193 files changed, 4525 insertions, 1704 deletions

diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt
index dfab71848dc8..5cc699ba5453 100644
--- a/Documentation/acpi/apei/einj.txt
+++ b/Documentation/acpi/apei/einj.txt
@@ -48,12 +48,19 @@ directory apei/einj. The following files are provided.
 - param1
   This file is used to set the first error parameter value. Effect of
   parameter depends on error_type specified. For memory error, this is
-  physical memory address.
+  physical memory address.  Only available if param_extension module
+  parameter is specified.
 
 - param2
   This file is used to set the second error parameter value. Effect of
   parameter depends on error_type specified. For memory error, this is
-  physical memory address mask.
+  physical memory address mask.  Only available if param_extension
+  module parameter is specified.
+
+Injecting parameter support is a BIOS version specific extension, that
+is, it only works on some BIOS version.  If you want to use it, please
+make sure your BIOS version has the proper support and specify
+"param_extension=y" in module parameter.
 
 For more information about EINJ, please refer to ACPI specification
 version 4.0, section 17.5.
diff --git a/Documentation/devicetree/bindings/gpio/gpio_keys.txt b/Documentation/devicetree/bindings/gpio/gpio_keys.txt
index 7190c99d7611..5c2c02140a62 100644
--- a/Documentation/devicetree/bindings/gpio/gpio_keys.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio_keys.txt
@@ -10,7 +10,7 @@ Optional properties:
 Each button (key) is represented as a sub-node of "gpio-keys":
 Subnode properties:
 
-        - gpios: OF devcie-tree gpio specificatin.
+        - gpios: OF device-tree gpio specification.
         - label: Descriptive name of the key.
         - linux,code: Keycode to emit.
 
diff --git a/Documentation/devicetree/bindings/input/fsl-mma8450.txt b/Documentation/devicetree/bindings/input/fsl-mma8450.txt
new file mode 100644
index 000000000000..a00c94ccbdee
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/fsl-mma8450.txt
@@ -0,0 +1,11 @@
+* Freescale MMA8450 3-Axis Accelerometer
+
+Required properties:
+- compatible : "fsl,mma8450".
+
+Example:
+
+accelerometer: mma8450@1c {
+        compatible = "fsl,mma8450";
+        reg = <0x1c>;
+};
diff --git a/Documentation/fault-injection/fault-injection.txt b/Documentation/fault-injection/fault-injection.txt
index 7be15e44d481..82a5d250d75e 100644
--- a/Documentation/fault-injection/fault-injection.txt
+++ b/Documentation/fault-injection/fault-injection.txt
@@ -143,8 +143,7 @@ o provide a way to configure fault attributes
   failslab, fail_page_alloc, and fail_make_request use this way.
   Helper functions:
 
-        init_fault_attr_dentries(entries, attr, name);
-        void cleanup_fault_attr_dentries(entries);
+        fault_create_debugfs_attr(name, parent, attr);
 
 - module parameters
 
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index ea0bace0124a..43f48098220d 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -296,15 +296,6 @@ Who:	Ravikiran Thirumalai <kiran@scalex86.org>
 
 ---------------------------
 
-What:   CONFIG_THERMAL_HWMON
-When:   January 2009
-Why:    This option was introduced just to allow older lm-sensors userspace
-        to keep working over the upgrade to 2.6.26. At the scheduled time of
-        removal fixed lm-sensors (2.x or 3.x) should be readily available.
-Who:    Rene Herman <rene.herman@gmail.com>
-
----------------------------
-
 What:   Code that is now under CONFIG_WIRELESS_EXT_SYSFS
         (in net/core/net-sysfs.c)
 When:   After the only user (hal) has seen a release with the patches
diff --git a/Documentation/frv/booting.txt b/Documentation/frv/booting.txt
index ace200b7c214..37c4d84a0e57 100644
--- a/Documentation/frv/booting.txt
+++ b/Documentation/frv/booting.txt
@@ -106,13 +106,20 @@ separated by spaces:
       To use the first on-chip serial port at baud rate 115200, no parity, 8
       bits, and no flow control.
 
-  (*) root=/dev/<xxxx>
+  (*) root=<xxxx>
 
-      This specifies the device upon which the root filesystem resides. For
-      example:
+      This specifies the device upon which the root filesystem resides. It
+      may be specified by major and minor number, device path, or even
+      partition uuid, if supported.  For example:
 
         /dev/nfs        NFS root filesystem
         /dev/mtdblock3  Fourth RedBoot partition on the System Flash
+        PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=1
+                first partition after the partition with the given UUID
+        253:0           Device with major 253 and minor 0
+
+      Authoritative information can be found in
+      "Documentation/kernel-parameters.txt".
 
   (*) rw
 
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 72ba8d51dbc1..845a191004b1 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -292,6 +292,7 @@ Code  Seq#(hex)	Include File		Comments
                                         <mailto:buk@buks.ipn.de>
 0xA0    all     linux/sdp/sdp.h         Industrial Device Project
                                         <mailto:kenji@bitgate.com>
+0xA2    00-0F   arch/tile/include/asm/hardwall.h
 0xA3    80-8F   Port ACL                in development:
                                         <mailto:tlewis@mindspring.com>
 0xA3    90-9F   linux/dtlk.h
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 26a83743af19..e279b7242912 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -163,6 +163,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
                         See also Documentation/power/pm.txt, pci=noacpi
 
+        acpi_rsdp=      [ACPI,EFI,KEXEC]
+                        Pass the RSDP address to the kernel, mostly used
+                        on machines running EFI runtime service to boot the
+                        second kernel for kdump.
+
         acpi_apic_instance=     [ACPI, IOAPIC]
                         Format: <int>
                         2: use 2nd APIC table, if available
@@ -546,6 +551,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         /proc/<pid>/coredump_filter.
                         See also Documentation/filesystems/proc.txt.
 
+        cpuidle.off=1   [CPU_IDLE]
+                        disable the cpuidle sub-system
+
         cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver
                         Format:
                         <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
@@ -2240,6 +2248,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         ro              [KNL] Mount root device read-only on boot
 
         root=           [KNL] Root filesystem
+                        See name_to_dev_t comment in init/do_mounts.c.
 
         rootdelay=      [KNL] Delay (in seconds) to pause before attempting to
                         mount the root filesystem
diff --git a/Documentation/m68k/kernel-options.txt b/Documentation/m68k/kernel-options.txt
index c93bed66e25d..97d45f276fe6 100644
--- a/Documentation/m68k/kernel-options.txt
+++ b/Documentation/m68k/kernel-options.txt
@@ -129,6 +129,20 @@ decimal 11 is the major of SCSI CD-ROMs, and the minor 0 stands for
 the first of these. You can find out all valid major numbers by
 looking into include/linux/major.h.
 
+In addition to major and minor numbers, if the device containing your
+root partition uses a partition table format with unique partition
+identifiers, then you may use them.  For instance,
+"root=PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF".  It is also
+possible to reference another partition on the same device using a
+known partition UUID as the starting point.  For example,
+if partition 5 of the device has the UUID of
+00112233-4455-6677-8899-AABBCCDDEEFF then partition 3 may be found as
+follows:
+  PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=-2
+
+Authoritative information can be found in
+"Documentation/kernel-parameters.txt".
+
 
 2.2) ro, rw
 -----------
diff --git a/MAINTAINERS b/MAINTAINERS
index 0d2fcda465eb..07cfd8deaad5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3367,6 +3367,12 @@ F:	drivers/net/ixgb/
 F:      drivers/net/ixgbe/
 F:      drivers/net/ixgbevf/
 
+INTEL MRST PMU DRIVER
+M:      Len Brown <len.brown@intel.com>
+L:      linux-pm@lists.linux-foundation.org
+S:      Supported
+F:      arch/x86/platform/mrst/pmu.*
+
 INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
 L:      linux-wireless@vger.kernel.org
 S:      Orphan
@@ -6319,6 +6325,7 @@ F:	include/linux/sysv_fs.h
 TARGET SUBSYSTEM
 M:      Nicholas A. Bellinger <nab@linux-iscsi.org>
 L:      linux-scsi@vger.kernel.org
+L:      target-devel@vger.kernel.org
 L:      http://groups.google.com/group/linux-iscsi-target-dev
 W:      http://www.linux-iscsi.org
 T:      git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core-2.6.git master
diff --git a/arch/Kconfig b/arch/Kconfig
index 26b0e2397a57..4b0669cbb3b0 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -178,4 +178,7 @@ config HAVE_ARCH_MUTEX_CPU_RELAX
 config HAVE_RCU_TABLE_FREE
         bool
 
+config ARCH_HAVE_NMI_SAFE_CMPXCHG
+        bool
+
 source "kernel/gcov/Kconfig"
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index ca2da8da6e9c..60cde53d266c 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -14,6 +14,7 @@ config ALPHA
         select AUTO_IRQ_AFFINITY if SMP
         select GENERIC_IRQ_SHOW
         select ARCH_WANT_OPTIONAL_GPIOLIB
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
         help
           The Alpha is a 64-bit general-purpose processor designed and
           marketed by the Digital Equipment Corporation of blessed memory,
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 5e1e54197227..d7ee0d4c072d 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -30,6 +30,7 @@
 #include <linux/uaccess.h>
 #include <linux/random.h>
 #include <linux/hw_breakpoint.h>
+#include <linux/cpuidle.h>
 
 #include <asm/cacheflush.h>
 #include <asm/leds.h>
@@ -196,7 +197,8 @@ void cpu_idle(void)
                                 cpu_relax();
                         } else {
                                 stop_critical_timings();
-                                pm_idle();
+                                if (cpuidle_call_idle())
+                                        pm_idle();
                                 start_critical_timings();
                                 /*
                                  * This will eventually be removed - pm_idle
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index e9d689b7c833..197e96f70405 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -10,6 +10,7 @@ config AVR32
         select GENERIC_IRQ_PROBE
         select HARDIRQS_SW_RESEND
         select GENERIC_IRQ_SHOW
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
         help
           AVR32 is a high-performance 32-bit RISC microprocessor core,
           designed for cost-sensitive embedded applications, with particular
diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
index 850265373611..466af40c5822 100644
--- a/arch/cris/arch-v10/drivers/sync_serial.c
+++ b/arch/cris/arch-v10/drivers/sync_serial.c
@@ -158,7 +158,7 @@ static int sync_serial_open(struct inode *inode, struct file *file);
 static int sync_serial_release(struct inode *inode, struct file *file);
 static unsigned int sync_serial_poll(struct file *filp, poll_table *wait);
 
-static int sync_serial_ioctl(struct file *file,
+static long sync_serial_ioctl(struct file *file,
         unsigned int cmd, unsigned long arg);
 static ssize_t sync_serial_write(struct file *file, const char *buf,
         size_t count, loff_t *ppos);
@@ -625,11 +625,11 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                         *R_IRQ_MASK1_SET = 1 << port->data_avail_bit;
                 DEBUG(printk(KERN_DEBUG "sser%d rec started\n", dev));
         }
-        ret = 0;
+        err = 0;
         
 out:
         mutex_unlock(&sync_serial_mutex);
-        return ret;
+        return err;
 }
 
 static int sync_serial_release(struct inode *inode, struct file *file)
diff --git a/arch/cris/arch-v10/kernel/irq.c b/arch/cris/arch-v10/kernel/irq.c
index 907cfb5a873d..ba0e5965d6e3 100644
--- a/arch/cris/arch-v10/kernel/irq.c
+++ b/arch/cris/arch-v10/kernel/irq.c
@@ -20,6 +20,9 @@
 #define crisv10_mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
 #define crisv10_unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
 
+extern void kgdb_init(void);
+extern void breakpoint(void);
+
 /* don't use set_int_vector, it bypasses the linux interrupt handlers. it is
  * global just so that the kernel gdb can use it.
  */
diff --git a/arch/cris/include/asm/thread_info.h b/arch/cris/include/asm/thread_info.h
index 29b74a105830..332f19c54557 100644
--- a/arch/cris/include/asm/thread_info.h
+++ b/arch/cris/include/asm/thread_info.h
@@ -11,8 +11,6 @@
 
 #ifdef __KERNEL__
 
-#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
-
 #ifndef __ASSEMBLY__
 #include <asm/types.h>
 #include <asm/processor.h>
@@ -67,8 +65,10 @@ struct thread_info {
 
 #define init_thread_info        (init_thread_union.thread_info)
 
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
 /* thread information allocation */
-#define alloc_thread_info(tsk, node) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
+#define alloc_thread_info_node(tsk, node)       \
+        ((struct thread_info *) __get_free_pages(GFP_KERNEL, 1))
 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
 
 #endif /* !__ASSEMBLY__ */
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index cb884e489425..bad27a6ff407 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -7,6 +7,7 @@ config FRV
         select HAVE_PERF_EVENTS
         select HAVE_GENERIC_HARDIRQS
         select GENERIC_IRQ_SHOW
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
 config ZONE_DMA
         bool
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 64c7ab7e7a81..124854714958 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -28,6 +28,7 @@ config IA64
         select IRQ_PER_CPU
         select GENERIC_IRQ_SHOW
         select ARCH_WANT_OPTIONAL_GPIOLIB
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
         default y
         help
           The Itanium Processor Family is Intel's 64-bit successor to
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 284cd3771eaa..9e8ee9d2b8ca 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -6,6 +6,7 @@ config M68K
         select GENERIC_ATOMIC64 if MMU
         select HAVE_GENERIC_HARDIRQS if !MMU
         select GENERIC_IRQ_SHOW if !MMU
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
 
 config RWSEM_GENERIC_SPINLOCK
         bool
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 65adc86a230e..e077b0bf56ca 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -15,6 +15,7 @@ config PARISC
         select HAVE_GENERIC_HARDIRQS
         select GENERIC_IRQ_PROBE
         select IRQ_PER_CPU
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
         help
           The PA-RISC microprocessor is designed by Hewlett-Packard and used
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 374c475e56a3..6926b61acfea 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -136,6 +136,7 @@ config PPC
         select HAVE_SYSCALL_TRACEPOINTS
         select HAVE_BPF_JIT if (PPC64 && NET)
         select HAVE_ARCH_JUMP_LABEL
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
 config EARLY_PRINTK
         bool
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 17dbb4318261..ed5cb5af5281 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -81,6 +81,7 @@ config S390
         select INIT_ALL_POSSIBLE
         select HAVE_IRQ_WORK
         select HAVE_PERF_EVENTS
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
         select HAVE_KERNEL_GZIP
         select HAVE_KERNEL_BZIP2
         select HAVE_KERNEL_LZMA
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 748ff1920068..ff9177c8f643 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -11,6 +11,7 @@ config SUPERH
         select HAVE_DMA_ATTRS
         select HAVE_IRQ_WORK
         select HAVE_PERF_EVENTS
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
         select PERF_USE_VMALLOC
         select HAVE_KERNEL_GZIP
         select HAVE_KERNEL_BZIP2
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 84db0d6ccd0d..3c45de1db716 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -16,12 +16,13 @@
 #include <linux/thread_info.h>
 #include <linux/irqflags.h>
 #include <linux/smp.h>
+#include <linux/cpuidle.h>
 #include <asm/pgalloc.h>
 #include <asm/system.h>
 #include <linux/atomic.h>
 #include <asm/smp.h>
 
-void (*pm_idle)(void) = NULL;
+static void (*pm_idle)(void);
 
 static int hlt_counter;
 
@@ -100,7 +101,8 @@ void cpu_idle(void)
                         local_irq_disable();
                         /* Don't trace irqs off for idle */
                         stop_critical_timings();
-                        pm_idle();
+                        if (cpuidle_call_idle())
+                                pm_idle();
                         /*
                          * Sanity check to ensure that pm_idle() returns
                          * with IRQs enabled
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 1074dddcb104..42c67beadcae 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -54,6 +54,7 @@ config SPARC64
         select HAVE_PERF_EVENTS
         select PERF_USE_VMALLOC
         select IRQ_PREFLOW_FASTEOI
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
 config ARCH_DEFCONFIG
         string
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 0249b8b4db54..b30f71ac0d06 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -12,6 +12,7 @@ config TILE
         select GENERIC_PENDING_IRQ if SMP
         select GENERIC_IRQ_SHOW
         select SYS_HYPERVISOR
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG if !M386
 
 # FIXME: investigate whether we need/want these options.
 #       select HAVE_IOREMAP_PROT
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
index 849ab2fa1f5c..aec60dc06007 100644
--- a/arch/tile/include/asm/Kbuild
+++ b/arch/tile/include/asm/Kbuild
@@ -2,3 +2,41 @@ include include/asm-generic/Kbuild.asm
 
 header-y += ucontext.h
 header-y += hardwall.h
+
+generic-y += bug.h
+generic-y += bugs.h
+generic-y += cputime.h
+generic-y += device.h
+generic-y += div64.h
+generic-y += emergency-restart.h
+generic-y += errno.h
+generic-y += fb.h
+generic-y += fcntl.h
+generic-y += ioctl.h
+generic-y += ioctls.h
+generic-y += ipc.h
+generic-y += ipcbuf.h
+generic-y += irq_regs.h
+generic-y += kdebug.h
+generic-y += local.h
+generic-y += module.h
+generic-y += msgbuf.h
+generic-y += mutex.h
+generic-y += param.h
+generic-y += parport.h
+generic-y += poll.h
+generic-y += posix_types.h
+generic-y += resource.h
+generic-y += scatterlist.h
+generic-y += sembuf.h
+generic-y += serial.h
+generic-y += shmbuf.h
+generic-y += shmparam.h
+generic-y += socket.h
+generic-y += sockios.h
+generic-y += statfs.h
+generic-y += termbits.h
+generic-y += termios.h
+generic-y += types.h
+generic-y += ucontext.h
+generic-y += xor.h
diff --git a/arch/tile/include/asm/bug.h b/arch/tile/include/asm/bug.h
deleted file mode 100644
index b12fd89e42e9..000000000000
--- a/arch/tile/include/asm/bug.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/bug.h>
diff --git a/arch/tile/include/asm/bugs.h b/arch/tile/include/asm/bugs.h
deleted file mode 100644
index 61791e1ad9f5..000000000000
--- a/arch/tile/include/asm/bugs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/bugs.h>
diff --git a/arch/tile/include/asm/cputime.h b/arch/tile/include/asm/cputime.h
deleted file mode 100644
index 6d68ad7e0ea3..000000000000
--- a/arch/tile/include/asm/cputime.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/cputime.h>
diff --git a/arch/tile/include/asm/device.h b/arch/tile/include/asm/device.h
deleted file mode 100644
index f0a4c256403b..000000000000
--- a/arch/tile/include/asm/device.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/device.h>
diff --git a/arch/tile/include/asm/div64.h b/arch/tile/include/asm/div64.h
deleted file mode 100644
index 6cd978cefb28..000000000000
--- a/arch/tile/include/asm/div64.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/div64.h>
diff --git a/arch/tile/include/asm/emergency-restart.h b/arch/tile/include/asm/emergency-restart.h
deleted file mode 100644
index 3711bd9d50bd..000000000000
--- a/arch/tile/include/asm/emergency-restart.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/emergency-restart.h>
diff --git a/arch/tile/include/asm/errno.h b/arch/tile/include/asm/errno.h
deleted file mode 100644
index 4c82b503d92f..000000000000
--- a/arch/tile/include/asm/errno.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/errno.h>
diff --git a/arch/tile/include/asm/fb.h b/arch/tile/include/asm/fb.h
deleted file mode 100644
index 3a4988e8df45..000000000000
--- a/arch/tile/include/asm/fb.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/fb.h>
diff --git a/arch/tile/include/asm/fcntl.h b/arch/tile/include/asm/fcntl.h
deleted file mode 100644
index 46ab12db5739..000000000000
--- a/arch/tile/include/asm/fcntl.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/fcntl.h>
diff --git a/arch/tile/include/asm/fixmap.h b/arch/tile/include/asm/fixmap.h
index 51537ff9265a..c66f7933beaa 100644
--- a/arch/tile/include/asm/fixmap.h
+++ b/arch/tile/include/asm/fixmap.h
@@ -75,12 +75,6 @@ extern void __set_fixmap(enum fixed_addresses idx,
 
 #define set_fixmap(idx, phys) \
                 __set_fixmap(idx, phys, PAGE_KERNEL)
-/*
- * Some hardware wants to get fixmapped without caching.
- */
-#define set_fixmap_nocache(idx, phys) \
-                __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
-
 #define clear_fixmap(idx) \
                 __set_fixmap(idx, 0, __pgprot(0))
 
diff --git a/arch/tile/include/asm/ioctl.h b/arch/tile/include/asm/ioctl.h
deleted file mode 100644
index b279fe06dfe5..000000000000
--- a/arch/tile/include/asm/ioctl.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ioctl.h>
diff --git a/arch/tile/include/asm/ioctls.h b/arch/tile/include/asm/ioctls.h
deleted file mode 100644
index ec34c760665e..000000000000
--- a/arch/tile/include/asm/ioctls.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ioctls.h>
diff --git a/arch/tile/include/asm/ipc.h b/arch/tile/include/asm/ipc.h
deleted file mode 100644
index a46e3d9c2a3f..000000000000
--- a/arch/tile/include/asm/ipc.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ipc.h>
diff --git a/arch/tile/include/asm/ipcbuf.h b/arch/tile/include/asm/ipcbuf.h
deleted file mode 100644
index 84c7e51cb6d0..000000000000
--- a/arch/tile/include/asm/ipcbuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ipcbuf.h>
diff --git a/arch/tile/include/asm/irq_regs.h b/arch/tile/include/asm/irq_regs.h
deleted file mode 100644
index 3dd9c0b70270..000000000000
--- a/arch/tile/include/asm/irq_regs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/irq_regs.h>
diff --git a/arch/tile/include/asm/kdebug.h b/arch/tile/include/asm/kdebug.h
deleted file mode 100644
index 6ece1b037665..000000000000
--- a/arch/tile/include/asm/kdebug.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/kdebug.h>
diff --git a/arch/tile/include/asm/local.h b/arch/tile/include/asm/local.h
deleted file mode 100644
index c11c530f74d0..000000000000
--- a/arch/tile/include/asm/local.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/local.h>
diff --git a/arch/tile/include/asm/module.h b/arch/tile/include/asm/module.h
deleted file mode 100644
index 1e4b79fe8584..000000000000
--- a/arch/tile/include/asm/module.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/module.h>
diff --git a/arch/tile/include/asm/msgbuf.h b/arch/tile/include/asm/msgbuf.h
deleted file mode 100644
index 809134c644a6..000000000000
--- a/arch/tile/include/asm/msgbuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/msgbuf.h>
diff --git a/arch/tile/include/asm/mutex.h b/arch/tile/include/asm/mutex.h
deleted file mode 100644
index ff6101aa2c71..000000000000
--- a/arch/tile/include/asm/mutex.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/mutex-dec.h>
diff --git a/arch/tile/include/asm/param.h b/arch/tile/include/asm/param.h
deleted file mode 100644
index 965d45427975..000000000000
--- a/arch/tile/include/asm/param.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/param.h>
diff --git a/arch/tile/include/asm/parport.h b/arch/tile/include/asm/parport.h
deleted file mode 100644
index cf252af64590..000000000000
--- a/arch/tile/include/asm/parport.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/parport.h>
diff --git a/arch/tile/include/asm/poll.h b/arch/tile/include/asm/poll.h
deleted file mode 100644
index c98509d3149e..000000000000
--- a/arch/tile/include/asm/poll.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/poll.h>
diff --git a/arch/tile/include/asm/posix_types.h b/arch/tile/include/asm/posix_types.h
deleted file mode 100644
index 22cae6230ceb..000000000000
--- a/arch/tile/include/asm/posix_types.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/posix_types.h>
diff --git a/arch/tile/include/asm/resource.h b/arch/tile/include/asm/resource.h
deleted file mode 100644
index 04bc4db8921b..000000000000
--- a/arch/tile/include/asm/resource.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/resource.h>
diff --git a/arch/tile/include/asm/scatterlist.h b/arch/tile/include/asm/scatterlist.h
deleted file mode 100644
index 35d786fe93ae..000000000000
--- a/arch/tile/include/asm/scatterlist.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/scatterlist.h>
diff --git a/arch/tile/include/asm/sembuf.h b/arch/tile/include/asm/sembuf.h
deleted file mode 100644
index 7673b83cfef7..000000000000
--- a/arch/tile/include/asm/sembuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/sembuf.h>
diff --git a/arch/tile/include/asm/serial.h b/arch/tile/include/asm/serial.h
deleted file mode 100644
index a0cb0caff152..000000000000
--- a/arch/tile/include/asm/serial.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/serial.h>
diff --git a/arch/tile/include/asm/shmbuf.h b/arch/tile/include/asm/shmbuf.h
deleted file mode 100644
index 83c05fc2de38..000000000000
--- a/arch/tile/include/asm/shmbuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/shmbuf.h>
diff --git a/arch/tile/include/asm/shmparam.h b/arch/tile/include/asm/shmparam.h
deleted file mode 100644
index 93f30deb95d0..000000000000
--- a/arch/tile/include/asm/shmparam.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/shmparam.h>
diff --git a/arch/tile/include/asm/socket.h b/arch/tile/include/asm/socket.h
deleted file mode 100644
index 6b71384b9d8b..000000000000
--- a/arch/tile/include/asm/socket.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/socket.h>
diff --git a/arch/tile/include/asm/sockios.h b/arch/tile/include/asm/sockios.h
deleted file mode 100644
index def6d4746ee7..000000000000
--- a/arch/tile/include/asm/sockios.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/sockios.h>
diff --git a/arch/tile/include/asm/statfs.h b/arch/tile/include/asm/statfs.h
deleted file mode 100644
index 0b91fe198c20..000000000000
--- a/arch/tile/include/asm/statfs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/statfs.h>
diff --git a/arch/tile/include/asm/termbits.h b/arch/tile/include/asm/termbits.h
deleted file mode 100644
index 3935b106de79..000000000000
--- a/arch/tile/include/asm/termbits.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/termbits.h>
diff --git a/arch/tile/include/asm/termios.h b/arch/tile/include/asm/termios.h
deleted file mode 100644
index 280d78a9d966..000000000000
--- a/arch/tile/include/asm/termios.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/termios.h>
diff --git a/arch/tile/include/asm/types.h b/arch/tile/include/asm/types.h
deleted file mode 100644
index b9e79bc580dd..000000000000
--- a/arch/tile/include/asm/types.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/types.h>
diff --git a/arch/tile/include/asm/ucontext.h b/arch/tile/include/asm/ucontext.h
deleted file mode 100644
index 9bc07b9f30fb..000000000000
--- a/arch/tile/include/asm/ucontext.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ucontext.h>
diff --git a/arch/tile/include/asm/xor.h b/arch/tile/include/asm/xor.h
deleted file mode 100644
index c82eb12a5b18..000000000000
--- a/arch/tile/include/asm/xor.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/xor.h>
diff --git a/arch/tile/include/hv/drv_srom_intf.h b/arch/tile/include/hv/drv_srom_intf.h
new file mode 100644
index 000000000000..6395faa6d9e6
--- /dev/null
+++ b/arch/tile/include/hv/drv_srom_intf.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2011 Tilera Corporation. All Rights Reserved.
+ *
+ *   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.
+ *
+ *   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, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/**
+ * @file drv_srom_intf.h
+ * Interface definitions for the SPI Flash ROM driver.
+ */
+
+#ifndef _SYS_HV_INCLUDE_DRV_SROM_INTF_H
+#define _SYS_HV_INCLUDE_DRV_SROM_INTF_H
+
+/** Read this offset to get the total device size. */
+#define SROM_TOTAL_SIZE_OFF   0xF0000000
+
+/** Read this offset to get the device sector size. */
+#define SROM_SECTOR_SIZE_OFF  0xF0000004
+
+/** Read this offset to get the device page size. */
+#define SROM_PAGE_SIZE_OFF    0xF0000008
+
+/** Write this offset to flush any pending writes. */
+#define SROM_FLUSH_OFF        0xF1000000
+
+/** Write this offset, plus the byte offset of the start of a sector, to
+ *  erase a sector.  Any write data is ignored, but there must be at least
+ *  one byte of write data.  Only applies when the driver is in MTD mode.
+ */
+#define SROM_ERASE_OFF        0xF2000000
+
+#endif /* _SYS_HV_INCLUDE_DRV_SROM_INTF_H */
diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c
index c4be58cc5d50..f6f50f2a5e37 100644
--- a/arch/tile/kernel/time.c
+++ b/arch/tile/kernel/time.c
@@ -78,7 +78,6 @@ static struct clocksource cycle_counter_cs = {
         .rating = 300,
         .read = clocksource_get_cycles,
         .mask = CLOCKSOURCE_MASK(64),
-        .shift = 22,   /* typical value, e.g. x86 tsc uses this */
         .flags = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
@@ -91,8 +90,6 @@ void __init setup_clock(void)
         cycles_per_sec = hv_sysconf(HV_SYSCONF_CPU_SPEED);
         sched_clock_mult =
                 clocksource_hz2mult(cycles_per_sec, SCHED_CLOCK_SHIFT);
-        cycle_counter_cs.mult =
-                clocksource_hz2mult(cycles_per_sec, cycle_counter_cs.shift);
 }
 
 void __init calibrate_delay(void)
@@ -107,7 +104,7 @@ void __init calibrate_delay(void)
 void __init time_init(void)
 {
         /* Initialize and register the clock source. */
-        clocksource_register(&cycle_counter_cs);
+        clocksource_register_hz(&cycle_counter_cs, cycles_per_sec);
 
         /* Start up the tile-timer interrupt source on the boot cpu. */
         setup_tile_timer();
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
index 4e10c4023028..7309988c9794 100644
--- a/arch/tile/mm/init.c
+++ b/arch/tile/mm/init.c
@@ -836,8 +836,7 @@ void __init mem_init(void)
 #endif
 
 #ifdef CONFIG_FLATMEM
-        if (!mem_map)
-                BUG();
+        BUG_ON(!mem_map);
 #endif
 
 #ifdef CONFIG_HIGHMEM
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7cf916fc1ce7..6a47bb22657f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -72,6 +72,7 @@ config X86
         select USE_GENERIC_SMP_HELPERS if SMP
         select HAVE_BPF_JIT if (X86_64 && NET)
         select CLKEVT_I8253
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
 config INSTRUCTION_DECODER
         def_bool (KPROBES || PERF_EVENTS)
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index d02804d650c4..d8e8eefbe24c 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -40,8 +40,6 @@
 #include <linux/compiler.h>
 #include <asm/page.h>
 
-#include <xen/xen.h>
-
 #define build_mmio_read(name, size, type, reg, barrier) \
 static inline type name(const volatile void __iomem *addr) \
 { type ret; asm volatile("mov" size " %1,%0":reg (ret) \
@@ -334,6 +332,7 @@ extern void fixup_early_ioremap(void);
 extern bool is_early_ioremap_ptep(pte_t *ptep);
 
 #ifdef CONFIG_XEN
+#include <xen/xen.h>
 struct bio_vec;
 
 extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 219371546afd..0d1171c97729 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -751,8 +751,6 @@ static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
                      :: "a" (eax), "c" (ecx));
 }
 
-extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
-
 extern void select_idle_routine(const struct cpuinfo_x86 *c);
 extern void init_amd_e400_c1e_mask(void);
 
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 5812404a0d4c..f50e7fb2a201 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -149,6 +149,29 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 }
 EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_probe);
 
+/*
+ * This uses new MONITOR/MWAIT instructions on P4 processors with PNI,
+ * which can obviate IPI to trigger checking of need_resched.
+ * We execute MONITOR against need_resched and enter optimized wait state
+ * through MWAIT. Whenever someone changes need_resched, we would be woken
+ * up from MWAIT (without an IPI).
+ *
+ * New with Core Duo processors, MWAIT can take some hints based on CPU
+ * capability.
+ */
+void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
+{
+        if (!need_resched()) {
+                if (this_cpu_has(X86_FEATURE_CLFLUSH_MONITOR))
+                        clflush((void *)&current_thread_info()->flags);
+
+                __monitor((void *)&current_thread_info()->flags, 0, 0);
+                smp_mb();
+                if (!need_resched())
+                        __mwait(ax, cx);
+        }
+}
+
 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cx)
 {
         unsigned int cpu = smp_processor_id();
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index e1ba8cb24e4e..e7e3b019c439 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -438,29 +438,6 @@ void cpu_idle_wait(void)
 }
 EXPORT_SYMBOL_GPL(cpu_idle_wait);
 
-/*
- * This uses new MONITOR/MWAIT instructions on P4 processors with PNI,
- * which can obviate IPI to trigger checking of need_resched.
- * We execute MONITOR against need_resched and enter optimized wait state
- * through MWAIT. Whenever someone changes need_resched, we would be woken
- * up from MWAIT (without an IPI).
- *
- * New with Core Duo processors, MWAIT can take some hints based on CPU
- * capability.
- */
-void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
-{
-        if (!need_resched()) {
-                if (this_cpu_has(X86_FEATURE_CLFLUSH_MONITOR))
-                        clflush((void *)&current_thread_info()->flags);
-
-                __monitor((void *)&current_thread_info()->flags, 0, 0);
-                smp_mb();
-                if (!need_resched())
-                        __mwait(ax, cx);
-        }
-}
-
 /* Default MONITOR/MWAIT with no hints, used for default C1 state */
 static void mwait_idle(void)
 {
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index a3d0dc59067b..7a3b65107a27 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -38,6 +38,7 @@
 #include <linux/uaccess.h>
 #include <linux/io.h>
 #include <linux/kdebug.h>
+#include <linux/cpuidle.h>
 
 #include <asm/pgtable.h>
 #include <asm/system.h>
@@ -109,7 +110,8 @@ void cpu_idle(void)
                         local_irq_disable();
                         /* Don't trace irqs off for idle */
                         stop_critical_timings();
-                        pm_idle();
+                        if (cpuidle_idle_call())
+                                pm_idle();
                         start_critical_timings();
                 }
                 tick_nohz_restart_sched_tick();
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ca6f7ab8df33..f693e44e1bf6 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -37,6 +37,7 @@
 #include <linux/uaccess.h>
 #include <linux/io.h>
 #include <linux/ftrace.h>
+#include <linux/cpuidle.h>
 
 #include <asm/pgtable.h>
 #include <asm/system.h>
@@ -136,7 +137,8 @@ void cpu_idle(void)
                         enter_idle();
                         /* Don't trace irqs off for idle */
                         stop_critical_timings();
-                        pm_idle();
+                        if (cpuidle_idle_call())
+                                pm_idle();
                         start_critical_timings();
 
