk_path}fs")
+        && (-d "${lk_path}init")
+        && (-d "${lk_path}ipc")
+        && (-d "${lk_path}kernel")
+        && (-d "${lk_path}lib")
+        && (-d "${lk_path}scripts")) {
+        return 1;
+    }
+    return 0;
 }
 
 sub parse_email {
@@ -821,11 +970,19 @@ sub add_categories {
                 }
                 if ($list_additional =~ m/subscribers-only/) {
                     if ($email_subscriber_list) {
-                        push(@list_to, [$list_address, "subscriber list${list_role}"]);
+                        if (!$hash_list_to{lc($list_address)}) {
+                            $hash_list_to{lc($list_address)} = 1;
+                            push(@list_to, [$list_address,
+                                            "subscriber list${list_role}"]);
+                        }
                     }
                 } else {
                     if ($email_list) {
-                        push(@list_to, [$list_address, "open list${list_role}"]);
+                        if (!$hash_list_to{lc($list_address)}) {
+                            $hash_list_to{lc($list_address)} = 1;
+                            push(@list_to, [$list_address,
+                                            "open list${list_role}"]);
+                        }
                     }
                 }
             } elsif ($ptype eq "M") {
@@ -856,15 +1013,12 @@ sub add_categories {
     }
 }
 
-my %email_hash_name;
-my %email_hash_address;
-
 sub email_inuse {
     my ($name, $address) = @_;
 
     return 1 if (($name eq "") && ($address eq ""));
-    return 1 if (($name ne "") && exists($email_hash_name{$name}));
-    return 1 if (($address ne "") && exists($email_hash_address{$address}));
+    return 1 if (($name ne "") && exists($email_hash_name{lc($name)}));
+    return 1 if (($address ne "") && exists($email_hash_address{lc($address)}));
 
     return 0;
 }
@@ -882,8 +1036,8 @@ sub push_email_address {
         push(@email_to, [format_email($name, $address, $email_usename), $role]);
     } elsif (!email_inuse($name, $address)) {
         push(@email_to, [format_email($name, $address, $email_usename), $role]);
-        $email_hash_name{$name}++;
-        $email_hash_address{$address}++;
+        $email_hash_name{lc($name)}++ if ($name ne "");
+        $email_hash_address{lc($address)}++;
     }
 
     return 1;
@@ -952,30 +1106,69 @@ sub which {
     return "";
 }
 
-sub mailmap {
-    my (@lines) = @_;
-    my %hash;
+sub which_conf {
+    my ($conf) = @_;
 
-    foreach my $line (@lines) {
-        my ($name, $address) = parse_email($line);
-        if (!exists($hash{$name})) {
-            $hash{$name} = $address;
-        } elsif ($address ne $hash{$name}) {
-            $address = $hash{$name};
-            $line = format_email($name, $address, $email_usename);
+    foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
+        if (-e "$path/$conf") {
+            return "$path/$conf";
         }
-        if (exists($mailmap{$name})) {
-            my $obj = $mailmap{$name};
-            foreach my $map_address (@$obj) {
-                if (($map_address eq $address) &&
-                    ($map_address ne $hash{$name})) {
-                    $line = format_email($name, $hash{$name}, $email_usename);
-                }
-            }
+    }
+
+    return "";
+}
+
+sub mailmap_email {
+    my ($line) = @_;
+
+    my ($name, $address) = parse_email($line);
+    my $email = format_email($name, $address, 1);
+    my $real_name = $name;
+    my $real_address = $address;
+
+    if (exists $mailmap->{names}->{$email} ||
+        exists $mailmap->{addresses}->{$email}) {
+        if (exists $mailmap->{names}->{$email}) {
+            $real_name = $mailmap->{names}->{$email};
+        }
+        if (exists $mailmap->{addresses}->{$email}) {
+            $real_address = $mailmap->{addresses}->{$email};
+        }
+    } else {
+        if (exists $mailmap->{names}->{$address}) {
+            $real_name = $mailmap->{names}->{$address};
+        }
+        if (exists $mailmap->{addresses}->{$address}) {
+            $real_address = $mailmap->{addresses}->{$address};
         }
     }
+    return format_email($real_name, $real_address, 1);
+}
 