                         /* In many cases the interrupt that ended idle
diff --git a/arch/x86/platform/mrst/Makefile b/arch/x86/platform/mrst/Makefile
index f61ccdd49341..1ea38775a6d3 100644
--- a/arch/x86/platform/mrst/Makefile
+++ b/arch/x86/platform/mrst/Makefile
@@ -1,3 +1,4 @@
 obj-$(CONFIG_X86_MRST)          += mrst.o
 obj-$(CONFIG_X86_MRST)          += vrtc.o
 obj-$(CONFIG_EARLY_PRINTK_MRST) += early_printk_mrst.o
+obj-$(CONFIG_X86_MRST)          += pmu.o
diff --git a/arch/x86/platform/mrst/pmu.c b/arch/x86/platform/mrst/pmu.c
new file mode 100644
index 000000000000..9281da7d91bd
--- /dev/null
+++ b/arch/x86/platform/mrst/pmu.c
@@ -0,0 +1,817 @@
+/*
+ * mrst/pmu.c - driver for MRST Power Management Unit
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/cpuidle.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/seq_file.h>
+#include <linux/sfi.h>
+#include <asm/intel_scu_ipc.h>
+#include "pmu.h"
+
+#define IPCMSG_FW_REVISION      0xF4
+
+struct mrst_device {
+        u16 pci_dev_num;        /* DEBUG only */
+        u16 lss;
+        u16 latest_request;
+        unsigned int pci_state_counts[PCI_D3cold + 1]; /* DEBUG only */
+};
+
+/*
+ * comlete list of MRST PCI devices
+ */
+static struct mrst_device mrst_devs[] = {
+/*  0 */ { 0x0800, LSS_SPI0 },          /* Moorestown SPI Ctrl 0 */
+/*  1 */ { 0x0801, LSS_SPI1 },          /* Moorestown SPI Ctrl 1 */
+/*  2 */ { 0x0802, LSS_I2C0 },          /* Moorestown I2C 0 */
+/*  3 */ { 0x0803, LSS_I2C1 },          /* Moorestown I2C 1 */
+/*  4 */ { 0x0804, LSS_I2C2 },          /* Moorestown I2C 2 */
+/*  5 */ { 0x0805, LSS_KBD },           /* Moorestown Keyboard Ctrl */
+/*  6 */ { 0x0806, LSS_USB_HC },        /* Moorestown USB Ctrl */
+/*  7 */ { 0x0807, LSS_SD_HC0 },        /* Moorestown SD Host Ctrl 0 */
+/*  8 */ { 0x0808, LSS_SD_HC1 },        /* Moorestown SD Host Ctrl 1 */
+/*  9 */ { 0x0809, LSS_NAND },          /* Moorestown NAND Ctrl */
+/* 10 */ { 0x080a, LSS_AUDIO },         /* Moorestown Audio Ctrl */
+/* 11 */ { 0x080b, LSS_IMAGING },       /* Moorestown ISP */
+/* 12 */ { 0x080c, LSS_SECURITY },      /* Moorestown Security Controller */
+/* 13 */ { 0x080d, LSS_DISPLAY },       /* Moorestown External Displays */
+/* 14 */ { 0x080e, 0 },                 /* Moorestown SCU IPC */
+/* 15 */ { 0x080f, LSS_GPIO },          /* Moorestown GPIO Controller */
+/* 16 */ { 0x0810, 0 },                 /* Moorestown Power Management Unit */
+/* 17 */ { 0x0811, LSS_USB_OTG },       /* Moorestown OTG Ctrl */
+/* 18 */ { 0x0812, LSS_SPI2 },          /* Moorestown SPI Ctrl 2 */
+/* 19 */ { 0x0813, 0 },                 /* Moorestown SC DMA */
+/* 20 */ { 0x0814, LSS_AUDIO_LPE },     /* Moorestown LPE DMA */
+/* 21 */ { 0x0815, LSS_AUDIO_SSP },     /* Moorestown SSP0 */
+
+/* 22 */ { 0x084F, LSS_SD_HC2 },        /* Moorestown SD Host Ctrl 2 */
+
+/* 23 */ { 0x4102, 0 },                 /* Lincroft */
+/* 24 */ { 0x4110, 0 },                 /* Lincroft */
+};
+
+/* n.b. We ignore PCI-id 0x815 in LSS9 b/c MeeGo has no driver for it */
+static u16 mrst_lss9_pci_ids[] = {0x080a, 0x0814, 0};
+static u16 mrst_lss10_pci_ids[] = {0x0800, 0x0801, 0x0802, 0x0803,
+                                        0x0804, 0x0805, 0x080f, 0};
+
+/* handle concurrent SMP invokations of pmu_pci_set_power_state() */
+static spinlock_t mrst_pmu_power_state_lock;
+
+static unsigned int wake_counters[MRST_NUM_LSS];        /* DEBUG only */
+static unsigned int pmu_irq_stats[INT_INVALID + 1];     /* DEBUG only */
+
+static int graphics_is_off;
+static int lss_s0i3_enabled;
+static bool mrst_pmu_s0i3_enable;
+
+/*  debug counters */
+static u32 pmu_wait_ready_calls;
+static u32 pmu_wait_ready_udelays;
+static u32 pmu_wait_ready_udelays_max;
+static u32 pmu_wait_done_calls;
+static u32 pmu_wait_done_udelays;
+static u32 pmu_wait_done_udelays_max;
+static u32 pmu_set_power_state_entry;
+static u32 pmu_set_power_state_send_cmd;
+
+static struct mrst_device *pci_id_2_mrst_dev(u16 pci_dev_num)
+{
+        int index = 0;
+
+        if ((pci_dev_num >= 0x0800) && (pci_dev_num <= 0x815))
+                index = pci_dev_num - 0x800;
+        else if (pci_dev_num == 0x084F)
+                index = 22;
+        else if (pci_dev_num == 0x4102)
+                index = 23;
+        else if (pci_dev_num == 0x4110)
+                index = 24;
+
+        if (pci_dev_num != mrst_devs[index].pci_dev_num) {
+                WARN_ONCE(1, FW_BUG "Unknown PCI device 0x%04X\n", pci_dev_num);
+                return 0;
+        }
+
+        return &mrst_devs[index];
+}
+
+/**
+ * mrst_pmu_validate_cstates
+ * @dev: cpuidle_device
+ *
+ * Certain states are not appropriate for governor to pick in some cases.
+ * This function will be called as cpuidle_device's prepare callback and
+ * thus tells governor to ignore such states when selecting the next state
+ * to enter.
+ */
+
+#define IDLE_STATE4_IS_C6       4
+#define IDLE_STATE5_IS_S0I3     5
+
+int mrst_pmu_invalid_cstates(void)
+{
+        int cpu = smp_processor_id();
+
+        /*
+         * Demote to C4 if the PMU is busy.
+         * Since LSS changes leave the busy bit clear...
+         * busy means either the PMU is waiting for an ACK-C6 that
+         * isn't coming due to an MWAIT that returned immediately;
+         * or we returned from S0i3 successfully, and the PMU
+         * is not done sending us interrupts.
+         */
+        if (pmu_read_busy_status())
+                return 1 << IDLE_STATE4_IS_C6 | 1 << IDLE_STATE5_IS_S0I3;
+
+        /*
+         * Disallow S0i3 if: PMU is not initialized, or CPU1 is active,
+         * or if device LSS is insufficient, or the GPU is active,
+         * or if it has been explicitly disabled.
+         */
+        if (!pmu_reg || !cpumask_equal(cpu_online_mask, cpumask_of(cpu)) ||
+            !lss_s0i3_enabled || !graphics_is_off || !mrst_pmu_s0i3_enable)
+                return 1 << IDLE_STATE5_IS_S0I3;
+        else
+                return 0;
+}
+
+/*
+ * pmu_update_wake_counters(): read PM_WKS, update wake_counters[]
+ * DEBUG only.
+ */
+static void pmu_update_wake_counters(void)
+{
+        int lss;
+        u32 wake_status;
+
+        wake_status = pmu_read_wks();
+
+        for (lss = 0; lss < MRST_NUM_LSS; ++lss) {
+                if (wake_status & (1 << lss))
+                        wake_counters[lss]++;
+        }
+}
+
+int mrst_pmu_s0i3_entry(void)
+{
+        int status;
+
+        /* Clear any possible error conditions */
+        pmu_write_ics(0x300);
+
+        /* set wake control to current D-states */
+        pmu_write_wssc(S0I3_SSS_TARGET);
+
+        status = mrst_s0i3_entry(PM_S0I3_COMMAND, &pmu_reg->pm_cmd);
+        pmu_update_wake_counters();
+        return status;
+}
+
+/* poll for maximum of 5ms for busy bit to clear */
+static int pmu_wait_ready(void)
+{
+        int udelays;
+
+        pmu_wait_ready_calls++;
+
+        for (udelays = 0; udelays < 500; ++udelays) {
+                if (udelays > pmu_wait_ready_udelays_max)
+                        pmu_wait_ready_udelays_max = udelays;
+
+                if (pmu_read_busy_status() == 0)
+                        return 0;
+
+                udelay(10);
+                pmu_wait_ready_udelays++;
+        }
+
+        /*
+         * if this fires, observe
+         * /sys/kernel/debug/mrst_pmu_wait_ready_calls
+         * /sys/kernel/debug/mrst_pmu_wait_ready_udelays
+         */
+        WARN_ONCE(1, "SCU not ready for 5ms");
+        return -EBUSY;
+}
+/* poll for maximum of 50ms us for busy bit to clear */
+static int pmu_wait_done(void)
+{
+        int udelays;
+
+        pmu_wait_done_calls++;
+
+        for (udelays = 0; udelays < 500; ++udelays) {
+                if (udelays > pmu_wait_done_udelays_max)
+                        pmu_wait_done_udelays_max = udelays;
+
+                if (pmu_read_busy_status() == 0)
+                        return 0;
+
+                udelay(100);
+                pmu_wait_done_udelays++;
+        }
+
+        /*
+         * if this fires, observe
+         * /sys/kernel/debug/mrst_pmu_wait_done_calls
+         * /sys/kernel/debug/mrst_pmu_wait_done_udelays
+         */
+        WARN_ONCE(1, "SCU not done for 50ms");
+        return -EBUSY;
+}
+
+u32 mrst_pmu_msi_is_disabled(void)
+{
+        return pmu_msi_is_disabled();
+}
+
+void mrst_pmu_enable_msi(void)
+{
+        pmu_msi_enable();
+}
+
+/**
+ * pmu_irq - pmu driver interrupt handler
+ * Context: interrupt context
+ */
+static irqreturn_t pmu_irq(int irq, void *dummy)
+{
+        union pmu_pm_ics pmu_ics;
+
+        pmu_ics.value = pmu_read_ics();
+
+        if (!pmu_ics.bits.pending)
+                return IRQ_NONE;
+
+        switch (pmu_ics.bits.cause) {
+        case INT_SPURIOUS:
+        case INT_CMD_DONE:
+        case INT_CMD_ERR:
+        case INT_WAKE_RX:
+        case INT_SS_ERROR:
+        case INT_S0IX_MISS:
+        case INT_NO_ACKC6:
+                pmu_irq_stats[pmu_ics.bits.cause]++;
+                break;
+        default:
+                pmu_irq_stats[INT_INVALID]++;
+        }
+
+        pmu_write_ics(pmu_ics.value); /* Clear pending interrupt */
+
+        return IRQ_HANDLED;
+}
+
+/*
+ * Translate PCI power management to MRST LSS D-states
+ */
+static int pci_2_mrst_state(int lss, pci_power_t pci_state)
+{
+        switch (pci_state) {
+        case PCI_D0:
+                if (SSMSK(D0i1, lss) & D0I1_ACG_SSS_TARGET)
+                        return D0i1;
+                else
+                        return D0;
+        case PCI_D1:
+                return D0i1;
+        case PCI_D2:
+                return D0i2;
+        case PCI_D3hot:
+        case PCI_D3cold:
+                return D0i3;
+        default:
+                WARN(1, "pci_state %d\n", pci_state);
+                return 0;
+        }
+}
+
+static int pmu_issue_command(u32 pm_ssc)
+{
+        union pmu_pm_set_cfg_cmd_t command;
+
+        if (pmu_read_busy_status()) {
+                pr_debug("pmu is busy, Operation not permitted\n");
+                return -1;
+        }
+
+        /*
+         * enable interrupts in PMU so that interrupts are
+         * propagated when ioc bit for a particular set
+         * command is set
+         */
+
+        pmu_irq_enable();
+
+        /* Configure the sub systems for pmu2 */
+
+        pmu_write_ssc(pm_ssc);
+
+        /*
+         * Send the set config command for pmu its configured
+         * for mode CM_IMMEDIATE & hence with No Trigger
+         */
+
+        command.pmu2_params.d_param.cfg_mode = CM_IMMEDIATE;
+        command.pmu2_params.d_param.cfg_delay = 0;
+        command.pmu2_params.d_param.rsvd = 0;
+
+        /* construct the command to send SET_CFG to particular PMU */
+        command.pmu2_params.d_param.cmd = SET_CFG_CMD;
+        command.pmu2_params.d_param.ioc = 0;
+        command.pmu2_params.d_param.mode_id = 0;
+        command.pmu2_params.d_param.sys_state = SYS_STATE_S0I0;
+
+        /* write the value of PM_CMD into particular PMU */
+        pr_debug("pmu command being written %x\n",
+                        command.pmu_pm_set_cfg_cmd_value);
+
+        pmu_write_cmd(command.pmu_pm_set_cfg_cmd_value);
+
+        return 0;
+}
+
+static u16 pmu_min_lss_pci_req(u16 *ids, u16 pci_state)
+{
+        u16 existing_request;
+        int i;
+
+        for (i = 0; ids[i]; ++i) {
+                struct mrst_device *mrst_dev;
+
+                mrst_dev = pci_id_2_mrst_dev(ids[i]);
+                if (unlikely(!mrst_dev))
+                        continue;
+
+                existing_request = mrst_dev->latest_request;
+                if (existing_request < pci_state)
+                        pci_state = existing_request;
+        }
+        return pci_state;
+}
+
+/**
+ * pmu_pci_set_power_state - Callback function is used by all the PCI devices
+ *                      for a platform  specific device power on/shutdown.
+ */
+
+int pmu_pci_set_power_state(struct pci_dev *pdev, pci_power_t pci_state)
+{
+        u32 old_sss, new_sss;
+        int status = 0;
+        struct mrst_device *mrst_dev;
+
+        pmu_set_power_state_entry++;
+
+        BUG_ON(pdev->vendor != PCI_VENDOR_ID_INTEL);
+        BUG_ON(pci_state < PCI_D0 || pci_state > PCI_D3cold);
+
+        mrst_dev = pci_id_2_mrst_dev(pdev->device);
+        if (unlikely(!mrst_dev))
+                return -ENODEV;
+
+        mrst_dev->pci_state_counts[pci_state]++;        /* count invocations */
+
+        /* PMU driver calls self as part of PCI initialization, ignore */
+        if (pdev->device == PCI_DEV_ID_MRST_PMU)
+                return 0;
+
+        BUG_ON(!pmu_reg); /* SW bug if called before initialized */
+
+        spin_lock(&mrst_pmu_power_state_lock);
+
+        if (pdev->d3_delay) {
+                dev_dbg(&pdev->dev, "d3_delay %d, should be 0\n",
+                        pdev->d3_delay);
+                pdev->d3_delay = 0;
+        }
+        /*
+         * If Lincroft graphics, simply remember state
+         */
+        if ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY
+                && !((pdev->class & PCI_SUB_CLASS_MASK) >> 8)) {
+                if (pci_state == PCI_D0)
+                        graphics_is_off = 0;
+                else
+                        graphics_is_off = 1;
+                goto ret;
+        }
+
+        if (!mrst_dev->lss)
+                goto ret;       /* device with no LSS */
+
+        if (mrst_dev->latest_request == pci_state)
+                goto ret;       /* no change */
+
+        mrst_dev->latest_request = pci_state;   /* record latest request */
+
+        /*
+         * LSS9 and LSS10 contain multiple PCI devices.
+         * Use the lowest numbered (highest power) state in the LSS
+         */
+        if (mrst_dev->lss == 9)
+                pci_state = pmu_min_lss_pci_req(mrst_lss9_pci_ids, pci_state);
+        else if (mrst_dev->lss == 10)
+                pci_state = pmu_min_lss_pci_req(mrst_lss10_pci_ids, pci_state);
+
+        status = pmu_wait_ready();
+        if (status)
+                goto ret;
+
+        old_sss = pmu_read_sss();
+        new_sss = old_sss & ~SSMSK(3, mrst_dev->lss);
+        new_sss |= SSMSK(pci_2_mrst_state(mrst_dev->lss, pci_state),
+                        mrst_dev->lss);
+
+        if (new_sss == old_sss)
+                goto ret;       /* nothing to do */
+
+        pmu_set_power_state_send_cmd++;
+
+        status = pmu_issue_command(new_sss);
+
+        if (unlikely(status != 0)) {
+                dev_err(&pdev->dev, "Failed to Issue a PM command\n");
+                goto ret;
+        }
+
+        if (pmu_wait_done())
+                goto ret;
+
+        lss_s0i3_enabled =
+        ((pmu_read_sss() & S0I3_SSS_TARGET) == S0I3_SSS_TARGET);
+ret:
+        spin_unlock(&mrst_pmu_power_state_lock);
+        return status;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static char *d0ix_names[] = {"D0", "D0i1", "D0i2", "D0i3"};
+
+static inline const char *d0ix_name(int state)
+{
+        return d0ix_names[(int) state];
+}
+
+static int debug_mrst_pmu_show(struct seq_file *s, void *unused)
+{
+        struct pci_dev *pdev = NULL;
+        u32 cur_pmsss;
+        int lss;
+
+        seq_printf(s, "0x%08X D0I1_ACG_SSS_TARGET\n", D0I1_ACG_SSS_TARGET);
+
+        cur_pmsss = pmu_read_sss();
+
+        seq_printf(s, "0x%08X S0I3_SSS_TARGET\n", S0I3_SSS_TARGET);
+
+        seq_printf(s, "0x%08X Current SSS ", cur_pmsss);
+        seq_printf(s, lss_s0i3_enabled ? "\n" : "[BLOCKS s0i3]\n");
+
+        if (cpumask_equal(cpu_online_mask, cpumask_of(0)))
+                seq_printf(s, "cpu0 is only cpu online\n");
+        else
+                seq_printf(s, "cpu0 is NOT only cpu online [BLOCKS S0i3]\n");
+
+        seq_printf(s, "GFX: %s\n", graphics_is_off ? "" : "[BLOCKS s0i3]");
+
+
+        for_each_pci_dev(pdev) {
+                int pos;
+                u16 pmcsr;
+                struct mrst_device *mrst_dev;
+                int i;
+
+                mrst_dev = pci_id_2_mrst_dev(pdev->device);
+
+                seq_printf(s, "%s %04x/%04X %-16.16s ",
+                        dev_name(&pdev->dev),
+                        pdev->vendor, pdev->device,
+                        dev_driver_string(&pdev->dev));
+
+                if (unlikely (!mrst_dev)) {
+                        seq_printf(s, " UNKNOWN\n");
+                        continue;
+                }
+
+                if (mrst_dev->lss)
+                        seq_printf(s, "LSS %2d %-4s ", mrst_dev->lss,
+                                d0ix_name(((cur_pmsss >>
+                                        (mrst_dev->lss * 2)) & 0x3)));
+                else
+                        seq_printf(s, "            ");
+
+                /* PCI PM config space setting */
+                pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
+                if (pos != 0) {
+                        pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
+                seq_printf(s, "PCI-%-4s",
+                        pci_power_name(pmcsr & PCI_PM_CTRL_STATE_MASK));
+                } else {
+                        seq_printf(s, "        ");
+                }
+
+                seq_printf(s, " %s ", pci_power_name(mrst_dev->latest_request));
+                for (i = 0; i <= PCI_D3cold; ++i)
+                        seq_printf(s, "%d ", mrst_dev->pci_state_counts[i]);
+
+                if (mrst_dev->lss) {
+                        unsigned int lssmask;
+
+                        lssmask = SSMSK(D0i3, mrst_dev->lss);
+
+                        if ((lssmask & S0I3_SSS_TARGET) &&
+                                ((lssmask & cur_pmsss) !=
+                                        (lssmask & S0I3_SSS_TARGET)))
+                                                seq_printf(s , "[BLOCKS s0i3]");
+                }
+
+                seq_printf(s, "\n");
+        }
+        seq_printf(s, "Wake Counters:\n");
+        for (lss = 0; lss < MRST_NUM_LSS; ++lss)
+                seq_printf(s, "LSS%d %d\n", lss, wake_counters[lss]);
+
+        seq_printf(s, "Interrupt Counters:\n");
+        seq_printf(s,
+                "INT_SPURIOUS \t%8u\n" "INT_CMD_DONE \t%8u\n"
+                "INT_CMD_ERR  \t%8u\n" "INT_WAKE_RX  \t%8u\n"
+                "INT_SS_ERROR \t%8u\n" "INT_S0IX_MISS\t%8u\n"
+                "INT_NO_ACKC6 \t%8u\n" "INT_INVALID  \t%8u\n",
+                pmu_irq_stats[INT_SPURIOUS], pmu_irq_stats[INT_CMD_DONE],
+                pmu_irq_stats[INT_CMD_ERR], pmu_irq_stats[INT_WAKE_RX],
+                pmu_irq_stats[INT_SS_ERROR], pmu_irq_stats[INT_S0IX_MISS],
+                pmu_irq_stats[INT_NO_ACKC6], pmu_irq_stats[INT_INVALID]);
+
+        seq_printf(s, "mrst_pmu_wait_ready_calls          %8d\n",
+                        pmu_wait_ready_calls);
+        seq_printf(s, "mrst_pmu_wait_ready_udelays        %8d\n",
+                        pmu_wait_ready_udelays);
+        seq_printf(s, "mrst_pmu_wait_ready_udelays_max    %8d\n",
+                        pmu_wait_ready_udelays_max);
+        seq_printf(s, "mrst_pmu_wait_done_calls           %8d\n",
+                        pmu_wait_done_calls);
+        seq_printf(s, "mrst_pmu_wait_done_udelays         %8d\n",
+                        pmu_wait_done_udelays);
+        seq_printf(s, "mrst_pmu_wait_done_udelays_max     %8d\n",
+                        pmu_wait_done_udelays_max);
+        seq_printf(s, "mrst_pmu_set_power_state_entry     %8d\n",
+                        pmu_set_power_state_entry);
+        seq_printf(s, "mrst_pmu_set_power_state_send_cmd  %8d\n",
+                        pmu_set_power_state_send_cmd);
+        seq_printf(s, "SCU busy: %d\n", pmu_read_busy_status());
+
+        return 0;
+}
+
+static int debug_mrst_pmu_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, debug_mrst_pmu_show, NULL);
+}
+
+static const struct file_operations devices_state_operations = {
+        .open           = debug_mrst_pmu_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+#endif  /* DEBUG_FS */
+
+/*
+ * Validate SCU PCI shim PCI vendor capability byte
+ * against LSS hard-coded in mrst_devs[] above.
+ * DEBUG only.
+ */
+static void pmu_scu_firmware_debug(void)
+{
+        struct pci_dev *pdev = NULL;
+
+        for_each_pci_dev(pdev) {
+                struct mrst_device *mrst_dev;
+                u8 pci_config_lss;
+                int pos;
+
+                mrst_dev = pci_id_2_mrst_dev(pdev->device);
+                if (unlikely(!mrst_dev)) {
+                        printk(KERN_ERR FW_BUG "pmu: Unknown "
+                                "PCI device 0x%04X\n", pdev->device);
+                        continue;
+                }
+
+                if (mrst_dev->lss == 0)
+                        continue;        /* no LSS in our table */
+
+                pos = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
+                if (!pos != 0) {
+                        printk(KERN_ERR FW_BUG "pmu: 0x%04X "
+                                "missing PCI Vendor Capability\n",
+                                pdev->device);
+                        continue;
+                }
+                pci_read_config_byte(pdev, pos + 4, &pci_config_lss);
+                if (!(pci_config_lss & PCI_VENDOR_CAP_LOG_SS_MASK)) {
+                        printk(KERN_ERR FW_BUG "pmu: 0x%04X "
+                                "invalid PCI Vendor Capability 0x%x "
+                                " expected LSS 0x%X\n",
+                                pdev->device, pci_config_lss, mrst_dev->lss);
+                        continue;
+                }
+                pci_config_lss &= PCI_VENDOR_CAP_LOG_ID_MASK;
+
+                if (mrst_dev->lss == pci_config_lss)
+                        continue;
+
+                printk(KERN_ERR FW_BUG "pmu: 0x%04X LSS = %d, expected %d\n",
+                        pdev->device, pci_config_lss, mrst_dev->lss);
+        }
+}
+
+/**
+ * pmu_probe
+ */
+static int __devinit pmu_probe(struct pci_dev *pdev,
+                                   const struct pci_device_id *pci_id)
+{
+        int ret;
+        struct mrst_pmu_reg *pmu;
+
+        /* Init the device */
+        ret = pci_enable_device(pdev);
+        if (ret) {
+                dev_err(&pdev->dev, "Unable to Enable PCI device\n");
+                return ret;
+        }
+
+        ret = pci_request_regions(pdev, MRST_PMU_DRV_NAME);
+        if (ret < 0) {
+                dev_err(&pdev->dev, "Cannot obtain PCI resources, aborting\n");
+                goto out_err1;
+        }
+
+        /* Map the memory of PMU reg base */
+        pmu = pci_iomap(pdev, 0, 0);
+        if (!pmu) {
+                dev_err(&pdev->dev, "Unable to map the PMU address space\n");
+                ret = -ENOMEM;
+                goto out_err2;
+        }
+
+#ifdef CONFIG_DEBUG_FS
+        /* /sys/kernel/debug/mrst_pmu */
+        (void) debugfs_create_file("mrst_pmu", S_IFREG | S_IRUGO,
+                                NULL, NULL, &devices_state_operations);
+#endif
+        pmu_reg = pmu;  /* success */
+
+        if (request_irq(pdev->irq, pmu_irq, 0, MRST_PMU_DRV_NAME, NULL)) {
+                dev_err(&pdev->dev, "Registering isr has failed\n");
+                ret = -1;
+                goto out_err3;
+        }
+
+        pmu_scu_firmware_debug();
+
+        pmu_write_wkc(S0I3_WAKE_SOURCES);       /* Enable S0i3 wakeup sources */
+
+        pmu_wait_ready();
+
+        pmu_write_ssc(D0I1_ACG_SSS_TARGET);     /* Enable Auto-Clock_Gating */
+        pmu_write_cmd(0x201);
+
+        spin_lock_init(&mrst_pmu_power_state_lock);
+
+        /* Enable the hardware interrupt */
+        pmu_irq_enable();
+        return 0;
+
+out_err3:
+        free_irq(pdev->irq, NULL);
+        pci_iounmap(pdev, pmu_reg);
+        pmu_reg = NULL;
+out_err2:
+        pci_release_region(pdev, 0);
+out_err1:
+        pci_disable_device(pdev);
+        return ret;
+}
+
+static void __devexit pmu_remove(struct pci_dev *pdev)
+{
+        dev_err(&pdev->dev, "Mid PM pmu_remove called\n");
+
+        /* Freeing up the irq */
+        free_irq(pdev->irq, NULL);
+
+        pci_iounmap(pdev, pmu_reg);
+        pmu_reg = NULL;
+
+        /* disable the current PCI device */
+        pci_release_region(pdev, 0);
+        pci_disable_device(pdev);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(pmu_pci_ids) = {
+        { PCI_VDEVICE(INTEL, PCI_DEV_ID_MRST_PMU), 0 },
+        { }
+};
+
+MODULE_DEVICE_TABLE(pci, pmu_pci_ids);
+
+static struct pci_driver driver = {
+        .name = MRST_PMU_DRV_NAME,
+        .id_table = pmu_pci_ids,
+        .probe = pmu_probe,
+        .remove = __devexit_p(pmu_remove),
+};
+
+/**
+ * pmu_pci_register - register the PMU driver as PCI device
+ */
+static int __init pmu_pci_register(void)
+{
+        return pci_register_driver(&driver);
+}
+
+/* Register and probe via fs_initcall() to preceed device_initcall() */
+fs_initcall(pmu_pci_register);
+
+static void __exit mid_pci_cleanup(void)
+{
+        pci_unregister_driver(&driver);
+}
+
+static int ia_major;
+static int ia_minor;
+
+static int pmu_sfi_parse_oem(struct sfi_table_header *table)
+{
+        struct sfi_table_simple *sb;
+
+        sb = (struct sfi_table_simple *)table;
+        ia_major = (sb->pentry[1] >> 0) & 0xFFFF;
+        ia_minor = (sb->pentry[1] >> 16) & 0xFFFF;
+        printk(KERN_INFO "mrst_pmu: IA FW version v%x.%x\n",
+                ia_major, ia_minor);
+
+        return 0;
+}
+
+static int __init scu_fw_check(void)
+{
+        int ret;
+        u32 fw_version;
+
+        if (!pmu_reg)
+                return 0;       /* this driver didn't probe-out */
+
+        sfi_table_parse("OEMB", NULL, NULL, pmu_sfi_parse_oem);
+
+        if (ia_major < 0x6005 || ia_minor < 0x1525) {
+                WARN(1, "mrst_pmu: IA FW version too old\n");
+                return -1;
+        }
+
+        ret = intel_scu_ipc_command(IPCMSG_FW_REVISION, 0, NULL, 0,
+                                        &fw_version, 1);
+
+        if (ret) {
+                WARN(1, "mrst_pmu: IPC FW version? %d\n", ret);
+        } else {
+                int scu_major = (fw_version >> 8) & 0xFF;
+                int scu_minor = (fw_version >> 0) & 0xFF;
+
+                printk(KERN_INFO "mrst_pmu: firmware v%x\n", fw_version);
+
+                if ((scu_major >= 0xC0) && (scu_minor >= 0x49)) {
+                        printk(KERN_INFO "mrst_pmu: enabling S0i3\n");
+                        mrst_pmu_s0i3_enable = true;
+                } else {
+                        WARN(1, "mrst_pmu: S0i3 disabled, old firmware %X.%X",
+                                        scu_major, scu_minor);
+                }
+        }
+        return 0;
+}
+late_initcall(scu_fw_check);
+module_exit(mid_pci_cleanup);
diff --git a/arch/x86/platform/mrst/pmu.h b/arch/x86/platform/mrst/pmu.h
new file mode 100644
index 000000000000..bfbfe64b167b
--- /dev/null
+++ b/arch/x86/platform/mrst/pmu.h
@@ -0,0 +1,234 @@
+/*
+ * mrst/pmu.h - private definitions for MRST Power Management Unit mrst/pmu.c
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 _MRST_PMU_H_
+#define _MRST_PMU_H_
+
+#define PCI_DEV_ID_MRST_PMU             0x0810
+#define MRST_PMU_DRV_NAME               "mrst_pmu"
+#define PCI_SUB_CLASS_MASK              0xFF00
+
+#define PCI_VENDOR_CAP_LOG_ID_MASK      0x7F
+#define PCI_VENDOR_CAP_LOG_SS_MASK      0x80
+
+#define SUB_SYS_ALL_D0I1        0x01155555
+#define S0I3_WAKE_SOURCES       0x00001FFF
+
+#define PM_S0I3_COMMAND                                 \
+        ((0 << 31) |    /* Reserved */                  \
+        (0 << 30) |     /* Core must be idle */         \
+        (0xc2 << 22) |  /* ACK C6 trigger */            \
+        (3 << 19) |     /* Trigger on DMI message */    \
+        (3 << 16) |     /* Enter S0i3 */                \
+        (0 << 13) |     /* Numeric mode ID (sw) */      \
+        (3 << 9) |      /* Trigger mode */              \
+        (0 << 8) |      /* Do not interrupt */          \
+        (1 << 0))       /* Set configuration */
+
+#define LSS_DMI         0
+#define LSS_SD_HC0      1
+#define LSS_SD_HC1      2
+#define LSS_NAND        3
+#define LSS_IMAGING     4
+#define LSS_SECURITY    5
+#define LSS_DISPLAY     6
+#define LSS_USB_HC      7
+#define LSS_USB_OTG     8
+#define LSS_AUDIO       9
+#define LSS_AUDIO_LPE   9
+#define LSS_AUDIO_SSP   9
+#define LSS_I2C0        10
+#define LSS_I2C1        10
+#define LSS_I2C2        10
+#define LSS_KBD         10
+#define LSS_SPI0        10
+#define LSS_SPI1        10
+#define LSS_SPI2        10
+#define LSS_GPIO        10
+#define LSS_SRAM        11      /* used by SCU, do not touch */
+#define LSS_SD_HC2      12
+/* LSS hardware bits 15,14,13 are hardwired to 0, thus unusable */
+#define MRST_NUM_LSS    13
+
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+
+#define SSMSK(mask, lss) ((mask) << ((lss) * 2))
+#define D0      0
+#define D0i1    1
+#define D0i2    2
+#define D0i3    3
+
+#define S0I3_SSS_TARGET (               \
+        SSMSK(D0i1, LSS_DMI) |          \
+        SSMSK(D0i3, LSS_SD_HC0) |       \
+        SSMSK(D0i3, LSS_SD_HC1) |       \
+        SSMSK(D0i3, LSS_NAND) |         \
+        SSMSK(D0i3, LSS_SD_HC2) |       \
+        SSMSK(D0i3, LSS_IMAGING) |      \
+        SSMSK(D0i3, LSS_SECURITY) |     \
+        SSMSK(D0i3, LSS_DISPLAY) |      \
+        SSMSK(D0i3, LSS_USB_HC) |       \
+        SSMSK(D0i3, LSS_USB_OTG) |      \
+        SSMSK(D0i3, LSS_AUDIO) |        \
+        SSMSK(D0i1, LSS_I2C0))
+
+/*
+ * D0i1 on Langwell is Autonomous Clock Gating (ACG).
+ * Enable ACG on every LSS except camera and audio
+ */
+#define D0I1_ACG_SSS_TARGET      \
+        (SUB_SYS_ALL_D0I1 & ~SSMSK(D0i1, LSS_IMAGING) & ~SSMSK(D0i1, LSS_AUDIO))
+
+enum cm_mode {
+        CM_NOP,                 /* ignore the config mode value */
+        CM_IMMEDIATE,
+        CM_DELAY,
+        CM_TRIGGER,
+        CM_INVALID
+};
+
+enum sys_state {
+        SYS_STATE_S0I0,
+        SYS_STATE_S0I1,
+        SYS_STATE_S0I2,
+        SYS_STATE_S0I3,
+        SYS_STATE_S3,
+        SYS_STATE_S5
+};
+
+#define SET_CFG_CMD     1
+
+enum int_status {
+        INT_SPURIOUS = 0,
+        INT_CMD_DONE = 1,
+        INT_CMD_ERR = 2,
+        INT_WAKE_RX = 3,
+        INT_SS_ERROR = 4,
+        INT_S0IX_MISS = 5,
+        INT_NO_ACKC6 = 6,
+        INT_INVALID = 7,
+};
+
+/* PMU register interface */
+static struct mrst_pmu_reg {
+        u32 pm_sts;             /* 0x00 */
+        u32 pm_cmd;             /* 0x04 */
+        u32 pm_ics;             /* 0x08 */
+        u32 _resv1;             /* 0x0C */
+        u32 pm_wkc[2];          /* 0x10 */
+        u32 pm_wks[2];          /* 0x18 */
+        u32 pm_ssc[4];          /* 0x20 */
+        u32 pm_sss[4];          /* 0x30 */
+        u32 pm_wssc[4];         /* 0x40 */
+        u32 pm_c3c4;            /* 0x50 */
+        u32 pm_c5c6;            /* 0x54 */
+        u32 pm_msi_disable;     /* 0x58 */
+} *pmu_reg;
+
+static inline u32 pmu_read_sts(void) { return readl(&pmu_reg->pm_sts); }
+static inline u32 pmu_read_ics(void) { return readl(&pmu_reg->pm_ics); }
+static inline u32 pmu_read_wks(void) { return readl(&pmu_reg->pm_wks[0]); }
+static inline u32 pmu_read_sss(void) { return readl(&pmu_reg->pm_sss[0]); }
+
+static inline void pmu_write_cmd(u32 arg) { writel(arg, &pmu_reg->pm_cmd); }
+static inline void pmu_write_ics(u32 arg) { writel(arg, &pmu_reg->pm_ics); }
+static inline void pmu_write_wkc(u32 arg) { writel(arg, &pmu_reg->pm_wkc[0]); }
+static inline void pmu_write_ssc(u32 arg) { writel(arg, &pmu_reg->pm_ssc[0]); }
+static inline void pmu_write_wssc(u32 arg)
+                                        { writel(arg, &pmu_reg->pm_wssc[0]); }
+
+static inline void pmu_msi_enable(void) { writel(0, &pmu_reg->pm_msi_disable); }
+static inline u32 pmu_msi_is_disabled(void)
+                                { return readl(&pmu_reg->pm_msi_disable); }
+
+union pmu_pm_ics {
+        struct {
+                u32 cause:8;
+                u32 enable:1;
+                u32 pending:1;
+                u32 reserved:22;
+        } bits;
+        u32 value;
+};
+
+static inline void pmu_irq_enable(void)
+{
+        union pmu_pm_ics pmu_ics;
+
+        pmu_ics.value = pmu_read_ics();
+        pmu_ics.bits.enable = 1;
+        pmu_write_ics(pmu_ics.value);
+}
+
+union pmu_pm_status {
+        struct {
+                u32 pmu_rev:8;
+                u32 pmu_busy:1;
+                u32 mode_id:4;
+                u32 Reserved:19;
+        } pmu_status_parts;
+        u32 pmu_status_value;
+};
+
+static inline int pmu_read_busy_status(void)
+{
+        union pmu_pm_status result;
+
+        result.pmu_status_value = pmu_read_sts();
+
+        return result.pmu_status_parts.pmu_busy;
+}
+
+/* pmu set config parameters */
+struct cfg_delay_param_t {
+        u32 cmd:8;
+        u32 ioc:1;
+        u32 cfg_mode:4;
+        u32 mode_id:3;
+        u32 sys_state:3;
+        u32 cfg_delay:8;
+        u32 rsvd:5;
+};
+
+struct cfg_trig_param_t {
+        u32 cmd:8;
+        u32 ioc:1;
+        u32 cfg_mode:4;
+        u32 mode_id:3;
+        u32 sys_state:3;
+        u32 cfg_trig_type:3;
+        u32 cfg_trig_val:8;
+        u32 cmbi:1;
+        u32 rsvd1:1;
+};
+
+union pmu_pm_set_cfg_cmd_t {
+        union {
+                struct cfg_delay_param_t d_param;
+                struct cfg_trig_param_t t_param;
+        } pmu2_params;
+        u32 pmu_pm_set_cfg_cmd_value;
+};
+
+#ifdef FUTURE_PATCH
+extern int mrst_s0i3_entry(u32 regval, u32 *regaddr);
+#else
+static inline int mrst_s0i3_entry(u32 regval, u32 *regaddr) { return -1; }
+#endif
+#endif
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 60aeeb56948f..a9627e2e3295 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -9,6 +9,7 @@
 #include <linux/mm.h>
 #include <linux/pm.h>
 #include <linux/memblock.h>
+#include <linux/cpuidle.h>
 
 #include <asm/elf.h>
 #include <asm/vdso.h>
@@ -426,7 +427,7 @@ void __init xen_arch_setup(void)
 #ifdef CONFIG_X86_32
         boot_cpu_data.hlt_works_ok = 1;
 #endif
-        pm_idle = default_idle;
+        disable_cpuidle();
         boot_option_idle_override = IDLE_HALT;
 
         fiddle_vdso();
diff --git a/block/blk-core.c b/block/blk-core.c
index b850bedad229..b627558c461f 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1368,8 +1368,10 @@ static bool should_fail_request(struct hd_struct *part, unsigned int bytes)
 
 static int __init fail_make_request_debugfs(void)
 {
-        return init_fault_attr_dentries(&fail_make_request,
-                                        "fail_make_request");
+        struct dentry *dir = fault_create_debugfs_attr("fail_make_request",
+                                                NULL, &fail_make_request);
+
+        return IS_ERR(dir) ? PTR_ERR(dir) : 0;
 }
 
 late_initcall(fail_make_request_debugfs);
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 4f0c06c7a338..780354888958 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -28,7 +28,10 @@ int blk_should_fake_timeout(struct request_queue *q)
 
 static int __init fail_io_timeout_debugfs(void)
 {
-        return init_fault_attr_dentries(&fail_io_timeout, "fail_io_timeout");
+        struct dentry *dir = fault_create_debugfs_attr("fail_io_timeout",
+                                                NULL, &fail_io_timeout);
+
+        return IS_ERR(dir) ? PTR_ERR(dir) : 0;
 }
 
 late_initcall(fail_io_timeout_debugfs);
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 73863d86f022..76dc02f15574 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -126,6 +126,12 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_copy_dsdt_locally, FALSE);
  */
 u8 ACPI_INIT_GLOBAL(acpi_gbl_truncate_io_addresses, FALSE);
 
+/*
+ * Disable runtime checking and repair of values returned by control methods.
+ * Use only if the repair is causing a problem on a particular machine.
+ */
+u8 ACPI_INIT_GLOBAL(acpi_gbl_disable_auto_repair, FALSE);
+
 /* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */
 
 struct acpi_table_fadt acpi_gbl_FADT;
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index c7f743ca395b..5552125d8340 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -357,6 +357,7 @@ struct acpi_predefined_data {
         char *pathname;
         const union acpi_predefined_info *predefined;
         union acpi_operand_object *parent_package;
+        struct acpi_namespace_node *node;
         u32 flags;
         u8 node_flags;
 };
diff --git a/drivers/acpi/acpica/acpredef.h b/drivers/acpi/acpica/acpredef.h
index 94e73c97cf85..c445cca490ea 100644
--- a/drivers/acpi/acpica/acpredef.h
+++ b/drivers/acpi/acpica/acpredef.h
@@ -468,6 +468,7 @@ static const union acpi_predefined_info predefined_names[] =
         {{"_SWS", 0, ACPI_RTYPE_INTEGER}},
         {{"_TC1", 0, ACPI_RTYPE_INTEGER}},
         {{"_TC2", 0, ACPI_RTYPE_INTEGER}},
+        {{"_TDL", 0, ACPI_RTYPE_INTEGER}},
         {{"_TIP", 1, ACPI_RTYPE_INTEGER}},
         {{"_TIV", 1, ACPI_RTYPE_INTEGER}},
         {{"_TMP", 0, ACPI_RTYPE_INTEGER}},
diff --git a/drivers/acpi/acpica/nspredef.c b/drivers/acpi/acpica/nspredef.c
index 9fb03fa8ffde..c845c8089f39 100644
--- a/drivers/acpi/acpica/nspredef.c
+++ b/drivers/acpi/acpica/nspredef.c
@@ -193,14 +193,20 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
         }
 
         /*
-         * 1) We have a return value, but if one wasn't expected, just exit, this is
-         * not a problem. For example, if the "Implicit Return" feature is
-         * enabled, methods will always return a value.
+         * Return value validation and possible repair.
          *
-         * 2) If the return value can be of any type, then we cannot perform any
-         * validation, exit.
+         * 1) Don't perform return value validation/repair if this feature
+         * has been disabled via a global option.
+         *
+         * 2) We have a return value, but if one wasn't expected, just exit,
+         * this is not a problem. For example, if the "Implicit Return"
+         * feature is enabled, methods will always return a value.
+         *
+         * 3) If the return value can be of any type, then we cannot perform
+         * any validation, just exit.
          */
-        if ((!predefined->info.expected_btypes) ||
+        if (acpi_gbl_disable_auto_repair ||
+            (!predefined->info.expected_btypes) ||
             (predefined->info.expected_btypes == ACPI_RTYPE_ALL)) {
                 goto cleanup;
         }
@@ -212,6 +218,7 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
                 goto cleanup;
         }
         data->predefined = predefined;
+        data->node = node;
         data->node_flags = node->flags;
         data->pathname = pathname;
 
diff --git a/drivers/acpi/acpica/nsrepair2.c b/drivers/acpi/acpica/nsrepair2.c
index 973883babee1..024c4f263f87 100644
--- a/drivers/acpi/acpica/nsrepair2.c
+++ b/drivers/acpi/acpica/nsrepair2.c
@@ -503,6 +503,21 @@ acpi_ns_repair_TSS(struct acpi_predefined_data *data,
 {
         union acpi_operand_object *return_object = *return_object_ptr;
         acpi_status status;
+        struct acpi_namespace_node *node;
+
+        /*
+         * We can only sort the _TSS return package if there is no _PSS in the
+         * same scope. This is because if _PSS is present, the ACPI specification
+         * dictates that the _TSS Power Dissipation field is to be ignored, and
+         * therefore some BIOSs leave garbage values in the _TSS Power field(s).
+         * In this case, it is best to just return the _TSS package as-is.
+         * (May, 2011)
+         */
+        status =
+            acpi_ns_get_node(data->node, "^_PSS", ACPI_NS_NO_UPSEARCH, &node);
+        if (ACPI_SUCCESS(status)) {
+                return (AE_OK);
+        }
 
         status = acpi_ns_check_sorted_list(data, return_object, 5, 1,
                                            ACPI_SORT_DESCENDING,
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 48db0944ce4a..62365f6075dd 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -126,12 +126,29 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
         }
 
         /*
-         * Originally, we checked the table signature for "SSDT" or "PSDT" here.
-         * Next, we added support for OEMx tables, signature "OEM".
-         * Valid tables were encountered with a null signature, so we've just
-         * given up on validating the signature, since it seems to be a waste
-         * of code. The original code was removed (05/2008).
+         * Validate the incoming table signature.
+         *
+         * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
+         * 2) We added support for OEMx tables, signature "OEM".
+         * 3) Valid tables were encountered with a null signature, so we just
+         *    gave up on validating the signature, (05/2008).
+         * 4) We encountered non-AML tables such as the MADT, which caused
+         *    interpreter errors and kernel faults. So now, we once again allow
+         *    only "SSDT", "OEMx", and now, also a null signature. (05/2011).
          */
+        if ((table_desc->pointer->signature[0] != 0x00) &&
+            (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
+            && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
+                ACPI_ERROR((AE_INFO,
+                            "Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
+                            acpi_ut_valid_acpi_name(*(u32 *)table_desc->
+                                                    pointer->
+                                                    signature) ? table_desc->
+                            pointer->signature : "????",
+                            *(u32 *)table_desc->pointer->signature));
+
+                return_ACPI_STATUS(AE_BAD_SIGNATURE);
+        }
 
         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 
diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index f739a70b1c70..c34aa51af4ee 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -10,9 +10,11 @@ config ACPI_APEI
           error injection.
 
 config ACPI_APEI_GHES
-        tristate "APEI Generic Hardware Error Source"
+        bool "APEI Generic Hardware Error Source"
         depends on ACPI_APEI && X86
         select ACPI_HED
+        select LLIST
+        select GENERIC_ALLOCATOR
         help
           Generic Hardware Error Source provides a way to report
           platform hardware errors (such as that from chipset). It
@@ -30,6 +32,13 @@ config ACPI_APEI_PCIEAER
           PCIe AER errors may be reported via APEI firmware first mode.
           Turn on this option to enable the corresponding support.
 
+config ACPI_APEI_MEMORY_FAILURE
+        bool "APEI memory error recovering support"
+        depends on ACPI_APEI && MEMORY_FAILURE
+        help
+          Memory errors may be reported via APEI firmware first mode.
+          Turn on this option to enable the memory recovering support.
+
 config ACPI_APEI_EINJ
         tristate "APEI Error INJection (EINJ)"
         depends on ACPI_APEI && DEBUG_FS
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index 4a904a4bf05f..8041248fce9b 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -157,9 +157,10 @@ EXPORT_SYMBOL_GPL(apei_exec_noop);
  * Interpret the specified action. Go through whole action table,
  * execute all instructions belong to the action.
  */
-int apei_exec_run(struct apei_exec_context *ctx, u8 action)
+int __apei_exec_run(struct apei_exec_context *ctx, u8 action,
+                    bool optional)
 {
-        int rc;
+        int rc = -ENOENT;
         u32 i, ip;
         struct acpi_whea_header *entry;
         apei_exec_ins_func_t run;
@@ -198,9 +199,9 @@ rewind:
                         goto rewind;
         }
 
-        return 0;
+        return !optional && rc < 0 ? rc : 0;
 }
-EXPORT_SYMBOL_GPL(apei_exec_run);
+EXPORT_SYMBOL_GPL(__apei_exec_run);
 
 typedef int (*apei_exec_entry_func_t)(struct apei_exec_context *ctx,
                                       struct acpi_whea_header *entry,
@@ -603,3 +604,29 @@ struct dentry *apei_get_debugfs_dir(void)
         return dapei;
 }
 EXPORT_SYMBOL_GPL(apei_get_debugfs_dir);
+
+int apei_osc_setup(void)
+{
+        static u8 whea_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c";
+        acpi_handle handle;
+        u32 capbuf[3];
+        struct acpi_osc_context context = {
+                .uuid_str       = whea_uuid_str,
+                .rev            = 1,
+                .cap.length     = sizeof(capbuf),
+                .cap.pointer    = capbuf,
+        };
+
+        capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
+        capbuf[OSC_SUPPORT_TYPE] = 0;
+        capbuf[OSC_CONTROL_TYPE] = 0;
+
+        if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))
+            || ACPI_FAILURE(acpi_run_osc(handle, &context)))
+                return -EIO;
+        else {
+                kfree(context.ret.pointer);
+                return 0;
+        }
+}
+EXPORT_SYMBOL_GPL(apei_osc_setup);
diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
index ef0581f2094d..f57050e7a5e7 100644
--- a/drivers/acpi/apei/apei-internal.h
+++ b/drivers/acpi/apei/apei-internal.h
@@ -50,7 +50,18 @@ static inline u64 apei_exec_ctx_get_output(struct apei_exec_context *ctx)
         return ctx->value;
 }
 
-int apei_exec_run(struct apei_exec_context *ctx, u8 action);
+int __apei_exec_run(struct apei_exec_context *ctx, u8 action, bool optional);
+
+static inline int apei_exec_run(struct apei_exec_context *ctx, u8 action)
+{
+        return __apei_exec_run(ctx, action, 0);
+}
+
+/* It is optional whether the firmware provides the action */
+static inline int apei_exec_run_optional(struct apei_exec_context *ctx, u8 action)
+{
+        return __apei_exec_run(ctx, action, 1);
+}
 
 /* Common instruction implementation */
 
@@ -113,4 +124,6 @@ void apei_estatus_print(const char *pfx,
                         const struct acpi_hest_generic_status *estatus);
 int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus);
 int apei_estatus_check(const struct acpi_hest_generic_status *estatus);
+
+int apei_osc_setup(void);
 #endif
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index f74b2ea11f21..589b96c38704 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -46,7 +46,8 @@
  * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
  * EINJ table through an unpublished extension. Use with caution as
  * most will ignore the parameter and make their own choice of address
- * for error injection.
+ * for error injection.  This extension is used only if
+ * param_extension module parameter is specified.
  */
 struct einj_parameter {
         u64 type;
@@ -65,6 +66,9 @@ struct einj_parameter {
         ((struct acpi_whea_header *)((char *)(tab) +                    \
                                     sizeof(struct acpi_table_einj)))
 
+static bool param_extension;
+module_param(param_extension, bool, 0);
+
 static struct acpi_table_einj *einj_tab;
 
 static struct apei_resources einj_resources;
@@ -285,7 +289,7 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
 
         einj_exec_ctx_init(&ctx);
 
-        rc = apei_exec_run(&ctx, ACPI_EINJ_BEGIN_OPERATION);
+        rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION);
         if (rc)
                 return rc;
         apei_exec_ctx_set_input(&ctx, type);
@@ -323,7 +327,7 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
         rc = __einj_error_trigger(trigger_paddr);
         if (rc)
                 return rc;
-        rc = apei_exec_run(&ctx, ACPI_EINJ_END_OPERATION);
+        rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);
 
         return rc;
 }
@@ -489,14 +493,6 @@ static int __init einj_init(void)
                                      einj_debug_dir, NULL, &error_type_fops);
         if (!fentry)
                 goto err_cleanup;
-        fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
-                                    einj_debug_dir, &error_param1);
-        if (!fentry)
-                goto err_cleanup;
-        fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
-                                    einj_debug_dir, &error_param2);
-        if (!fentry)
-                goto err_cleanup;
         fentry = debugfs_create_file("error_inject", S_IWUSR,
                                      einj_debug_dir, NULL, &error_inject_fops);
         if (!fentry)
@@ -513,12 +509,23 @@ static int __init einj_init(void)
         rc = apei_exec_pre_map_gars(&ctx);
         if (rc)
                 goto err_release;
-        param_paddr = einj_get_parameter_address();
-        if (param_paddr) {
-                einj_param = ioremap(param_paddr, sizeof(*einj_param));
-                rc = -ENOMEM;
-                if (!einj_param)
-                        goto err_unmap;
+        if (param_extension) {
+                param_paddr = einj_get_parameter_address();
+                if (param_paddr) {
+                        einj_param = ioremap(param_paddr, sizeof(*einj_param));
+                        rc = -ENOMEM;
+                        if (!einj_param)
+                                goto err_unmap;
+                        fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
+                                                    einj_debug_dir, &error_param1);
+                        if (!fentry)
+                                goto err_unmap;
+                        fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
+                                                    einj_debug_dir, &error_param2);
+                        if (!fentry)
+                                goto err_unmap;
+                } else
+                        pr_warn(EINJ_PFX "Parameter extension is not supported.\n");
         }
 
         pr_info(EINJ_PFX "Error INJection is initialized.\n");
@@ -526,6 +533,8 @@ static int __init einj_init(void)
         return 0;
 
 err_unmap:
+        if (einj_param)
+                iounmap(einj_param);
         apei_exec_post_unmap_gars(&ctx);
 err_release:
         apei_resources_release(&einj_resources);
diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index a4cfb64c86a1..903549df809b 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -33,7 +33,7 @@
 
 #define ERST_DBG_PFX                    "ERST DBG: "
 
-#define ERST_DBG_RECORD_LEN_MAX         4096
+#define ERST_DBG_RECORD_LEN_MAX         0x4000
 
 static void *erst_dbg_buf;
 static unsigned int erst_dbg_buf_len;
@@ -213,6 +213,10 @@ static struct miscdevice erst_dbg_dev = {
 
 static __init int erst_dbg_init(void)
 {
+        if (erst_disable) {
+                pr_info(ERST_DBG_PFX "ERST support is disabled.\n");
+                return -ENODEV;
+        }
         return misc_register(&erst_dbg_dev);
 }
 
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 6053f4780df9..2ca59dc69f7f 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -642,7 +642,7 @@ static int __erst_write_to_storage(u64 offset)
         int rc;
 
         erst_exec_ctx_init(&ctx);
-        rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_WRITE);
+        rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_WRITE);
         if (rc)
                 return rc;
         apei_exec_ctx_set_input(&ctx, offset);
@@ -666,7 +666,7 @@ static int __erst_write_to_storage(u64 offset)
         if (rc)
                 return rc;
         val = apei_exec_ctx_get_output(&ctx);
-        rc = apei_exec_run(&ctx, ACPI_ERST_END);
+        rc = apei_exec_run_optional(&ctx, ACPI_ERST_END);
         if (rc)
                 return rc;
 
@@ -681,7 +681,7 @@ static int __erst_read_from_storage(u64 record_id, u64 offset)
         int rc;
 
         erst_exec_ctx_init(&ctx);
-        rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_READ);
+        rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_READ);
         if (rc)
                 return rc;
         apei_exec_ctx_set_input(&ctx, offset);
@@ -709,7 +709,7 @@ static int __erst_read_from_storage(u64 record_id, u64 offset)
         if (rc)
                 return rc;
         val = apei_exec_ctx_get_output(&ctx);
-        rc = apei_exec_run(&ctx, ACPI_ERST_END);
+        rc = apei_exec_run_optional(&ctx, ACPI_ERST_END);
         if (rc)
                 return rc;
 
@@ -724,7 +724,7 @@ static int __erst_clear_from_storage(u64 record_id)
         int rc;
 
         erst_exec_ctx_init(&ctx);
-        rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_CLEAR);
+        rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_CLEAR);
         if (rc)
                 return rc;
         apei_exec_ctx_set_input(&ctx, record_id);
@@ -748,7 +748,7 @@ static int __erst_clear_from_storage(u64 record_id)
         if (rc)
                 return rc;
         val = apei_exec_ctx_get_output(&ctx);
-        rc = apei_exec_run(&ctx, ACPI_ERST_END);
+        rc = apei_exec_run_optional(&ctx, ACPI_ERST_END);
         if (rc)
                 return rc;
 
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index f703b2881153..0784f99a4665 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -12,7 +12,7 @@
  * For more information about Generic Hardware Error Source, please
  * refer to ACPI Specification version 4.0, section 17.3.2.6
  *
- * Copyright 2010 Intel Corp.
+ * Copyright 2010,2011 Intel Corp.
  *   Author: Huang Ying <ying.huang@intel.com>
  *
  * This program is free software; you can redistribute it and/or
@@ -42,6 +42,9 @@
 #include <linux/mutex.h>
 #include <linux/ratelimit.h>
 #include <linux/vmalloc.h>
+#include <linux/irq_work.h>
+#include <linux/llist.h>
+#include <linux/genalloc.h>
 #include <acpi/apei.h>
 #include <acpi/atomicio.h>
 #include <acpi/hed.h>
@@ -53,6 +56,30 @@
 #define GHES_PFX        "GHES: "
 
 #define GHES_ESTATUS_MAX_SIZE           65536
+#define GHES_ESOURCE_PREALLOC_MAX_SIZE  65536
+
+#define GHES_ESTATUS_POOL_MIN_ALLOC_ORDER 3
+
+/* This is just an estimation for memory pool allocation */
+#define GHES_ESTATUS_CACHE_AVG_SIZE     512
+
+#define GHES_ESTATUS_CACHES_SIZE        4
+
+#define GHES_ESTATUS_IN_CACHE_MAX_NSEC  10000000000ULL
+/* Prevent too many caches are allocated because of RCU */
+#define GHES_ESTATUS_CACHE_ALLOCED_MAX  (GHES_ESTATUS_CACHES_SIZE * 3 / 2)
+
+#define GHES_ESTATUS_CACHE_LEN(estatus_len)                     \
+        (sizeof(struct ghes_estatus_cache) + (estatus_len))
+#define GHES_ESTATUS_FROM_CACHE(estatus_cache)                  \
+        ((struct acpi_hest_generic_status *)                    \
+         ((struct ghes_estatus_cache *)(estatus_cache) + 1))
+
+#define GHES_ESTATUS_NODE_LEN(estatus_len)                      \
+        (sizeof(struct ghes_estatus_node) + (estatus_len))
+#define GHES_ESTATUS_FROM_NODE(estatus_node)                            \
+        ((struct acpi_hest_generic_status *)                            \
+         ((struct ghes_estatus_node *)(estatus_node) + 1))
 
 /*
  * One struct ghes is created for each generic hardware error source.
@@ -77,6 +104,22 @@ struct ghes {
         };
 };
 
+struct ghes_estatus_node {
+        struct llist_node llnode;
+        struct acpi_hest_generic *generic;
+};
+
+struct ghes_estatus_cache {
+        u32 estatus_len;
+        atomic_t count;
+        struct acpi_hest_generic *generic;
+        unsigned long long time_in;
+        struct rcu_head rcu;
+};
+
+int ghes_disable;
+module_param_named(disable, ghes_disable, bool, 0);
+
 static int ghes_panic_timeout   __read_mostly = 30;
 
 /*
@@ -121,6 +164,22 @@ static struct vm_struct *ghes_ioremap_area;
 static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi);
 static DEFINE_SPINLOCK(ghes_ioremap_lock_irq);
 
+/*
+ * printk is not safe in NMI context.  So in NMI handler, we allocate
+ * required memory from lock-less memory allocator
+ * (ghes_estatus_pool), save estatus into it, put them into lock-less
+ * list (ghes_estatus_llist), then delay printk into IRQ context via
+ * irq_work (ghes_proc_irq_work).  ghes_estatus_size_request record
+ * required pool size by all NMI error source.
+ */
+static struct gen_pool *ghes_estatus_pool;
+static unsigned long ghes_estatus_pool_size_request;
+static struct llist_head ghes_estatus_llist;
+static struct irq_work ghes_proc_irq_work;
+
+struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE];
+static atomic_t ghes_estatus_cache_alloced;
+
 static int ghes_ioremap_init(void)
 {
         ghes_ioremap_area = __get_vm_area(PAGE_SIZE * GHES_IOREMAP_PAGES,
@@ -180,6 +239,55 @@ static void ghes_iounmap_irq(void __iomem *vaddr_ptr)
         __flush_tlb_one(vaddr);
 }
 
+static int ghes_estatus_pool_init(void)
+{
+        ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1);
+        if (!ghes_estatus_pool)
+                return -ENOMEM;
+        return 0;
+}
+
+static void ghes_estatus_pool_free_chunk_page(struct gen_pool *pool,
+                                              struct gen_pool_chunk *chunk,
+                                              void *data)
+{
+        free_page(chunk->start_addr);
+}
+
+static void ghes_estatus_pool_exit(void)
+{
+        gen_pool_for_each_chunk(ghes_estatus_pool,
+                                ghes_estatus_pool_free_chunk_page, NULL);
+        gen_pool_destroy(ghes_estatus_pool);
+}
+
+static int ghes_estatus_pool_expand(unsigned long len)
+{
+        unsigned long i, pages, size, addr;
+        int ret;
+
+        ghes_estatus_pool_size_request += PAGE_ALIGN(len);
+        size = gen_pool_size(ghes_estatus_pool);
+        if (size >= ghes_estatus_pool_size_request)
+                return 0;
+        pages = (ghes_estatus_pool_size_request - size) / PAGE_SIZE;
+        for (i = 0; i < pages; i++) {
+                addr = __get_free_page(GFP_KERNEL);
+                if (!addr)
+                        return -ENOMEM;
+                ret = gen_pool_add(ghes_estatus_pool, addr, PAGE_SIZE, -1);
+                if (ret)
+                        return ret;
+        }
+
+        return 0;
+}
+
+static void ghes_estatus_pool_shrink(unsigned long len)
+{
+        ghes_estatus_pool_size_request -= PAGE_ALIGN(len);
+}
+
 static struct ghes *ghes_new(struct acpi_hest_generic *generic)
 {
         struct ghes *ghes;
@@ -341,43 +449,196 @@ static void ghes_clear_estatus(struct ghes *ghes)
         ghes->flags &= ~GHES_TO_CLEAR;
 }
 
-static void ghes_do_proc(struct ghes *ghes)
+static void ghes_do_proc(const struct acpi_hest_generic_status *estatus)
 {
-        int sev, processed = 0;
+        int sev, sec_sev;
         struct acpi_hest_generic_data *gdata;
 
-        sev = ghes_severity(ghes->estatus->error_severity);
-        apei_estatus_for_each_section(ghes->estatus, gdata) {
-#ifdef CONFIG_X86_MCE
+        sev = ghes_severity(estatus->error_severity);
+        apei_estatus_for_each_section(estatus, gdata) {
+                sec_sev = ghes_severity(gdata->error_severity);
                 if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
                                  CPER_SEC_PLATFORM_MEM)) {
-                        apei_mce_report_mem_error(
-                                sev == GHES_SEV_CORRECTED,
-                                (struct cper_sec_mem_err *)(gdata+1));
-                        processed = 1;
-                }
+                        struct cper_sec_mem_err *mem_err;
+                        mem_err = (struct cper_sec_mem_err *)(gdata+1);
+#ifdef CONFIG_X86_MCE
+                        apei_mce_report_mem_error(sev == GHES_SEV_CORRECTED,
+                                                  mem_err);
 #endif
+#ifdef CONFIG_ACPI_APEI_MEMORY_FAILURE
+                        if (sev == GHES_SEV_RECOVERABLE &&
+                            sec_sev == GHES_SEV_RECOVERABLE &&
+                            mem_err->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS) {
+                                unsigned long pfn;
+                                pfn = mem_err->physical_addr >> PAGE_SHIFT;
+                                memory_failure_queue(pfn, 0, 0);
+                        }
+#endif
+                }
         }
 }
 
-static void ghes_print_estatus(const char *pfx, struct ghes *ghes)
+static void __ghes_print_estatus(const char *pfx,
+                                 const struct acpi_hest_generic *generic,
+                                 const struct acpi_hest_generic_status *estatus)
 {
-        /* Not more than 2 messages every 5 seconds */
-        static DEFINE_RATELIMIT_STATE(ratelimit, 5*HZ, 2);
-
         if (pfx == NULL) {
-                if (ghes_severity(ghes->estatus->error_severity) <=
+                if (ghes_severity(estatus->error_severity) <=
                     GHES_SEV_CORRECTED)
                         pfx = KERN_WARNING HW_ERR;
                 else
                         pfx = KERN_ERR HW_ERR;
         }
-        if (__ratelimit(&ratelimit)) {
-                printk(
-        "%s""Hardware error from APEI Generic Hardware Error Source: %d\n",
-        pfx, ghes->generic->header.source_id);
-                apei_estatus_print(pfx, ghes->estatus);
+        printk("%s""Hardware error from APEI Generic Hardware Error Source: %d\n",
+               pfx, generic->header.source_id);
+        apei_estatus_print(pfx, estatus);
+}
+
+static int ghes_print_estatus(const char *pfx,
+                              const struct acpi_hest_generic *generic,
+                              const struct acpi_hest_generic_status *estatus)
+{
+        /* Not more than 2 messages every 5 seconds */
+        static DEFINE_RATELIMIT_STATE(ratelimit_corrected, 5*HZ, 2);
+        static DEFINE_RATELIMIT_STATE(ratelimit_uncorrected, 5*HZ, 2);
+        struct ratelimit_state *ratelimit;
+
+        if (ghes_severity(estatus->error_severity) <= GHES_SEV_CORRECTED)
+                ratelimit = &ratelimit_corrected;
+        else
+                ratelimit = &ratelimit_uncorrected;
+        if (__ratelimit(ratelimit)) {
+                __ghes_print_estatus(pfx, generic, estatus);
+                return 1;
         }
+        return 0;
+}
+
+/*
+ * GHES error status reporting throttle, to report more kinds of
+ * errors, instead of just most frequently occurred errors.
+ */
+static int ghes_estatus_cached(struct acpi_hest_generic_status *estatus)
+{
+        u32 len;
+        int i, cached = 0;
+        unsigned long long now;
+        struct ghes_estatus_cache *cache;
+        struct acpi_hest_generic_status *cache_estatus;
+
+        len = apei_estatus_len(estatus);
+        rcu_read_lock();
+        for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) {
+                cache = rcu_dereference(ghes_estatus_caches[i]);
+                if (cache == NULL)
+                        continue;
+                if (len != cache->estatus_len)
+                        continue;
+                cache_estatus = GHES_ESTATUS_FROM_CACHE(cache);
+                if (memcmp(estatus, cache_estatus, len))
+                        continue;
+                atomic_inc(&cache->count);
+                now = sched_clock();
+                if (now - cache->time_in < GHES_ESTATUS_IN_CACHE_MAX_NSEC)
+                        cached = 1;
+                break;
+        }
+        rcu_read_unlock();
+        return cached;
+}
+
+static struct ghes_estatus_cache *ghes_estatus_cache_alloc(
+        struct acpi_hest_generic *generic,
+        struct acpi_hest_generic_status *estatus)
+{
+        int alloced;
+        u32 len, cache_len;
+        struct ghes_estatus_cache *cache;
+        struct acpi_hest_generic_status *cache_estatus;
+
+        alloced = atomic_add_return(1, &ghes_estatus_cache_alloced);
+        if (alloced > GHES_ESTATUS_CACHE_ALLOCED_MAX) {
+                atomic_dec(&ghes_estatus_cache_alloced);
+                return NULL;
+        }
+        len = apei_estatus_len(estatus);
+        cache_len = GHES_ESTATUS_CACHE_LEN(len);
+        cache = (void *)gen_pool_alloc(ghes_estatus_pool, cache_len);
+        if (!cache) {
+                atomic_dec(&ghes_estatus_cache_alloced);
+                return NULL;
+        }
+        cache_estatus = GHES_ESTATUS_FROM_CACHE(cache);
+        memcpy(cache_estatus, estatus, len);
+        cache->estatus_len = len;
+        atomic_set(&cache->count, 0);
+        cache->generic = generic;
+        cache->time_in = sched_clock();
+        return cache;
+}
+
+static void ghes_estatus_cache_free(struct ghes_estatus_cache *cache)
+{
+        u32 len;
+
+        len = apei_estatus_len(GHES_ESTATUS_FROM_CACHE(cache));
+        len = GHES_ESTATUS_CACHE_LEN(len);
+        gen_pool_free(ghes_estatus_pool, (unsigned long)cache, len);
+        atomic_dec(&ghes_estatus_cache_alloced);
+}
+
+static void ghes_estatus_cache_rcu_free(struct rcu_head *head)
+{
+        struct ghes_estatus_cache *cache;
+
+        cache = container_of(head, struct ghes_estatus_cache, rcu);
+        ghes_estatus_cache_free(cache);
+}
+
+static void ghes_estatus_cache_add(
+        struct acpi_hest_generic *generic,
+        struct acpi_hest_generic_status *estatus)
+{
+        int i, slot = -1, count;
+        unsigned long long now, duration, period, max_period = 0;
+        struct ghes_estatus_cache *cache, *slot_cache = NULL, *new_cache;
+
+        new_cache = ghes_estatus_cache_alloc(generic, estatus);
+        if (new_cache == NULL)
+                return;
+        rcu_read_lock();
+        now = sched_clock();
+        for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) {
+                cache = rcu_dereference(ghes_estatus_caches[i]);
+                if (cache == NULL) {
+                        slot = i;
+                        slot_cache = NULL;
+                        break;
+                }
+                duration = now - cache->time_in;
+                if (duration >= GHES_ESTATUS_IN_CACHE_MAX_NSEC) {
+                        slot = i;
+                        slot_cache = cache;
+                        break;
+                }
+                count = atomic_read(&cache->count);
+                period = duration;
+                do_div(period, (count + 1));
+                if (period > max_period) {
+                        max_period = period;
+                        slot = i;
+                        slot_cache = cache;
+                }
+        }
+        /* new_cache must be put into array after its contents are written */
+        smp_wmb();
+        if (slot != -1 && cmpxchg(ghes_estatus_caches + slot,
+                                  slot_cache, new_cache) == slot_cache) {
+                if (slot_cache)
+                        call_rcu(&slot_cache->rcu, ghes_estatus_cache_rcu_free);
+        } else
+                ghes_estatus_cache_free(new_cache);
+        rcu_read_unlock();
 }
 
 static int ghes_proc(struct ghes *ghes)
@@ -387,9 +648,11 @@ static int ghes_proc(struct ghes *ghes)
         rc = ghes_read_estatus(ghes, 0);
         if (rc)
                 goto out;
-        ghes_print_estatus(NULL, ghes);
-        ghes_do_proc(ghes);
-
+        if (!ghes_estatus_cached(ghes->estatus)) {
+                if (ghes_print_estatus(NULL, ghes->generic, ghes->estatus))
+                        ghes_estatus_cache_add(ghes->generic, ghes->estatus);
+        }
+        ghes_do_proc(ghes->estatus);
 out:
         ghes_clear_estatus(ghes);
         return 0;
@@ -447,6 +710,45 @@ static int ghes_notify_sci(struct notifier_block *this,
         return ret;
 }
 
+static void ghes_proc_in_irq(struct irq_work *irq_work)
+{
+        struct llist_node *llnode, *next, *tail = NULL;
+        struct ghes_estatus_node *estatus_node;
+        struct acpi_hest_generic *generic;
+        struct acpi_hest_generic_status *estatus;
+        u32 len, node_len;
+
+        /*
+         * Because the time order of estatus in list is reversed,
+         * revert it back to proper order.
+         */
+        llnode = llist_del_all(&ghes_estatus_llist);
+        while (llnode) {
+                next = llnode->next;
+                llnode->next = tail;
+                tail = llnode;
+                llnode = next;
+        }
+        llnode = tail;
+        while (llnode) {
+                next = llnode->next;
+                estatus_node = llist_entry(llnode, struct ghes_estatus_node,
+                                           llnode);
+                estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
+                len = apei_estatus_len(estatus);
+                node_len = GHES_ESTATUS_NODE_LEN(len);
+                ghes_do_proc(estatus);
+                if (!ghes_estatus_cached(estatus)) {
+                        generic = estatus_node->generic;
+                        if (ghes_print_estatus(NULL, generic, estatus))
+                                ghes_estatus_cache_add(generic, estatus);
+                }
+                gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node,
+                              node_len);
+                llnode = next;
+        }
+}
+
 static int ghes_notify_nmi(struct notifier_block *this,
                                   unsigned long cmd, void *data)
 {
@@ -476,7 +778,8 @@ static int ghes_notify_nmi(struct notifier_block *this,
 
         if (sev_global >= GHES_SEV_PANIC) {
                 oops_begin();
-                ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global);
+                __ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global->generic,
+                                     ghes_global->estatus);
                 /* reboot to log the error! */
                 if (panic_timeout == 0)
                         panic_timeout = ghes_panic_timeout;
@@ -484,12 +787,34 @@ static int ghes_notify_nmi(struct notifier_block *this,
         }
 
         list_for_each_entry_rcu(ghes, &ghes_nmi, list) {
+#ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+                u32 len, node_len;
+                struct ghes_estatus_node *estatus_node;
+                struct acpi_hest_generic_status *estatus;
+#endif
                 if (!(ghes->flags & GHES_TO_CLEAR))
                         continue;
-                /* Do not print estatus because printk is not NMI safe */
-                ghes_do_proc(ghes);
+#ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+                if (ghes_estatus_cached(ghes->estatus))
+                        goto next;
+                /* Save estatus for further processing in IRQ context */
+                len = apei_estatus_len(ghes->estatus);
+                node_len = GHES_ESTATUS_NODE_LEN(len);
+                estatus_node = (void *)gen_pool_alloc(ghes_estatus_pool,
+                                                      node_len);
+                if (estatus_node) {
+                        estatus_node->generic = ghes->generic;
+                        estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
+                        memcpy(estatus, ghes->estatus, len);
+                        llist_add(&estatus_node->llnode, &ghes_estatus_llist);
+                }
+next:
+#endif
                 ghes_clear_estatus(ghes);
         }
+#ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        irq_work_queue(&ghes_proc_irq_work);
+#endif
 
 out:
         raw_spin_unlock(&ghes_nmi_lock);
@@ -504,10 +829,26 @@ static struct notifier_block ghes_notifier_nmi = {
         .notifier_call = ghes_notify_nmi,
 };
 
+static unsigned long ghes_esource_prealloc_size(
+        const struct acpi_hest_generic *generic)
+{
+        unsigned long block_length, prealloc_records, prealloc_size;
+
+        block_length = min_t(unsigned long, generic->error_block_length,
+                             GHES_ESTATUS_MAX_SIZE);
+        prealloc_records = max_t(unsigned long,
+                                 generic->records_to_preallocate, 1);
+        prealloc_size = min_t(unsigned long, block_length * prealloc_records,
+                              GHES_ESOURCE_PREALLOC_MAX_SIZE);
+
+        return prealloc_size;
+}
+
 static int __devinit ghes_probe(struct platform_device *ghes_dev)
 {
         struct acpi_hest_generic *generic;
         struct ghes *ghes = NULL;
+        unsigned long len;
         int rc = -EINVAL;
 
         generic = *(struct acpi_hest_generic **)ghes_dev->dev.platform_data;
@@ -573,6 +914,8 @@ static int __devinit ghes_probe(struct platform_device *ghes_dev)
                 mutex_unlock(&ghes_list_mutex);
                 break;
         case ACPI_HEST_NOTIFY_NMI:
+                len = ghes_esource_prealloc_size(generic);
+                ghes_estatus_pool_expand(len);
                 mutex_lock(&ghes_list_mutex);
                 if (list_empty(&ghes_nmi))
                         register_die_notifier(&ghes_notifier_nmi);
@@ -597,6 +940,7 @@ static int __devexit ghes_remove(struct platform_device *ghes_dev)
 {
         struct ghes *ghes;
         struct acpi_hest_generic *generic;
+        unsigned long len;
 
         ghes = platform_get_drvdata(ghes_dev);
         generic = ghes->generic;
@@ -627,6 +971,8 @@ static int __devexit ghes_remove(struct platform_device *ghes_dev)
                  * freed after NMI handler finishes.
                  */
                 synchronize_rcu();
+                len = ghes_esource_prealloc_size(generic);
+                ghes_estatus_pool_shrink(len);
                 break;
         default:
                 BUG();
@@ -662,15 +1008,43 @@ static int __init ghes_init(void)
                 return -EINVAL;
         }
 
+        if (ghes_disable) {
+                pr_info(GHES_PFX "GHES is not enabled!\n");
+                return -EINVAL;
+        }
+
+        init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq);
+
         rc = ghes_ioremap_init();
         if (rc)
                 goto err;
 
-        rc = platform_driver_register(&ghes_platform_driver);
+        rc = ghes_estatus_pool_init();
         if (rc)
                 goto err_ioremap_exit;
 
+        rc = ghes_estatus_pool_expand(GHES_ESTATUS_CACHE_AVG_SIZE *
+                                      GHES_ESTATUS_CACHE_ALLOCED_MAX);
+        if (rc)
+                goto err_pool_exit;
+
+        rc = platform_driver_register(&ghes_platform_driver);
+        if (rc)
+                goto err_pool_exit;
+
+        rc = apei_osc_setup();
+        if (rc == 0 && osc_sb_apei_support_acked)
+                pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n");
+        else if (rc == 0 && !osc_sb_apei_support_acked)
+                pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n");
+        else if (rc && osc_sb_apei_support_acked)
+                pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n");
+        else
+                pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");
+
         return 0;
+err_pool_exit:
+        ghes_estatus_pool_exit();
 err_ioremap_exit:
         ghes_ioremap_exit();
 err:
@@ -680,6 +1054,7 @@ err:
 static void __exit ghes_exit(void)
 {
         platform_driver_unregister(&ghes_platform_driver);
+        ghes_estatus_pool_exit();
         ghes_ioremap_exit();
 }
 
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 181bc2f7bb74..05fee06f4d6e 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -231,16 +231,17 @@ void __init acpi_hest_init(void)
                 goto err;
         }
 
-        rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
-        if (rc)
-                goto err;
-
-        rc = hest_ghes_dev_register(ghes_count);
-        if (!rc) {
-                pr_info(HEST_PFX "Table parsing has been initialized.\n");
-                return;
+        if (!ghes_disable) {
+                rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
+                if (rc)
+                        goto err;
+                rc = hest_ghes_dev_register(ghes_count);
+                if (rc)
+                        goto err;
         }
 
+        pr_info(HEST_PFX "Table parsing has been initialized.\n");
+        return;
 err:
         hest_disable = 1;
 }
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 2c661353e8f2..87c0a8daa99a 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -55,6 +55,9 @@
 #define ACPI_BATTERY_NOTIFY_INFO        0x81
 #define ACPI_BATTERY_NOTIFY_THRESHOLD   0x82
 
+/* Battery power unit: 0 means mW, 1 means mA */
+#define ACPI_BATTERY_POWER_UNIT_MA      1
+
 #define _COMPONENT              ACPI_BATTERY_COMPONENT
 
 ACPI_MODULE_NAME("battery");
@@ -91,11 +94,6 @@ MODULE_DEVICE_TABLE(acpi, battery_device_ids);
 enum {
         ACPI_BATTERY_ALARM_PRESENT,
         ACPI_BATTERY_XINFO_PRESENT,
-        /* For buggy DSDTs that report negative 16-bit values for either
-         * charging or discharging current and/or report 0 as 65536
-         * due to bad math.
-         */
-        ACPI_BATTERY_QUIRK_SIGNED16_CURRENT,
         ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
 };
 
@@ -301,7 +299,8 @@ static enum power_supply_property energy_battery_props[] = {
 #ifdef CONFIG_ACPI_PROCFS_POWER
 inline char *acpi_battery_units(struct acpi_battery *battery)
 {
-        return (battery->power_unit)?"mA":"mW";
+        return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
+                "mA" : "mW";
 }
 #endif
 
@@ -461,9 +460,17 @@ static int acpi_battery_get_state(struct acpi_battery *battery)
         battery->update_time = jiffies;
         kfree(buffer.pointer);
 
-        if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) &&
-            battery->rate_now != -1)
+        /* For buggy DSDTs that report negative 16-bit values for either
+         * charging or discharging current and/or report 0 as 65536
+         * due to bad math.
+         */
+        if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
+                battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
+                (s16)(battery->rate_now) < 0) {
                 battery->rate_now = abs((s16)battery->rate_now);
+                printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate"
+                        " invalid.\n");
+        }
 
         if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
             && battery->capacity_now >= 0 && battery->capacity_now <= 100)
@@ -544,7 +551,7 @@ static int sysfs_add_battery(struct acpi_battery *battery)
 {
         int result;
 
-        if (battery->power_unit) {
+        if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
                 battery->bat.properties = charge_battery_props;
                 battery->bat.num_properties =
                         ARRAY_SIZE(charge_battery_props);
@@ -566,18 +573,16 @@ static int sysfs_add_battery(struct acpi_battery *battery)
 
 static void sysfs_remove_battery(struct acpi_battery *battery)
 {
-        if (!battery->bat.dev)
+        mutex_lock(&battery->lock);
+        if (!battery->bat.dev) {
+                mutex_unlock(&battery->lock);
                 return;
+        }
+
         device_remove_file(battery->bat.dev, &alarm_attr);
         power_supply_unregister(&battery->bat);
         battery->bat.dev = NULL;
-}
-
-static void acpi_battery_quirks(struct acpi_battery *battery)
-{
-        if (dmi_name_in_vendors("Acer") && battery->power_unit) {
-                set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags);
-        }
+        mutex_unlock(&battery->lock);
 }
 
 /*
@@ -592,7 +597,7 @@ static void acpi_battery_quirks(struct acpi_battery *battery)
  *
  * Handle this correctly so that they won't break userspace.
  */
-static void acpi_battery_quirks2(struct acpi_battery *battery)
+static void acpi_battery_quirks(struct acpi_battery *battery)
 {
         if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
                 return ;
@@ -623,13 +628,15 @@ static int acpi_battery_update(struct acpi_battery *battery)
                 result = acpi_battery_get_info(battery);
                 if (result)
                         return result;
-                acpi_battery_quirks(battery);
                 acpi_battery_init_alarm(battery);
         }
-        if (!battery->bat.dev)
-                sysfs_add_battery(battery);
+        if (!battery->bat.dev) {
+                result = sysfs_add_battery(battery);
+                if (result)
+                        return result;
+        }
         result = acpi_battery_get_state(battery);
-        acpi_battery_quirks2(battery);
+        acpi_battery_quirks(battery);
         return result;
 }
 
@@ -863,7 +870,7 @@ DECLARE_FILE_FUNCTIONS(alarm);
                 }, \
         }
 
-static struct battery_file {
+static const struct battery_file {
         struct file_operations ops;
         mode_t mode;
         const char *name;
@@ -948,9 +955,12 @@ static int battery_notify(struct notifier_block *nb,
         struct acpi_battery *battery = container_of(nb, struct acpi_battery,
                                                     pm_nb);
         switch (mode) {
+        case PM_POST_HIBERNATION:
         case PM_POST_SUSPEND:
-                sysfs_remove_battery(battery);
-                sysfs_add_battery(battery);
+                if (battery->bat.dev) {
+                        sysfs_remove_battery(battery);
+                        sysfs_add_battery(battery);
+                }
                 break;
         }
 
@@ -975,25 +985,33 @@ static int acpi_battery_add(struct acpi_device *device)
         if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
                         "_BIX", &handle)))
                 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
-        acpi_battery_update(battery);
+        result = acpi_battery_update(battery);
+        if (result)
+                goto fail;
 #ifdef CONFIG_ACPI_PROCFS_POWER
         result = acpi_battery_add_fs(device);
 #endif
-        if (!result) {
-                printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
-                        ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
-                        device->status.battery_present ? "present" : "absent");
-        } else {
+        if (result) {
 #ifdef CONFIG_ACPI_PROCFS_POWER
                 acpi_battery_remove_fs(device);
 #endif
-                kfree(battery);
+                goto fail;
         }
 
+        printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
+                ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
+                device->status.battery_present ? "present" : "absent");
+
         battery->pm_nb.notifier_call = battery_notify;
         register_pm_notifier(&battery->pm_nb);
 
         return result;
+
+fail:
+        sysfs_remove_battery(battery);
+        mutex_destroy(&battery->lock);
+        kfree(battery);
+        return result;
 }
 
 static int acpi_battery_remove(struct acpi_device *device, int type)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index d1e06c182cdb..437ddbf0c49a 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -39,6 +39,7 @@
 #include <linux/pci.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
+#include <acpi/apei.h>
 #include <linux/dmi.h>
 #include <linux/suspend.h>
 
@@ -519,6 +520,7 @@ out_kfree:
 }
 EXPORT_SYMBOL(acpi_run_osc);
 
+bool osc_sb_apei_support_acked;
 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
 static void acpi_bus_osc_support(void)
 {
@@ -541,11 +543,19 @@ static void acpi_bus_osc_support(void)
 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
         capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
 #endif
+
+        if (!ghes_disable)
+                capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
         if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
                 return;
-        if (ACPI_SUCCESS(acpi_run_osc(handle, &context)))
+        if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
+                u32 *capbuf_ret = context.ret.pointer;
+                if (context.ret.length > OSC_SUPPORT_TYPE)
+                        osc_sb_apei_support_acked =
+                                capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
                 kfree(context.ret.pointer);
-        /* do we need to check the returned cap? Sounds no */
+        }
+        /* do we need to check other returned cap? Sounds no */
 }
 
 /* --------------------------------------------------------------------------
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 1864ad3cf895..19a61136d848 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -77,7 +77,7 @@ struct dock_dependent_device {
         struct list_head list;
         struct list_head hotplug_list;
         acpi_handle handle;
-        struct acpi_dock_ops *ops;
+        const struct acpi_dock_ops *ops;
         void *context;
 };
 
@@ -589,7 +589,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier);
  * the dock driver after _DCK is executed.
  */
 int
-register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops,
+register_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops,
                              void *context)
 {
         struct dock_dependent_device *dd;
diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c
index 05b44201a614..22f918bacd35 100644
--- a/drivers/acpi/ec_sys.c
+++ b/drivers/acpi/ec_sys.c
@@ -92,7 +92,7 @@ static ssize_t acpi_ec_write_io(struct file *f, const char __user *buf,
         return count;
 }
 
-static struct file_operations acpi_ec_io_ops = {
+static const struct file_operations acpi_ec_io_ops = {
         .owner = THIS_MODULE,
         .open  = acpi_ec_open_io,
         .read  = acpi_ec_read_io,
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 467479f07c1f..0f0356ca1a9e 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -110,7 +110,7 @@ fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
         return result;
 }
 
-static struct thermal_cooling_device_ops fan_cooling_ops = {
+static const struct thermal_cooling_device_ops fan_cooling_ops = {
         .get_max_state = fan_get_max_state,
         .get_cur_state = fan_get_cur_state,
         .set_cur_state = fan_set_cur_state,
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 372f9b70f7f4..fa32f584229f 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -155,7 +155,7 @@ static u32 acpi_osi_handler(acpi_string interface, u32 supported)
 {
         if (!strcmp("Linux", interface)) {
 
-                printk(KERN_NOTICE FW_BUG PREFIX
+                printk_once(KERN_NOTICE FW_BUG PREFIX
                         "BIOS _OSI(Linux) query %s%s\n",
                         osi_linux.enable ? "honored" : "ignored",
                         osi_linux.cmdline ? " via cmdline" :
@@ -237,8 +237,23 @@ void acpi_os_vprintf(const char *fmt, va_list args)
 #endif
 }
 
+#ifdef CONFIG_KEXEC
+static unsigned long acpi_rsdp;
+static int __init setup_acpi_rsdp(char *arg)
+{
+        acpi_rsdp = simple_strtoul(arg, NULL, 16);
+        return 0;
+}
+early_param("acpi_rsdp", setup_acpi_rsdp);
+#endif
+
 acpi_physical_address __init acpi_os_get_root_pointer(void)
 {
+#ifdef CONFIG_KEXEC
+        if (acpi_rsdp)
+                return acpi_rsdp;
+#endif
+
         if (efi_enabled) {
                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
                         return efi.acpi20;
@@ -1083,7 +1098,13 @@ struct osi_setup_entry {
         bool enable;
 };
 
-static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX];
+static struct osi_setup_entry __initdata
+                osi_setup_entries[OSI_STRING_ENTRIES_MAX] = {
+        {"Module Device", true},
+        {"Processor Device", true},
+        {"3.0 _SCP Extensions", true},
+        {"Processor Aggregator Device", true},
+};
 
 void __init acpi_osi_setup(char *str)
 {
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index f907cfbfa13c..7f9eba9a0b02 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -303,6 +303,61 @@ void acpi_pci_irq_del_prt(struct pci_bus *bus)
 /* --------------------------------------------------------------------------
                           PCI Interrupt Routing Support
    -------------------------------------------------------------------------- */
+#ifdef CONFIG_X86_IO_APIC
+extern int noioapicquirk;
+extern int noioapicreroute;
+
+static int bridge_has_boot_interrupt_variant(struct pci_bus *bus)
+{
+        struct pci_bus *bus_it;
+
+        for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) {
+                if (!bus_it->self)
+                        return 0;
+                if (bus_it->self->irq_reroute_variant)
+                        return bus_it->self->irq_reroute_variant;
+        }
+        return 0;
+}
+
+/*
+ * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ
+ * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does
+ * during interrupt handling). When this INTx generation cannot be disabled,
+ * we reroute these interrupts to their legacy equivalent to get rid of
+ * spurious interrupts.
+ */
+static int acpi_reroute_boot_interrupt(struct pci_dev *dev,
+                                       struct acpi_prt_entry *entry)
+{
+        if (noioapicquirk || noioapicreroute) {
+                return 0;
+        } else {
+                switch (bridge_has_boot_interrupt_variant(dev->bus)) {
+                case 0:
+                        /* no rerouting necessary */
+                        return 0;
+                case INTEL_IRQ_REROUTE_VARIANT:
+                        /*
+                         * Remap according to INTx routing table in 6700PXH
+                         * specs, intel order number 302628-002, section
+                         * 2.15.2. Other chipsets (80332, ...) have the same
+                         * mapping and are handled here as well.
+                         */
+                        dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy "
+                                 "IRQ %d\n", entry->index,
+                                 (entry->index % 4) + 16);
+                        entry->index = (entry->index % 4) + 16;
+                        return 1;
+                default:
+                        dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy "
+                                 "IRQ: unknown mapping\n", entry->index);
+                        return -1;
+                }
+        }
+}
+#endif /* CONFIG_X86_IO_APIC */
+
 static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
 {
         struct acpi_prt_entry *entry;
@@ -311,6 +366,9 @@ static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
 
         entry = acpi_pci_irq_find_prt_entry(dev, pin);
         if (entry) {
+#ifdef CONFIG_X86_IO_APIC
+                acpi_reroute_boot_interrupt(dev, entry);
+#endif /* CONFIG_X86_IO_APIC */
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
                                   pci_name(dev), pin_name(pin)));
                 return entry;
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index d06078d660ad..2672c798272f 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -485,7 +485,8 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
                 root->secondary.end = 0xFF;
                 printk(KERN_WARNING FW_BUG PREFIX
                        "no secondary bus range in _CRS\n");
-                status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,                                               NULL, &bus);
+                status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
+                                               NULL, &bus);
                 if (ACPI_SUCCESS(status))
                         root->secondary.start = bus;
                 else if (status == AE_NOT_FOUND)
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 79cb65332894..870550d6a4bf 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -244,7 +244,7 @@ processor_set_cur_state(struct thermal_cooling_device *cdev,
         return result;
 }
 
-struct thermal_cooling_device_ops processor_cooling_ops = {
+const struct thermal_cooling_device_ops processor_cooling_ops = {
         .get_max_state = processor_get_max_state,
         .get_cur_state = processor_get_cur_state,
         .set_cur_state = processor_set_cur_state,
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 50658ff887d9..6e36d0c0057c 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -130,6 +130,9 @@ struct acpi_sbs {
 
 #define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
 
+static int acpi_sbs_remove(struct acpi_device *device, int type);
+static int acpi_battery_get_state(struct acpi_battery *battery);
+
 static inline int battery_scale(int log)
 {
         int scale = 1;
@@ -195,6 +198,8 @@ static int acpi_sbs_battery_get_property(struct power_supply *psy,
 
         if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
                 return -ENODEV;
+
+        acpi_battery_get_state(battery);
         switch (psp) {
         case POWER_SUPPLY_PROP_STATUS:
                 if (battery->rate_now < 0)
@@ -225,11 +230,17 @@ static int acpi_sbs_battery_get_property(struct power_supply *psy,
         case POWER_SUPPLY_PROP_POWER_NOW:
                 val->intval = abs(battery->rate_now) *
                                 acpi_battery_ipscale(battery) * 1000;
+                val->intval *= (acpi_battery_mode(battery)) ?
+                                (battery->voltage_now *
+                                acpi_battery_vscale(battery) / 1000) : 1;
                 break;
         case POWER_SUPPLY_PROP_CURRENT_AVG:
         case POWER_SUPPLY_PROP_POWER_AVG:
                 val->intval = abs(battery->rate_avg) *
                                 acpi_battery_ipscale(battery) * 1000;
+                val->intval *= (acpi_battery_mode(battery)) ?
+                                (battery->voltage_now *
+                                acpi_battery_vscale(battery) / 1000) : 1;
                 break;
         case POWER_SUPPLY_PROP_CAPACITY:
                 val->intval = battery->state_of_charge;
@@ -903,8 +914,6 @@ static void acpi_sbs_callback(void *context)
         }
 }
 
-static int acpi_sbs_remove(struct acpi_device *device, int type);
-
 static int acpi_sbs_add(struct acpi_device *device)
 {
         struct acpi_sbs *sbs;
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 6c949602cbd1..3ed80b2ca907 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -428,6 +428,22 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
                 DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
                 },
         },
+        {
+        .callback = init_old_suspend_ordering,
+        .ident = "Asus A8N-SLI DELUXE",
+        .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+                DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
+                },
+        },
+        {
+        .callback = init_old_suspend_ordering,
+        .ident = "Asus A8N-SLI Premium",
+        .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+                DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
+                },
+        },
         {},
 };
 #endif /* CONFIG_SUSPEND */
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 77255f250dbb..c538d0ef10ff 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -149,12 +149,12 @@ static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
         return result;
 }
 
-static struct kernel_param_ops param_ops_debug_layer = {
+static const struct kernel_param_ops param_ops_debug_layer = {
         .set = param_set_uint,
         .get = param_get_debug_layer,
 };
 
-static struct kernel_param_ops param_ops_debug_level = {
+static const struct kernel_param_ops param_ops_debug_level = {
         .set = param_set_uint,
         .get = param_get_debug_level,
 };
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 2607e17b520f..48fbc647b178 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -812,7 +812,7 @@ acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
                                 thermal_zone_unbind_cooling_device);
 }
 
-static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
         .bind = acpi_thermal_bind_cooling_device,
         .unbind = acpi_thermal_unbind_cooling_device,
         .get_temp = thermal_get_temp,
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index ada4b4d9bdc8..08a44b532f7c 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -307,7 +307,7 @@ video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long st
         return acpi_video_device_lcd_set_level(video, level);
 }
 
-static struct thermal_cooling_device_ops video_cooling_ops = {
+static const struct thermal_cooling_device_ops video_cooling_ops = {
         .get_max_state = video_get_max_state,
         .get_cur_state = video_get_cur_state,
         .set_cur_state = video_set_cur_state,
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index e0a5b555cee1..bb7c5f1085cc 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -218,12 +218,12 @@ static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
         ata_acpi_uevent(dev->link->ap, dev, event);
 }
 
-static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
+static const struct acpi_dock_ops ata_acpi_dev_dock_ops = {
         .handler = ata_acpi_dev_notify_dock,
         .uevent = ata_acpi_dev_uevent,
 };
 
-static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
+static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
         .handler = ata_acpi_ap_notify_dock,
         .uevent = ata_acpi_ap_uevent,
 };
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 49502bc5360a..423fd56bf612 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -616,5 +616,16 @@ config MSM_SMD_PKT
           Enables userspace clients to read and write to some packet SMD
           ports via device interface for MSM chipset.
 