-    return @lines;
+sub mailmap {
+    my (@addresses) = @_;
+
+    my @mapped_emails = ();
+    foreach my $line (@addresses) {
+        push(@mapped_emails, mailmap_email($line));
+    }
+    merge_by_realname(@mapped_emails) if ($email_use_mailmap);
+    return @mapped_emails;
+}
+
+sub merge_by_realname {
+    my %address_map;
+    my (@emails) = @_;
+
+    foreach my $email (@emails) {
+        my ($name, $address) = parse_email($email);
+        if (exists $address_map{$name}) {
+            $address = $address_map{$name};
+            $email = format_email($name, $address, 1);
+        } else {
+            $address_map{$name} = $address;
+        }
+    }
 }
 
 sub git_execute_cmd {
@@ -999,10 +1192,30 @@ sub hg_execute_cmd {
     return @lines;
 }
 
+sub extract_formatted_signatures {
+    my (@signature_lines) = @_;
+
+    my @type = @signature_lines;
+
+    s/\s*(.*):.*/$1/ for (@type);
+
+    # cut -f2- -d":"
+    s/\s*.*:\s*(.+)\s*/$1/ for (@signature_lines);
+
+## Reformat email addresses (with names) to avoid badly written signatures
+
+    foreach my $signer (@signature_lines) {
+        $signer = deduplicate_email($signer);
+    }
+
+    return (\@type, \@signature_lines);
+}
+
 sub vcs_find_signers {
     my ($cmd) = @_;
-    my @lines = ();
     my $commits;
+    my @lines = ();
+    my @signatures = ();
 
     @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
 
@@ -1010,21 +1223,48 @@ sub vcs_find_signers {
 
     $commits = grep(/$pattern/, @lines);        # of commits
 
-    @lines = grep(/^[ \t]*${signaturePattern}.*\@.*$/, @lines);
+    @signatures = grep(/^[ \t]*${signature_pattern}.*\@.*$/, @lines);
+
+    return (0, @signatures) if !@signatures;
+
+    save_commits_by_author(@lines) if ($interactive);
+    save_commits_by_signer(@lines) if ($interactive);
+
+    if (!$email_git_penguin_chiefs) {
+        @signatures = grep(!/${penguin_chiefs}/i, @signatures);
+    }
+
+    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
+
+    return ($commits, @$signers_ref);
+}
+
+sub vcs_find_author {
+    my ($cmd) = @_;
+    my @lines = ();
+
+    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
+
     if (!$email_git_penguin_chiefs) {
         @lines = grep(!/${penguin_chiefs}/i, @lines);
     }
-    # cut -f2- -d":"
-    s/.*:\s*(.+)\s*/$1/ for (@lines);
 
-## Reformat email addresses (with names) to avoid badly written signatures
+    return @lines if !@lines;
 
+    my @authors = ();
     foreach my $line (@lines) {
-        my ($name, $address) = parse_email($line);
-        $line = format_email($name, $address, 1);
+        if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
+            my $author = $1;
+            my ($name, $address) = parse_email($author);
+            $author = format_email($name, $address, 1);
+            push(@authors, $author);
+        }
     }
 
-    return ($commits, @lines);
+    save_commits_by_author(@lines) if ($interactive);
+    save_commits_by_signer(@lines) if ($interactive);
+
+    return @authors;
 }
 
 sub vcs_save_commits {
@@ -1084,6 +1324,10 @@ sub vcs_blame {
         @commits = vcs_save_commits($cmd);
     }
 
+    foreach my $commit (@commits) {
+        $commit =~ s/^\^//g;
+    }
+
     return @commits;
 }
 