+config TILE_SROM
+        bool "Character-device access via hypervisor to the Tilera SPI ROM"
+        depends on TILE
+        default y
+        ---help---
+          This device provides character-level read-write access
+          to the SROM, typically via the "0", "1", and "2" devices
+          in /dev/srom/.  The Tilera hypervisor makes the flash
+          device appear much like a simple EEPROM, and knows
+          how to partition a single ROM for multiple purposes.
+
 endmenu
 
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 7a00672bd85d..32762ba769c2 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -63,3 +63,5 @@ obj-$(CONFIG_RAMOOPS)		+= ramoops.o
 
 obj-$(CONFIG_JS_RTC)            += js-rtc.o
 js-rtc-y = rtc.o
+
+obj-$(CONFIG_TILE_SROM)         += tile-srom.o
diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c
index fca0c51bbc90..810aff9e750f 100644
--- a/drivers/char/ramoops.c
+++ b/drivers/char/ramoops.c
@@ -147,6 +147,14 @@ static int __init ramoops_probe(struct platform_device *pdev)
         cxt->phys_addr = pdata->mem_address;
         cxt->record_size = pdata->record_size;
         cxt->dump_oops = pdata->dump_oops;
+        /*
+         * Update the module parameter variables as well so they are visible
+         * through /sys/module/ramoops/parameters/
+         */
+        mem_size = pdata->mem_size;
+        mem_address = pdata->mem_address;
+        record_size = pdata->record_size;
+        dump_oops = pdata->dump_oops;
 
         if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) {
                 pr_err("request mem region failed\n");
diff --git a/drivers/char/tile-srom.c b/drivers/char/tile-srom.c
new file mode 100644
index 000000000000..cf3ee008dca2
--- /dev/null
+++ b/drivers/char/tile-srom.c
@@ -0,0 +1,481 @@
+/*
+ * Copyright 2011 Tilera Corporation. All Rights Reserved.
+ *
+ *   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.
+ *
+ *   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, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * SPI Flash ROM driver
+ *
+ * This source code is derived from code provided in "Linux Device
+ * Drivers, Third Edition", by Jonathan Corbet, Alessandro Rubini, and
+ * Greg Kroah-Hartman, published by O'Reilly Media, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/kernel.h>       /* printk() */
+#include <linux/slab.h>         /* kmalloc() */
+#include <linux/fs.h>           /* everything... */
+#include <linux/errno.h>        /* error codes */
+#include <linux/types.h>        /* size_t */
+#include <linux/proc_fs.h>
+#include <linux/fcntl.h>        /* O_ACCMODE */
+#include <linux/aio.h>
+#include <linux/pagemap.h>
+#include <linux/hugetlb.h>
+#include <linux/uaccess.h>
+#include <linux/platform_device.h>
+#include <hv/hypervisor.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <hv/drv_srom_intf.h>
+
+/*
+ * Size of our hypervisor I/O requests.  We break up large transfers
+ * so that we don't spend large uninterrupted spans of time in the
+ * hypervisor.  Erasing an SROM sector takes a significant fraction of
+ * a second, so if we allowed the user to, say, do one I/O to write the
+ * entire ROM, we'd get soft lockup timeouts, or worse.
+ */
+#define SROM_CHUNK_SIZE ((size_t)4096)
+
+/*
+ * When hypervisor is busy (e.g. erasing), poll the status periodically.
+ */
+
+/*
+ * Interval to poll the state in msec
+ */
+#define SROM_WAIT_TRY_INTERVAL 20
+
+/*
+ * Maximum times to poll the state
+ */
+#define SROM_MAX_WAIT_TRY_TIMES 1000
+
+struct srom_dev {
+        int hv_devhdl;                  /* Handle for hypervisor device */
+        u32 total_size;                 /* Size of this device */
+        u32 sector_size;                /* Size of a sector */
+        u32 page_size;                  /* Size of a page */
+        struct mutex lock;              /* Allow only one accessor at a time */
+};
+
+static int srom_major;                  /* Dynamic major by default */
+module_param(srom_major, int, 0);
+MODULE_AUTHOR("Tilera Corporation");
+MODULE_LICENSE("GPL");
+
+static int srom_devs;                   /* Number of SROM partitions */
+static struct cdev srom_cdev;
+static struct class *srom_class;
+static struct srom_dev *srom_devices;
+
+/*
+ * Handle calling the hypervisor and managing EAGAIN/EBUSY.
+ */
+
+static ssize_t _srom_read(int hv_devhdl, void *buf,
+                          loff_t off, size_t count)
+{
+        int retval, retries = SROM_MAX_WAIT_TRY_TIMES;
+        for (;;) {
+                retval = hv_dev_pread(hv_devhdl, 0, (HV_VirtAddr)buf,
+                                      count, off);
+                if (retval >= 0)
+                        return retval;
+                if (retval == HV_EAGAIN)
+                        continue;
+                if (retval == HV_EBUSY && --retries > 0) {
+                        msleep(SROM_WAIT_TRY_INTERVAL);
+                        continue;
+                }
+                pr_err("_srom_read: error %d\n", retval);
+                return -EIO;
+        }
+}
+
+static ssize_t _srom_write(int hv_devhdl, const void *buf,
+                           loff_t off, size_t count)
+{
+        int retval, retries = SROM_MAX_WAIT_TRY_TIMES;
+        for (;;) {
+                retval = hv_dev_pwrite(hv_devhdl, 0, (HV_VirtAddr)buf,
+                                       count, off);
+                if (retval >= 0)
+                        return retval;
+                if (retval == HV_EAGAIN)
+                        continue;
+                if (retval == HV_EBUSY && --retries > 0) {
+                        msleep(SROM_WAIT_TRY_INTERVAL);
+                        continue;
+                }
+                pr_err("_srom_write: error %d\n", retval);
+                return -EIO;
+        }
+}
+
+/**
+ * srom_open() - Device open routine.
+ * @inode: Inode for this device.
+ * @filp: File for this specific open of the device.
+ *
+ * Returns zero, or an error code.
+ */
+static int srom_open(struct inode *inode, struct file *filp)
+{
+        filp->private_data = &srom_devices[iminor(inode)];
+        return 0;
+}
+
+
+/**
+ * srom_release() - Device release routine.
+ * @inode: Inode for this device.
+ * @filp: File for this specific open of the device.
+ *
+ * Returns zero, or an error code.
+ */
+static int srom_release(struct inode *inode, struct file *filp)
+{
+        struct srom_dev *srom = filp->private_data;
+        char dummy;
+
+        /* Make sure we've flushed anything written to the ROM. */
+        mutex_lock(&srom->lock);
+        if (srom->hv_devhdl >= 0)
+                _srom_write(srom->hv_devhdl, &dummy, SROM_FLUSH_OFF, 1);
+        mutex_unlock(&srom->lock);
+
+        filp->private_data = NULL;
+
+        return 0;
+}
+
+
+/**
+ * srom_read() - Read data from the device.
+ * @filp: File for this specific open of the device.
+ * @buf: User's data buffer.
+ * @count: Number of bytes requested.
+ * @f_pos: File position.
+ *
+ * Returns number of bytes read, or an error code.
+ */
+static ssize_t srom_read(struct file *filp, char __user *buf,
+                         size_t count, loff_t *f_pos)
+{
+        int retval = 0;
+        void *kernbuf;
+        struct srom_dev *srom = filp->private_data;
+
+        kernbuf = kmalloc(SROM_CHUNK_SIZE, GFP_KERNEL);
+        if (!kernbuf)
+                return -ENOMEM;
+
+        if (mutex_lock_interruptible(&srom->lock)) {
+                retval = -ERESTARTSYS;
+                kfree(kernbuf);
+                return retval;
+        }
+
+        while (count) {
+                int hv_retval;
+                int bytes_this_pass = min(count, SROM_CHUNK_SIZE);
+
+                hv_retval = _srom_read(srom->hv_devhdl, kernbuf,
+                                       *f_pos, bytes_this_pass);
+                if (hv_retval > 0) {
+                        if (copy_to_user(buf, kernbuf, hv_retval) != 0) {
+                                retval = -EFAULT;
+                                break;
+                        }
+                } else if (hv_retval <= 0) {
+                        if (retval == 0)
+                                retval = hv_retval;
+                        break;
+                }
+
+                retval += hv_retval;
+                *f_pos += hv_retval;
+                buf += hv_retval;
+                count -= hv_retval;
+        }
+
+        mutex_unlock(&srom->lock);
+        kfree(kernbuf);
+
+        return retval;
+}
+
+/**
+ * srom_write() - Write data to the device.
+ * @filp: File for this specific open of the device.
+ * @buf: User's data buffer.
+ * @count: Number of bytes requested.
+ * @f_pos: File position.
+ *
+ * Returns number of bytes written, or an error code.
+ */
+static ssize_t srom_write(struct file *filp, const char __user *buf,
+                          size_t count, loff_t *f_pos)
+{
+        int retval = 0;
+        void *kernbuf;
+        struct srom_dev *srom = filp->private_data;
+
+        kernbuf = kmalloc(SROM_CHUNK_SIZE, GFP_KERNEL);
+        if (!kernbuf)
+                return -ENOMEM;
+
+        if (mutex_lock_interruptible(&srom->lock)) {
+                retval = -ERESTARTSYS;
+                kfree(kernbuf);
+                return retval;
+        }
+
+        while (count) {
+                int hv_retval;
+                int bytes_this_pass = min(count, SROM_CHUNK_SIZE);
+
+                if (copy_from_user(kernbuf, buf, bytes_this_pass) != 0) {
+                        retval = -EFAULT;
+                        break;
+                }
+
+                hv_retval = _srom_write(srom->hv_devhdl, kernbuf,
+                                        *f_pos, bytes_this_pass);
+                if (hv_retval <= 0) {
+                        if (retval == 0)
+                                retval = hv_retval;
+                        break;
+                }
+
+                retval += hv_retval;
+                *f_pos += hv_retval;
+                buf += hv_retval;
+                count -= hv_retval;
+        }
+
+        mutex_unlock(&srom->lock);
+        kfree(kernbuf);
+
+        return retval;
+}
+
+/* Provide our own implementation so we can use srom->total_size. */
+loff_t srom_llseek(struct file *filp, loff_t offset, int origin)
+{
+        struct srom_dev *srom = filp->private_data;
+
+        if (mutex_lock_interruptible(&srom->lock))
+                return -ERESTARTSYS;
+
+        switch (origin) {
+        case SEEK_END:
+                offset += srom->total_size;
+                break;
+        case SEEK_CUR:
+                offset += filp->f_pos;
+                break;
+        }
+
+        if (offset < 0 || offset > srom->total_size) {
+                offset = -EINVAL;
+        } else {
+                filp->f_pos = offset;
+                filp->f_version = 0;
+        }
+
+        mutex_unlock(&srom->lock);
+
+        return offset;
+}
+
+static ssize_t total_show(struct device *dev,
+                          struct device_attribute *attr, char *buf)
+{
+        struct srom_dev *srom = dev_get_drvdata(dev);
+        return sprintf(buf, "%u\n", srom->total_size);
+}
+
+static ssize_t sector_show(struct device *dev,
+                           struct device_attribute *attr, char *buf)
+{
+        struct srom_dev *srom = dev_get_drvdata(dev);
+        return sprintf(buf, "%u\n", srom->sector_size);
+}
+
+static ssize_t page_show(struct device *dev,
+                         struct device_attribute *attr, char *buf)
+{
+        struct srom_dev *srom = dev_get_drvdata(dev);
+        return sprintf(buf, "%u\n", srom->page_size);
+}
+
+static struct device_attribute srom_dev_attrs[] = {
+        __ATTR(total_size, S_IRUGO, total_show, NULL),
+        __ATTR(sector_size, S_IRUGO, sector_show, NULL),
+        __ATTR(page_size, S_IRUGO, page_show, NULL),
+        __ATTR_NULL
+};
+
+static char *srom_devnode(struct device *dev, mode_t *mode)
+{
+        *mode = S_IRUGO | S_IWUSR;
+        return kasprintf(GFP_KERNEL, "srom/%s", dev_name(dev));
+}
+
+/*
+ * The fops
+ */
+static const struct file_operations srom_fops = {
+        .owner =     THIS_MODULE,
+        .llseek =    srom_llseek,
+        .read =      srom_read,
+        .write =     srom_write,
+        .open =      srom_open,
+        .release =   srom_release,
+};
+
+/**
+ * srom_setup_minor() - Initialize per-minor information.
+ * @srom: Per-device SROM state.
+ * @index: Device to set up.
+ */
+static int srom_setup_minor(struct srom_dev *srom, int index)
+{
+        struct device *dev;
+        int devhdl = srom->hv_devhdl;
+
+        mutex_init(&srom->lock);
+
+        if (_srom_read(devhdl, &srom->total_size,
+                       SROM_TOTAL_SIZE_OFF, sizeof(srom->total_size)) < 0)
+                return -EIO;
+        if (_srom_read(devhdl, &srom->sector_size,
+                       SROM_SECTOR_SIZE_OFF, sizeof(srom->sector_size)) < 0)
+                return -EIO;
+        if (_srom_read(devhdl, &srom->page_size,
+                       SROM_PAGE_SIZE_OFF, sizeof(srom->page_size)) < 0)
+                return -EIO;
+
+        dev = device_create(srom_class, &platform_bus,
+                            MKDEV(srom_major, index), srom, "%d", index);
+        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+/** srom_init() - Initialize the driver's module. */
+static int srom_init(void)
+{
+        int result, i;
+        dev_t dev = MKDEV(srom_major, 0);
+
+        /*
+         * Start with a plausible number of partitions; the krealloc() call
+         * below will yield about log(srom_devs) additional allocations.
+         */
+        srom_devices = kzalloc(4 * sizeof(struct srom_dev), GFP_KERNEL);
+
+        /* Discover the number of srom partitions. */
+        for (i = 0; ; i++) {
+                int devhdl;
+                char buf[20];
+                struct srom_dev *new_srom_devices =
+                        krealloc(srom_devices, (i+1) * sizeof(struct srom_dev),
+                                 GFP_KERNEL | __GFP_ZERO);
+                if (!new_srom_devices) {
+                        result = -ENOMEM;
+                        goto fail_mem;
+                }
+                srom_devices = new_srom_devices;
+                sprintf(buf, "srom/0/%d", i);
+                devhdl = hv_dev_open((HV_VirtAddr)buf, 0);
+                if (devhdl < 0) {
+                        if (devhdl != HV_ENODEV)
+                                pr_notice("srom/%d: hv_dev_open failed: %d.\n",
+                                          i, devhdl);
+                        break;
+                }
+                srom_devices[i].hv_devhdl = devhdl;
+        }
+        srom_devs = i;
+
+        /* Bail out early if we have no partitions at all. */
+        if (srom_devs == 0) {
+                result = -ENODEV;
+                goto fail_mem;
+        }
+
+        /* Register our major, and accept a dynamic number. */
+        if (srom_major)
+                result = register_chrdev_region(dev, srom_devs, "srom");
+        else {
+                result = alloc_chrdev_region(&dev, 0, srom_devs, "srom");
+                srom_major = MAJOR(dev);
+        }
+        if (result < 0)
+                goto fail_mem;
+
+        /* Register a character device. */
+        cdev_init(&srom_cdev, &srom_fops);
+        srom_cdev.owner = THIS_MODULE;
+        srom_cdev.ops = &srom_fops;
+        result = cdev_add(&srom_cdev, dev, srom_devs);
+        if (result < 0)
+                goto fail_chrdev;
+
+        /* Create a sysfs class. */
+        srom_class = class_create(THIS_MODULE, "srom");
+        if (IS_ERR(srom_class)) {
+                result = PTR_ERR(srom_class);
+                goto fail_cdev;
+        }
+        srom_class->dev_attrs = srom_dev_attrs;
+        srom_class->devnode = srom_devnode;
+
+        /* Do per-partition initialization */
+        for (i = 0; i < srom_devs; i++) {
+                result = srom_setup_minor(srom_devices + i, i);
+                if (result < 0)
+                        goto fail_class;
+        }
+
+        return 0;
+
+fail_class:
+        for (i = 0; i < srom_devs; i++)
+                device_destroy(srom_class, MKDEV(srom_major, i));
+        class_destroy(srom_class);
+fail_cdev:
+        cdev_del(&srom_cdev);
+fail_chrdev:
+        unregister_chrdev_region(dev, srom_devs);
+fail_mem:
+        kfree(srom_devices);
+        return result;
+}
+
+/** srom_cleanup() - Clean up the driver's module. */
+static void srom_cleanup(void)
+{
+        int i;
+        for (i = 0; i < srom_devs; i++)
+                device_destroy(srom_class, MKDEV(srom_major, i));
+        class_destroy(srom_class);
+        cdev_del(&srom_cdev);
+        unregister_chrdev_region(MKDEV(srom_major, 0), srom_devs);
+        kfree(srom_devices);
+}
+
+module_init(srom_init);
+module_exit(srom_cleanup);
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 7fc2f108f490..3f4051a7c5a7 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -80,7 +80,7 @@ enum tis_defaults {
 static LIST_HEAD(tis_chips);
 static DEFINE_SPINLOCK(tis_lock);
 
-#ifdef CONFIG_PNP
+#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
 static int is_itpm(struct pnp_dev *dev)
 {
         struct acpi_device *acpi = pnp_acpi_device(dev);
@@ -93,6 +93,11 @@ static int is_itpm(struct pnp_dev *dev)
 
         return 0;
 }
+#else
+static inline int is_itpm(struct pnp_dev *dev)
+{
+        return 0;
+}
 #endif
 
 static int check_locality(struct tpm_chip *chip, int l)
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index bf5092455a8f..d4c542372886 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -25,9 +25,19 @@ DEFINE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
 
 DEFINE_MUTEX(cpuidle_lock);
 LIST_HEAD(cpuidle_detected_devices);
-static void (*pm_idle_old)(void);
 
 static int enabled_devices;
+static int off __read_mostly;
+static int initialized __read_mostly;
+
+int cpuidle_disabled(void)
+{
+        return off;
+}
+void disable_cpuidle(void)
+{
+        off = 1;
+}
 
 #if defined(CONFIG_ARCH_HAS_CPU_IDLE_WAIT)
 static void cpuidle_kick_cpus(void)
@@ -46,25 +56,23 @@ static int __cpuidle_register_device(struct cpuidle_device *dev);
  * cpuidle_idle_call - the main idle loop
  *
  * NOTE: no locks or semaphores should be used here
+ * return non-zero on failure
  */
-static void cpuidle_idle_call(void)
+int cpuidle_idle_call(void)
 {
         struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
         struct cpuidle_state *target_state;
         int next_state;
 
+        if (off)
+                return -ENODEV;
+
+        if (!initialized)
+                return -ENODEV;
+
         /* check if the device is ready */
-        if (!dev || !dev->enabled) {
-                if (pm_idle_old)
-                        pm_idle_old();
-                else
-#if defined(CONFIG_ARCH_HAS_DEFAULT_IDLE)
-                        default_idle();
-#else
-                        local_irq_enable();
-#endif
-                return;
-        }
+        if (!dev || !dev->enabled)
+                return -EBUSY;
 
 #if 0
         /* shows regressions, re-enable for 2.6.29 */
@@ -89,7 +97,7 @@ static void cpuidle_idle_call(void)
         next_state = cpuidle_curr_governor->select(dev);
         if (need_resched()) {
                 local_irq_enable();
-                return;
+                return 0;
         }
 
         target_state = &dev->states[next_state];
@@ -114,6 +122,8 @@ static void cpuidle_idle_call(void)
         /* give the governor an opportunity to reflect on the outcome */
         if (cpuidle_curr_governor->reflect)
                 cpuidle_curr_governor->reflect(dev);
+
+        return 0;
 }
 
 /**
@@ -121,10 +131,10 @@ static void cpuidle_idle_call(void)
  */
 void cpuidle_install_idle_handler(void)
 {
-        if (enabled_devices && (pm_idle != cpuidle_idle_call)) {
+        if (enabled_devices) {
                 /* Make sure all changes finished before we switch to new idle */
                 smp_wmb();
-                pm_idle = cpuidle_idle_call;
+                initialized = 1;
         }
 }
 
@@ -133,8 +143,8 @@ void cpuidle_install_idle_handler(void)
  */
 void cpuidle_uninstall_idle_handler(void)
 {
-        if (enabled_devices && pm_idle_old && (pm_idle != pm_idle_old)) {
-                pm_idle = pm_idle_old;
+        if (enabled_devices) {
+                initialized = 0;
                 cpuidle_kick_cpus();
         }
 }
@@ -427,7 +437,8 @@ static int __init cpuidle_init(void)
 {
         int ret;
 
-        pm_idle_old = pm_idle;
+        if (cpuidle_disabled())
+                return -ENODEV;
 
         ret = cpuidle_add_class_sysfs(&cpu_sysdev_class);
         if (ret)
@@ -438,4 +449,5 @@ static int __init cpuidle_init(void)
         return 0;
 }
 
+module_param(off, int, 0444);
 core_initcall(cpuidle_init);
diff --git a/drivers/cpuidle/cpuidle.h b/drivers/cpuidle/cpuidle.h
index 33e50d556f17..38c3fd8b9d76 100644
--- a/drivers/cpuidle/cpuidle.h
+++ b/drivers/cpuidle/cpuidle.h
@@ -13,6 +13,7 @@ extern struct list_head cpuidle_governors;
 extern struct list_head cpuidle_detected_devices;
 extern struct mutex cpuidle_lock;
 extern spinlock_t cpuidle_driver_lock;
+extern int cpuidle_disabled(void);
 
 /* idle loop */
 extern void cpuidle_install_idle_handler(void);
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index fd1601e3d125..3f7e3cedd133 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -26,6 +26,9 @@ int cpuidle_register_driver(struct cpuidle_driver *drv)
         if (!drv)
                 return -EINVAL;
 
+        if (cpuidle_disabled())
+                return -ENODEV;
+
         spin_lock(&cpuidle_driver_lock);
         if (cpuidle_curr_driver) {
                 spin_unlock(&cpuidle_driver_lock);
diff --git a/drivers/cpuidle/governor.c b/drivers/cpuidle/governor.c
index 724c164d31c9..ea2f8e7aa24a 100644
--- a/drivers/cpuidle/governor.c
+++ b/drivers/cpuidle/governor.c
@@ -81,6 +81,9 @@ int cpuidle_register_governor(struct cpuidle_governor *gov)
         if (!gov || !gov->select)
                 return -EINVAL;
 
+        if (cpuidle_disabled())
+                return -ENODEV;
+
         mutex_lock(&cpuidle_lock);
         if (__cpuidle_find_governor(gov->name) == NULL) {
                 ret = 0;
diff --git a/drivers/eisa/pci_eisa.c b/drivers/eisa/pci_eisa.c
index 30da70d06a6d..cdae207028a7 100644
--- a/drivers/eisa/pci_eisa.c
+++ b/drivers/eisa/pci_eisa.c
@@ -45,13 +45,13 @@ static int __init pci_eisa_init(struct pci_dev *pdev,
         return 0;
 }
 
-static struct pci_device_id __initdata pci_eisa_pci_tbl[] = {
+static struct pci_device_id pci_eisa_pci_tbl[] = {
         { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
           PCI_CLASS_BRIDGE_EISA << 8, 0xffff00, 0 },
         { 0, }
 };
 
-static struct pci_driver __initdata pci_eisa_driver = {
+static struct pci_driver __refdata pci_eisa_driver = {
         .name           = "pci_eisa",
         .id_table       = pci_eisa_pci_tbl,
         .probe          = pci_eisa_init,
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index eacb05e6cfb3..eb80b549ed8d 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -157,7 +157,7 @@ utf16_strnlen(efi_char16_t *s, size_t maxlength)
         return length;
 }
 
-static unsigned long
+static inline unsigned long
 utf16_strlen(efi_char16_t *s)
 {
         return utf16_strnlen(s, ~0UL);
@@ -580,8 +580,8 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
         return -1;
 }
 
-static u64 efi_pstore_write(enum pstore_type_id type, int part, size_t size,
-                            struct pstore_info *psi)
+static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
+                            size_t size, struct pstore_info *psi)
 {
         return 0;
 }
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index ce281d152275..67df91af8424 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -483,7 +483,7 @@ static int gpio_keys_get_devtree_pdata(struct device *dev,
 
         buttons = kzalloc(pdata->nbuttons * (sizeof *buttons), GFP_KERNEL);
         if (!buttons)
-                return -ENODEV;
+                return -ENOMEM;
 
         pp = NULL;
         i = 0;
diff --git a/drivers/input/keyboard/lm8323.c b/drivers/input/keyboard/lm8323.c
index ab0acaf7fe8f..756348a7f93a 100644
--- a/drivers/input/keyboard/lm8323.c
+++ b/drivers/input/keyboard/lm8323.c
@@ -754,8 +754,11 @@ fail3:
         device_remove_file(&client->dev, &dev_attr_disable_kp);
 fail2:
         while (--pwm >= 0)
-                if (lm->pwm[pwm].enabled)
+                if (lm->pwm[pwm].enabled) {
+                        device_remove_file(lm->pwm[pwm].cdev.dev,
+                                           &dev_attr_time);
                         led_classdev_unregister(&lm->pwm[pwm].cdev);
+                }
 fail1:
         input_free_device(idev);
         kfree(lm);
@@ -775,8 +778,10 @@ static int __devexit lm8323_remove(struct i2c_client *client)
         device_remove_file(&lm->client->dev, &dev_attr_disable_kp);
 
         for (i = 0; i < 3; i++)
-                if (lm->pwm[i].enabled)
+                if (lm->pwm[i].enabled) {
+                        device_remove_file(lm->pwm[i].cdev.dev, &dev_attr_time);
                         led_classdev_unregister(&lm->pwm[i].cdev);
+                }
 
         kfree(lm);
 
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index da3828fc2c09..f270447ba951 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -19,6 +19,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/input.h>
 #include <linux/platform_device.h>
@@ -37,7 +38,7 @@
 #define KBC_ROW_SCAN_DLY        5
 
 /* KBC uses a 32KHz clock so a cycle = 1/32Khz */
-#define KBC_CYCLE_USEC  32
+#define KBC_CYCLE_MS    32
 
 /* KBC Registers */
 
@@ -647,7 +648,7 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev)
         debounce_cnt = min(pdata->debounce_cnt, KBC_MAX_DEBOUNCE_CNT);
         scan_time_rows = (KBC_ROW_SCAN_TIME + debounce_cnt) * num_rows;
         kbc->repoll_dly = KBC_ROW_SCAN_DLY + scan_time_rows + pdata->repeat_cnt;
-        kbc->repoll_dly = ((kbc->repoll_dly * KBC_CYCLE_USEC) + 999) / 1000;
+        kbc->repoll_dly = DIV_ROUND_UP(kbc->repoll_dly, KBC_CYCLE_MS);
 
         input_dev->name = pdev->name;
         input_dev->id.bustype = BUS_HOST;
diff --git a/drivers/input/misc/kxtj9.c b/drivers/input/misc/kxtj9.c
index c456f63b6bae..783597a9a64a 100644
--- a/drivers/input/misc/kxtj9.c
+++ b/drivers/input/misc/kxtj9.c
@@ -21,6 +21,7 @@
 #include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
+#include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/input/kxtj9.h>
 #include <linux/input-polldev.h>
diff --git a/drivers/input/misc/mma8450.c b/drivers/input/misc/mma8450.c
index 20f8f9284f02..6c76cf792991 100644
--- a/drivers/input/misc/mma8450.c
+++ b/drivers/input/misc/mma8450.c
@@ -24,6 +24,7 @@
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/input-polldev.h>
+#include <linux/of_device.h>
 
 #define MMA8450_DRV_NAME        "mma8450"
 
@@ -229,10 +230,17 @@ static const struct i2c_device_id mma8450_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, mma8450_id);
 
+static const struct of_device_id mma8450_dt_ids[] = {
+        { .compatible = "fsl,mma8450", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, mma8450_dt_ids);
+
 static struct i2c_driver mma8450_driver = {
         .driver = {
                 .name   = MMA8450_DRV_NAME,
                 .owner  = THIS_MODULE,
+                .of_match_table = mma8450_dt_ids,
         },
         .probe          = mma8450_probe,
         .remove         = __devexit_p(mma8450_remove),
diff --git a/drivers/input/mouse/hgpk.c b/drivers/input/mouse/hgpk.c
index 95577c15ae56..4d17d9f3320b 100644
--- a/drivers/input/mouse/hgpk.c
+++ b/drivers/input/mouse/hgpk.c
@@ -32,6 +32,7 @@
 #define DEBUG
 #include <linux/slab.h>
 #include <linux/input.h>
+#include <linux/module.h>
 #include <linux/serio.h>
 #include <linux/libps2.h>
 #include <linux/delay.h>
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c
index bc3b5187f3a3..131f9d1c921b 100644
--- a/drivers/input/touchscreen/ad7879.c
+++ b/drivers/input/touchscreen/ad7879.c
@@ -249,12 +249,14 @@ static void __ad7879_enable(struct ad7879 *ts)
 
 static void __ad7879_disable(struct ad7879 *ts)
 {
+        u16 reg = (ts->cmd_crtl2 & ~AD7879_PM(-1)) |
+                AD7879_PM(AD7879_PM_SHUTDOWN);
         disable_irq(ts->irq);
 
         if (del_timer_sync(&ts->timer))
                 ad7879_ts_event_release(ts);
 
-        ad7879_write(ts, AD7879_REG_CTRL2, AD7879_PM(AD7879_PM_SHUTDOWN));
+        ad7879_write(ts, AD7879_REG_CTRL2, reg);
 }
 
 
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 3ff22e32b602..fb28b5af733b 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -17,14 +17,39 @@
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  */
+#include <linux/ctype.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 
+/**
+ * struct alias_prop - Alias property in 'aliases' node
+ * @link:       List node to link the structure in aliases_lookup list
+ * @alias:      Alias property name
+ * @np:         Pointer to device_node that the alias stands for
+ * @id:         Index value from end of alias name
+ * @stem:       Alias string without the index
+ *
+ * The structure represents one alias property of 'aliases' node as
+ * an entry in aliases_lookup list.
+ */
+struct alias_prop {
+        struct list_head link;
+        const char *alias;
+        struct device_node *np;
+        int id;
+        char stem[0];
+};
+
+static LIST_HEAD(aliases_lookup);
+
 struct device_node *allnodes;
 struct device_node *of_chosen;
+struct device_node *of_aliases;
+
+static DEFINE_MUTEX(of_aliases_mutex);
 
 /* use when traversing tree through the allnext, child, sibling,
  * or parent members of struct device_node.
@@ -988,3 +1013,108 @@ out_unlock:
 }
 #endif /* defined(CONFIG_OF_DYNAMIC) */
 
+static void of_alias_add(struct alias_prop *ap, struct device_node *np,
+                         int id, const char *stem, int stem_len)
+{
+        ap->id = id;
+        ap->np = np;
+        strncpy(ap->stem, stem, stem_len);
+        ap->stem[stem_len] = 0;
+        list_add_tail(&ap->link, &aliases_lookup);
+        pr_debug("adding DT alias:%s: stem=%s id=%i node=%s\n",
+                 ap->alias, ap->stem, ap->id, np ? np->full_name : NULL);
+}
+
+/**
+ * of_alias_scan() - Scan all properties of 'aliases' node
+ *
+ * The function scans all the properties of 'aliases' node and populate
+ * the global lookup table with the properties.  It returns the
+ * number of alias_prop found, or error code in error case.
+ */
+__init void of_alias_scan(void)
+{
+        struct property *pp;
+
+        if (!of_aliases)
+                return;
+
+        for_each_property(pp, of_aliases->properties) {
+                const char *start = pp->name;
+                const char *end = start + strlen(start);
+                struct device_node *np;
+                struct alias_prop *ap;
+                int id, len;
+
+                /* Skip those we do not want to proceed */
+                if (!strcmp(pp->name, "name") ||
+                    !strcmp(pp->name, "phandle") ||
+                    !strcmp(pp->name, "linux,phandle"))
+                        continue;
+
+                np = of_find_node_by_path(pp->value);
+                if (!np)
+                        continue;
+
+                /* walk alias backwards to extract the id and 'stem' string */
+                while (isdigit(*(end-1)) && end > start)
+                        end--;
+                len = end - start;
+                id = strlen(end) ? simple_strtoul(end, NULL, 10) : -1;
+
+                /* Allocate an alias_prop with enough space for the stem */
+                ap = early_init_dt_alloc_memory_arch(sizeof(*ap) + len + 1, 4);
+                if (!ap)
+                        continue;
+                ap->alias = start;
+                of_alias_add(ap, np, id, start, len);
+        }
+}
+
+/**
+ * of_alias_get_id() - Get alias id for the given device_node
+ * @np:         Pointer to the given device_node
+ * @stem:       Alias stem of the given device_node
+ *
+ * The function travels the lookup table to get alias id for the given
+ * device_node and alias stem.  It returns the alias id if find it.
+ * If not, dynamically creates one in the lookup table and returns it,
+ * or returns error code if fail to create.
+ */
+int of_alias_get_id(struct device_node *np, const char *stem)
+{
+        struct alias_prop *app;
+        int id = 0;
+        bool found = false;
+
+        mutex_lock(&of_aliases_mutex);
+        list_for_each_entry(app, &aliases_lookup, link) {
+                if (strcmp(app->stem, stem) != 0)
+                        continue;
+
+                if (np == app->np) {
+                        found = true;
+                        id = app->id;
+                        break;
+                }
+
+                if (id <= app->id)
+                        id = app->id + 1;
+        }
+
+        /* If an id is not found, then allocate a new one */
+        if (!found) {
+                app = kzalloc(sizeof(*app) + strlen(stem) + 1, 4);
+                if (!app) {
+                        id = -ENODEV;
+                        goto out;
+                }
+                of_alias_add(app, np, id, stem, strlen(stem));
+        }
+
+ out:
+        mutex_unlock(&of_aliases_mutex);
+
+        return id;
+}
+EXPORT_SYMBOL_GPL(of_alias_get_id);
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 65200af29c52..13d6d3a96b31 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -707,10 +707,12 @@ void __init unflatten_device_tree(void)
         __unflatten_device_tree(initial_boot_params, &allnodes,
                                 early_init_dt_alloc_memory_arch);
 
-        /* Get pointer to OF "/chosen" node for use everywhere */
+        /* Get pointer to "/chosen" and "/aliasas" nodes for use everywhere */
         of_chosen = of_find_node_by_path("/chosen");
         if (of_chosen == NULL)
                 of_chosen = of_find_node_by_path("/chosen@0");
+        of_aliases = of_find_node_by_path("/aliases");
+        of_alias_scan();
 }
 
 #endif /* CONFIG_OF_EARLY_FLATTREE */
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index a70fa89f76fd..220285760b68 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -110,7 +110,7 @@ static int post_dock_fixups(struct notifier_block *nb, unsigned long val,
 }
 
 
-static struct acpi_dock_ops acpiphp_dock_ops = {
+static const struct acpi_dock_ops acpiphp_dock_ops = {
         .handler = handle_hotplug_event_func,
 };
 
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index bcae8dd41496..7789002bdd5c 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -368,7 +368,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                 pr_info("%s: already running\n", pdev->name);
 
         /* force to 24 hour mode */
-        new_ctrl = reg & ~(OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
+        new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
         new_ctrl |= OMAP_RTC_CTRL_STOP;
 
         /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
diff --git a/drivers/target/iscsi/Kconfig b/drivers/target/iscsi/Kconfig
index 564ff4e0dbc4..8345fb457a40 100644
--- a/drivers/target/iscsi/Kconfig
+++ b/drivers/target/iscsi/Kconfig
@@ -1,5 +1,6 @@
 config ISCSI_TARGET
         tristate "Linux-iSCSI.org iSCSI Target Mode Stack"
+        depends on NET
         select CRYPTO
         select CRYPTO_CRC32C
         select CRYPTO_CRC32C_INTEL if X86
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 14c81c4265bd..c24fb10de60b 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -120,7 +120,7 @@ struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf)
         struct iscsi_tiqn *tiqn = NULL;
         int ret;
 
-        if (strlen(buf) > ISCSI_IQN_LEN) {
+        if (strlen(buf) >= ISCSI_IQN_LEN) {
                 pr_err("Target IQN exceeds %d bytes\n",
                                 ISCSI_IQN_LEN);
                 return ERR_PTR(-EINVAL);
@@ -1857,7 +1857,7 @@ static int iscsit_handle_text_cmd(
         char *text_ptr, *text_in;
         int cmdsn_ret, niov = 0, rx_got, rx_size;
         u32 checksum = 0, data_crc = 0, payload_length;
-        u32 padding = 0, text_length = 0;
+        u32 padding = 0, pad_bytes = 0, text_length = 0;
         struct iscsi_cmd *cmd;
         struct kvec iov[3];
         struct iscsi_text *hdr;
@@ -1896,7 +1896,7 @@ static int iscsit_handle_text_cmd(
 
                 padding = ((-payload_length) & 3);
                 if (padding != 0) {
-                        iov[niov].iov_base = cmd->pad_bytes;
+                        iov[niov].iov_base = &pad_bytes;
                         iov[niov++].iov_len  = padding;
                         rx_size += padding;
                         pr_debug("Receiving %u additional bytes"
@@ -1917,7 +1917,7 @@ static int iscsit_handle_text_cmd(
                 if (conn->conn_ops->DataDigest) {
                         iscsit_do_crypto_hash_buf(&conn->conn_rx_hash,
                                         text_in, text_length,
-                                        padding, cmd->pad_bytes,
+                                        padding, (u8 *)&pad_bytes,
                                         (u8 *)&data_crc);
 
                         if (checksum != data_crc) {
@@ -3468,7 +3468,12 @@ static inline void iscsit_thread_check_cpumask(
 }
 
 #else
-#define iscsit_thread_get_cpumask(X) ({})
+
+void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
+{
+        return;
+}
+
 #define iscsit_thread_check_cpumask(X, Y, Z) ({})
 #endif /* CONFIG_SMP */
 
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 32bb92c44450..f095e65b1ccf 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -181,7 +181,7 @@ struct se_tpg_np *lio_target_call_addnptotpg(
                 return ERR_PTR(-EOVERFLOW);
         }
         memset(buf, 0, MAX_PORTAL_LEN + 1);
-        snprintf(buf, MAX_PORTAL_LEN, "%s", name);
+        snprintf(buf, MAX_PORTAL_LEN + 1, "%s", name);
 
         memset(&sockaddr, 0, sizeof(struct __kernel_sockaddr_storage));
 
diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index 713a4d23557a..4d087ac11067 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -978,7 +978,7 @@ struct iscsi_login *iscsi_target_init_negotiation(
                 pr_err("Unable to allocate memory for struct iscsi_login.\n");
                 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
                                 ISCSI_LOGIN_STATUS_NO_RESOURCES);
-                goto out;
+                return NULL;
         }
 
         login->req = kzalloc(ISCSI_HDR_LEN, GFP_KERNEL);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index c75a01a1c475..89760329d5d0 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1747,6 +1747,8 @@ int transport_generic_handle_cdb(
 }
 EXPORT_SYMBOL(transport_generic_handle_cdb);
 
+static void transport_generic_request_failure(struct se_cmd *,
+                        struct se_device *, int, int);
 /*
  * Used by fabric module frontends to queue tasks directly.
  * Many only be used from process context only
@@ -1754,6 +1756,8 @@ EXPORT_SYMBOL(transport_generic_handle_cdb);
 int transport_handle_cdb_direct(
         struct se_cmd *cmd)
 {
+        int ret;
+
         if (!cmd->se_lun) {
                 dump_stack();
                 pr_err("cmd->se_lun is NULL\n");
@@ -1765,8 +1769,31 @@ int transport_handle_cdb_direct(
                                 " from interrupt context\n");
                 return -EINVAL;
         }
-
-        return transport_generic_new_cmd(cmd);
+        /*
+         * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following
+         * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue()
+         * in existing usage to ensure that outstanding descriptors are handled
+         * correctly during shutdown via transport_generic_wait_for_tasks()
+         *
+         * Also, we don't take cmd->t_state_lock here as we only expect
+         * this to be called for initial descriptor submission.
+         */
+        cmd->t_state = TRANSPORT_NEW_CMD;
+        atomic_set(&cmd->t_transport_active, 1);
+        /*
+         * transport_generic_new_cmd() is already handling QUEUE_FULL,
+         * so follow TRANSPORT_NEW_CMD processing thread context usage
+         * and call transport_generic_request_failure() if necessary..
+         */
+        ret = transport_generic_new_cmd(cmd);
+        if (ret == -EAGAIN)
+                return 0;
+        else if (ret < 0) {
+                cmd->transport_error_status = ret;
+                transport_generic_request_failure(cmd, NULL, 0,
+                                (cmd->data_direction != DMA_TO_DEVICE));
+        }
+        return 0;
 }
 EXPORT_SYMBOL(transport_handle_cdb_direct);
 
@@ -3324,7 +3351,7 @@ static int transport_generic_cmd_sequencer(
                         goto out_invalid_cdb_field;
                 }
 
-                cmd->t_task_lba = get_unaligned_be16(&cdb[2]);
+                cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
                 passthrough = (dev->transport->transport_type ==
                                 TRANSPORT_PLUGIN_PHBA_PDEV);
                 /*
diff --git a/drivers/target/tcm_fc/tcm_fc.h b/drivers/target/tcm_fc/tcm_fc.h
index f7fff7ed63c3..bd4fe21a23b8 100644
--- a/drivers/target/tcm_fc/tcm_fc.h
+++ b/drivers/target/tcm_fc/tcm_fc.h
@@ -187,4 +187,9 @@ void ft_dump_cmd(struct ft_cmd *, const char *caller);
 
 ssize_t ft_format_wwn(char *, size_t, u64);
 
+/*
+ * Underlying HW specific helper function
+ */
+void ft_invl_hw_context(struct ft_cmd *);
+
 #endif /* __TCM_FC_H__ */
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c
index 09df38b4610c..5654dc22f7ae 100644
--- a/drivers/target/tcm_fc/tfc_cmd.c
+++ b/drivers/target/tcm_fc/tfc_cmd.c
@@ -320,6 +320,7 @@ static void ft_recv_seq(struct fc_seq *sp, struct fc_frame *fp, void *arg)
         default:
                 pr_debug("%s: unhandled frame r_ctl %x\n",
                        __func__, fh->fh_r_ctl);
+                ft_invl_hw_context(cmd);
                 fc_frame_free(fp);
                 transport_generic_free_cmd(&cmd->se_cmd, 0, 0);
                 break;
diff --git a/drivers/target/tcm_fc/tfc_io.c b/drivers/target/tcm_fc/tfc_io.c
index 8e2a46ddcccb..c37f4cd96452 100644
--- a/drivers/target/tcm_fc/tfc_io.c
+++ b/drivers/target/tcm_fc/tfc_io.c
@@ -213,62 +213,49 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
         if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
                 goto drop;
 
+        f_ctl = ntoh24(fh->fh_f_ctl);
+        ep = fc_seq_exch(seq);
+        lport = ep->lp;
+        if (cmd->was_ddp_setup) {
+                BUG_ON(!ep);
+                BUG_ON(!lport);
+        }
+
         /*
-         * Doesn't expect even single byte of payload. Payload
+         * Doesn't expect payload if DDP is setup. Payload
          * is expected to be copied directly to user buffers
-         * due to DDP (Large Rx offload) feature, hence
-         * BUG_ON if BUF is non-NULL
+         * due to DDP (Large Rx offload),
          */
         buf = fc_frame_payload_get(fp, 1);
-        if (cmd->was_ddp_setup && buf) {
-                pr_debug("%s: When DDP was setup, not expected to"
-                                 "receive frame with payload, Payload shall be"
-                                 "copied directly to buffer instead of coming "
-                                 "via. legacy receive queues\n", __func__);
-                BUG_ON(buf);
-        }
+        if (buf)
+                pr_err("%s: xid 0x%x, f_ctl 0x%x, cmd->sg %p, "
+                                "cmd->sg_cnt 0x%x. DDP was setup"
+                                " hence not expected to receive frame with "
+                                "payload, Frame will be dropped if "
+                                "'Sequence Initiative' bit in f_ctl is "
+                                "not set\n", __func__, ep->xid, f_ctl,
+                                cmd->sg, cmd->sg_cnt);
+        /*
+         * Invalidate HW DDP context if it was setup for respective
+         * command. Invalidation of HW DDP context is requited in both
+         * situation (success and error). 
+         */
+        ft_invl_hw_context(cmd);
 
         /*
-         * If ft_cmd indicated 'ddp_setup', in that case only the last frame
-         * should come with 'TSI bit being set'. If 'TSI bit is not set and if
-         * data frame appears here, means error condition. In both the cases
-         * release the DDP context (ddp_put) and in error case, as well
-         * initiate error recovery mechanism.
+         * If "Sequence Initiative (TSI)" bit set in f_ctl, means last
+         * write data frame is received successfully where payload is
+         * posted directly to user buffer and only the last frame's
+         * header is posted in receive queue.
+         *
+         * If "Sequence Initiative (TSI)" bit is not set, means error
+         * condition w.r.t. DDP, hence drop the packet and let explict
+         * ABORTS from other end of exchange timer trigger the recovery.
          */
-        ep = fc_seq_exch(seq);
-        if (cmd->was_ddp_setup) {
-                BUG_ON(!ep);
-                lport = ep->lp;
-                BUG_ON(!lport);
-        }
-        if (cmd->was_ddp_setup && ep->xid != FC_XID_UNKNOWN) {
-                f_ctl = ntoh24(fh->fh_f_ctl);
-                /*
-                 * If TSI bit set in f_ctl, means last write data frame is
-                 * received successfully where payload is posted directly
-                 * to user buffer and only the last frame's header is posted
-                 * in legacy receive queue
-                 */
-                if (f_ctl & FC_FC_SEQ_INIT) { /* TSI bit set in FC frame */
-                        cmd->write_data_len = lport->tt.ddp_done(lport,
-                                                                ep->xid);
-                        goto last_frame;
-                } else {
-                        /*
-                         * Updating the write_data_len may be meaningless at
-                         * this point, but just in case if required in future
-                         * for debugging or any other purpose
-                         */
-                        pr_err("%s: Received frame with TSI bit not"
-                                        " being SET, dropping the frame, "
-                                        "cmd->sg <%p>, cmd->sg_cnt <0x%x>\n",
-                                        __func__, cmd->sg, cmd->sg_cnt);
-                        cmd->write_data_len = lport->tt.ddp_done(lport,
-                                                              ep->xid);
-                        lport->tt.seq_exch_abort(cmd->seq, 0);
-                        goto drop;
-                }
-        }
+        if (f_ctl & FC_FC_SEQ_INIT)
+                goto last_frame;
+        else
+                goto drop;
 
         rel_off = ntohl(fh->fh_parm_offset);
         frame_len = fr_len(fp);
@@ -331,3 +318,39 @@ last_frame:
 drop:
         fc_frame_free(fp);
 }
+
+/*
+ * Handle and cleanup any HW specific resources if
+ * received ABORTS, errors, timeouts.
+ */
+void ft_invl_hw_context(struct ft_cmd *cmd)
+{
+        struct fc_seq *seq = cmd->seq;
+        struct fc_exch *ep = NULL;
+        struct fc_lport *lport = NULL;
+
+        BUG_ON(!cmd);
+
+        /* Cleanup the DDP context in HW if DDP was setup */
+        if (cmd->was_ddp_setup && seq) {
+                ep = fc_seq_exch(seq);
+                if (ep) {
+                        lport = ep->lp;
+                        if (lport && (ep->xid <= lport->lro_xid))
+                                /*
+                                 * "ddp_done" trigger invalidation of HW
+                                 * specific DDP context
+                                 */
+                                cmd->write_data_len = lport->tt.ddp_done(lport,
+                                                                      ep->xid);
+
+                                /*
+                                 * Resetting same variable to indicate HW's
+                                 * DDP context has been invalidated to avoid
+                                 * re_invalidation of same context (context is
+                                 * identified using ep->xid)
+                                 */
+                                cmd->was_ddp_setup = 0;
+                }
+        }
+}
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index bf7c687519ef..f7f71b2d3101 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -14,11 +14,7 @@ menuconfig THERMAL
           If you want this support, you should say Y or M here.
 
 config THERMAL_HWMON
-        bool "Hardware monitoring support"
+        bool
         depends on THERMAL
         depends on HWMON=y || HWMON=THERMAL
-        help
-          The generic thermal sysfs driver's hardware monitoring support
-          requires a 2.10.7/3.0.2 or later lm-sensors userspace.
-
-          Say Y if your user-space is new enough.
+        default y
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 0b1c82ad6805..708f8e92771a 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -420,6 +420,29 @@ thermal_cooling_device_trip_point_show(struct device *dev,
 
 /* hwmon sys I/F */
 #include <linux/hwmon.h>
+
+/* thermal zone devices with the same type share one hwmon device */
+struct thermal_hwmon_device {
+        char type[THERMAL_NAME_LENGTH];
+        struct device *device;
+        int count;
+        struct list_head tz_list;
+        struct list_head node;
+};
+
+struct thermal_hwmon_attr {
+        struct device_attribute attr;
+        char name[16];
+};
+
+/* one temperature input for each thermal zone */
+struct thermal_hwmon_temp {
+        struct list_head hwmon_node;
+        struct thermal_zone_device *tz;
+        struct thermal_hwmon_attr temp_input;   /* hwmon sys attr */
+        struct thermal_hwmon_attr temp_crit;    /* hwmon sys attr */
+};
+
 static LIST_HEAD(thermal_hwmon_list);
 
 static ssize_t
@@ -437,9 +460,10 @@ temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
         int ret;
         struct thermal_hwmon_attr *hwmon_attr
                         = container_of(attr, struct thermal_hwmon_attr, attr);
-        struct thermal_zone_device *tz
-                        = container_of(hwmon_attr, struct thermal_zone_device,
+        struct thermal_hwmon_temp *temp
+                        = container_of(hwmon_attr, struct thermal_hwmon_temp,
                                        temp_input);
+        struct thermal_zone_device *tz = temp->tz;
 
         ret = tz->ops->get_temp(tz, &temperature);
 
@@ -455,9 +479,10 @@ temp_crit_show(struct device *dev, struct device_attribute *attr,
 {
         struct thermal_hwmon_attr *hwmon_attr
                         = container_of(attr, struct thermal_hwmon_attr, attr);
-        struct thermal_zone_device *tz
-                        = container_of(hwmon_attr, struct thermal_zone_device,
+        struct thermal_hwmon_temp *temp
+                        = container_of(hwmon_attr, struct thermal_hwmon_temp,
                                        temp_crit);
+        struct thermal_zone_device *tz = temp->tz;
         long temperature;
         int ret;
 
@@ -469,22 +494,54 @@ temp_crit_show(struct device *dev, struct device_attribute *attr,
 }
 
 
-static int
-thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
+static struct thermal_hwmon_device *
+thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz)
 {
         struct thermal_hwmon_device *hwmon;
-        int new_hwmon_device = 1;
-        int result;
 
         mutex_lock(&thermal_list_lock);
         list_for_each_entry(hwmon, &thermal_hwmon_list, node)
                 if (!strcmp(hwmon->type, tz->type)) {
-                        new_hwmon_device = 0;
                         mutex_unlock(&thermal_list_lock);
-                        goto register_sys_interface;
+                        return hwmon;
+                }
+        mutex_unlock(&thermal_list_lock);
+
+        return NULL;
+}
+
+/* Find the temperature input matching a given thermal zone */
+static struct thermal_hwmon_temp *
+thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
+                          const struct thermal_zone_device *tz)
+{
+        struct thermal_hwmon_temp *temp;
+
+        mutex_lock(&thermal_list_lock);
+        list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
+                if (temp->tz == tz) {
+                        mutex_unlock(&thermal_list_lock);
+                        return temp;
                 }
         mutex_unlock(&thermal_list_lock);
 
+        return NULL;
+}
+
+static int
+thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
+{
+        struct thermal_hwmon_device *hwmon;
+        struct thermal_hwmon_temp *temp;
+        int new_hwmon_device = 1;
+        int result;
+
+        hwmon = thermal_hwmon_lookup_by_type(tz);
+        if (hwmon) {
+                new_hwmon_device = 0;
+                goto register_sys_interface;
+        }
+
         hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL);
         if (!hwmon)
                 return -ENOMEM;
@@ -502,30 +559,36 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
                 goto free_mem;
 
  register_sys_interface:
-        tz->hwmon = hwmon;
+        temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
+        if (!temp) {
+                result = -ENOMEM;
+                goto unregister_name;
+        }
+
+        temp->tz = tz;
         hwmon->count++;
 
-        snprintf(tz->temp_input.name, THERMAL_NAME_LENGTH,
+        snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH,
                  "temp%d_input", hwmon->count);
-        tz->temp_input.attr.attr.name = tz->temp_input.name;
-        tz->temp_input.attr.attr.mode = 0444;
-        tz->temp_input.attr.show = temp_input_show;
-        sysfs_attr_init(&tz->temp_input.attr.attr);
-        result = device_create_file(hwmon->device, &tz->temp_input.attr);
+        temp->temp_input.attr.attr.name = temp->temp_input.name;
+        temp->temp_input.attr.attr.mode = 0444;
+        temp->temp_input.attr.show = temp_input_show;
+        sysfs_attr_init(&temp->temp_input.attr.attr);
+        result = device_create_file(hwmon->device, &temp->temp_input.attr);
         if (result)
-                goto unregister_name;
+                goto free_temp_mem;
 
         if (tz->ops->get_crit_temp) {
                 unsigned long temperature;
                 if (!tz->ops->get_crit_temp(tz, &temperature)) {
-                        snprintf(tz->temp_crit.name, THERMAL_NAME_LENGTH,
+                        snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH,
                                 "temp%d_crit", hwmon->count);
-                        tz->temp_crit.attr.attr.name = tz->temp_crit.name;
-                        tz->temp_crit.attr.attr.mode = 0444;
-                        tz->temp_crit.attr.show = temp_crit_show;
-                        sysfs_attr_init(&tz->temp_crit.attr.attr);
+                        temp->temp_crit.attr.attr.name = temp->temp_crit.name;
+                        temp->temp_crit.attr.attr.mode = 0444;
+                        temp->temp_crit.attr.show = temp_crit_show;
+                        sysfs_attr_init(&temp->temp_crit.attr.attr);
                         result = device_create_file(hwmon->device,
-                                                    &tz->temp_crit.attr);
+                                                    &temp->temp_crit.attr);
                         if (result)
                                 goto unregister_input;
                 }
@@ -534,13 +597,15 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
         mutex_lock(&thermal_list_lock);
         if (new_hwmon_device)
                 list_add_tail(&hwmon->node, &thermal_hwmon_list);
-        list_add_tail(&tz->hwmon_node, &hwmon->tz_list);
+        list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
         mutex_unlock(&thermal_list_lock);
 
         return 0;
 
  unregister_input:
-        device_remove_file(hwmon->device, &tz->temp_input.attr);
+        device_remove_file(hwmon->device, &temp->temp_input.attr);
+ free_temp_mem:
+        kfree(temp);
  unregister_name:
         if (new_hwmon_device) {
                 device_remove_file(hwmon->device, &dev_attr_name);
@@ -556,15 +621,30 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
 static void
 thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
 {
-        struct thermal_hwmon_device *hwmon = tz->hwmon;
+        struct thermal_hwmon_device *hwmon;
+        struct thermal_hwmon_temp *temp;
+
+        hwmon = thermal_hwmon_lookup_by_type(tz);
+        if (unlikely(!hwmon)) {
+                /* Should never happen... */
+                dev_dbg(&tz->device, "hwmon device lookup failed!\n");
+                return;
+        }
+
+        temp = thermal_hwmon_lookup_temp(hwmon, tz);
+        if (unlikely(!temp)) {
+                /* Should never happen... */
+                dev_dbg(&tz->device, "temperature input lookup failed!\n");
+                return;
+        }
 
-        tz->hwmon = NULL;
-        device_remove_file(hwmon->device, &tz->temp_input.attr);
+        device_remove_file(hwmon->device, &temp->temp_input.attr);
         if (tz->ops->get_crit_temp)
-                device_remove_file(hwmon->device, &tz->temp_crit.attr);
+                device_remove_file(hwmon->device, &temp->temp_crit.attr);
 
         mutex_lock(&thermal_list_lock);
-        list_del(&tz->hwmon_node);
+        list_del(&temp->hwmon_node);
+        kfree(temp);
         if (!list_empty(&hwmon->tz_list)) {
                 mutex_unlock(&thermal_list_lock);
                 return;
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 69407e72aac1..278aeaa92505 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -336,7 +336,7 @@ config BACKLIGHT_PCF50633
           enable its driver.
 
 config BACKLIGHT_AAT2870
-        bool "AnalogicTech AAT2870 Backlight"
+        tristate "AnalogicTech AAT2870 Backlight"
         depends on BACKLIGHT_CLASS_DEVICE && MFD_AAT2870_CORE
         help
           If you have a AnalogicTech AAT2870 say Y to enable the
diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index 4952a617563d..331f1ef1dad5 100644
--- a/drivers/video/backlight/aat2870_bl.c
+++ b/drivers/video/backlight/aat2870_bl.c
@@ -44,7 +44,7 @@ static inline int aat2870_brightness(struct aat2870_bl_driver_data *aat2870_bl,
         struct backlight_device *bd = aat2870_bl->bd;
         int val;
 
-        val = brightness * aat2870_bl->max_current;
+        val = brightness * (aat2870_bl->max_current - 1);
         val /= bd->props.max_brightness;
 
         return val;
@@ -158,10 +158,10 @@ static int aat2870_bl_probe(struct platform_device *pdev)
         props.type = BACKLIGHT_RAW;
         bd = backlight_device_register("aat2870-backlight", &pdev->dev,
                                        aat2870_bl, &aat2870_bl_ops, &props);
-        if (!bd) {
+        if (IS_ERR(bd)) {
                 dev_err(&pdev->dev,
                         "Failed allocate memory for backlight device\n");
-                ret = -ENOMEM;
+                ret = PTR_ERR(bd);
                 goto out_kfree;
         }
 
@@ -175,7 +175,7 @@ static int aat2870_bl_probe(struct platform_device *pdev)
         else
                 aat2870_bl->channels = AAT2870_BL_CH_ALL;
 
-        if (pdata->max_brightness > 0)
+        if (pdata->max_current > 0)
                 aat2870_bl->max_current = pdata->max_current;
         else
                 aat2870_bl->max_current = AAT2870_CURRENT_27_9;
diff --git a/fs/Kconfig b/fs/Kconfig
index 19891aab9c6e..9fe0b349f4cd 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -127,14 +127,21 @@ config TMPFS_POSIX_ACL
         select TMPFS_XATTR
         select GENERIC_ACL
         help
-          POSIX Access Control Lists (ACLs) support permissions for users and
-          groups beyond the owner/group/world scheme.
+          POSIX Access Control Lists (ACLs) support additional access rights
+          for users and groups beyond the standard owner/group/world scheme,
+          and this option selects support for ACLs specifically for tmpfs
+          filesystems.
+
+          If you've selected TMPFS, it's possible that you'll also need
+          this option as there are a number of Linux distros that require
+          POSIX ACL support under /dev for certain features to work properly.
+          For example, some distros need this feature for ALSA-related /dev
+          files for sound to work properly.  In short, if you're not sure,
+          say Y.
 
           To learn more about Access Control Lists, visit the POSIX ACLs for
           Linux website <http://acl.bestbits.at/>.
 
-          If you don't know what Access Control Lists are, say N.
-
 config TMPFS_XATTR
         bool "Tmpfs extended attributes"
         depends on TMPFS
diff --git a/fs/dcache.c b/fs/dcache.c
index 2347cdb15abb..c83cae19161e 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -795,6 +795,7 @@ relock:
 
 /**
  * prune_dcache_sb - shrink the dcache
+ * @sb: superblock
  * @nr_to_scan: number of entries to try to free
  *
  * Attempt to shrink the superblock dcache LRU by @nr_to_scan entries. This is
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index e2d88baf91d3..4687fea0c00f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -124,7 +124,7 @@ void *ext4_kvzalloc(size_t size, gfp_t flags)
 {
         void *ret;
 
-        ret = kmalloc(size, flags);
+        ret = kzalloc(size, flags);
         if (!ret)
                 ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
         return ret;
diff --git a/fs/stack.c b/fs/stack.c
index 4a6f7f440658..b4f2ab48a61f 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -29,10 +29,7 @@ void fsstack_copy_inode_size(struct inode *dst, struct inode *src)
          *
          * We don't actually know what locking is used at the lower level;
          * but if it's a filesystem that supports quotas, it will be using
-         * i_lock as in inode_add_bytes().  tmpfs uses other locking, and
-         * its 32-bit is (just) able to exceed 2TB i_size with the aid of
-         * holes; but its i_blocks cannot carry into the upper long without
-         * almost 2TB swap - let's ignore that case.
+         * i_lock as in inode_add_bytes().
          */
         if (sizeof(i_blocks) > sizeof(long))
                 spin_lock(&src->i_lock);
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index 3090471b2a5e..e49c36d38d7e 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -128,7 +128,7 @@ extern int is_dock_device(acpi_handle handle);
 extern int register_dock_notifier(struct notifier_block *nb);
 extern void unregister_dock_notifier(struct notifier_block *nb);
 extern int register_hotplug_dock_device(acpi_handle handle,
-                                        struct acpi_dock_ops *ops,
+                                        const struct acpi_dock_ops *ops,
                                         void *context);
 extern void unregister_hotplug_dock_device(acpi_handle handle);
 #else
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 2ed0a8486c19..f554a9313b43 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -47,7 +47,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20110413
+#define ACPI_CA_VERSION                 0x20110623
 
 #include "actypes.h"
 #include "actbl.h"
@@ -69,6 +69,7 @@ extern u32 acpi_gbl_trace_flags;
 extern u32 acpi_gbl_enable_aml_debug_object;
 extern u8 acpi_gbl_copy_dsdt_locally;
 extern u8 acpi_gbl_truncate_io_addresses;
+extern u8 acpi_gbl_disable_auto_repair;
 
 extern u32 acpi_current_gpe_count;
 extern struct acpi_table_fadt acpi_gbl_FADT;
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index e67b523a50e1..51a527d24a8a 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -18,6 +18,11 @@
 
 extern int hest_disable;
 extern int erst_disable;
+#ifdef CONFIG_ACPI_APEI_GHES
+extern int ghes_disable;
+#else
+#define ghes_disable 1
+#endif
 
 #ifdef CONFIG_ACPI_APEI
 void __init acpi_hest_init(void);
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index ba4928cae473..67055f180330 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -337,7 +337,7 @@ extern struct cpuidle_driver acpi_idle_driver;
 
 /* in processor_thermal.c */
 int acpi_processor_get_limit_info(struct acpi_processor *pr);
-extern struct thermal_cooling_device_ops processor_cooling_ops;
+extern const struct thermal_cooling_device_ops processor_cooling_ops;
 #ifdef CONFIG_CPU_FREQ
 void acpi_thermal_cpufreq_init(void);
 void acpi_thermal_cpufreq_exit(void);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 1deb2a73c2da..6001b4da39dd 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -238,7 +238,6 @@ extern int acpi_paddr_to_node(u64 start_addr, u64 size);
 extern int pnpacpi_disabled;
 
 #define PXM_INVAL       (-1)
-#define NID_INVAL       (-1)
 
 int acpi_check_resource_conflict(const struct resource *res);
 
@@ -280,6 +279,8 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 #define OSC_SB_CPUHP_OST_SUPPORT        8
 #define OSC_SB_APEI_SUPPORT             16
 
+extern bool osc_sb_apei_support_acked;
+
 /* PCI defined _OSC bits */
 /* _OSC DW1 Definition (OS Support Fields) */
 #define OSC_EXT_PCI_CONFIG_SUPPORT              1
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 3bac44cce142..7ad634501e48 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -146,6 +146,7 @@ extern int bitmap_allocate_region(unsigned long *bitmap, int pos, int order);
 extern void bitmap_copy_le(void *dst, const unsigned long *src, int nbits);
 extern int bitmap_ord_to_pos(const unsigned long *bitmap, int n, int bits);
 
+#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG))
 #define BITMAP_LAST_WORD_MASK(nbits)                                    \
 (                                                                       \
         ((nbits) % BITS_PER_LONG) ?                                     \
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 36719ead50e8..b51629e15cfc 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -122,6 +122,8 @@ struct cpuidle_driver {
 };
 
 #ifdef CONFIG_CPU_IDLE
+extern void disable_cpuidle(void);
+extern int cpuidle_idle_call(void);
 
 extern int cpuidle_register_driver(struct cpuidle_driver *drv);
 struct cpuidle_driver *cpuidle_get_driver(void);
@@ -135,6 +137,8 @@ extern int cpuidle_enable_device(struct cpuidle_device *dev);
 extern void cpuidle_disable_device(struct cpuidle_device *dev);
 
 #else
+static inline void disable_cpuidle(void) { }
+static inline int cpuidle_idle_call(void) { return -ENODEV; }
 
 static inline int cpuidle_register_driver(struct cpuidle_driver *drv)
 {return -ENODEV; }
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 3ff060ac7810..c6f996f2abb6 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -25,10 +25,6 @@ struct fault_attr {
         unsigned long reject_end;
 
         unsigned long count;
-
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-        struct dentry *dir;
-#endif
 };
 
 #define FAULT_ATTR_INITIALIZER {                                \
@@ -45,19 +41,15 @@ bool should_fail(struct fault_attr *attr, ssize_t size);
 
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 
-int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
-void cleanup_fault_attr_dentries(struct fault_attr *attr);
+struct dentry *fault_create_debugfs_attr(const char *name,
+                        struct dentry *parent, struct fault_attr *attr);
 
 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
 
-static inline int init_fault_attr_dentries(struct fault_attr *attr,
-                                          const char *name)
-{
-        return -ENODEV;
-}
-
-static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
+static inline struct dentry *fault_create_debugfs_attr(const char *name,
+                        struct dentry *parent, struct fault_attr *attr)
 {
+        return ERR_PTR(-ENODEV);
 }
 
 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h
index 5bbebda78b02..5e98eeb2af3b 100644
--- a/include/linux/genalloc.h
+++ b/include/linux/genalloc.h
@@ -1,8 +1,26 @@
 /*
- * Basic general purpose allocator for managing special purpose memory
- * not managed by the regular kmalloc/kfree interface.
- * Uses for this includes on-device special memory, uncached memory
- * etc.
+ * Basic general purpose allocator for managing special purpose
+ * memory, for example, memory that is not managed by the regular
+ * kmalloc/kfree interface.  Uses for this includes on-device special
+ * memory, uncached memory etc.
+ *
+ * It is safe to use the allocator in NMI handlers and other special
+ * unblockable contexts that could otherwise deadlock on locks.  This
+ * is implemented by using atomic operations and retries on any
+ * conflicts.  The disadvantage is that there may be livelocks in
+ * extreme cases.  For better scalability, one allocator can be used
+ * for each CPU.
+ *
+ * The lockless operation only works if there is enough memory
+ * available.  If new memory is added to the pool a lock has to be
+ * still taken.  So any user relying on locklessness has to ensure
+ * that sufficient memory is preallocated.
+ *
+ * The basic atomic operation of this allocator is cmpxchg on long.
+ * On architectures that don't have NMI-safe cmpxchg implementation,
+ * the allocator can NOT be used in NMI handler.  So code uses the
+ * allocator in NMI handler should depend on
+ * CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
  *
  * This source code is licensed under the GNU General Public License,
  * Version 2.  See the file COPYING for more details.
@@ -15,7 +33,7 @@
  *  General purpose special memory pool descriptor.
  */
 struct gen_pool {
-        rwlock_t lock;
+        spinlock_t lock;
         struct list_head chunks;        /* list of chunks in this pool */
         int min_alloc_order;            /* minimum allocation order */
 };
@@ -24,8 +42,8 @@ struct gen_pool {
  *  General purpose special memory pool chunk descriptor.
  */
 struct gen_pool_chunk {
-        spinlock_t lock;
         struct list_head next_chunk;    /* next chunk in pool */
+        atomic_t avail;
         phys_addr_t phys_addr;          /* physical starting address of memory chunk */
         unsigned long start_addr;       /* starting address of memory chunk */
         unsigned long end_addr;         /* ending address of memory chunk */
@@ -56,4 +74,8 @@ static inline int gen_pool_add(struct gen_pool *pool, unsigned long addr,
 extern void gen_pool_destroy(struct gen_pool *);
 extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
 extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);
+extern void gen_pool_for_each_chunk(struct gen_pool *,
+        void (*)(struct gen_pool *, struct gen_pool_chunk *, void *), void *);
+extern size_t gen_pool_avail(struct gen_pool *);
+extern size_t gen_pool_size(struct gen_pool *);
 #endif /* __GENALLOC_H__ */
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index cb4089254f01..3a76faf6a3ee 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -92,7 +92,7 @@ struct vm_area_struct;
  */
 #define __GFP_NOTRACK_FALSE_POSITIVE (__GFP_NOTRACK)
 
-#define __GFP_BITS_SHIFT 23     /* Room for 23 __GFP_FOO bits */
+#define __GFP_BITS_SHIFT 24     /* Room for N __GFP_FOO bits */
 #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
 
 /* This equals 0, but use constants in case they ever change */
diff --git a/include/linux/idr.h b/include/linux/idr.h
index 13a801f3d028..255491cf522e 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -146,6 +146,10 @@ void ida_remove(struct ida *ida, int id);
 void ida_destroy(struct ida *ida);
 void ida_init(struct ida *ida);
 
+int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
+                   gfp_t gfp_mask);
+void ida_simple_remove(struct ida *ida, unsigned int id);
+
 void __init idr_init_cache(void);
 
 #endif /* __IDR_H__ */
diff --git a/include/linux/llist.h b/include/linux/llist.h
new file mode 100644
index 000000000000..aa0c8b5b3cd0
--- /dev/null
+++ b/include/linux/llist.h
@@ -0,0 +1,126 @@
+#ifndef LLIST_H
+#define LLIST_H
+/*
+ * Lock-less NULL terminated single linked list
+ *
+ * If there are multiple producers and multiple consumers, llist_add
+ * can be used in producers and llist_del_all can be used in
+ * consumers.  They can work simultaneously without lock.  But
+ * llist_del_first can not be used here.  Because llist_del_first
+ * depends on list->first->next does not changed if list->first is not
+ * changed during its operation, but llist_del_first, llist_add,
+ * llist_add (or llist_del_all, llist_add, llist_add) sequence in
+ * another consumer may violate that.
+ *
+ * If there are multiple producers and one consumer, llist_add can be
+ * used in producers and llist_del_all or llist_del_first can be used
+ * in the consumer.
+ *
+ * This can be summarized as follow:
+ *
+ *           |   add    | del_first |  del_all
+ * add       |    -     |     -     |     -
+ * del_first |          |     L     |     L
+ * del_all   |          |           |     -
+ *
+ * Where "-" stands for no lock is needed, while "L" stands for lock
+ * is needed.
+ *
+ * The list entries deleted via llist_del_all can be traversed with
+ * traversing function such as llist_for_each etc.  But the list
+ * entries can not be traversed safely before deleted from the list.
+ * The order of deleted entries is from the newest to the oldest added
+ * one.  If you want to traverse from the oldest to the newest, you
+ * must reverse the order by yourself before traversing.
+ *
+ * The basic atomic operation of this list is cmpxchg on long.  On
+ * architectures that don't have NMI-safe cmpxchg implementation, the
+ * list can NOT be used in NMI handler.  So code uses the list in NMI
+ * handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
+ */
+
+struct llist_head {
+        struct llist_node *first;
+};
+
+struct llist_node {
+        struct llist_node *next;
+};
+
+#define LLIST_HEAD_INIT(name)   { NULL }
+#define LLIST_HEAD(name)        struct llist_head name = LLIST_HEAD_INIT(name)
+
+/**
+ * init_llist_head - initialize lock-less list head
+ * @head:       the head for your lock-less list
+ */
+static inline void init_llist_head(struct llist_head *list)
+{
+        list->first = NULL;
+}
+
+/**
+ * llist_entry - get the struct of this entry
+ * @ptr:        the &struct llist_node pointer.
+ * @type:       the type of the struct this is embedded in.
+ * @member:     the name of the llist_node within the struct.
+ */
+#define llist_entry(ptr, type, member)          \
+        container_of(ptr, type, member)
+
+/**
+ * llist_for_each - iterate over some deleted entries of a lock-less list
+ * @pos:        the &struct llist_node to use as a loop cursor
+ * @node:       the first entry of deleted list entries
+ *
+ * In general, some entries of the lock-less list can be traversed
+ * safely only after being deleted from list, so start with an entry
+ * instead of list head.
+ *
+ * If being used on entries deleted from lock-less list directly, the
+ * traverse order is from the newest to the oldest added entry.  If
+ * you want to traverse from the oldest to the newest, you must
+ * reverse the order by yourself before traversing.
+ */
+#define llist_for_each(pos, node)                       \
+        for ((pos) = (node); pos; (pos) = (pos)->next)
+
+/**
+ * llist_for_each_entry - iterate over some deleted entries of lock-less list of given type
+ * @pos:        the type * to use as a loop cursor.
+ * @node:       the fist entry of deleted list entries.
+ * @member:     the name of the llist_node with the struct.
+ *
+ * In general, some entries of the lock-less list can be traversed
+ * safely only after being removed from list, so start with an entry
+ * instead of list head.
+ *
+ * If being used on entries deleted from lock-less list directly, the
+ * traverse order is from the newest to the oldest added entry.  If
+ * you want to traverse from the oldest to the newest, you must
+ * reverse the order by yourself before traversing.
+ */
+#define llist_for_each_entry(pos, node, member)                         \
+        for ((pos) = llist_entry((node), typeof(*(pos)), member);       \
+             &(pos)->member != NULL;                                    \
+             (pos) = llist_entry((pos)->member.next, typeof(*(pos)), member))
+
+/**
+ * llist_empty - tests whether a lock-less list is empty
+ * @head:       the list to test
+ *
+ * Not guaranteed to be accurate or up to date.  Just a quick way to
+ * test whether the list is empty without deleting something from the
+ * list.
+ */
+static inline int llist_empty(const struct llist_head *head)
+{
+        return ACCESS_ONCE(head->first) == NULL;
+}
+
+void llist_add(struct llist_node *new, struct llist_head *head);
+void llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
+                     struct llist_head *head);
+struct llist_node *llist_del_first(struct llist_head *head);
+struct llist_node *llist_del_all(struct llist_head *head);
+#endif /* LLIST_H */
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index b96600786913..3b535db00a94 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -86,8 +86,6 @@ extern void mem_cgroup_uncharge_end(void);
 
 extern void mem_cgroup_uncharge_page(struct page *page);
 extern void mem_cgroup_uncharge_cache_page(struct page *page);
-extern int mem_cgroup_shmem_charge_fallback(struct page *page,
-                        struct mm_struct *mm, gfp_t gfp_mask);
 
 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
@@ -225,12 +223,6 @@ static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 {
 }
 
-static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
-                        struct mm_struct *mm, gfp_t gfp_mask)
-{
-        return 0;
-}
-
 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
 {
 }
diff --git a/include/linux/mfd/aat2870.h b/include/linux/mfd/aat2870.h
index 89212df05622..f7316c29bdec 100644
--- a/include/linux/mfd/aat2870.h
+++ b/include/linux/mfd/aat2870.h
@@ -89,7 +89,7 @@ enum aat2870_id {
 
 /* Backlight current magnitude (mA) */
 enum aat2870_current {
-        AAT2870_CURRENT_0_45,
+        AAT2870_CURRENT_0_45 = 1,
         AAT2870_CURRENT_0_90,
         AAT2870_CURRENT_1_80,
         AAT2870_CURRENT_2_70,
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3172a1c0f08e..f2690cf49827 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1600,6 +1600,7 @@ enum mf_flags {
 };
 extern void memory_failure(unsigned long pfn, int trapno);
 extern int __memory_failure(unsigned long pfn, int trapno, int flags);
+extern void memory_failure_queue(unsigned long pfn, int trapno, int flags);
 extern int unpoison_memory(unsigned long pfn);
 extern int sysctl_memory_failure_early_kill;
 extern int sysctl_memory_failure_recovery;
diff --git a/include/linux/of.h b/include/linux/of.h
index 0085bb01c041..bc3dc6399547 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -68,6 +68,7 @@ struct device_node {
 /* Pointer for first entry in chain of all nodes. */
 extern struct device_node *allnodes;
 extern struct device_node *of_chosen;
+extern struct device_node *of_aliases;
 extern rwlock_t devtree_lock;
 
 static inline bool of_have_populated_dt(void)
@@ -209,6 +210,9 @@ extern int of_device_is_available(const struct device_node *device);
 extern const void *of_get_property(const struct device_node *node,
                                 const char *name,
                                 int *lenp);
+#define for_each_property(pp, properties) \
+        for (pp = properties; pp != NULL; pp = pp->next)
+
 extern int of_n_addr_cells(struct device_node *np);
 extern int of_n_size_cells(struct device_node *np);
 extern const struct of_device_id *of_match_node(
@@ -221,6 +225,10 @@ extern int of_parse_phandles_with_args(struct device_node *np,
         const char *list_name, const char *cells_name, int index,
         struct device_node **out_node, const void **out_args);
 
+extern void *early_init_dt_alloc_memory_arch(u64 size, u64 align);
+extern void of_alias_scan(void);
+extern int of_alias_get_id(struct device_node *np, const char *stem);
+
 extern int of_machine_is_compatible(const char *compat);
 
 extern int prom_add_property(struct device_node* np, struct property* prop);
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index c84d900fbbb3..b74b74ffe0e7 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -97,7 +97,6 @@ extern void early_init_dt_check_for_initrd(unsigned long node);
 extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
                                      int depth, void *data);
 extern void early_init_dt_add_memory_arch(u64 base, u64 size);
-extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
 extern u64 dt_mem_next_cell(int s, __be32 **cellp);
 
 /*
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 23241c2fecce..9d4539c52e53 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -39,7 +39,15 @@
  * when it is shrunk, before we rcu free the node. See shrink code for
  * details.
  */
-#define RADIX_TREE_INDIRECT_PTR 1
+#define RADIX_TREE_INDIRECT_PTR         1
+/*
+ * A common use of the radix tree is to store pointers to struct pages;
+ * but shmem/tmpfs needs also to store swap entries in the same tree:
+ * those are marked as exceptional entries to distinguish them.
+ * EXCEPTIONAL_ENTRY tests the bit, EXCEPTIONAL_SHIFT shifts content past it.
+ */
+#define RADIX_TREE_EXCEPTIONAL_ENTRY    2
+#define RADIX_TREE_EXCEPTIONAL_SHIFT    2
 