@@ -1092,7 +1336,7 @@ sub vcs_exists {
     %VCS_cmds = %VCS_cmds_git;
     return 1 if eval $VCS_cmds{"available"};
     %VCS_cmds = %VCS_cmds_hg;
-    return 1 if eval $VCS_cmds{"available"};
+    return 2 if eval $VCS_cmds{"available"};
     %VCS_cmds = ();
     if (!$printed_novcs) {
         warn("$P: No supported VCS found.  Add --nogit to options?\n");
@@ -1104,6 +1348,405 @@ sub vcs_exists {
     return 0;
 }
 
+sub vcs_is_git {
+    vcs_exists();
+    return $vcs_used == 1;
+}
+
+sub vcs_is_hg {
+    return $vcs_used == 2;
+}
+
+sub interactive_get_maintainers {
+    my ($list_ref) = @_;
+    my @list = @$list_ref;
+
+    vcs_exists();
+
+    my %selected;
+    my %authored;
+    my %signed;
+    my $count = 0;
+    my $maintained = 0;
+    foreach my $entry (@list) {
+        $maintained = 1 if ($entry->[1] =~ /^(maintainer|supporter)/i);
+        $selected{$count} = 1;
+        $authored{$count} = 0;
+        $signed{$count} = 0;
+        $count++;
+    }
+
+    #menu loop
+    my $done = 0;
+    my $print_options = 0;
+    my $redraw = 1;
+    while (!$done) {
+        $count = 0;
+        if ($redraw) {
+            printf STDERR "\n%1s %2s %-65s",
+                          "*", "#", "email/list and role:stats";
+            if ($email_git ||
+                ($email_git_fallback && !$maintained) ||
+                $email_git_blame) {
+                print STDERR "auth sign";
+            }
+            print STDERR "\n";
+            foreach my $entry (@list) {
+                my $email = $entry->[0];
+                my $role = $entry->[1];
+                my $sel = "";
+                $sel = "*" if ($selected{$count});
+                my $commit_author = $commit_author_hash{$email};
+                my $commit_signer = $commit_signer_hash{$email};
+                my $authored = 0;
+                my $signed = 0;
+                $authored++ for (@{$commit_author});
+                $signed++ for (@{$commit_signer});
+                printf STDERR "%1s %2d %-65s", $sel, $count + 1, $email;
+                printf STDERR "%4d %4d", $authored, $signed
+                    if ($authored > 0 || $signed > 0);
+                printf STDERR "\n     %s\n", $role;
+                if ($authored{$count}) {
+                    my $commit_author = $commit_author_hash{$email};
+                    foreach my $ref (@{$commit_author}) {
+                        print STDERR "     Author: @{$ref}[1]\n";
+                    }
+                }
+                if ($signed{$count}) {
+                    my $commit_signer = $commit_signer_hash{$email};
+                    foreach my $ref (@{$commit_signer}) {
+                        print STDERR "     @{$ref}[2]: @{$ref}[1]\n";
+                    }
+                }
+
+                $count++;
+            }
+        }
+        my $date_ref = \$email_git_since;
+        $date_ref = \$email_hg_since if (vcs_is_hg());
+        if ($print_options) {
+            $print_options = 0;
+            if (vcs_exists()) {
+                print STDERR <<EOT
+
+Version Control options:
+g  use git history      [$email_git]
+gf use git-fallback     [$email_git_fallback]
+b  use git blame        [$email_git_blame]
+bs use blame signatures [$email_git_blame_signatures]
+c# minimum commits      [$email_git_min_signatures]
+%# min percent          [$email_git_min_percent]
+d# history to use       [$$date_ref]
+x# max maintainers      [$email_git_max_maintainers]
+t  all signature types  [$email_git_all_signature_types]