 #define radix_tree_indirect_to_ptr(ptr) \
         radix_tree_indirect_to_ptr((void __force *)(ptr))
@@ -174,6 +182,28 @@ static inline int radix_tree_deref_retry(void *arg)
 }
 
 /**
+ * radix_tree_exceptional_entry - radix_tree_deref_slot gave exceptional entry?
+ * @arg:        value returned by radix_tree_deref_slot
+ * Returns:     0 if well-aligned pointer, non-0 if exceptional entry.
+ */
+static inline int radix_tree_exceptional_entry(void *arg)
+{
+        /* Not unlikely because radix_tree_exception often tested first */
+        return (unsigned long)arg & RADIX_TREE_EXCEPTIONAL_ENTRY;
+}
+
+/**
+ * radix_tree_exception - radix_tree_deref_slot returned either exception?
+ * @arg:        value returned by radix_tree_deref_slot
+ * Returns:     0 if well-aligned pointer, non-0 if either kind of exception.
+ */
+static inline int radix_tree_exception(void *arg)
+{
+        return unlikely((unsigned long)arg &
+                (RADIX_TREE_INDIRECT_PTR | RADIX_TREE_EXCEPTIONAL_ENTRY));
+}
+
+/**
  * radix_tree_replace_slot      - replace item in a slot
  * @pslot:      pointer to slot, returned by radix_tree_lookup_slot
  * @item:       new item to store in the slot.
@@ -194,8 +224,8 @@ void *radix_tree_delete(struct radix_tree_root *, unsigned long);
 unsigned int
 radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
                         unsigned long first_index, unsigned int max_items);
-unsigned int
-radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results,
+unsigned int radix_tree_gang_lookup_slot(struct radix_tree_root *root,
+                        void ***results, unsigned long *indices,
                         unsigned long first_index, unsigned int max_items);
 unsigned long radix_tree_next_hole(struct radix_tree_root *root,
                                 unsigned long index, unsigned long max_scan);
@@ -222,6 +252,7 @@ unsigned long radix_tree_range_tag_if_tagged(struct radix_tree_root *root,
                 unsigned long nr_to_tag,
                 unsigned int fromtag, unsigned int totag);
 int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag);
+unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item);
 
 static inline void radix_tree_preload_end(void)
 {
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index aa08fa8fd79b..9291ac3cc627 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -8,22 +8,15 @@
 
 /* inode in-kernel data */
 
-#define SHMEM_NR_DIRECT 16
-
-#define SHMEM_SYMLINK_INLINE_LEN (SHMEM_NR_DIRECT * sizeof(swp_entry_t))
-
 struct shmem_inode_info {
         spinlock_t              lock;
         unsigned long           flags;
         unsigned long           alloced;        /* data pages alloced to file */
-        unsigned long           swapped;        /* subtotal assigned to swap */
-        unsigned long           next_index;     /* highest alloced index + 1 */
-        struct shared_policy    policy;         /* NUMA memory alloc policy */
-        struct page             *i_indirect;    /* top indirect blocks page */
         union {
-                swp_entry_t     i_direct[SHMEM_NR_DIRECT]; /* first blocks */
-                char            inline_symlink[SHMEM_SYMLINK_INLINE_LEN];
+                unsigned long   swapped;        /* subtotal assigned to swap */
+                char            *symlink;       /* unswappable short symlink */
         };
+        struct shared_policy    policy;         /* NUMA memory alloc policy */
         struct list_head        swaplist;       /* chain of maybes on swap */
         struct list_head        xattr_list;     /* list of shmem_xattr */
         struct inode            vfs_inode;
@@ -49,7 +42,7 @@ static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
 /*
  * Functions in mm/shmem.c called directly from elsewhere:
  */
-extern int init_tmpfs(void);
+extern int shmem_init(void);
 extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
 extern struct file *shmem_file_setup(const char *name,
                                         loff_t size, unsigned long flags);
@@ -59,8 +52,6 @@ extern struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
                                         pgoff_t index, gfp_t gfp_mask);
 extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end);
 extern int shmem_unuse(swp_entry_t entry, struct page *page);
-extern void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
-                                        struct page **pagep, swp_entry_t *ent);
 
 static inline struct page *shmem_read_mapping_page(
                                 struct address_space *mapping, pgoff_t index)
diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index cd42e30b7c6e..2189d3ffc85d 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -1,3 +1,8 @@
+#ifndef _LINUX_SWAPOPS_H
+#define _LINUX_SWAPOPS_H
+
+#include <linux/radix-tree.h>
+
 /*
  * swapcache pages are stored in the swapper_space radix tree.  We want to
  * get good packing density in that tree, so the index should be dense in
@@ -76,6 +81,22 @@ static inline pte_t swp_entry_to_pte(swp_entry_t entry)
         return __swp_entry_to_pte(arch_entry);
 }
 
+static inline swp_entry_t radix_to_swp_entry(void *arg)
+{
+        swp_entry_t entry;
+
+        entry.val = (unsigned long)arg >> RADIX_TREE_EXCEPTIONAL_SHIFT;
+        return entry;
+}
+
+static inline void *swp_to_radix_entry(swp_entry_t entry)
+{
+        unsigned long value;
+
+        value = entry.val << RADIX_TREE_EXCEPTIONAL_SHIFT;
+        return (void *)(value | RADIX_TREE_EXCEPTIONAL_ENTRY);
+}
+
 #ifdef CONFIG_MIGRATION
 static inline swp_entry_t make_migration_entry(struct page *page, int write)
 {
@@ -169,3 +190,5 @@ static inline int non_swap_entry(swp_entry_t entry)
         return 0;
 }
 #endif
+
+#endif /* _LINUX_SWAPOPS_H */
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index d3ec89fb4122..47b4a27e6e97 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -85,22 +85,6 @@ struct thermal_cooling_device {
                                 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
 #define CELSIUS_TO_KELVIN(t)    ((t)*10+2732)
 
-#if defined(CONFIG_THERMAL_HWMON)
-/* thermal zone devices with the same type share one hwmon device */
-struct thermal_hwmon_device {
-        char type[THERMAL_NAME_LENGTH];
-        struct device *device;
-        int count;
-        struct list_head tz_list;
-        struct list_head node;
-};
-
-struct thermal_hwmon_attr {
-        struct device_attribute attr;
-        char name[16];
-};
-#endif
-
 struct thermal_zone_device {
         int id;
         char type[THERMAL_NAME_LENGTH];
@@ -120,12 +104,6 @@ struct thermal_zone_device {
         struct mutex lock;      /* protect cooling devices list */
         struct list_head node;
         struct delayed_work poll_queue;
-#if defined(CONFIG_THERMAL_HWMON)
-        struct list_head hwmon_node;
-        struct thermal_hwmon_device *hwmon;
-        struct thermal_hwmon_attr temp_input;   /* hwmon sys attr */
-        struct thermal_hwmon_attr temp_crit;    /* hwmon sys attr */
-#endif
 };
 /* Adding event notification support elements */
 #define THERMAL_GENL_FAMILY_NAME                "thermal_event"
diff --git a/init/main.c b/init/main.c
index d7211faed2ad..9c51ee7adf3d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -369,9 +369,12 @@ static noinline void __init_refok rest_init(void)
         init_idle_bootup_task(current);
         preempt_enable_no_resched();
         schedule();
-        preempt_disable();
+
+        /* At this point, we can enable user mode helper functionality */
+        usermodehelper_enable();
 
         /* Call into cpu_idle with preempt disabled */
+        preempt_disable();
         cpu_idle();
 }
 
@@ -715,7 +718,7 @@ static void __init do_basic_setup(void)
 {
         cpuset_init_smp();
         usermodehelper_init();
-        init_tmpfs();
+        shmem_init();
         driver_init();
         init_irq_proc();
         do_ctors();
diff --git a/ipc/shm.c b/ipc/shm.c
index 9fb044f3b345..b5bae9d945b6 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -294,7 +294,7 @@ static int shm_try_destroy_orphaned(int id, void *p, void *data)
 void shm_destroy_orphaned(struct ipc_namespace *ns)
 {
         down_write(&shm_ids(ns).rw_mutex);
-        if (&shm_ids(ns).in_use)
+        if (shm_ids(ns).in_use)
                 idr_for_each(&shm_ids(ns).ipcs_idr, &shm_try_destroy_orphaned, ns);
         up_write(&shm_ids(ns).rw_mutex);
 }
@@ -304,9 +304,12 @@ void exit_shm(struct task_struct *task)
 {
         struct ipc_namespace *ns = task->nsproxy->ipc_ns;
 
+        if (shm_ids(ns).in_use == 0)
+                return;
+
         /* Destroy all already created segments, but not mapped yet */
         down_write(&shm_ids(ns).rw_mutex);
-        if (&shm_ids(ns).in_use)
+        if (shm_ids(ns).in_use)
                 idr_for_each(&shm_ids(ns).ipcs_idr, &shm_try_destroy_current, ns);
         up_write(&shm_ids(ns).rw_mutex);
 }
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 47613dfb7b28..ddc7644c1305 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -274,7 +274,7 @@ static void __call_usermodehelper(struct work_struct *work)
  * (used for preventing user land processes from being created after the user
  * land has been frozen during a system-wide hibernation or suspend operation).
  */
-static int usermodehelper_disabled;
+static int usermodehelper_disabled = 1;
 
 /* Number of helpers running */
 static atomic_t running_helpers = ATOMIC_INIT(0);
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index d1db2880d1cf..e19ce1454ee1 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -291,30 +291,28 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
         if (!cpumask_subset(mask, cpu_possible_mask))
                 return -EINVAL;
 
-        s = NULL;
         if (isadd == REGISTER) {
                 for_each_cpu(cpu, mask) {
-                        if (!s)
-                                s = kmalloc_node(sizeof(struct listener),
-                                                 GFP_KERNEL, cpu_to_node(cpu));
+                        s = kmalloc_node(sizeof(struct listener),
+                                        GFP_KERNEL, cpu_to_node(cpu));
                         if (!s)
                                 goto cleanup;
+
                         s->pid = pid;
-                        INIT_LIST_HEAD(&s->list);
                         s->valid = 1;
 
                         listeners = &per_cpu(listener_array, cpu);
                         down_write(&listeners->sem);
-                        list_for_each_entry_safe(s2, tmp, &listeners->list, list) {
-                                if (s2->pid == pid)
-                                        goto next_cpu;
+                        list_for_each_entry(s2, &listeners->list, list) {
+                                if (s2->pid == pid && s2->valid)
+                                        goto exists;
                         }
                         list_add(&s->list, &listeners->list);
                         s = NULL;
-next_cpu:
+exists:
                         up_write(&listeners->sem);
+                        kfree(s); /* nop if NULL */
                 }
-                kfree(s);
                 return 0;
         }
 
diff --git a/lib/Kconfig b/lib/Kconfig
index 32f3e5ae2be5..6c695ff9caba 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -276,4 +276,7 @@ config CORDIC
           so its calculations are in fixed point. Modules can select this
           when they require this function. Module will be called cordic.
 
+config LLIST
+        bool
+
 endmenu
diff --git a/lib/Makefile b/lib/Makefile
index 892f4e282ea1..6457af4a7caf 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -115,6 +115,8 @@ obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
 
 obj-$(CONFIG_CORDIC) += cordic.o
 
+obj-$(CONFIG_LLIST) += llist.o
+
 hostprogs-y     := gen_crc32table
 clean-files     := crc32table.h
 
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 37ef4b048795..2f4412e4d071 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -271,8 +271,6 @@ int __bitmap_weight(const unsigned long *bitmap, int bits)
 }
 EXPORT_SYMBOL(__bitmap_weight);
 
-#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG))
-
 void bitmap_set(unsigned long *map, int start, int nr)
 {
         unsigned long *p = map + BIT_WORD(start);
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index 2577b121c7c1..f193b7796449 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -197,21 +197,15 @@ static struct dentry *debugfs_create_atomic_t(const char *name, mode_t mode,
         return debugfs_create_file(name, mode, parent, value, &fops_atomic_t);
 }
 
-void cleanup_fault_attr_dentries(struct fault_attr *attr)
-{
-        debugfs_remove_recursive(attr->dir);
-}
-
-int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
+struct dentry *fault_create_debugfs_attr(const char *name,
+                        struct dentry *parent, struct fault_attr *attr)
 {
         mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
         struct dentry *dir;
 
-        dir = debugfs_create_dir(name, NULL);
+        dir = debugfs_create_dir(name, parent);
         if (!dir)
-                return -ENOMEM;
-
-        attr->dir = dir;
+                return ERR_PTR(-ENOMEM);
 
         if (!debugfs_create_ul("probability", mode, dir, &attr->probability))
                 goto fail;
@@ -243,11 +237,11 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
 
 #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
 
-        return 0;
+        return dir;
 fail:
-        debugfs_remove_recursive(attr->dir);
+        debugfs_remove_recursive(dir);
 
-        return -ENOMEM;
+        return ERR_PTR(-ENOMEM);
 }
 
 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
diff --git a/lib/genalloc.c b/lib/genalloc.c
index 577ddf805975..f352cc42f4f8 100644
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -1,8 +1,26 @@
 /*
- * Basic general purpose allocator for managing special purpose memory
- * not managed by the regular kmalloc/kfree interface.
- * Uses for this includes on-device special memory, uncached memory
- * etc.
+ * Basic general purpose allocator for managing special purpose
+ * memory, for example, memory that is not managed by the regular
+ * kmalloc/kfree interface.  Uses for this includes on-device special
+ * memory, uncached memory etc.
+ *
+ * It is safe to use the allocator in NMI handlers and other special
+ * unblockable contexts that could otherwise deadlock on locks.  This
+ * is implemented by using atomic operations and retries on any
+ * conflicts.  The disadvantage is that there may be livelocks in
+ * extreme cases.  For better scalability, one allocator can be used
+ * for each CPU.
+ *
+ * The lockless operation only works if there is enough memory
+ * available.  If new memory is added to the pool a lock has to be
+ * still taken.  So any user relying on locklessness has to ensure
+ * that sufficient memory is preallocated.
+ *
+ * The basic atomic operation of this allocator is cmpxchg on long.
+ * On architectures that don't have NMI-safe cmpxchg implementation,
+ * the allocator can NOT be used in NMI handler.  So code uses the
+ * allocator in NMI handler should depend on
+ * CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
  *
  * Copyright 2005 (C) Jes Sorensen <jes@trained-monkey.org>
  *
@@ -13,8 +31,109 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/bitmap.h>
+#include <linux/rculist.h>
+#include <linux/interrupt.h>
 #include <linux/genalloc.h>
 
+static int set_bits_ll(unsigned long *addr, unsigned long mask_to_set)
+{
+        unsigned long val, nval;
+
+        nval = *addr;
+        do {
+                val = nval;
+                if (val & mask_to_set)
+                        return -EBUSY;
+                cpu_relax();
+        } while ((nval = cmpxchg(addr, val, val | mask_to_set)) != val);
+
+        return 0;
+}
+
+static int clear_bits_ll(unsigned long *addr, unsigned long mask_to_clear)
+{
+        unsigned long val, nval;
+
+        nval = *addr;
+        do {
+                val = nval;
+                if ((val & mask_to_clear) != mask_to_clear)
+                        return -EBUSY;
+                cpu_relax();
+        } while ((nval = cmpxchg(addr, val, val & ~mask_to_clear)) != val);
+
+        return 0;
+}
+
+/*
+ * bitmap_set_ll - set the specified number of bits at the specified position
+ * @map: pointer to a bitmap
+ * @start: a bit position in @map
+ * @nr: number of bits to set
+ *
+ * Set @nr bits start from @start in @map lock-lessly. Several users
+ * can set/clear the same bitmap simultaneously without lock. If two
+ * users set the same bit, one user will return remain bits, otherwise
+ * return 0.
+ */
+static int bitmap_set_ll(unsigned long *map, int start, int nr)
+{
+        unsigned long *p = map + BIT_WORD(start);
+        const int size = start + nr;
+        int bits_to_set = BITS_PER_LONG - (start % BITS_PER_LONG);
+        unsigned long mask_to_set = BITMAP_FIRST_WORD_MASK(start);
+
+        while (nr - bits_to_set >= 0) {
+                if (set_bits_ll(p, mask_to_set))
+                        return nr;
+                nr -= bits_to_set;
+                bits_to_set = BITS_PER_LONG;
+                mask_to_set = ~0UL;
+                p++;
+        }
+        if (nr) {
+                mask_to_set &= BITMAP_LAST_WORD_MASK(size);
+                if (set_bits_ll(p, mask_to_set))
+                        return nr;
+        }
+
+        return 0;
+}
+
+/*
+ * bitmap_clear_ll - clear the specified number of bits at the specified position
+ * @map: pointer to a bitmap
+ * @start: a bit position in @map
+ * @nr: number of bits to set
+ *
+ * Clear @nr bits start from @start in @map lock-lessly. Several users
+ * can set/clear the same bitmap simultaneously without lock. If two
+ * users clear the same bit, one user will return remain bits,
+ * otherwise return 0.
+ */
+static int bitmap_clear_ll(unsigned long *map, int start, int nr)
+{
+        unsigned long *p = map + BIT_WORD(start);
+        const int size = start + nr;
+        int bits_to_clear = BITS_PER_LONG - (start % BITS_PER_LONG);
+        unsigned long mask_to_clear = BITMAP_FIRST_WORD_MASK(start);
+
+        while (nr - bits_to_clear >= 0) {
+                if (clear_bits_ll(p, mask_to_clear))
+                        return nr;
+                nr -= bits_to_clear;
+                bits_to_clear = BITS_PER_LONG;
+                mask_to_clear = ~0UL;
+                p++;
+        }
+        if (nr) {
+                mask_to_clear &= BITMAP_LAST_WORD_MASK(size);
+                if (clear_bits_ll(p, mask_to_clear))
+                        return nr;
+        }
+
+        return 0;
+}
 
 /**
  * gen_pool_create - create a new special memory pool
@@ -30,7 +149,7 @@ struct gen_pool *gen_pool_create(int min_alloc_order, int nid)
 
         pool = kmalloc_node(sizeof(struct gen_pool), GFP_KERNEL, nid);
         if (pool != NULL) {
-                rwlock_init(&pool->lock);
+                spin_lock_init(&pool->lock);
                 INIT_LIST_HEAD(&pool->chunks);
                 pool->min_alloc_order = min_alloc_order;
         }
@@ -63,14 +182,14 @@ int gen_pool_add_virt(struct gen_pool *pool, unsigned long virt, phys_addr_t phy
         if (unlikely(chunk == NULL))
                 return -ENOMEM;
 
-        spin_lock_init(&chunk->lock);
         chunk->phys_addr = phys;
         chunk->start_addr = virt;
         chunk->end_addr = virt + size;
+        atomic_set(&chunk->avail, size);
 
-        write_lock(&pool->lock);
-        list_add(&chunk->next_chunk, &pool->chunks);
-        write_unlock(&pool->lock);
+        spin_lock(&pool->lock);
+        list_add_rcu(&chunk->next_chunk, &pool->chunks);
+        spin_unlock(&pool->lock);
 
         return 0;
 }
@@ -85,19 +204,19 @@ EXPORT_SYMBOL(gen_pool_add_virt);
  */
 phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long addr)
 {
-        struct list_head *_chunk;
         struct gen_pool_chunk *chunk;
+        phys_addr_t paddr = -1;
 
-        read_lock(&pool->lock);
-        list_for_each(_chunk, &pool->chunks) {
-                chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
-
-                if (addr >= chunk->start_addr && addr < chunk->end_addr)
-                        return chunk->phys_addr + addr - chunk->start_addr;
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
+                if (addr >= chunk->start_addr && addr < chunk->end_addr) {
+                        paddr = chunk->phys_addr + (addr - chunk->start_addr);
+                        break;
+                }
         }
-        read_unlock(&pool->lock);
+        rcu_read_unlock();
 
-        return -1;
+        return paddr;
 }
 EXPORT_SYMBOL(gen_pool_virt_to_phys);
 
@@ -115,7 +234,6 @@ void gen_pool_destroy(struct gen_pool *pool)
         int order = pool->min_alloc_order;
         int bit, end_bit;
 
-
         list_for_each_safe(_chunk, _next_chunk, &pool->chunks) {
                 chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
                 list_del(&chunk->next_chunk);
@@ -137,44 +255,50 @@ EXPORT_SYMBOL(gen_pool_destroy);
  * @size: number of bytes to allocate from the pool
  *
  * Allocate the requested number of bytes from the specified pool.
- * Uses a first-fit algorithm.
+ * Uses a first-fit algorithm. Can not be used in NMI handler on
+ * architectures without NMI-safe cmpxchg implementation.
  */
 unsigned long gen_pool_alloc(struct gen_pool *pool, size_t size)
 {
-        struct list_head *_chunk;
         struct gen_pool_chunk *chunk;
-        unsigned long addr, flags;
+        unsigned long addr = 0;
         int order = pool->min_alloc_order;
-        int nbits, start_bit, end_bit;
+        int nbits, start_bit = 0, end_bit, remain;
+
+#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        BUG_ON(in_nmi());
+#endif
 
         if (size == 0)
                 return 0;
 
         nbits = (size + (1UL << order) - 1) >> order;
-
-        read_lock(&pool->lock);
-        list_for_each(_chunk, &pool->chunks) {
-                chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
+                if (size > atomic_read(&chunk->avail))
+                        continue;
 
                 end_bit = (chunk->end_addr - chunk->start_addr) >> order;
-
-                spin_lock_irqsave(&chunk->lock, flags);
-                start_bit = bitmap_find_next_zero_area(chunk->bits, end_bit, 0,
-                                                nbits, 0);
-                if (start_bit >= end_bit) {
-                        spin_unlock_irqrestore(&chunk->lock, flags);
+retry:
+                start_bit = bitmap_find_next_zero_area(chunk->bits, end_bit,
+                                                       start_bit, nbits, 0);
+                if (start_bit >= end_bit)
                         continue;
+                remain = bitmap_set_ll(chunk->bits, start_bit, nbits);
+                if (remain) {
+                        remain = bitmap_clear_ll(chunk->bits, start_bit,
+                                                 nbits - remain);
+                        BUG_ON(remain);
+                        goto retry;
                 }
 
                 addr = chunk->start_addr + ((unsigned long)start_bit << order);
-
-                bitmap_set(chunk->bits, start_bit, nbits);
-                spin_unlock_irqrestore(&chunk->lock, flags);
-                read_unlock(&pool->lock);
-                return addr;
+                size = nbits << order;
+                atomic_sub(size, &chunk->avail);
+                break;
         }
-        read_unlock(&pool->lock);
-        return 0;
+        rcu_read_unlock();
+        return addr;
 }
 EXPORT_SYMBOL(gen_pool_alloc);
 
@@ -184,33 +308,95 @@ EXPORT_SYMBOL(gen_pool_alloc);
  * @addr: starting address of memory to free back to pool
  * @size: size in bytes of memory to free
  *
- * Free previously allocated special memory back to the specified pool.
+ * Free previously allocated special memory back to the specified
+ * pool.  Can not be used in NMI handler on architectures without
+ * NMI-safe cmpxchg implementation.
  */
 void gen_pool_free(struct gen_pool *pool, unsigned long addr, size_t size)
 {
-        struct list_head *_chunk;
         struct gen_pool_chunk *chunk;
-        unsigned long flags;
         int order = pool->min_alloc_order;
-        int bit, nbits;
+        int start_bit, nbits, remain;
 
-        nbits = (size + (1UL << order) - 1) >> order;
-
-        read_lock(&pool->lock);
-        list_for_each(_chunk, &pool->chunks) {
-                chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
+#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        BUG_ON(in_nmi());
+#endif
 
+        nbits = (size + (1UL << order) - 1) >> order;
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
                 if (addr >= chunk->start_addr && addr < chunk->end_addr) {
                         BUG_ON(addr + size > chunk->end_addr);
-                        spin_lock_irqsave(&chunk->lock, flags);
-                        bit = (addr - chunk->start_addr) >> order;
-                        while (nbits--)
-                                __clear_bit(bit++, chunk->bits);
-                        spin_unlock_irqrestore(&chunk->lock, flags);
-                        break;
+                        start_bit = (addr - chunk->start_addr) >> order;
+                        remain = bitmap_clear_ll(chunk->bits, start_bit, nbits);
+                        BUG_ON(remain);
+                        size = nbits << order;
+                        atomic_add(size, &chunk->avail);
+                        rcu_read_unlock();
+                        return;
                 }
         }
-        BUG_ON(nbits > 0);
-        read_unlock(&pool->lock);
+        rcu_read_unlock();
+        BUG();
 }
 EXPORT_SYMBOL(gen_pool_free);
+
+/**
+ * gen_pool_for_each_chunk - call func for every chunk of generic memory pool
+ * @pool:       the generic memory pool
+ * @func:       func to call
+ * @data:       additional data used by @func
+ *
+ * Call @func for every chunk of generic memory pool.  The @func is
+ * called with rcu_read_lock held.
+ */
+void gen_pool_for_each_chunk(struct gen_pool *pool,
+        void (*func)(struct gen_pool *pool, struct gen_pool_chunk *chunk, void *data),
+        void *data)
+{
+        struct gen_pool_chunk *chunk;
+
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &(pool)->chunks, next_chunk)
+                func(pool, chunk, data);
+        rcu_read_unlock();
+}
+EXPORT_SYMBOL(gen_pool_for_each_chunk);
+
+/**
+ * gen_pool_avail - get available free space of the pool
+ * @pool: pool to get available free space
+ *
+ * Return available free space of the specified pool.
+ */
+size_t gen_pool_avail(struct gen_pool *pool)
+{
+        struct gen_pool_chunk *chunk;
+        size_t avail = 0;
+
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk)
+                avail += atomic_read(&chunk->avail);
+        rcu_read_unlock();
+        return avail;
+}
+EXPORT_SYMBOL_GPL(gen_pool_avail);
+
+/**
+ * gen_pool_size - get size in bytes of memory managed by the pool
+ * @pool: pool to get size
+ *
+ * Return size in bytes of memory managed by the pool.
+ */
+size_t gen_pool_size(struct gen_pool *pool)
+{
+        struct gen_pool_chunk *chunk;
+        size_t size = 0;
+
+        rcu_read_lock();
+        list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk)
+                size += chunk->end_addr - chunk->start_addr;
+        rcu_read_unlock();
+        return size;
+}
+EXPORT_SYMBOL_GPL(gen_pool_size);
diff --git a/lib/idr.c b/lib/idr.c
index e15502e8b21e..db040ce3fa73 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -34,8 +34,10 @@
 #include <linux/err.h>
 #include <linux/string.h>
 #include <linux/idr.h>
+#include <linux/spinlock.h>
 
 static struct kmem_cache *idr_layer_cache;
+static DEFINE_SPINLOCK(simple_ida_lock);
 
 static struct idr_layer *get_from_free_list(struct idr *idp)
 {
@@ -926,6 +928,71 @@ void ida_destroy(struct ida *ida)
 EXPORT_SYMBOL(ida_destroy);
 
 /**
+ * ida_simple_get - get a new id.
+ * @ida: the (initialized) ida.
+ * @start: the minimum id (inclusive, < 0x8000000)
+ * @end: the maximum id (exclusive, < 0x8000000 or 0)
+ * @gfp_mask: memory allocation flags
+ *
+ * Allocates an id in the range start <= id < end, or returns -ENOSPC.
+ * On memory allocation failure, returns -ENOMEM.
+ *
+ * Use ida_simple_remove() to get rid of an id.
+ */
+int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
+                   gfp_t gfp_mask)
+{
+        int ret, id;
+        unsigned int max;
+
+        BUG_ON((int)start < 0);
+        BUG_ON((int)end < 0);
+
+        if (end == 0)
+                max = 0x80000000;
+        else {
+                BUG_ON(end < start);
+                max = end - 1;
+        }
+
+again:
+        if (!ida_pre_get(ida, gfp_mask))
+                return -ENOMEM;
+
+        spin_lock(&simple_ida_lock);
+        ret = ida_get_new_above(ida, start, &id);
+        if (!ret) {
+                if (id > max) {
+                        ida_remove(ida, id);
+                        ret = -ENOSPC;
+                } else {
+                        ret = id;
+                }
+        }
+        spin_unlock(&simple_ida_lock);
+
+        if (unlikely(ret == -EAGAIN))
+                goto again;
+
+        return ret;
+}
+EXPORT_SYMBOL(ida_simple_get);
+
+/**
+ * ida_simple_remove - remove an allocated id.
+ * @ida: the (initialized) ida.
+ * @id: the id returned by ida_simple_get.
+ */
+void ida_simple_remove(struct ida *ida, unsigned int id)
+{
+        BUG_ON((int)id < 0);
+        spin_lock(&simple_ida_lock);
+        ida_remove(ida, id);
+        spin_unlock(&simple_ida_lock);
+}
+EXPORT_SYMBOL(ida_simple_remove);
+
+/**
  * ida_init - initialize ida handle
  * @ida:        ida handle
  *
diff --git a/lib/llist.c b/lib/llist.c
new file mode 100644
index 000000000000..da445724fa1f
--- /dev/null
+++ b/lib/llist.c
@@ -0,0 +1,129 @@
+/*
+ * Lock-less NULL terminated single linked list
+ *
+ * The basic atomic operation of this list is cmpxchg on long.  On
+ * architectures that don't have NMI-safe cmpxchg implementation, the
+ * list can NOT be used in NMI handler.  So code uses the list in NMI
+ * handler should depend on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.
+ *
+ * Copyright 2010,2011 Intel Corp.
+ *   Author: Huang Ying <ying.huang@intel.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/llist.h>
+
+#include <asm/system.h>
+
+/**
+ * llist_add - add a new entry
+ * @new:        new entry to be added
+ * @head:       the head for your lock-less list
+ */
+void llist_add(struct llist_node *new, struct llist_head *head)
+{
+        struct llist_node *entry, *old_entry;
+
+#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        BUG_ON(in_nmi());
+#endif
+
+        entry = head->first;
+        do {
+                old_entry = entry;
+                new->next = entry;
+                cpu_relax();
+        } while ((entry = cmpxchg(&head->first, old_entry, new)) != old_entry);
+}
+EXPORT_SYMBOL_GPL(llist_add);
+
+/**
+ * llist_add_batch - add several linked entries in batch
+ * @new_first:  first entry in batch to be added
+ * @new_last:   last entry in batch to be added
+ * @head:       the head for your lock-less list
+ */
+void llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
+                     struct llist_head *head)
+{
+        struct llist_node *entry, *old_entry;
+
+#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        BUG_ON(in_nmi());
+#endif
+
+        entry = head->first;
+        do {
+                old_entry = entry;
+                new_last->next = entry;
+                cpu_relax();
+        } while ((entry = cmpxchg(&head->first, old_entry, new_first)) != old_entry);
+}
+EXPORT_SYMBOL_GPL(llist_add_batch);
+
+/**
+ * llist_del_first - delete the first entry of lock-less list
+ * @head:       the head for your lock-less list
+ *
+ * If list is empty, return NULL, otherwise, return the first entry
+ * deleted, this is the newest added one.
+ *
+ * Only one llist_del_first user can be used simultaneously with
+ * multiple llist_add users without lock.  Because otherwise
+ * llist_del_first, llist_add, llist_add (or llist_del_all, llist_add,
+ * llist_add) sequence in another user may change @head->first->next,
+ * but keep @head->first.  If multiple consumers are needed, please
+ * use llist_del_all or use lock between consumers.
+ */
+struct llist_node *llist_del_first(struct llist_head *head)
+{
+        struct llist_node *entry, *old_entry, *next;
+
+#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        BUG_ON(in_nmi());
+#endif
+
+        entry = head->first;
+        do {
+                if (entry == NULL)
+                        return NULL;
+                old_entry = entry;
+                next = entry->next;
+                cpu_relax();
+        } while ((entry = cmpxchg(&head->first, old_entry, next)) != old_entry);
+
+        return entry;
+}
+EXPORT_SYMBOL_GPL(llist_del_first);
+
+/**
+ * llist_del_all - delete all entries from lock-less list
+ * @head:       the head of lock-less list to delete all entries
+ *
+ * If list is empty, return NULL, otherwise, delete all entries and
+ * return the pointer to the first entry.  The order of entries
+ * deleted is from the newest to the oldest added one.
+ */
+struct llist_node *llist_del_all(struct llist_head *head)
+{
+#ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
+        BUG_ON(in_nmi());
+#endif
+
+        return xchg(&head->first, NULL);
+}
+EXPORT_SYMBOL_GPL(llist_del_all);
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 7ea2e033d715..a2f9da59c197 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -823,8 +823,8 @@ unsigned long radix_tree_prev_hole(struct radix_tree_root *root,
 EXPORT_SYMBOL(radix_tree_prev_hole);
 
 static unsigned int
-__lookup(struct radix_tree_node *slot, void ***results, unsigned long index,
-        unsigned int max_items, unsigned long *next_index)
+__lookup(struct radix_tree_node *slot, void ***results, unsigned long *indices,
+        unsigned long index, unsigned int max_items, unsigned long *next_index)
 {
         unsigned int nr_found = 0;
         unsigned int shift, height;
@@ -857,12 +857,16 @@ __lookup(struct radix_tree_node *slot, void ***results, unsigned long index,
 
         /* Bottom level: grab some items */
         for (i = index & RADIX_TREE_MAP_MASK; i < RADIX_TREE_MAP_SIZE; i++) {
-                index++;
                 if (slot->slots[i]) {
-                        results[nr_found++] = &(slot->slots[i]);
-                        if (nr_found == max_items)
+                        results[nr_found] = &(slot->slots[i]);
+                        if (indices)
+                                indices[nr_found] = index;
+                        if (++nr_found == max_items) {
+                                index++;
                                 goto out;
+                        }
                 }
+                index++;
         }
 out:
         *next_index = index;
@@ -918,8 +922,8 @@ radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
 
                 if (cur_index > max_index)
                         break;
-                slots_found = __lookup(node, (void ***)results + ret, cur_index,
-                                        max_items - ret, &next_index);
+                slots_found = __lookup(node, (void ***)results + ret, NULL,
+                                cur_index, max_items - ret, &next_index);
                 nr_found = 0;
                 for (i = 0; i < slots_found; i++) {
                         struct radix_tree_node *slot;
@@ -944,6 +948,7 @@ EXPORT_SYMBOL(radix_tree_gang_lookup);
  *      radix_tree_gang_lookup_slot - perform multiple slot lookup on radix tree
  *      @root:          radix tree root
  *      @results:       where the results of the lookup are placed
+ *      @indices:       where their indices should be placed (but usually NULL)
  *      @first_index:   start the lookup from this key
  *      @max_items:     place up to this many items at *results
  *
@@ -958,7 +963,8 @@ EXPORT_SYMBOL(radix_tree_gang_lookup);
  *      protection, radix_tree_deref_slot may fail requiring a retry.
  */
 unsigned int
-radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results,
+radix_tree_gang_lookup_slot(struct radix_tree_root *root,
+                        void ***results, unsigned long *indices,
                         unsigned long first_index, unsigned int max_items)
 {
         unsigned long max_index;
@@ -974,6 +980,8 @@ radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results,
                 if (first_index > 0)
                         return 0;
                 results[0] = (void **)&root->rnode;
+                if (indices)
+                        indices[0] = 0;
                 return 1;
         }
         node = indirect_to_ptr(node);
@@ -987,8 +995,9 @@ radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results,
 
                 if (cur_index > max_index)
                         break;
-                slots_found = __lookup(node, results + ret, cur_index,
-                                        max_items - ret, &next_index);
+                slots_found = __lookup(node, results + ret,
+                                indices ? indices + ret : NULL,
+                                cur_index, max_items - ret, &next_index);
                 ret += slots_found;
                 if (next_index == 0)
                         break;
@@ -1194,6 +1203,98 @@ radix_tree_gang_lookup_tag_slot(struct radix_tree_root *root, void ***results,
 }
 EXPORT_SYMBOL(radix_tree_gang_lookup_tag_slot);
 
+#if defined(CONFIG_SHMEM) && defined(CONFIG_SWAP)
+#include <linux/sched.h> /* for cond_resched() */
+
+/*
+ * This linear search is at present only useful to shmem_unuse_inode().
+ */
+static unsigned long __locate(struct radix_tree_node *slot, void *item,
+                              unsigned long index, unsigned long *found_index)
+{
+        unsigned int shift, height;
+        unsigned long i;
+
+        height = slot->height;
+        shift = (height-1) * RADIX_TREE_MAP_SHIFT;
+
+        for ( ; height > 1; height--) {
+                i = (index >> shift) & RADIX_TREE_MAP_MASK;
+                for (;;) {
+                        if (slot->slots[i] != NULL)
+                                break;
+                        index &= ~((1UL << shift) - 1);
+                        index += 1UL << shift;
+                        if (index == 0)
+                                goto out;       /* 32-bit wraparound */
+                        i++;
+                        if (i == RADIX_TREE_MAP_SIZE)
+                                goto out;
+                }
+
+                shift -= RADIX_TREE_MAP_SHIFT;
+                slot = rcu_dereference_raw(slot->slots[i]);
+                if (slot == NULL)
+                        goto out;
+        }
+
+        /* Bottom level: check items */
+        for (i = 0; i < RADIX_TREE_MAP_SIZE; i++) {
+                if (slot->slots[i] == item) {
+                        *found_index = index + i;
+                        index = 0;
+                        goto out;
+                }
+        }
+        index += RADIX_TREE_MAP_SIZE;
+out:
+        return index;
+}
+
+/**
+ *      radix_tree_locate_item - search through radix tree for item
+ *      @root:          radix tree root
+ *      @item:          item to be found
+ *
+ *      Returns index where item was found, or -1 if not found.
+ *      Caller must hold no lock (since this time-consuming function needs
+ *      to be preemptible), and must check afterwards if item is still there.
+ */
+unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item)
+{
+        struct radix_tree_node *node;
+        unsigned long max_index;
+        unsigned long cur_index = 0;
+        unsigned long found_index = -1;
+
+        do {
+                rcu_read_lock();
+                node = rcu_dereference_raw(root->rnode);
+                if (!radix_tree_is_indirect_ptr(node)) {
+                        rcu_read_unlock();
+                        if (node == item)
+                                found_index = 0;
+                        break;
+                }
+
+                node = indirect_to_ptr(node);
+                max_index = radix_tree_maxindex(node->height);
+                if (cur_index > max_index)
+                        break;
+
+                cur_index = __locate(node, item, cur_index, &found_index);
+                rcu_read_unlock();
+                cond_resched();
+        } while (cur_index != 0 && cur_index <= max_index);
+
+        return found_index;
+}
+#else
+unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item)
+{
+        return -1;
+}
+#endif /* CONFIG_SHMEM && CONFIG_SWAP */
 
 /**
  *      radix_tree_shrink    -    shrink height of a radix tree to minimal
diff --git a/mm/failslab.c b/mm/failslab.c
index 1ce58c201dca..0dd7b8fec71c 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -34,23 +34,23 @@ __setup("failslab=", setup_failslab);
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 static int __init failslab_debugfs_init(void)
 {
+        struct dentry *dir;
         mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
-        int err;
 
-        err = init_fault_attr_dentries(&failslab.attr, "failslab");
-        if (err)
-                return err;
+        dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
+        if (IS_ERR(dir))
+                return PTR_ERR(dir);
 
-        if (!debugfs_create_bool("ignore-gfp-wait", mode, failslab.attr.dir,
+        if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
                                 &failslab.ignore_gfp_wait))
                 goto fail;
-        if (!debugfs_create_bool("cache-filter", mode, failslab.attr.dir,
+        if (!debugfs_create_bool("cache-filter", mode, dir,
                                 &failslab.cache_filter))
                 goto fail;
 
         return 0;
 fail:
-        cleanup_fault_attr_dentries(&failslab.attr);
+        debugfs_remove_recursive(dir);
 
         return -ENOMEM;
 }
diff --git a/mm/filemap.c b/mm/filemap.c
index 867d40222ec7..645a080ba4df 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -33,7 +33,6 @@
 #include <linux/cpuset.h>
 #include <linux/hardirq.h> /* for BUG_ON(!in_atomic()) only */
 #include <linux/memcontrol.h>
-#include <linux/mm_inline.h> /* for page_is_file_cache() */
 #include <linux/cleancache.h>
 #include "internal.h"
 
@@ -462,6 +461,7 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
         int error;
 
         VM_BUG_ON(!PageLocked(page));
+        VM_BUG_ON(PageSwapBacked(page));
 
         error = mem_cgroup_cache_charge(page, current->mm,
                                         gfp_mask & GFP_RECLAIM_MASK);
@@ -479,8 +479,6 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
                 if (likely(!error)) {
                         mapping->nrpages++;
                         __inc_zone_page_state(page, NR_FILE_PAGES);
-                        if (PageSwapBacked(page))
-                                __inc_zone_page_state(page, NR_SHMEM);
                         spin_unlock_irq(&mapping->tree_lock);
                 } else {
                         page->mapping = NULL;
@@ -502,22 +500,9 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
 {
         int ret;
 
-        /*
-         * Splice_read and readahead add shmem/tmpfs pages into the page cache
-         * before shmem_readpage has a chance to mark them as SwapBacked: they
-         * need to go on the anon lru below, and mem_cgroup_cache_charge
-         * (called in add_to_page_cache) needs to know where they're going too.
-         */
-        if (mapping_cap_swap_backed(mapping))
-                SetPageSwapBacked(page);
-
         ret = add_to_page_cache(page, mapping, offset, gfp_mask);
-        if (ret == 0) {
-                if (page_is_file_cache(page))
-                        lru_cache_add_file(page);
-                else
-                        lru_cache_add_anon(page);
-        }
+        if (ret == 0)
+                lru_cache_add_file(page);
         return ret;
 }
 EXPORT_SYMBOL_GPL(add_to_page_cache_lru);
@@ -714,9 +699,16 @@ repeat:
                 page = radix_tree_deref_slot(pagep);
                 if (unlikely(!page))
                         goto out;
-                if (radix_tree_deref_retry(page))
-                        goto repeat;
-
+                if (radix_tree_exception(page)) {
+                        if (radix_tree_deref_retry(page))
+                                goto repeat;
+                        /*
+                         * Otherwise, shmem/tmpfs must be storing a swap entry
+                         * here as an exceptional entry: so return it without
+                         * attempting to raise page count.
+                         */
+                        goto out;
+                }
                 if (!page_cache_get_speculative(page))
                         goto repeat;
 
@@ -753,7 +745,7 @@ struct page *find_lock_page(struct address_space *mapping, pgoff_t offset)
 
 repeat:
         page = find_get_page(mapping, offset);
-        if (page) {
+        if (page && !radix_tree_exception(page)) {
                 lock_page(page);
                 /* Has the page been truncated? */
                 if (unlikely(page->mapping != mapping)) {
@@ -840,7 +832,7 @@ unsigned find_get_pages(struct address_space *mapping, pgoff_t start,
         rcu_read_lock();
 restart:
         nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
-                                (void ***)pages, start, nr_pages);
+                                (void ***)pages, NULL, start, nr_pages);
         ret = 0;
         for (i = 0; i < nr_found; i++) {
                 struct page *page;
@@ -849,13 +841,22 @@ repeat:
                 if (unlikely(!page))
                         continue;
 
-                /*
-                 * This can only trigger when the entry at index 0 moves out
-                 * of or back to the root: none yet gotten, safe to restart.
-                 */
-                if (radix_tree_deref_retry(page)) {
-                        WARN_ON(start | i);
-                        goto restart;
+                if (radix_tree_exception(page)) {
+                        if (radix_tree_deref_retry(page)) {
+                                /*
+                                 * Transient condition which can only trigger
+                                 * when entry at index 0 moves out of or back
+                                 * to root: none yet gotten, safe to restart.
+                                 */
+                                WARN_ON(start | i);
+                                goto restart;
+                        }
+                        /*
+                         * Otherwise, shmem/tmpfs must be storing a swap entry
+                         * here as an exceptional entry: so skip over it -
+                         * we only reach this from invalidate_mapping_pages().
+                         */
+                        continue;
                 }
 
                 if (!page_cache_get_speculative(page))
@@ -903,7 +904,7 @@ unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t index,
         rcu_read_lock();
 restart:
         nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
-                                (void ***)pages, index, nr_pages);
+                                (void ***)pages, NULL, index, nr_pages);
         ret = 0;
         for (i = 0; i < nr_found; i++) {
                 struct page *page;
@@ -912,12 +913,22 @@ repeat:
                 if (unlikely(!page))
                         continue;
 
-                /*
-                 * This can only trigger when the entry at index 0 moves out
-                 * of or back to the root: none yet gotten, safe to restart.
-                 */
-                if (radix_tree_deref_retry(page))
-                        goto restart;
+                if (radix_tree_exception(page)) {
+                        if (radix_tree_deref_retry(page)) {
+                                /*
+                                 * Transient condition which can only trigger
+                                 * when entry at index 0 moves out of or back
+                                 * to root: none yet gotten, safe to restart.
+                                 */
+                                goto restart;
+                        }
+                        /*
+                         * Otherwise, shmem/tmpfs must be storing a swap entry
+                         * here as an exceptional entry: so stop looking for
+                         * contiguous pages.
+                         */
+                        break;
+                }
 
                 if (!page_cache_get_speculative(page))
                         goto repeat;
@@ -977,12 +988,21 @@ repeat:
                 if (unlikely(!page))
                         continue;
 
-                /*
-                 * This can only trigger when the entry at index 0 moves out
-                 * of or back to the root: none yet gotten, safe to restart.
-                 */
-                if (radix_tree_deref_retry(page))
-                        goto restart;
+                if (radix_tree_exception(page)) {
+                        if (radix_tree_deref_retry(page)) {
+                                /*
+                                 * Transient condition which can only trigger
+                                 * when entry at index 0 moves out of or back
+                                 * to root: none yet gotten, safe to restart.
+                                 */
+                                goto restart;
+                        }
+                        /*
+                         * This function is never used on a shmem/tmpfs
+                         * mapping, so a swap entry won't be found here.
+                         */
+                        BUG();
+                }
 
                 if (!page_cache_get_speculative(page))
                         goto repeat;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5f84d2351ddb..f4ec4e7ca4cd 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -35,7 +35,6 @@
 #include <linux/limits.h>
 #include <linux/mutex.h>
 #include <linux/rbtree.h>
-#include <linux/shmem_fs.h>
 #include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>
@@ -2873,30 +2872,6 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
                 return 0;
         if (PageCompound(page))
                 return 0;
-        /*
-         * Corner case handling. This is called from add_to_page_cache()
-         * in usual. But some FS (shmem) precharges this page before calling it
-         * and call add_to_page_cache() with GFP_NOWAIT.
-         *
-         * For GFP_NOWAIT case, the page may be pre-charged before calling
-         * add_to_page_cache(). (See shmem.c) check it here and avoid to call
-         * charge twice. (It works but has to pay a bit larger cost.)
-         * And when the page is SwapCache, it should take swap information
-         * into account. This is under lock_page() now.
-         */
-        if (!(gfp_mask & __GFP_WAIT)) {
-                struct page_cgroup *pc;
-
-                pc = lookup_page_cgroup(page);
-                if (!pc)
-                        return 0;
-                lock_page_cgroup(pc);
-                if (PageCgroupUsed(pc)) {
-                        unlock_page_cgroup(pc);
-                        return 0;
-                }
-                unlock_page_cgroup(pc);
-        }
 
         if (unlikely(!mm))
                 mm = &init_mm;
@@ -3486,31 +3461,6 @@ void mem_cgroup_end_migration(struct mem_cgroup *mem,
         cgroup_release_and_wakeup_rmdir(&mem->css);
 }
 
-/*
- * A call to try to shrink memory usage on charge failure at shmem's swapin.
- * Calling hierarchical_reclaim is not enough because we should update
- * last_oom_jiffies to prevent pagefault_out_of_memory from invoking global OOM.
- * Moreover considering hierarchy, we should reclaim from the mem_over_limit,
- * not from the memcg which this page would be charged to.
- * try_charge_swapin does all of these works properly.
- */
-int mem_cgroup_shmem_charge_fallback(struct page *page,
-                            struct mm_struct *mm,
-                            gfp_t gfp_mask)
-{
-        struct mem_cgroup *mem;
-        int ret;
-
-        if (mem_cgroup_disabled())
-                return 0;
-
-        ret = mem_cgroup_try_charge_swapin(mm, page, gfp_mask, &mem);
-        if (!ret)
-                mem_cgroup_cancel_charge_swapin(mem); /* it does !mem check */
-
-        return ret;
-}
-
 #ifdef CONFIG_DEBUG_VM
 static struct page_cgroup *lookup_page_cgroup_used(struct page *page)
 {
@@ -5330,15 +5280,17 @@ static struct page *mc_handle_file_pte(struct vm_area_struct *vma,
                 pgoff = pte_to_pgoff(ptent);
 
         /* page is moved even if it's not RSS of this task(page-faulted). */
-        if (!mapping_cap_swap_backed(mapping)) { /* normal file */
-                page = find_get_page(mapping, pgoff);
-        } else { /* shmem/tmpfs file. we should take account of swap too. */
-                swp_entry_t ent;
-                mem_cgroup_get_shmem_target(inode, pgoff, &page, &ent);
+        page = find_get_page(mapping, pgoff);
+
+#ifdef CONFIG_SWAP
+        /* shmem/tmpfs may report page out on swap: account for that too. */
+        if (radix_tree_exceptional_entry(page)) {
+                swp_entry_t swap = radix_to_swp_entry(page);
                 if (do_swap_account)
-                        entry->val = ent.val;
+                        *entry = swap;
+                page = find_get_page(&swapper_space, swap.val);
         }
-
+#endif
         return page;
 }
 
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 740c4f52059c..2b43ba051ac9 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -53,6 +53,7 @@
 #include <linux/hugetlb.h>
 #include <linux/memory_hotplug.h>
 #include <linux/mm_inline.h>
+#include <linux/kfifo.h>
 #include "internal.h"
 
 int sysctl_memory_failure_early_kill __read_mostly = 0;
@@ -1178,6 +1179,97 @@ void memory_failure(unsigned long pfn, int trapno)
         __memory_failure(pfn, trapno, 0);
 }
 
+#define MEMORY_FAILURE_FIFO_ORDER       4
+#define MEMORY_FAILURE_FIFO_SIZE        (1 << MEMORY_FAILURE_FIFO_ORDER)
+
+struct memory_failure_entry {
+        unsigned long pfn;
+        int trapno;
+        int flags;
+};
+
+struct memory_failure_cpu {
+        DECLARE_KFIFO(fifo, struct memory_failure_entry,
+                      MEMORY_FAILURE_FIFO_SIZE);
+        spinlock_t lock;
+        struct work_struct work;
+};
+
+static DEFINE_PER_CPU(struct memory_failure_cpu, memory_failure_cpu);
+
+/**
+ * memory_failure_queue - Schedule handling memory failure of a page.
+ * @pfn: Page Number of the corrupted page
+ * @trapno: Trap number reported in the signal to user space.
+ * @flags: Flags for memory failure handling
+ *
+ * This function is called by the low level hardware error handler
+ * when it detects hardware memory corruption of a page. It schedules
+ * the recovering of error page, including dropping pages, killing
+ * processes etc.
+ *
+ * The function is primarily of use for corruptions that
+ * happen outside the current execution context (e.g. when
+ * detected by a background scrubber)
+ *
+ * Can run in IRQ context.
+ */
+void memory_failure_queue(unsigned long pfn, int trapno, int flags)
+{
+        struct memory_failure_cpu *mf_cpu;
+        unsigned long proc_flags;
+        struct memory_failure_entry entry = {
+                .pfn =          pfn,
+                .trapno =       trapno,
+                .flags =        flags,
+        };
+
+        mf_cpu = &get_cpu_var(memory_failure_cpu);
+        spin_lock_irqsave(&mf_cpu->lock, proc_flags);
+        if (kfifo_put(&mf_cpu->fifo, &entry))
+                schedule_work_on(smp_processor_id(), &mf_cpu->work);
+        else
+                pr_err("Memory failure: buffer overflow when queuing memory failure at 0x%#lx\n",
+                       pfn);
+        spin_unlock_irqrestore(&mf_cpu->lock, proc_flags);
+        put_cpu_var(memory_failure_cpu);
+}
+EXPORT_SYMBOL_GPL(memory_failure_queue);
+
+static void memory_failure_work_func(struct work_struct *work)
+{
+        struct memory_failure_cpu *mf_cpu;
+        struct memory_failure_entry entry = { 0, };
+        unsigned long proc_flags;
+        int gotten;
+
+        mf_cpu = &__get_cpu_var(memory_failure_cpu);
+        for (;;) {
+                spin_lock_irqsave(&mf_cpu->lock, proc_flags);
+                gotten = kfifo_get(&mf_cpu->fifo, &entry);
+                spin_unlock_irqrestore(&mf_cpu->lock, proc_flags);
+                if (!gotten)
+                        break;
+                __memory_failure(entry.pfn, entry.trapno, entry.flags);
+        }
+}
+
+static int __init memory_failure_init(void)
+{
+        struct memory_failure_cpu *mf_cpu;
+        int cpu;
+
+        for_each_possible_cpu(cpu) {
+                mf_cpu = &per_cpu(memory_failure_cpu, cpu);
+                spin_lock_init(&mf_cpu->lock);
+                INIT_KFIFO(mf_cpu->fifo);
+                INIT_WORK(&mf_cpu->work, memory_failure_work_func);
+        }
+
+        return 0;
+}
+core_initcall(memory_failure_init);
+
 /**
  * unpoison_memory - Unpoison a previously poisoned page
  * @pfn: Page number of the to be unpoisoned page
diff --git a/mm/mincore.c b/mm/mincore.c
index a4e6b9d75c76..636a86876ff2 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -69,12 +69,15 @@ static unsigned char mincore_page(struct address_space *mapping, pgoff_t pgoff)
          * file will not get a swp_entry_t in its pte, but rather it is like
          * any other file mapping (ie. marked !present and faulted in with
          * tmpfs's .fault). So swapped out tmpfs mappings are tested here.
-         *
-         * However when tmpfs moves the page from pagecache and into swapcache,
-         * it is still in core, but the find_get_page below won't find it.
-         * No big deal, but make a note of it.
          */
         page = find_get_page(mapping, pgoff);
+#ifdef CONFIG_SWAP
+        /* shmem/tmpfs may return swap: account for swapcache page too. */
+        if (radix_tree_exceptional_entry(page)) {
+                swp_entry_t swap = radix_to_swp_entry(page);
+                page = find_get_page(&swapper_space, swap.val);
+        }
+#endif
         if (page) {
                 present = PageUptodate(page);
                 page_cache_release(page);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1dbcf8888f14..6e8ecb6e021c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1409,14 +1409,11 @@ static int __init fail_page_alloc_debugfs(void)
 {
         mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
         struct dentry *dir;
-        int err;
 
-        err = init_fault_attr_dentries(&fail_page_alloc.attr,
-                                       "fail_page_alloc");
-        if (err)
-                return err;
-
-        dir = fail_page_alloc.attr.dir;
+        dir = fault_create_debugfs_attr("fail_page_alloc", NULL,
+                                        &fail_page_alloc.attr);
+        if (IS_ERR(dir))
+                return PTR_ERR(dir);
 
         if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
                                 &fail_page_alloc.ignore_gfp_wait))
@@ -1430,7 +1427,7 @@ static int __init fail_page_alloc_debugfs(void)
 
         return 0;
 fail:
-        cleanup_fault_attr_dentries(&fail_page_alloc.attr);
+        debugfs_remove_recursive(dir);
 
         return -ENOMEM;
 }
diff --git a/mm/shmem.c b/mm/shmem.c
index 5cc21f8b4cd3..32f6763f16fb 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -6,7 +6,8 @@
  *               2000-2001 Christoph Rohland
  *               2000-2001 SAP AG
  *               2002 Red Hat Inc.
- * Copyright (C) 2002-2005 Hugh Dickins.
+ * Copyright (C) 2002-2011 Hugh Dickins.
+ * Copyright (C) 2011 Google Inc.
  * Copyright (C) 2002-2005 VERITAS Software Corporation.
  * Copyright (C) 2004 Andi Kleen, SuSE Labs
  *
@@ -28,7 +29,6 @@
 #include <linux/file.h>
 #include <linux/mm.h>
 #include <linux/module.h>
-#include <linux/percpu_counter.h>
 #include <linux/swap.h>
 
 static struct vfsmount *shm_mnt;
@@ -51,6 +51,8 @@ static struct vfsmount *shm_mnt;
 #include <linux/shmem_fs.h>
 #include <linux/writeback.h>
 #include <linux/blkdev.h>
+#include <linux/pagevec.h>
+#include <linux/percpu_counter.h>
 #include <linux/splice.h>
 #include <linux/security.h>
 #include <linux/swapops.h>
@@ -63,43 +65,17 @@ static struct vfsmount *shm_mnt;
 #include <linux/magic.h>
 
 #include <asm/uaccess.h>
-#include <asm/div64.h>
 #include <asm/pgtable.h>
 
-/*
- * The maximum size of a shmem/tmpfs file is limited by the maximum size of
- * its triple-indirect swap vector - see illustration at shmem_swp_entry().
- *
- * With 4kB page size, maximum file size is just over 2TB on a 32-bit kernel,
- * but one eighth of that on a 64-bit kernel.  With 8kB page size, maximum
- * file size is just over 4TB on a 64-bit kernel, but 16TB on a 32-bit kernel,
- * MAX_LFS_FILESIZE being then more restrictive than swap vector layout.
- *
- * We use / and * instead of shifts in the definitions below, so that the swap
- * vector can be tested with small even values (e.g. 20) for ENTRIES_PER_PAGE.
- */
-#define ENTRIES_PER_PAGE (PAGE_CACHE_SIZE/sizeof(unsigned long))
-#define ENTRIES_PER_PAGEPAGE ((unsigned long long)ENTRIES_PER_PAGE*ENTRIES_PER_PAGE)
-
-#define SHMSWP_MAX_INDEX (SHMEM_NR_DIRECT + (ENTRIES_PER_PAGEPAGE/2) * (ENTRIES_PER_PAGE+1))
-#define SHMSWP_MAX_BYTES (SHMSWP_MAX_INDEX << PAGE_CACHE_SHIFT)
-
-#define SHMEM_MAX_BYTES  min_t(unsigned long long, SHMSWP_MAX_BYTES, MAX_LFS_FILESIZE)
-#define SHMEM_MAX_INDEX  ((unsigned long)((SHMEM_MAX_BYTES+1) >> PAGE_CACHE_SHIFT))
-
 #define BLOCKS_PER_PAGE  (PAGE_CACHE_SIZE/512)
 #define VM_ACCT(size)    (PAGE_CACHE_ALIGN(size) >> PAGE_SHIFT)
 
-/* info->flags needs VM_flags to handle pagein/truncate races efficiently */
-#define SHMEM_PAGEIN     VM_READ
-#define SHMEM_TRUNCATE   VM_WRITE
-
-/* Definition to limit shmem_truncate's steps between cond_rescheds */
-#define LATENCY_LIMIT    64
-
 /* Pretend that each entry is of this size in directory's i_size */
 #define BOGO_DIRENT_SIZE 20
 
+/* Symlink up to this size is kmalloc'ed instead of using a swappable page */
+#define SHORT_SYMLINK_LEN 128
+
 struct shmem_xattr {
         struct list_head list;  /* anchored by shmem_inode_info->xattr_list */
         char *name;             /* xattr name */
@@ -107,7 +83,7 @@ struct shmem_xattr {
         char value[0];
 };
 
-/* Flag allocation requirements to shmem_getpage and shmem_swp_alloc */
+/* Flag allocation requirements to shmem_getpage */
 enum sgp_type {
         SGP_READ,       /* don't exceed i_size, don't allocate page */
         SGP_CACHE,      /* don't exceed i_size, may allocate page */
@@ -137,56 +113,6 @@ static inline int shmem_getpage(struct inode *inode, pgoff_t index,
                         mapping_gfp_mask(inode->i_mapping), fault_type);
 }
 
-static inline struct page *shmem_dir_alloc(gfp_t gfp_mask)
-{
-        /*
-         * The above definition of ENTRIES_PER_PAGE, and the use of
-         * BLOCKS_PER_PAGE on indirect pages, assume PAGE_CACHE_SIZE:
-         * might be reconsidered if it ever diverges from PAGE_SIZE.
-         *
-         * Mobility flags are masked out as swap vectors cannot move
-         */
-        return alloc_pages((gfp_mask & ~GFP_MOVABLE_MASK) | __GFP_ZERO,
-                                PAGE_CACHE_SHIFT-PAGE_SHIFT);
-}
-
-static inline void shmem_dir_free(struct page *page)
-{
-        __free_pages(page, PAGE_CACHE_SHIFT-PAGE_SHIFT);
-}
-
-static struct page **shmem_dir_map(struct page *page)
-{
-        return (struct page **)kmap_atomic(page, KM_USER0);
-}
-
-static inline void shmem_dir_unmap(struct page **dir)
-{
-        kunmap_atomic(dir, KM_USER0);
-}
-
-static swp_entry_t *shmem_swp_map(struct page *page)
-{
-        return (swp_entry_t *)kmap_atomic(page, KM_USER1);
-}
-
-static inline void shmem_swp_balance_unmap(void)
-{
-        /*
-         * When passing a pointer to an i_direct entry, to code which
-         * also handles indirect entries and so will shmem_swp_unmap,
-         * we must arrange for the preempt count to remain in balance.
-         * What kmap_atomic of a lowmem page does depends on config
-         * and architecture, so pretend to kmap_atomic some lowmem page.
-         */
-        (void) kmap_atomic(ZERO_PAGE(0), KM_USER1);
-}
-
-static inline void shmem_swp_unmap(swp_entry_t *entry)
-{
-        kunmap_atomic(entry, KM_USER1);
-}
-
 static inline struct shmem_sb_info *SHMEM_SB(struct super_block *sb)
 {
         return sb->s_fs_info;
@@ -244,15 +170,6 @@ static struct backing_dev_info shmem_backing_dev_info  __read_mostly = {
 static LIST_HEAD(shmem_swaplist);
 static DEFINE_MUTEX(shmem_swaplist_mutex);
 
-static void shmem_free_blocks(struct inode *inode, long pages)
-{
-        struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
-        if (sbinfo->max_blocks) {
-                percpu_counter_add(&sbinfo->used_blocks, -pages);
-                inode->i_blocks -= pages*BLOCKS_PER_PAGE;
-        }
-}
-
 static int shmem_reserve_inode(struct super_block *sb)
 {
         struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
@@ -279,7 +196,7 @@ static void shmem_free_inode(struct super_block *sb)
 }
 
 /**
- * shmem_recalc_inode - recalculate the size of an inode
+ * shmem_recalc_inode - recalculate the block usage of an inode
  * @inode: inode to recalc
  *
  * We have to calculate the free blocks since the mm can drop
@@ -297,474 +214,297 @@ static void shmem_recalc_inode(struct inode *inode)
 
         freed = info->alloced - info->swapped - inode->i_mapping->nrpages;
         if (freed > 0) {
+                struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
+                if (sbinfo->max_blocks)
+                        percpu_counter_add(&sbinfo->used_blocks, -freed);
                 info->alloced -= freed;
+                inode->i_blocks -= freed * BLOCKS_PER_PAGE;
                 shmem_unacct_blocks(info->flags, freed);
-                shmem_free_blocks(inode, freed);
         }
 }
 
-/**
- * shmem_swp_entry - find the swap vector position in the info structure
- * @info:  info structure for the inode
- * @index: index of the page to find
- * @page:  optional page to add to the structure. Has to be preset to
- *         all zeros
- *
- * If there is no space allocated yet it will return NULL when
- * page is NULL, else it will use the page for the needed block,
- * setting it to NULL on return to indicate that it has been used.
- *
- * The swap vector is organized the following way:
- *
- * There are SHMEM_NR_DIRECT entries directly stored in the
- * shmem_inode_info structure. So small files do not need an addional
- * allocation.
- *
- * For pages with index > SHMEM_NR_DIRECT there is the pointer
- * i_indirect which points to a page which holds in the first half
- * doubly indirect blocks, in the second half triple indirect blocks:
- *
- * For an artificial ENTRIES_PER_PAGE = 4 this would lead to the
- * following layout (for SHMEM_NR_DIRECT == 16):
- *
- * i_indirect -> dir --> 16-19
- *            |      +-> 20-23
- *            |
- *            +-->dir2 --> 24-27
- *            |        +-> 28-31
- *            |        +-> 32-35
- *            |        +-> 36-39
- *            |
- *            +-->dir3 --> 40-43
- *                     +-> 44-47
- *                     +-> 48-51
- *                     +-> 52-55
+/*
+ * Replace item expected in radix tree by a new item, while holding tree lock.
  */
-static swp_entry_t *shmem_swp_entry(struct shmem_inode_info *info, unsigned long index, struct page **page)
-{
-        unsigned long offset;
-        struct page **dir;
-        struct page *subdir;
-
-        if (index < SHMEM_NR_DIRECT) {
-                shmem_swp_balance_unmap();
-                return info->i_direct+index;
-        }
-        if (!info->i_indirect) {
-                if (page) {
-                        info->i_indirect = *page;
-                        *page = NULL;
-                }
-                return NULL;                    /* need another page */
-        }
-
-        index -= SHMEM_NR_DIRECT;
-        offset = index % ENTRIES_PER_PAGE;
-        index /= ENTRIES_PER_PAGE;
-        dir = shmem_dir_map(info->i_indirect);
-
-        if (index >= ENTRIES_PER_PAGE/2) {
-                index -= ENTRIES_PER_PAGE/2;
-                dir += ENTRIES_PER_PAGE/2 + index/ENTRIES_PER_PAGE;
-                index %= ENTRIES_PER_PAGE;
-                subdir = *dir;
-                if (!subdir) {
-                        if (page) {
-                                *dir = *page;
-                                *page = NULL;
-                        }
-                        shmem_dir_unmap(dir);
-                        return NULL;            /* need another page */
-                }
-                shmem_dir_unmap(dir);
-                dir = shmem_dir_map(subdir);
-        }
+static int shmem_radix_tree_replace(struct address_space *mapping,
+                        pgoff_t index, void *expected, void *replacement)
+{
+        void **pslot;
+        void *item = NULL;
+
+        VM_BUG_ON(!expected);
+        pslot = radix_tree_lookup_slot(&mapping->page_tree, index);
+        if (pslot)
+                item = radix_tree_deref_slot_protected(pslot,
+                                                        &mapping->tree_lock);
+        if (item != expected)
+                return -ENOENT;
+        if (replacement)
+                radix_tree_replace_slot(pslot, replacement);
+        else
+                radix_tree_delete(&mapping->page_tree, index);
+        return 0;
+}
 
-        dir += index;
-        subdir = *dir;
-        if (!subdir) {
-                if (!page || !(subdir = *page)) {
-                        shmem_dir_unmap(dir);
-                        return NULL;            /* need a page */
+/*
+ * Like add_to_page_cache_locked, but error if expected item has gone.
+ */
+static int shmem_add_to_page_cache(struct page *page,
+                                   struct address_space *mapping,
+                                   pgoff_t index, gfp_t gfp, void *expected)
+{
+        int error = 0;
+
+        VM_BUG_ON(!PageLocked(page));
+        VM_BUG_ON(!PageSwapBacked(page));
+
+        if (!expected)
+                error = radix_tree_preload(gfp & GFP_RECLAIM_MASK);
+        if (!error) {
+                page_cache_get(page);
+                page->mapping = mapping;
+                page->index = index;
+
+                spin_lock_irq(&mapping->tree_lock);
+                if (!expected)
+                        error = radix_tree_insert(&mapping->page_tree,
+                                                        index, page);
+                else
+                        error = shmem_radix_tree_replace(mapping, index,
+                                                        expected, page);
+                if (!error) {
+                        mapping->nrpages++;
+                        __inc_zone_page_state(page, NR_FILE_PAGES);
+                        __inc_zone_page_state(page, NR_SHMEM);
+                        spin_unlock_irq(&mapping->tree_lock);
+                } else {
+                        page->mapping = NULL;
+                        spin_unlock_irq(&mapping->tree_lock);
+                        page_cache_release(page);
                 }
-                *dir = subdir;
-                *page = NULL;
+                if (!expected)
+                        radix_tree_preload_end();
         }
-        shmem_dir_unmap(dir);
-        return shmem_swp_map(subdir) + offset;
+        if (error)
+                mem_cgroup_uncharge_cache_page(page);
+        return error;
 }
 
-static void shmem_swp_set(struct shmem_inode_info *info, swp_entry_t *entry, unsigned long value)
+/*
+ * Like delete_from_page_cache, but substitutes swap for page.
+ */
+static void shmem_delete_from_page_cache(struct page *page, void *radswap)
 {
-        long incdec = value? 1: -1;
+        struct address_space *mapping = page->mapping;
+        int error;
 
-        entry->val = value;
-        info->swapped += incdec;
-        if ((unsigned long)(entry - info->i_direct) >= SHMEM_NR_DIRECT) {
-                struct page *page = kmap_atomic_to_page(entry);
-                set_page_private(page, page_private(page) + incdec);
-        }
+        spin_lock_irq(&mapping->tree_lock);
+        error = shmem_radix_tree_replace(mapping, page->index, page, radswap);
+        page->mapping = NULL;
+        mapping->nrpages--;
+        __dec_zone_page_state(page, NR_FILE_PAGES);
+        __dec_zone_page_state(page, NR_SHMEM);
+        spin_unlock_irq(&mapping->tree_lock);
+        page_cache_release(page);
+        BUG_ON(error);
 }
 
-/**
- * shmem_swp_alloc - get the position of the swap entry for the page.
- * @info:       info structure for the inode
- * @index:      index of the page to find
- * @sgp:        check and recheck i_size? skip allocation?
- * @gfp:        gfp mask to use for any page allocation
- *
- * If the entry does not exist, allocate it.
+/*
+ * Like find_get_pages, but collecting swap entries as well as pages.
  */
-static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info,
-                        unsigned long index, enum sgp_type sgp, gfp_t gfp)
-{
-        struct inode *inode = &info->vfs_inode;
-        struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
-        struct page *page = NULL;
-        swp_entry_t *entry;
-
-        if (sgp != SGP_WRITE &&
-            ((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode))
-                return ERR_PTR(-EINVAL);
-
-        while (!(entry = shmem_swp_entry(info, index, &page))) {
-                if (sgp == SGP_READ)
-                        return shmem_swp_map(ZERO_PAGE(0));
-                /*
-                 * Test used_blocks against 1 less max_blocks, since we have 1 data
-                 * page (and perhaps indirect index pages) yet to allocate:
-                 * a waste to allocate index if we cannot allocate data.
-                 */
-                if (sbinfo->max_blocks) {
-                        if (percpu_counter_compare(&sbinfo->used_blocks,
-                                                sbinfo->max_blocks - 1) >= 0)
-                                return ERR_PTR(-ENOSPC);
-                        percpu_counter_inc(&sbinfo->used_blocks);
-                        inode->i_blocks += BLOCKS_PER_PAGE;
+static unsigned shmem_find_get_pages_and_swap(struct address_space *mapping,
+                                        pgoff_t start, unsigned int nr_pages,
+                                        struct page **pages, pgoff_t *indices)
+{
+        unsigned int i;
+        unsigned int ret;
+        unsigned int nr_found;
+
+        rcu_read_lock();
+restart:
+        nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
+                                (void ***)pages, indices, start, nr_pages);
+        ret = 0;
+        for (i = 0; i < nr_found; i++) {
+                struct page *page;
+repeat:
+                page = radix_tree_deref_slot((void **)pages[i]);
+                if (unlikely(!page))
+                        continue;
+                if (radix_tree_exception(page)) {
+                        if (radix_tree_deref_retry(page))
+                                goto restart;
+                        /*
+                         * Otherwise, we must be storing a swap entry
+                         * here as an exceptional entry: so return it
+                         * without attempting to raise page count.
+                         */
+                        goto export;
                 }
+                if (!page_cache_get_speculative(page))
+                        goto repeat;
 
-                spin_unlock(&info->lock);
-                page = shmem_dir_alloc(gfp);
-                spin_lock(&info->lock);
-
-                if (!page) {
-                        shmem_free_blocks(inode, 1);
-                        return ERR_PTR(-ENOMEM);
-                }
-                if (sgp != SGP_WRITE &&
-                    ((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
-                        entry = ERR_PTR(-EINVAL);
-                        break;
+                /* Has the page moved? */
+                if (unlikely(page != *((void **)pages[i]))) {
+                        page_cache_release(page);
+                        goto repeat;
                 }
-                if (info->next_index <= index)
-                        info->next_index = index + 1;
-        }
-        if (page) {
-                /* another task gave its page, or truncated the file */
-                shmem_free_blocks(inode, 1);
-                shmem_dir_free(page);
-        }
-        if (info->next_index <= index && !IS_ERR(entry))
-                info->next_index = index + 1;
-        return entry;
+export:
+                indices[ret] = indices[i];
+                pages[ret] = page;
+                ret++;
+        }
+        if (unlikely(!ret && nr_found))
+                goto restart;
+        rcu_read_unlock();
+        return ret;
 }
 
-/**
- * shmem_free_swp - free some swap entries in a directory
- * @dir:        pointer to the directory
- * @edir:       pointer after last entry of the directory
- * @punch_lock: pointer to spinlock when needed for the holepunch case
+/*
+ * Remove swap entry from radix tree, free the swap and its page cache.
  */
-static int shmem_free_swp(swp_entry_t *dir, swp_entry_t *edir,
-                                                spinlock_t *punch_lock)
-{
-        spinlock_t *punch_unlock = NULL;
-        swp_entry_t *ptr;
-        int freed = 0;
-
-        for (ptr = dir; ptr < edir; ptr++) {
-                if (ptr->val) {
-                        if (unlikely(punch_lock)) {
-                                punch_unlock = punch_lock;
-                                punch_lock = NULL;
-                                spin_lock(punch_unlock);
-                                if (!ptr->val)
-                                        continue;
-                        }
-                        free_swap_and_cache(*ptr);
-                        *ptr = (swp_entry_t){0};
-                        freed++;
-                }
-        }
-        if (punch_unlock)
-                spin_unlock(punch_unlock);
-        return freed;
-}
-
-static int shmem_map_and_free_swp(struct page *subdir, int offset,
-                int limit, struct page ***dir, spinlock_t *punch_lock)
-{
-        swp_entry_t *ptr;
-        int freed = 0;
-
-        ptr = shmem_swp_map(subdir);
-        for (; offset < limit; offset += LATENCY_LIMIT) {
-                int size = limit - offset;
-                if (size > LATENCY_LIMIT)
-                        size = LATENCY_LIMIT;
-                freed += shmem_free_swp(ptr+offset, ptr+offset+size,
-                                                        punch_lock);
-                if (need_resched()) {
-                        shmem_swp_unmap(ptr);
-                        if (*dir) {
-                                shmem_dir_unmap(*dir);
-                                *dir = NULL;
-                        }
-                        cond_resched();
-                        ptr = shmem_swp_map(subdir);
-                }
-        }
-        shmem_swp_unmap(ptr);
-        return freed;
+static int shmem_free_swap(struct address_space *mapping,
+                           pgoff_t index, void *radswap)
+{
+        int error;
+
+        spin_lock_irq(&mapping->tree_lock);
+        error = shmem_radix_tree_replace(mapping, index, radswap, NULL);
+        spin_unlock_irq(&mapping->tree_lock);
+        if (!error)
+                free_swap_and_cache(radix_to_swp_entry(radswap));
+        return error;
 }
 
-static void shmem_free_pages(struct list_head *next)
+/*
+ * Pagevec may contain swap entries, so shuffle up pages before releasing.
+ */
+static void shmem_pagevec_release(struct pagevec *pvec)
 {
-        struct page *page;
-        int freed = 0;
-
-        do {
-                page = container_of(next, struct page, lru);
-                next = next->next;
-                shmem_dir_free(page);
-                freed++;
-                if (freed >= LATENCY_LIMIT) {
-                        cond_resched();
-                        freed = 0;
-                }
-        } while (next);
+        int i, j;
+
+        for (i = 0, j = 0; i < pagevec_count(pvec); i++) {
+                struct page *page = pvec->pages[i];
+                if (!radix_tree_exceptional_entry(page))
+                        pvec->pages[j++] = page;
+        }
+        pvec->nr = j;
+        pagevec_release(pvec);
 }
 
-void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end)
+/*
+ * Remove range of pages and swap entries from radix tree, and free them.
+ */
+void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
 {
+        struct address_space *mapping = inode->i_mapping;
         struct shmem_inode_info *info = SHMEM_I(inode);
-        unsigned long idx;
-        unsigned long size;
-        unsigned long limit;
-        unsigned long stage;
-        unsigned long diroff;
-        struct page **dir;
-        struct page *topdir;
-        struct page *middir;
-        struct page *subdir;
-        swp_entry_t *ptr;
-        LIST_HEAD(pages_to_free);
-        long nr_pages_to_free = 0;
+        pgoff_t start = (lstart + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+        unsigned partial = lstart & (PAGE_CACHE_SIZE - 1);
+        pgoff_t end = (lend >> PAGE_CACHE_SHIFT);
+        struct pagevec pvec;
+        pgoff_t indices[PAGEVEC_SIZE];
         long nr_swaps_freed = 0;
-        int offset;
-        int freed;
-        int punch_hole;
-        spinlock_t *needs_lock;
-        spinlock_t *punch_lock;
-        unsigned long upper_limit;
+        pgoff_t index;
+        int i;
 
-        truncate_inode_pages_range(inode->i_mapping, start, end);
+        BUG_ON((lend & (PAGE_CACHE_SIZE - 1)) != (PAGE_CACHE_SIZE - 1));
 
-        inode->i_ctime = inode->i_mtime = CURRENT_TIME;
-        idx = (start + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-        if (idx >= info->next_index)
-                return;
+        pagevec_init(&pvec, 0);
+        index = start;
+        while (index <= end) {
+                pvec.nr = shmem_find_get_pages_and_swap(mapping, index,
+                        min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
+                                                        pvec.pages, indices);
+                if (!pvec.nr)
+                        break;
+                mem_cgroup_uncharge_start();
+                for (i = 0; i < pagevec_count(&pvec); i++) {
+                        struct page *page = pvec.pages[i];
 
-        spin_lock(&info->lock);
-        info->flags |= SHMEM_TRUNCATE;
-        if (likely(end == (loff_t) -1)) {
-                limit = info->next_index;
-                upper_limit = SHMEM_MAX_INDEX;
-                info->next_index = idx;
-                needs_lock = NULL;
-                punch_hole = 0;
-        } else {
-                if (end + 1 >= inode->i_size) { /* we may free a little more */
-                        limit = (inode->i_size + PAGE_CACHE_SIZE - 1) >>
-                                                        PAGE_CACHE_SHIFT;
-                        upper_limit = SHMEM_MAX_INDEX;
-                } else {
-                        limit = (end + 1) >> PAGE_CACHE_SHIFT;
-                        upper_limit = limit;
-                }
-                needs_lock = &info->lock;
-                punch_hole = 1;
-        }
+                        index = indices[i];
+                        if (index > end)
+                                break;
+
+                        if (radix_tree_exceptional_entry(page)) {
+                                nr_swaps_freed += !shmem_free_swap(mapping,
+                                                                index, page);
+                                continue;
+                        }
 
-        topdir = info->i_indirect;
-        if (topdir && idx <= SHMEM_NR_DIRECT && !punch_hole) {
-                info->i_indirect = NULL;
-                nr_pages_to_free++;
-                list_add(&topdir->lru, &pages_to_free);
+                        if (!trylock_page(page))
+                                continue;
+                        if (page->mapping == mapping) {
+                                VM_BUG_ON(PageWriteback(page));
+                                truncate_inode_page(mapping, page);
+                        }
+                        unlock_page(page);
+                }
+                shmem_pagevec_release(&pvec);
+                mem_cgroup_uncharge_end();
+                cond_resched();
+                index++;
         }
-        spin_unlock(&info->lock);
 
-        if (info->swapped && idx < SHMEM_NR_DIRECT) {
-                ptr = info->i_direct;
-                size = limit;
-                if (size > SHMEM_NR_DIRECT)
-                        size = SHMEM_NR_DIRECT;
-                nr_swaps_freed = shmem_free_swp(ptr+idx, ptr+size, needs_lock);
+        if (partial) {
+                struct page *page = NULL;
+                shmem_getpage(inode, start - 1, &page, SGP_READ, NULL);
+                if (page) {
+                        zero_user_segment(page, partial, PAGE_CACHE_SIZE);
+                        set_page_dirty(page);
+                        unlock_page(page);
+                        page_cache_release(page);
+                }
         }
 
-        /*
-         * If there are no indirect blocks or we are punching a hole
-         * below indirect blocks, nothing to be done.
-         */
-        if (!topdir || limit <= SHMEM_NR_DIRECT)
-                goto done2;
+        index = start;
+        for ( ; ; ) {
+                cond_resched();
+                pvec.nr = shmem_find_get_pages_and_swap(mapping, index,
+                        min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
+                                                        pvec.pages, indices);
+                if (!pvec.nr) {
+                        if (index == start)
+                                break;
+                        index = start;
+                        continue;
+                }
+                if (index == start && indices[0] > end) {
+                        shmem_pagevec_release(&pvec);
+                        break;
+                }
+                mem_cgroup_uncharge_start();
+                for (i = 0; i < pagevec_count(&pvec); i++) {
+                        struct page *page = pvec.pages[i];
 
-        /*
-         * The truncation case has already dropped info->lock, and we're safe
-         * because i_size and next_index have already been lowered, preventing
-         * access beyond.  But in the punch_hole case, we still need to take
-         * the lock when updating the swap directory, because there might be
-         * racing accesses by shmem_getpage(SGP_CACHE), shmem_unuse_inode or
-         * shmem_writepage.  However, whenever we find we can remove a whole
-         * directory page (not at the misaligned start or end of the range),
-         * we first NULLify its pointer in the level above, and then have no
-         * need to take the lock when updating its contents: needs_lock and
-         * punch_lock (either pointing to info->lock or NULL) manage this.
-         */
+                        index = indices[i];
+                        if (index > end)
+                                break;
 
-        upper_limit -= SHMEM_NR_DIRECT;
-        limit -= SHMEM_NR_DIRECT;
-        idx = (idx > SHMEM_NR_DIRECT)? (idx - SHMEM_NR_DIRECT): 0;
-        offset = idx % ENTRIES_PER_PAGE;
-        idx -= offset;
-
-        dir = shmem_dir_map(topdir);
-        stage = ENTRIES_PER_PAGEPAGE/2;
-        if (idx < ENTRIES_PER_PAGEPAGE/2) {
-                middir = topdir;
-                diroff = idx/ENTRIES_PER_PAGE;
-        } else {
-                dir += ENTRIES_PER_PAGE/2;
-                dir += (idx - ENTRIES_PER_PAGEPAGE/2)/ENTRIES_PER_PAGEPAGE;
-                while (stage <= idx)
-                        stage += ENTRIES_PER_PAGEPAGE;
-                middir = *dir;
-                if (*dir) {
-                        diroff = ((idx - ENTRIES_PER_PAGEPAGE/2) %
-                                ENTRIES_PER_PAGEPAGE) / ENTRIES_PER_PAGE;
-                        if (!diroff && !offset && upper_limit >= stage) {
-                                if (needs_lock) {
-                                        spin_lock(needs_lock);
-                                        *dir = NULL;
-                                        spin_unlock(needs_lock);
-                                        needs_lock = NULL;
-                                } else
-                                        *dir = NULL;
-                                nr_pages_to_free++;
-                                list_add(&middir->lru, &pages_to_free);
+                        if (radix_tree_exceptional_entry(page)) {
+                                nr_swaps_freed += !shmem_free_swap(mapping,
+                                                                index, page);
+                                continue;
                         }
-                        shmem_dir_unmap(dir);
-                        dir = shmem_dir_map(middir);
-                } else {
-                        diroff = 0;
-                        offset = 0;
-                        idx = stage;
-                }
-        }
 