+m  use .mailmap         [$email_use_mailmap]
+EOT
+            }
+            print STDERR <<EOT
+
+Additional options:
+0  toggle all
+tm toggle maintainers
+tg toggle git entries
+tl toggle open list entries
+ts toggle subscriber list entries
+f  emails in file       [$file_emails]
+k  keywords in file     [$keywords]
+r  remove duplicates    [$email_remove_duplicates]
+p# pattern match depth  [$pattern_depth]
+EOT
+        }
+        print STDERR
+"\n#(toggle), A#(author), S#(signed) *(all), ^(none), O(options), Y(approve): ";
+
+        my $input = <STDIN>;
+        chomp($input);
+
+        $redraw = 1;
+        my $rerun = 0;
+        my @wish = split(/[, ]+/, $input);
+        foreach my $nr (@wish) {
+            $nr = lc($nr);
+            my $sel = substr($nr, 0, 1);
+            my $str = substr($nr, 1);
+            my $val = 0;
+            $val = $1 if $str =~ /^(\d+)$/;
+
+            if ($sel eq "y") {
+                $interactive = 0;
+                $done = 1;
+                $output_rolestats = 0;
+                $output_roles = 0;
+                last;
+            } elsif ($nr =~ /^\d+$/ && $nr > 0 && $nr <= $count) {
+                $selected{$nr - 1} = !$selected{$nr - 1};
+            } elsif ($sel eq "*" || $sel eq '^') {
+                my $toggle = 0;
+                $toggle = 1 if ($sel eq '*');
+                for (my $i = 0; $i < $count; $i++) {
+                    $selected{$i} = $toggle;
+                }
+            } elsif ($sel eq "0") {
+                for (my $i = 0; $i < $count; $i++) {
+                    $selected{$i} = !$selected{$i};
+                }
+            } elsif ($sel eq "t") {
+                if (lc($str) eq "m") {
+                    for (my $i = 0; $i < $count; $i++) {
+                        $selected{$i} = !$selected{$i}
+                            if ($list[$i]->[1] =~ /^(maintainer|supporter)/i);
+                    }
+                } elsif (lc($str) eq "g") {
+                    for (my $i = 0; $i < $count; $i++) {
+                        $selected{$i} = !$selected{$i}
+                            if ($list[$i]->[1] =~ /^(author|commit|signer)/i);
+                    }
+                } elsif (lc($str) eq "l") {
+                    for (my $i = 0; $i < $count; $i++) {
+                        $selected{$i} = !$selected{$i}
+                            if ($list[$i]->[1] =~ /^(open list)/i);
+                    }
+                } elsif (lc($str) eq "s") {
+                    for (my $i = 0; $i < $count; $i++) {
+                        $selected{$i} = !$selected{$i}
+                            if ($list[$i]->[1] =~ /^(subscriber list)/i);
+                    }
+                }
+            } elsif ($sel eq "a") {
+                if ($val > 0 && $val <= $count) {
+                    $authored{$val - 1} = !$authored{$val - 1};
+                } elsif ($str eq '*' || $str eq '^') {
+                    my $toggle = 0;
+                    $toggle = 1 if ($str eq '*');
+                    for (my $i = 0; $i < $count; $i++) {
+                        $authored{$i} = $toggle;
+                    }
+                }
+            } elsif ($sel eq "s") {
+                if ($val > 0 && $val <= $count) {
+                    $signed{$val - 1} = !$signed{$val - 1};
+                } elsif ($str eq '*' || $str eq '^') {
+                    my $toggle = 0;
+                    $toggle = 1 if ($str eq '*');
+                    for (my $i = 0; $i < $count; $i++) {
+                        $signed{$i} = $toggle;
+                    }
+                }
+            } elsif ($sel eq "o") {
+                $print_options = 1;
+                $redraw = 1;
+            } elsif ($sel eq "g") {
+                if ($str eq "f") {
+                    bool_invert(\$email_git_fallback);
+                } else {
+                    bool_invert(\$email_git);
+                }
+                $rerun = 1;
+            } elsif ($sel eq "b") {
+                if ($str eq "s") {
+                    bool_invert(\$email_git_blame_signatures);
+                } else {
+                    bool_invert(\$email_git_blame);
+                }
+                $rerun = 1;
+            } elsif ($sel eq "c") {
+                if ($val > 0) {
+                    $email_git_min_signatures = $val;
+                    $rerun = 1;
+                }
+            } elsif ($sel eq "x") {
+                if ($val > 0) {
+                    $email_git_max_maintainers = $val;
+                    $rerun = 1;
+                }
+            } elsif ($sel eq "%") {
+                if ($str ne "" && $val >= 0) {
+                    $email_git_min_percent = $val;
+                    $rerun = 1;
+                }
+            } elsif ($sel eq "d") {
+                if (vcs_is_git()) {
+                    $email_git_since = $str;
+                } elsif (vcs_is_hg()) {
+                    $email_hg_since = $str;
+                }
+                $rerun = 1;
+            } elsif ($sel eq "t") {
+                bool_invert(\$email_git_all_signature_types);
+                $rerun = 1;
+            } elsif ($sel eq "f") {
+                bool_invert(\$file_emails);
+                $rerun = 1;
+            } elsif ($sel eq "r") {
+                bool_invert(\$email_remove_duplicates);
+                $rerun = 1;
+            } elsif ($sel eq "m") {
+                bool_invert(\$email_use_mailmap);
+                read_mailmap();
+                $rerun = 1;
+            } elsif ($sel eq "k") {
+                bool_invert(\$keywords);
+                $rerun = 1;
+            } elsif ($sel eq "p") {
+                if ($str ne "" && $val >= 0) {
+                    $pattern_depth = $val;
+                    $rerun = 1;
+                }
+            } elsif ($sel eq "h" || $sel eq "?") {
+                print STDERR <<EOT
+
+Interactive mode allows you to select the various maintainers, submitters,
+commit signers and mailing lists that could be CC'd on a patch.
+
+Any *'d entry is selected.
+
+If you have git or hg installed, you can choose to summarize the commit
+history of files in the patch.  Also, each line of the current file can
+be matched to its commit author and that commits signers with blame.
+
+Various knobs exist to control the length of time for active commit
+tracking, the maximum number of commit authors and signers to add,
+and such.
+
+Enter selections at the prompt until you are satisfied that the selected
+maintainers are appropriate.  You may enter multiple selections separated
+by either commas or spaces.
+
+EOT
+            } else {
+                print STDERR "invalid option: '$nr'\n";
+                $redraw = 0;
+            }
+        }
+        if ($rerun) {
+            print STDERR "git-blame can be very slow, please have patience..."
+                if ($email_git_blame);
+            goto &get_maintainers;
+        }
+    }
+
+    #drop not selected entries
+    $count = 0;
+    my @new_emailto = ();
+    foreach my $entry (@list) {
+        if ($selected{$count}) {
+            push(@new_emailto, $list[$count]);
+        }
+        $count++;
+    }
+    return @new_emailto;
+}
+
+sub bool_invert {
+    my ($bool_ref) = @_;
+
+    if ($$bool_ref) {
+        $$bool_ref = 0;
+    } else {
+        $$bool_ref = 1;
+    }
+}
+
+sub deduplicate_email {
+    my ($email) = @_;
+
+    my $matched = 0;
+    my ($name, $address) = parse_email($email);
+    $email = format_email($name, $address, 1);
+    $email = mailmap_email($email);
+
+    return $email if (!$email_remove_duplicates);
+
+    ($name, $address) = parse_email($email);
+
+    if ($name ne "" && $deduplicate_name_hash{lc($name)}) {
+        $name = $deduplicate_name_hash{lc($name)}->[0];
+        $address = $deduplicate_name_hash{lc($name)}->[1];
+        $matched = 1;
+    } elsif ($deduplicate_address_hash{lc($address)}) {
+        $name = $deduplicate_address_hash{lc($address)}->[0];
+        $address = $deduplicate_address_hash{lc($address)}->[1];
+        $matched = 1;
+    }
+    if (!$matched) {
+        $deduplicate_name_hash{lc($name)} = [ $name, $address ];
+        $deduplicate_address_hash{lc($address)} = [ $name, $address ];
+    }
+    $email = format_email($name, $address, 1);
+    $email = mailmap_email($email);
+    return $email;
+}
+
+sub save_commits_by_author {
+    my (@lines) = @_;
+
+    my @authors = ();
+    my @commits = ();
+    my @subjects = ();
+
+    foreach my $line (@lines) {
+        if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
+            my $author = $1;
+            $author = deduplicate_email($author);
+            push(@authors, $author);
+        }
+        push(@commits, $1) if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
+        push(@subjects, $1) if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
+    }
+
+    for (my $i = 0; $i < @authors; $i++) {
+        my $exists = 0;
+        foreach my $ref(@{$commit_author_hash{$authors[$i]}}) {
+            if (@{$ref}[0] eq $commits[$i] &&
+                @{$ref}[1] eq $subjects[$i]) {
+                $exists = 1;
+                last;
+            }
+        }
+        if (!$exists) {
+            push(@{$commit_author_hash{$authors[$i]}},
+                 [ ($commits[$i], $subjects[$i]) ]);
+        }
+    }
+}
+
+sub save_commits_by_signer {
+    my (@lines) = @_;
+
+    my $commit = "";
+    my $subject = "";
+
+    foreach my $line (@lines) {
+        $commit = $1 if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
+        $subject = $1 if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
+        if ($line =~ /^[ \t]*${signature_pattern}.*\@.*$/) {
+            my @signatures = ($line);
+            my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
+            my @types = @$types_ref;
+            my @signers = @$signers_ref;
+
+            my $type = $types[0];
+            my $signer = $signers[0];
+
+            $signer = deduplicate_email($signer);
+
+            my $exists = 0;
+            foreach my $ref(@{$commit_signer_hash{$signer}}) {
+                if (@{$ref}[0] eq $commit &&
+                    @{$ref}[1] eq $subject &&
+                    @{$ref}[2] eq $type) {
+                    $exists = 1;
+                    last;
+                }
+            }
+            if (!$exists) {
+                push(@{$commit_signer_hash{$signer}},
+                     [ ($commit, $subject, $type) ]);
+            }
+        }
+    }
+}
+
 sub vcs_assign {
     my ($role, $divisor, @lines) = @_;
 
@@ -1117,9 +1760,9 @@ sub vcs_assign {
         $divisor = 1;
     }
 
-    if ($email_remove_duplicates) {
-        @lines = mailmap(@lines);
-    }
+    @lines = mailmap(@lines);
+
+    return if (@lines <= 0);
 
     @lines = sort(@lines);
 
@@ -1152,12 +1795,18 @@ sub vcs_file_signoffs {
     my @signers = ();
     my $commits;
 
-    return if (!vcs_exists());
+    $vcs_used = vcs_exists();
+    return if (!$vcs_used);
 
     my $cmd = $VCS_cmds{"find_signers_cmd"};
     $cmd =~ s/(\$\w+)/$1/eeg;           # interpolate $cmd
 
     ($commits, @signers) = vcs_find_signers($cmd);
+
+    foreach my $signer (@signers) {
+        $signer = deduplicate_email($signer);
+    }
+
     vcs_assign("commit_signer", $commits, @signers);
 }
 
@@ -1165,29 +1814,114 @@ sub vcs_file_blame {
     my ($file) = @_;
 
     my @signers = ();
+    my @all_commits = ();
     my @commits = ();
     my $total_commits;
+    my $total_lines;
 
-    return if (!vcs_exists());
+    $vcs_used = vcs_exists();
+    return if (!$vcs_used);
 
-    @commits = vcs_blame($file);
-    @commits = uniq(@commits);
+    @all_commits = vcs_blame($file);
+    @commits = uniq(@all_commits);
     $total_commits = @commits;
+    $total_lines = @all_commits;
 
-    foreach my $commit (@commits) {
-        my $commit_count;
-        my @commit_signers = ();
+    if ($email_git_blame_signatures) {
+        if (vcs_is_hg()) {
+            my $commit_count;
+            my @commit_signers = ();
+            my $commit = join(" -r ", @commits);
+            my $cmd;
+
+            $cmd = $VCS_cmds{"find_commit_signers_cmd"};
+            $cmd =~ s/(\$\w+)/$1/eeg;   #substitute variables in $cmd
+
+            ($commit_count, @commit_signers) = vcs_find_signers($cmd);
+
+            push(@signers, @commit_signers);
+        } else {
+            foreach my $commit (@commits) {
+                my $commit_count;
+                my @commit_signers = ();
+                my $cmd;
 
-        my $cmd = $VCS_cmds{"find_commit_signers_cmd"};
-        $cmd =~ s/(\$\w+)/$1/eeg;       #interpolate $cmd
+                $cmd = $VCS_cmds{"find_commit_signers_cmd"};
+                $cmd =~ s/(\$\w+)/$1/eeg;       #substitute variables in $cmd
 
-        ($commit_count, @commit_signers) = vcs_find_signers($cmd);
-        push(@signers, @commit_signers);
+                ($commit_count, @commit_signers) = vcs_find_signers($cmd);
+
+                push(@signers, @commit_signers);
+            }
+        }
     }
 
     if ($from_filename) {
+        if ($output_rolestats) {
+            my @blame_signers;
+            if (vcs_is_hg()) {{         # Double brace for last exit
+                my $commit_count;
+                my @commit_signers = ();
+                @commits = uniq(@commits);
+                @commits = sort(@commits);
+                my $commit = join(" -r ", @commits);
+                my $cmd;
+
+                $cmd = $VCS_cmds{"find_commit_author_cmd"};
+                $cmd =~ s/(\$\w+)/$1/eeg;       #substitute variables in $cmd
+
+                my @lines = ();
+
+                @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
+
+                if (!$email_git_penguin_chiefs) {
+                    @lines = grep(!/${penguin_chiefs}/i, @lines);
+                }
+
+                last if !@lines;
+
+                my @authors = ();
+                foreach my $line (@lines) {
+                    if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
+                        my $author = $1;
+                        $author = deduplicate_email($author);
+                        push(@authors, $author);
+                    }
+                }
+
+                save_commits_by_author(@lines) if ($interactive);
+                save_commits_by_signer(@lines) if ($interactive);
+
+                push(@signers, @authors);
+            }}
+            else {
+                foreach my $commit (@commits) {
+                    my $i;
+                    my $cmd = $VCS_cmds{"find_commit_author_cmd"};
+                    $cmd =~ s/(\$\w+)/$1/eeg;   #interpolate $cmd
+                    my @author = vcs_find_author($cmd);
+                    next if !@author;
+
+                    my $formatted_author = deduplicate_email($author[0]);
+
+                    my $count = grep(/$commit/, @all_commits);
+                    for ($i = 0; $i < $count ; $i++) {
+                        push(@blame_signers, $formatted_author);
+                    }
+                }
+            }
+            if (@blame_signers) {
+                vcs_assign("authored lines", $total_lines, @blame_signers);
+            }
+        }
+        foreach my $signer (@signers) {
+            $signer = deduplicate_email($signer);
+        }
         vcs_assign("commits", $total_commits, @signers);
     } else {
+        foreach my $signer (@signers) {
+            $signer = deduplicate_email($signer);
+        }
         vcs_assign("modified commits", $total_commits, @signers);
     }
 }