-        for (; idx < limit; idx += ENTRIES_PER_PAGE, diroff++) {
-                if (unlikely(idx == stage)) {
-                        shmem_dir_unmap(dir);
-                        dir = shmem_dir_map(topdir) +
-                            ENTRIES_PER_PAGE/2 + idx/ENTRIES_PER_PAGEPAGE;
-                        while (!*dir) {
-                                dir++;
-                                idx += ENTRIES_PER_PAGEPAGE;
-                                if (idx >= limit)
-                                        goto done1;
-                        }
-                        stage = idx + ENTRIES_PER_PAGEPAGE;
-                        middir = *dir;
-                        if (punch_hole)
-                                needs_lock = &info->lock;
-                        if (upper_limit >= stage) {
-                                if (needs_lock) {
-                                        spin_lock(needs_lock);
-                                        *dir = NULL;
-                                        spin_unlock(needs_lock);
-                                        needs_lock = NULL;
-                                } else
-                                        *dir = NULL;
-                                nr_pages_to_free++;
-                                list_add(&middir->lru, &pages_to_free);
+                        lock_page(page);
+                        if (page->mapping == mapping) {
+                                VM_BUG_ON(PageWriteback(page));
+                                truncate_inode_page(mapping, page);
                         }
-                        shmem_dir_unmap(dir);
-                        cond_resched();
-                        dir = shmem_dir_map(middir);
-                        diroff = 0;
-                }
-                punch_lock = needs_lock;
-                subdir = dir[diroff];
-                if (subdir && !offset && upper_limit-idx >= ENTRIES_PER_PAGE) {
-                        if (needs_lock) {
-                                spin_lock(needs_lock);
-                                dir[diroff] = NULL;
-                                spin_unlock(needs_lock);
-                                punch_lock = NULL;
-                        } else
-                                dir[diroff] = NULL;
-                        nr_pages_to_free++;
-                        list_add(&subdir->lru, &pages_to_free);
-                }
-                if (subdir && page_private(subdir) /* has swap entries */) {
-                        size = limit - idx;
-                        if (size > ENTRIES_PER_PAGE)
-                                size = ENTRIES_PER_PAGE;
-                        freed = shmem_map_and_free_swp(subdir,
-                                        offset, size, &dir, punch_lock);
-                        if (!dir)
-                                dir = shmem_dir_map(middir);
-                        nr_swaps_freed += freed;
-                        if (offset || punch_lock) {
-                                spin_lock(&info->lock);
-                                set_page_private(subdir,
-                                        page_private(subdir) - freed);
-                                spin_unlock(&info->lock);
-                        } else
-                                BUG_ON(page_private(subdir) != freed);
+                        unlock_page(page);
                 }
-                offset = 0;
-        }
-done1:
-        shmem_dir_unmap(dir);
-done2:
-        if (inode->i_mapping->nrpages && (info->flags & SHMEM_PAGEIN)) {
-                /*
-                 * Call truncate_inode_pages again: racing shmem_unuse_inode
-                 * may have swizzled a page in from swap since
-                 * truncate_pagecache or generic_delete_inode did it, before we
-                 * lowered next_index.  Also, though shmem_getpage checks
-                 * i_size before adding to cache, no recheck after: so fix the
-                 * narrow window there too.
-                 */
-                truncate_inode_pages_range(inode->i_mapping, start, end);
+                shmem_pagevec_release(&pvec);
+                mem_cgroup_uncharge_end();
+                index++;
         }
 
         spin_lock(&info->lock);
-        info->flags &= ~SHMEM_TRUNCATE;
         info->swapped -= nr_swaps_freed;
-        if (nr_pages_to_free)
-                shmem_free_blocks(inode, nr_pages_to_free);
         shmem_recalc_inode(inode);
         spin_unlock(&info->lock);
 
-        /*
-         * Empty swap vector directory pages to be freed?
-         */
-        if (!list_empty(&pages_to_free)) {
-                pages_to_free.prev->next = NULL;
-                shmem_free_pages(pages_to_free.next);
-        }
+        inode->i_ctime = inode->i_mtime = CURRENT_TIME;
 }
 EXPORT_SYMBOL_GPL(shmem_truncate_range);
 
@@ -780,37 +520,7 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
         if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) {
                 loff_t oldsize = inode->i_size;
                 loff_t newsize = attr->ia_size;
-                struct page *page = NULL;
 
-                if (newsize < oldsize) {
-                        /*
-                         * If truncating down to a partial page, then
-                         * if that page is already allocated, hold it
-                         * in memory until the truncation is over, so
-                         * truncate_partial_page cannot miss it were
-                         * it assigned to swap.
-                         */
-                        if (newsize & (PAGE_CACHE_SIZE-1)) {
-                                (void) shmem_getpage(inode,
-                                        newsize >> PAGE_CACHE_SHIFT,
-                                                &page, SGP_READ, NULL);
-                                if (page)
-                                        unlock_page(page);
-                        }
-                        /*
-                         * Reset SHMEM_PAGEIN flag so that shmem_truncate can
-                         * detect if any pages might have been added to cache
-                         * after truncate_inode_pages.  But we needn't bother
-                         * if it's being fully truncated to zero-length: the
-                         * nrpages check is efficient enough in that case.
-                         */
-                        if (newsize) {
-                                struct shmem_inode_info *info = SHMEM_I(inode);
-                                spin_lock(&info->lock);
-                                info->flags &= ~SHMEM_PAGEIN;
-                                spin_unlock(&info->lock);
-                        }
-                }
                 if (newsize != oldsize) {
                         i_size_write(inode, newsize);
                         inode->i_ctime = inode->i_mtime = CURRENT_TIME;
@@ -822,8 +532,6 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
                         /* unmap again to remove racily COWed private pages */
                         unmap_mapping_range(inode->i_mapping, holebegin, 0, 1);
                 }
-                if (page)
-                        page_cache_release(page);
         }
 
         setattr_copy(inode, attr);
@@ -848,7 +556,8 @@ static void shmem_evict_inode(struct inode *inode)
                         list_del_init(&info->swaplist);
                         mutex_unlock(&shmem_swaplist_mutex);
                 }
-        }
+        } else
+                kfree(info->symlink);
 
         list_for_each_entry_safe(xattr, nxattr, &info->xattr_list, list) {
                 kfree(xattr->name);
@@ -859,106 +568,27 @@ static void shmem_evict_inode(struct inode *inode)
         end_writeback(inode);
 }
 
-static inline int shmem_find_swp(swp_entry_t entry, swp_entry_t *dir, swp_entry_t *edir)
-{
-        swp_entry_t *ptr;
-
-        for (ptr = dir; ptr < edir; ptr++) {
-                if (ptr->val == entry.val)
-                        return ptr - dir;
-        }
-        return -1;
-}
-
-static int shmem_unuse_inode(struct shmem_inode_info *info, swp_entry_t entry, struct page *page)
+/*
+ * If swap found in inode, free it and move page from swapcache to filecache.
+ */
+static int shmem_unuse_inode(struct shmem_inode_info *info,
+                             swp_entry_t swap, struct page *page)
 {
-        struct address_space *mapping;
-        unsigned long idx;
-        unsigned long size;
-        unsigned long limit;
-        unsigned long stage;
-        struct page **dir;
-        struct page *subdir;
-        swp_entry_t *ptr;
-        int offset;
+        struct address_space *mapping = info->vfs_inode.i_mapping;
+        void *radswap;
+        pgoff_t index;
         int error;
 
-        idx = 0;
-        ptr = info->i_direct;
-        spin_lock(&info->lock);
-        if (!info->swapped) {
-                list_del_init(&info->swaplist);
-                goto lost2;
-        }
-        limit = info->next_index;
-        size = limit;
-        if (size > SHMEM_NR_DIRECT)
-                size = SHMEM_NR_DIRECT;
-        offset = shmem_find_swp(entry, ptr, ptr+size);
-        if (offset >= 0) {
-                shmem_swp_balance_unmap();
-                goto found;
-        }
-        if (!info->i_indirect)
-                goto lost2;
-
-        dir = shmem_dir_map(info->i_indirect);
-        stage = SHMEM_NR_DIRECT + ENTRIES_PER_PAGEPAGE/2;
-
-        for (idx = SHMEM_NR_DIRECT; idx < limit; idx += ENTRIES_PER_PAGE, dir++) {
-                if (unlikely(idx == stage)) {
-                        shmem_dir_unmap(dir-1);
-                        if (cond_resched_lock(&info->lock)) {
-                                /* check it has not been truncated */
-                                if (limit > info->next_index) {
-                                        limit = info->next_index;
-                                        if (idx >= limit)
-                                                goto lost2;
-                                }
-                        }
-                        dir = shmem_dir_map(info->i_indirect) +
-                            ENTRIES_PER_PAGE/2 + idx/ENTRIES_PER_PAGEPAGE;
-                        while (!*dir) {
-                                dir++;
-                                idx += ENTRIES_PER_PAGEPAGE;
-                                if (idx >= limit)
-                                        goto lost1;
-                        }
-                        stage = idx + ENTRIES_PER_PAGEPAGE;
-                        subdir = *dir;
-                        shmem_dir_unmap(dir);
-                        dir = shmem_dir_map(subdir);
-                }
-                subdir = *dir;
-                if (subdir && page_private(subdir)) {
-                        ptr = shmem_swp_map(subdir);
-                        size = limit - idx;
-                        if (size > ENTRIES_PER_PAGE)
-                                size = ENTRIES_PER_PAGE;
-                        offset = shmem_find_swp(entry, ptr, ptr+size);
-                        shmem_swp_unmap(ptr);
-                        if (offset >= 0) {
-                                shmem_dir_unmap(dir);
-                                ptr = shmem_swp_map(subdir);
-                                goto found;
-                        }
-                }
-        }
-lost1:
-        shmem_dir_unmap(dir-1);
-lost2:
-        spin_unlock(&info->lock);
-        return 0;
-found:
-        idx += offset;
-        ptr += offset;
+        radswap = swp_to_radix_entry(swap);
+        index = radix_tree_locate_item(&mapping->page_tree, radswap);
+        if (index == -1)
+                return 0;
 
         /*
          * Move _head_ to start search for next from here.
          * But be careful: shmem_evict_inode checks list_empty without taking
          * mutex, and there's an instant in list_move_tail when info->swaplist
-         * would appear empty, if it were the only one on shmem_swaplist.  We
-         * could avoid doing it if inode NULL; or use this minor optimization.
+         * would appear empty, if it were the only one on shmem_swaplist.
          */
         if (shmem_swaplist.next != &info->swaplist)
                 list_move_tail(&shmem_swaplist, &info->swaplist);
@@ -968,29 +598,34 @@ found:
          * but also to hold up shmem_evict_inode(): so inode cannot be freed
          * beneath us (pagelock doesn't help until the page is in pagecache).
          */
-        mapping = info->vfs_inode.i_mapping;
-        error = add_to_page_cache_locked(page, mapping, idx, GFP_NOWAIT);
+        error = shmem_add_to_page_cache(page, mapping, index,
+                                                GFP_NOWAIT, radswap);
         /* which does mem_cgroup_uncharge_cache_page on error */
 
         if (error != -ENOMEM) {
+                /*
+                 * Truncation and eviction use free_swap_and_cache(), which
+                 * only does trylock page: if we raced, best clean up here.
+                 */
                 delete_from_swap_cache(page);
                 set_page_dirty(page);
-                info->flags |= SHMEM_PAGEIN;
-                shmem_swp_set(info, ptr, 0);
-                swap_free(entry);
+                if (!error) {
+                        spin_lock(&info->lock);
+                        info->swapped--;
+                        spin_unlock(&info->lock);
+                        swap_free(swap);
+                }
                 error = 1;      /* not an error, but entry was found */
         }
-        shmem_swp_unmap(ptr);
-        spin_unlock(&info->lock);
         return error;
 }
 
 /*
- * shmem_unuse() search for an eventually swapped out shmem page.
+ * Search through swapped inodes to find and replace swap by page.
  */
-int shmem_unuse(swp_entry_t entry, struct page *page)
+int shmem_unuse(swp_entry_t swap, struct page *page)
 {
-        struct list_head *p, *next;
+        struct list_head *this, *next;
         struct shmem_inode_info *info;
         int found = 0;
         int error;
@@ -999,32 +634,25 @@ int shmem_unuse(swp_entry_t entry, struct page *page)
          * Charge page using GFP_KERNEL while we can wait, before taking
          * the shmem_swaplist_mutex which might hold up shmem_writepage().
          * Charged back to the user (not to caller) when swap account is used.
-         * add_to_page_cache() will be called with GFP_NOWAIT.
          */
         error = mem_cgroup_cache_charge(page, current->mm, GFP_KERNEL);
         if (error)
                 goto out;
-        /*
-         * Try to preload while we can wait, to not make a habit of
-         * draining atomic reserves; but don't latch on to this cpu,
-         * it's okay if sometimes we get rescheduled after this.
-         */
-        error = radix_tree_preload(GFP_KERNEL);
-        if (error)
-                goto uncharge;
-        radix_tree_preload_end();
+        /* No radix_tree_preload: swap entry keeps a place for page in tree */
 
         mutex_lock(&shmem_swaplist_mutex);
-        list_for_each_safe(p, next, &shmem_swaplist) {
-                info = list_entry(p, struct shmem_inode_info, swaplist);
-                found = shmem_unuse_inode(info, entry, page);
+        list_for_each_safe(this, next, &shmem_swaplist) {
+                info = list_entry(this, struct shmem_inode_info, swaplist);
+                if (info->swapped)
+                        found = shmem_unuse_inode(info, swap, page);
+                else
+                        list_del_init(&info->swaplist);
                 cond_resched();
                 if (found)
                         break;
         }
         mutex_unlock(&shmem_swaplist_mutex);
 
-uncharge:
         if (!found)
                 mem_cgroup_uncharge_cache_page(page);
         if (found < 0)
@@ -1041,10 +669,10 @@ out:
 static int shmem_writepage(struct page *page, struct writeback_control *wbc)
 {
         struct shmem_inode_info *info;
-        swp_entry_t *entry, swap;
         struct address_space *mapping;
-        unsigned long index;
         struct inode *inode;
+        swp_entry_t swap;
+        pgoff_t index;
 
         BUG_ON(!PageLocked(page));
         mapping = page->mapping;
@@ -1073,50 +701,32 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
 
         /*
          * Add inode to shmem_unuse()'s list of swapped-out inodes,
-         * if it's not already there.  Do it now because we cannot take
-         * mutex while holding spinlock, and must do so before the page
-         * is moved to swap cache, when its pagelock no longer protects
+         * if it's not already there.  Do it now before the page is
+         * moved to swap cache, when its pagelock no longer protects
          * the inode from eviction.  But don't unlock the mutex until
-         * we've taken the spinlock, because shmem_unuse_inode() will
-         * prune a !swapped inode from the swaplist under both locks.
+         * we've incremented swapped, because shmem_unuse_inode() will
+         * prune a !swapped inode from the swaplist under this mutex.
          */
         mutex_lock(&shmem_swaplist_mutex);
         if (list_empty(&info->swaplist))
                 list_add_tail(&info->swaplist, &shmem_swaplist);
 
-        spin_lock(&info->lock);
-        mutex_unlock(&shmem_swaplist_mutex);
-
-        if (index >= info->next_index) {
-                BUG_ON(!(info->flags & SHMEM_TRUNCATE));
-                goto unlock;
-        }
-        entry = shmem_swp_entry(info, index, NULL);
-        if (entry->val) {
-                WARN_ON_ONCE(1);        /* Still happens? Tell us about it! */
-                free_swap_and_cache(*entry);
-                shmem_swp_set(info, entry, 0);
-        }
-        shmem_recalc_inode(inode);
-
         if (add_to_swap_cache(page, swap, GFP_ATOMIC) == 0) {
-                delete_from_page_cache(page);
-                shmem_swp_set(info, entry, swap.val);
-                shmem_swp_unmap(entry);
                 swap_shmem_alloc(swap);
+                shmem_delete_from_page_cache(page, swp_to_radix_entry(swap));
+
+                spin_lock(&info->lock);
+                info->swapped++;
+                shmem_recalc_inode(inode);
                 spin_unlock(&info->lock);
+
+                mutex_unlock(&shmem_swaplist_mutex);
                 BUG_ON(page_mapped(page));
                 swap_writepage(page, wbc);
                 return 0;
         }
 
-        shmem_swp_unmap(entry);
-unlock:
-        spin_unlock(&info->lock);
-        /*
-         * add_to_swap_cache() doesn't return -EEXIST, so we can safely
-         * clear SWAP_HAS_CACHE flag.
-         */
+        mutex_unlock(&shmem_swaplist_mutex);
         swapcache_free(swap, NULL);
 redirty:
         set_page_dirty(page);
@@ -1153,35 +763,33 @@ static struct mempolicy *shmem_get_sbmpol(struct shmem_sb_info *sbinfo)
 }
 #endif /* CONFIG_TMPFS */
 
-static struct page *shmem_swapin(swp_entry_t entry, gfp_t gfp,
-                        struct shmem_inode_info *info, unsigned long idx)
+static struct page *shmem_swapin(swp_entry_t swap, gfp_t gfp,
+                        struct shmem_inode_info *info, pgoff_t index)
 {
         struct mempolicy mpol, *spol;
         struct vm_area_struct pvma;
-        struct page *page;
 
         spol = mpol_cond_copy(&mpol,
-                                mpol_shared_policy_lookup(&info->policy, idx));
+                        mpol_shared_policy_lookup(&info->policy, index));
 
         /* Create a pseudo vma that just contains the policy */
         pvma.vm_start = 0;
-        pvma.vm_pgoff = idx;
+        pvma.vm_pgoff = index;
         pvma.vm_ops = NULL;
         pvma.vm_policy = spol;
-        page = swapin_readahead(entry, gfp, &pvma, 0);
-        return page;
+        return swapin_readahead(swap, gfp, &pvma, 0);
 }
 
 static struct page *shmem_alloc_page(gfp_t gfp,
-                        struct shmem_inode_info *info, unsigned long idx)
+                        struct shmem_inode_info *info, pgoff_t index)
 {
         struct vm_area_struct pvma;
 
         /* Create a pseudo vma that just contains the policy */
         pvma.vm_start = 0;
-        pvma.vm_pgoff = idx;
+        pvma.vm_pgoff = index;
         pvma.vm_ops = NULL;
-        pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
+        pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, index);
 
         /*
          * alloc_page_vma() will drop the shared policy reference
@@ -1190,19 +798,19 @@ static struct page *shmem_alloc_page(gfp_t gfp,
 }
 #else /* !CONFIG_NUMA */
 #ifdef CONFIG_TMPFS
-static inline void shmem_show_mpol(struct seq_file *seq, struct mempolicy *p)
+static inline void shmem_show_mpol(struct seq_file *seq, struct mempolicy *mpol)
 {
 }
 #endif /* CONFIG_TMPFS */
 
-static inline struct page *shmem_swapin(swp_entry_t entry, gfp_t gfp,
-                        struct shmem_inode_info *info, unsigned long idx)
+static inline struct page *shmem_swapin(swp_entry_t swap, gfp_t gfp,
+                        struct shmem_inode_info *info, pgoff_t index)
 {
-        return swapin_readahead(entry, gfp, NULL, 0);
+        return swapin_readahead(swap, gfp, NULL, 0);
 }
 
 static inline struct page *shmem_alloc_page(gfp_t gfp,
-                        struct shmem_inode_info *info, unsigned long idx)
+                        struct shmem_inode_info *info, pgoff_t index)
 {
         return alloc_page(gfp);
 }
@@ -1222,243 +830,190 @@ static inline struct mempolicy *shmem_get_sbmpol(struct shmem_sb_info *sbinfo)
  * vm. If we swap it in we mark it dirty since we also free the swap
  * entry since a page cannot live in both the swap and page cache
  */
-static int shmem_getpage_gfp(struct inode *inode, pgoff_t idx,
+static int shmem_getpage_gfp(struct inode *inode, pgoff_t index,
         struct page **pagep, enum sgp_type sgp, gfp_t gfp, int *fault_type)
 {
         struct address_space *mapping = inode->i_mapping;
-        struct shmem_inode_info *info = SHMEM_I(inode);
+        struct shmem_inode_info *info;
         struct shmem_sb_info *sbinfo;
         struct page *page;
-        struct page *prealloc_page = NULL;
-        swp_entry_t *entry;
         swp_entry_t swap;
         int error;
-        int ret;
+        int once = 0;
 
-        if (idx >= SHMEM_MAX_INDEX)
+        if (index > (MAX_LFS_FILESIZE >> PAGE_CACHE_SHIFT))
                 return -EFBIG;
 repeat:
-        page = find_lock_page(mapping, idx);
-        if (page) {
+        swap.val = 0;
+        page = find_lock_page(mapping, index);
+        if (radix_tree_exceptional_entry(page)) {
+                swap = radix_to_swp_entry(page);
+                page = NULL;
+        }
+
+        if (sgp != SGP_WRITE &&
+            ((loff_t)index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
+                error = -EINVAL;
+                goto failed;
+        }
+
+        if (page || (sgp == SGP_READ && !swap.val)) {
                 /*
                  * Once we can get the page lock, it must be uptodate:
                  * if there were an error in reading back from swap,
                  * the page would not be inserted into the filecache.
                  */
-                BUG_ON(!PageUptodate(page));
-                goto done;
+                BUG_ON(page && !PageUptodate(page));
+                *pagep = page;
+                return 0;
         }
 
         /*
-         * Try to preload while we can wait, to not make a habit of
-         * draining atomic reserves; but don't latch on to this cpu.
+         * Fast cache lookup did not find it:
+         * bring it back from swap or allocate.
          */
-        error = radix_tree_preload(gfp & GFP_RECLAIM_MASK);
-        if (error)
-                goto out;
-        radix_tree_preload_end();
-
-        if (sgp != SGP_READ && !prealloc_page) {
-                prealloc_page = shmem_alloc_page(gfp, info, idx);
-                if (prealloc_page) {
-                        SetPageSwapBacked(prealloc_page);
-                        if (mem_cgroup_cache_charge(prealloc_page,
-                                        current->mm, GFP_KERNEL)) {
-                                page_cache_release(prealloc_page);
-                                prealloc_page = NULL;
-                        }
-                }
-        }
-
-        spin_lock(&info->lock);
-        shmem_recalc_inode(inode);
-        entry = shmem_swp_alloc(info, idx, sgp, gfp);
-        if (IS_ERR(entry)) {
-                spin_unlock(&info->lock);
-                error = PTR_ERR(entry);
-                goto out;
-        }
-        swap = *entry;
+        info = SHMEM_I(inode);
+        sbinfo = SHMEM_SB(inode->i_sb);
 
         if (swap.val) {
                 /* Look it up and read it in.. */
                 page = lookup_swap_cache(swap);
                 if (!page) {
-                        shmem_swp_unmap(entry);
-                        spin_unlock(&info->lock);
                         /* here we actually do the io */
                         if (fault_type)
                                 *fault_type |= VM_FAULT_MAJOR;
-                        page = shmem_swapin(swap, gfp, info, idx);
+                        page = shmem_swapin(swap, gfp, info, index);
                         if (!page) {
-                                spin_lock(&info->lock);
-                                entry = shmem_swp_alloc(info, idx, sgp, gfp);
-                                if (IS_ERR(entry))
-                                        error = PTR_ERR(entry);
-                                else {
-                                        if (entry->val == swap.val)
-                                                error = -ENOMEM;
-                                        shmem_swp_unmap(entry);
-                                }
-                                spin_unlock(&info->lock);
-                                if (error)
-                                        goto out;
-                                goto repeat;
+                                error = -ENOMEM;
+                                goto failed;
                         }
-                        wait_on_page_locked(page);
-                        page_cache_release(page);
-                        goto repeat;
                 }
 
                 /* We have to do this with page locked to prevent races */
-                if (!trylock_page(page)) {
-                        shmem_swp_unmap(entry);
-                        spin_unlock(&info->lock);
-                        wait_on_page_locked(page);
-                        page_cache_release(page);
-                        goto repeat;
-                }
-                if (PageWriteback(page)) {
-                        shmem_swp_unmap(entry);
-                        spin_unlock(&info->lock);
-                        wait_on_page_writeback(page);
-                        unlock_page(page);
-                        page_cache_release(page);
-                        goto repeat;
-                }
+                lock_page(page);
                 if (!PageUptodate(page)) {
-                        shmem_swp_unmap(entry);
-                        spin_unlock(&info->lock);
-                        unlock_page(page);
-                        page_cache_release(page);
                         error = -EIO;
-                        goto out;
+                        goto failed;
                 }
-
-                error = add_to_page_cache_locked(page, mapping,
-                                                 idx, GFP_NOWAIT);
-                if (error) {
-                        shmem_swp_unmap(entry);
-                        spin_unlock(&info->lock);
-                        if (error == -ENOMEM) {
-                                /*
-                                 * reclaim from proper memory cgroup and
-                                 * call memcg's OOM if needed.
-                                 */
-                                error = mem_cgroup_shmem_charge_fallback(
-                                                page, current->mm, gfp);
-                                if (error) {
-                                        unlock_page(page);
-                                        page_cache_release(page);
-                                        goto out;
-                                }
-                        }
-                        unlock_page(page);
-                        page_cache_release(page);
-                        goto repeat;
+                wait_on_page_writeback(page);
+
+                /* Someone may have already done it for us */
+                if (page->mapping) {
+                        if (page->mapping == mapping &&
+                            page->index == index)
+                                goto done;
+                        error = -EEXIST;
+                        goto failed;
                 }
 
-                info->flags |= SHMEM_PAGEIN;
-                shmem_swp_set(info, entry, 0);
-                shmem_swp_unmap(entry);
-                delete_from_swap_cache(page);
+                error = mem_cgroup_cache_charge(page, current->mm,
+                                                gfp & GFP_RECLAIM_MASK);
+                if (!error)
+                        error = shmem_add_to_page_cache(page, mapping, index,
+                                                gfp, swp_to_radix_entry(swap));
+                if (error)
+                        goto failed;
+
+                spin_lock(&info->lock);
+                info->swapped--;
+                shmem_recalc_inode(inode);
                 spin_unlock(&info->lock);
+
+                delete_from_swap_cache(page);
                 set_page_dirty(page);
                 swap_free(swap);
 
-        } else if (sgp == SGP_READ) {
-                shmem_swp_unmap(entry);
-                page = find_get_page(mapping, idx);
-                if (page && !trylock_page(page)) {
-                        spin_unlock(&info->lock);
-                        wait_on_page_locked(page);
-                        page_cache_release(page);
-                        goto repeat;
+        } else {
+                if (shmem_acct_block(info->flags)) {
+                        error = -ENOSPC;
+                        goto failed;
                 }
-                spin_unlock(&info->lock);
-
-        } else if (prealloc_page) {
-                shmem_swp_unmap(entry);
-                sbinfo = SHMEM_SB(inode->i_sb);
                 if (sbinfo->max_blocks) {
                         if (percpu_counter_compare(&sbinfo->used_blocks,
-                                                sbinfo->max_blocks) >= 0 ||
-                            shmem_acct_block(info->flags))
-                                goto nospace;
+                                                sbinfo->max_blocks) >= 0) {
+                                error = -ENOSPC;
+                                goto unacct;
+                        }
                         percpu_counter_inc(&sbinfo->used_blocks);
-                        inode->i_blocks += BLOCKS_PER_PAGE;
-                } else if (shmem_acct_block(info->flags))
-                        goto nospace;
-
-                page = prealloc_page;
-                prealloc_page = NULL;
-
-                entry = shmem_swp_alloc(info, idx, sgp, gfp);
-                if (IS_ERR(entry))
-                        error = PTR_ERR(entry);
-                else {
-                        swap = *entry;
-                        shmem_swp_unmap(entry);
                 }
-                ret = error || swap.val;
-                if (ret)
-                        mem_cgroup_uncharge_cache_page(page);
-                else
-                        ret = add_to_page_cache_lru(page, mapping,
-                                                idx, GFP_NOWAIT);
-                /*
-                 * At add_to_page_cache_lru() failure,
-                 * uncharge will be done automatically.
-                 */
-                if (ret) {
-                        shmem_unacct_blocks(info->flags, 1);
-                        shmem_free_blocks(inode, 1);
-                        spin_unlock(&info->lock);
-                        page_cache_release(page);
-                        if (error)
-                                goto out;
-                        goto repeat;
+
+                page = shmem_alloc_page(gfp, info, index);
+                if (!page) {
+                        error = -ENOMEM;
+                        goto decused;
                 }
 
-                info->flags |= SHMEM_PAGEIN;
+                SetPageSwapBacked(page);
+                __set_page_locked(page);
+                error = mem_cgroup_cache_charge(page, current->mm,
+                                                gfp & GFP_RECLAIM_MASK);
+                if (!error)
+                        error = shmem_add_to_page_cache(page, mapping, index,
+                                                gfp, NULL);
+                if (error)
+                        goto decused;
+                lru_cache_add_anon(page);
+
+                spin_lock(&info->lock);
                 info->alloced++;
+                inode->i_blocks += BLOCKS_PER_PAGE;
+                shmem_recalc_inode(inode);
                 spin_unlock(&info->lock);
+
                 clear_highpage(page);
                 flush_dcache_page(page);
                 SetPageUptodate(page);
                 if (sgp == SGP_DIRTY)
                         set_page_dirty(page);
-
-        } else {
-                spin_unlock(&info->lock);
-                error = -ENOMEM;
-                goto out;
         }
 done:
-        *pagep = page;
-        error = 0;
-out:
-        if (prealloc_page) {
-                mem_cgroup_uncharge_cache_page(prealloc_page);
-                page_cache_release(prealloc_page);
+        /* Perhaps the file has been truncated since we checked */
+        if (sgp != SGP_WRITE &&
+            ((loff_t)index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
+                error = -EINVAL;
+                goto trunc;
         }
-        return error;
+        *pagep = page;
+        return 0;
 
-nospace:
         /*
-         * Perhaps the page was brought in from swap between find_lock_page
-         * and taking info->lock?  We allow for that at add_to_page_cache_lru,
-         * but must also avoid reporting a spurious ENOSPC while working on a
-         * full tmpfs.
+         * Error recovery.
          */
-        page = find_get_page(mapping, idx);
+trunc:
+        ClearPageDirty(page);
+        delete_from_page_cache(page);
+        spin_lock(&info->lock);
+        info->alloced--;
+        inode->i_blocks -= BLOCKS_PER_PAGE;
         spin_unlock(&info->lock);
+decused:
+        if (sbinfo->max_blocks)
+                percpu_counter_add(&sbinfo->used_blocks, -1);
+unacct:
+        shmem_unacct_blocks(info->flags, 1);
+failed:
+        if (swap.val && error != -EINVAL) {
+                struct page *test = find_get_page(mapping, index);
+                if (test && !radix_tree_exceptional_entry(test))
+                        page_cache_release(test);
+                /* Have another try if the entry has changed */
+                if (test != swp_to_radix_entry(swap))
+                        error = -EEXIST;
+        }
         if (page) {
+                unlock_page(page);
                 page_cache_release(page);
+        }
+        if (error == -ENOSPC && !once++) {
+                info = SHMEM_I(inode);
+                spin_lock(&info->lock);
+                shmem_recalc_inode(inode);
+                spin_unlock(&info->lock);
                 goto repeat;
         }
-        error = -ENOSPC;
-        goto out;
+        if (error == -EEXIST)
+                goto repeat;
+        return error;
 }
 
 static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
@@ -1467,9 +1022,6 @@ static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
         int error;
         int ret = VM_FAULT_LOCKED;
 
-        if (((loff_t)vmf->pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
-                return VM_FAULT_SIGBUS;
-
         error = shmem_getpage(inode, vmf->pgoff, &vmf->page, SGP_CACHE, &ret);
         if (error)
                 return ((error == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS);
@@ -1482,20 +1034,20 @@ static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 }
 
 #ifdef CONFIG_NUMA
-static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *new)
+static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *mpol)
 {
-        struct inode *i = vma->vm_file->f_path.dentry->d_inode;
-        return mpol_set_shared_policy(&SHMEM_I(i)->policy, vma, new);
+        struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+        return mpol_set_shared_policy(&SHMEM_I(inode)->policy, vma, mpol);
 }
 
 static struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
                                           unsigned long addr)
 {
-        struct inode *i = vma->vm_file->f_path.dentry->d_inode;
-        unsigned long idx;
+        struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+        pgoff_t index;
 
-        idx = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
-        return mpol_shared_policy_lookup(&SHMEM_I(i)->policy, idx);
+        index = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
+        return mpol_shared_policy_lookup(&SHMEM_I(inode)->policy, index);
 }
 #endif
 
@@ -1593,7 +1145,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode
 
 #ifdef CONFIG_TMPFS
 static const struct inode_operations shmem_symlink_inode_operations;
-static const struct inode_operations shmem_symlink_inline_operations;
+static const struct inode_operations shmem_short_symlink_operations;
 
 static int
 shmem_write_begin(struct file *file, struct address_space *mapping,
@@ -1626,7 +1178,8 @@ static void do_shmem_file_read(struct file *filp, loff_t *ppos, read_descriptor_
 {
         struct inode *inode = filp->f_path.dentry->d_inode;
         struct address_space *mapping = inode->i_mapping;
-        unsigned long index, offset;
+        pgoff_t index;
+        unsigned long offset;
         enum sgp_type sgp = SGP_READ;
 
         /*
@@ -1642,7 +1195,8 @@ static void do_shmem_file_read(struct file *filp, loff_t *ppos, read_descriptor_
 
         for (;;) {
                 struct page *page = NULL;
-                unsigned long end_index, nr, ret;
+                pgoff_t end_index;
+                unsigned long nr, ret;
                 loff_t i_size = i_size_read(inode);
 
                 end_index = i_size >> PAGE_CACHE_SHIFT;
@@ -1880,8 +1434,9 @@ static int shmem_statfs(struct dentry *dentry, struct kstatfs *buf)
         buf->f_namelen = NAME_MAX;
         if (sbinfo->max_blocks) {
                 buf->f_blocks = sbinfo->max_blocks;
-                buf->f_bavail = buf->f_bfree =
-                                sbinfo->max_blocks - percpu_counter_sum(&sbinfo->used_blocks);
+                buf->f_bavail =
+                buf->f_bfree  = sbinfo->max_blocks -
+                                percpu_counter_sum(&sbinfo->used_blocks);
         }
         if (sbinfo->max_inodes) {
                 buf->f_files = sbinfo->max_inodes;
@@ -2055,10 +1610,13 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
 
         info = SHMEM_I(inode);
         inode->i_size = len-1;
-        if (len <= SHMEM_SYMLINK_INLINE_LEN) {
-                /* do it inline */
-                memcpy(info->inline_symlink, symname, len);
-                inode->i_op = &shmem_symlink_inline_operations;
+        if (len <= SHORT_SYMLINK_LEN) {
+                info->symlink = kmemdup(symname, len, GFP_KERNEL);
+                if (!info->symlink) {
+                        iput(inode);
+                        return -ENOMEM;
+                }
+                inode->i_op = &shmem_short_symlink_operations;
         } else {
                 error = shmem_getpage(inode, 0, &page, SGP_WRITE, NULL);
                 if (error) {
@@ -2081,17 +1639,17 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
         return 0;
 }
 
-static void *shmem_follow_link_inline(struct dentry *dentry, struct nameidata *nd)
+static void *shmem_follow_short_symlink(struct dentry *dentry, struct nameidata *nd)
 {
-        nd_set_link(nd, SHMEM_I(dentry->d_inode)->inline_symlink);
+        nd_set_link(nd, SHMEM_I(dentry->d_inode)->symlink);
         return NULL;
 }
 
 static void *shmem_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
         struct page *page = NULL;
-        int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL);
-        nd_set_link(nd, res ? ERR_PTR(res) : kmap(page));
+        int error = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL);
+        nd_set_link(nd, error ? ERR_PTR(error) : kmap(page));
         if (page)
                 unlock_page(page);
         return page;
@@ -2202,7 +1760,6 @@ out:
         return err;
 }
 
-
 static const struct xattr_handler *shmem_xattr_handlers[] = {
 #ifdef CONFIG_TMPFS_POSIX_ACL
         &generic_acl_access_handler,
@@ -2332,9 +1889,9 @@ static ssize_t shmem_listxattr(struct dentry *dentry, char *buffer, size_t size)
 }
 #endif /* CONFIG_TMPFS_XATTR */
 
-static const struct inode_operations shmem_symlink_inline_operations = {
+static const struct inode_operations shmem_short_symlink_operations = {
         .readlink       = generic_readlink,
-        .follow_link    = shmem_follow_link_inline,
+        .follow_link    = shmem_follow_short_symlink,
 #ifdef CONFIG_TMPFS_XATTR
         .setxattr       = shmem_setxattr,
         .getxattr       = shmem_getxattr,
@@ -2534,8 +2091,7 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
         if (config.max_inodes < inodes)
                 goto out;
         /*
-         * Those tests also disallow limited->unlimited while any are in
-         * use, so i_blocks will always be zero when max_blocks is zero;
+         * Those tests disallow limited->unlimited while any are in use;
          * but we must separately disallow unlimited->limited, because
          * in that case we have no record of how much is already in use.
          */
@@ -2627,7 +2183,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
                 goto failed;
         sbinfo->free_inodes = sbinfo->max_inodes;
 
-        sb->s_maxbytes = SHMEM_MAX_BYTES;
+        sb->s_maxbytes = MAX_LFS_FILESIZE;
         sb->s_blocksize = PAGE_CACHE_SIZE;
         sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
         sb->s_magic = TMPFS_MAGIC;
@@ -2662,14 +2218,14 @@ static struct kmem_cache *shmem_inode_cachep;
 
 static struct inode *shmem_alloc_inode(struct super_block *sb)
 {
-        struct shmem_inode_info *p;
-        p = (struct shmem_inode_info *)kmem_cache_alloc(shmem_inode_cachep, GFP_KERNEL);
-        if (!p)
+        struct shmem_inode_info *info;
+        info = kmem_cache_alloc(shmem_inode_cachep, GFP_KERNEL);
+        if (!info)
                 return NULL;
-        return &p->vfs_inode;
+        return &info->vfs_inode;
 }
 
-static void shmem_i_callback(struct rcu_head *head)
+static void shmem_destroy_callback(struct rcu_head *head)
 {
         struct inode *inode = container_of(head, struct inode, i_rcu);
         INIT_LIST_HEAD(&inode->i_dentry);
@@ -2678,29 +2234,26 @@ static void shmem_i_callback(struct rcu_head *head)
 
 static void shmem_destroy_inode(struct inode *inode)
 {
-        if ((inode->i_mode & S_IFMT) == S_IFREG) {
-                /* only struct inode is valid if it's an inline symlink */
+        if ((inode->i_mode & S_IFMT) == S_IFREG)
                 mpol_free_shared_policy(&SHMEM_I(inode)->policy);
-        }
-        call_rcu(&inode->i_rcu, shmem_i_callback);
+        call_rcu(&inode->i_rcu, shmem_destroy_callback);
 }
 
-static void init_once(void *foo)
+static void shmem_init_inode(void *foo)
 {
-        struct shmem_inode_info *p = (struct shmem_inode_info *) foo;
-
-        inode_init_once(&p->vfs_inode);
+        struct shmem_inode_info *info = foo;
+        inode_init_once(&info->vfs_inode);
 }
 
-static int init_inodecache(void)
+static int shmem_init_inodecache(void)
 {
         shmem_inode_cachep = kmem_cache_create("shmem_inode_cache",
                                 sizeof(struct shmem_inode_info),
-                                0, SLAB_PANIC, init_once);
+                                0, SLAB_PANIC, shmem_init_inode);
         return 0;
 }
 
-static void destroy_inodecache(void)
+static void shmem_destroy_inodecache(void)
 {
         kmem_cache_destroy(shmem_inode_cachep);
 }
@@ -2797,21 +2350,20 @@ static const struct vm_operations_struct shmem_vm_ops = {
 #endif
 };
 
-
 static struct dentry *shmem_mount(struct file_system_type *fs_type,
         int flags, const char *dev_name, void *data)
 {
         return mount_nodev(fs_type, flags, data, shmem_fill_super);
 }
 
-static struct file_system_type tmpfs_fs_type = {
+static struct file_system_type shmem_fs_type = {
         .owner          = THIS_MODULE,
         .name           = "tmpfs",
         .mount          = shmem_mount,
         .kill_sb        = kill_litter_super,
 };
 
-int __init init_tmpfs(void)
+int __init shmem_init(void)
 {
         int error;
 
@@ -2819,18 +2371,18 @@ int __init init_tmpfs(void)
         if (error)
                 goto out4;
 
-        error = init_inodecache();
+        error = shmem_init_inodecache();
         if (error)
                 goto out3;
 
-        error = register_filesystem(&tmpfs_fs_type);
+        error = register_filesystem(&shmem_fs_type);
         if (error) {
                 printk(KERN_ERR "Could not register tmpfs\n");
                 goto out2;
         }
 
-        shm_mnt = vfs_kern_mount(&tmpfs_fs_type, MS_NOUSER,
-                                tmpfs_fs_type.name, NULL);
+        shm_mnt = vfs_kern_mount(&shmem_fs_type, MS_NOUSER,
+                                 shmem_fs_type.name, NULL);
         if (IS_ERR(shm_mnt)) {
                 error = PTR_ERR(shm_mnt);
                 printk(KERN_ERR "Could not kern_mount tmpfs\n");
@@ -2839,9 +2391,9 @@ int __init init_tmpfs(void)
         return 0;
 
 out1:
-        unregister_filesystem(&tmpfs_fs_type);
+        unregister_filesystem(&shmem_fs_type);
 out2:
-        destroy_inodecache();
+        shmem_destroy_inodecache();
 out3:
         bdi_destroy(&shmem_backing_dev_info);
 out4:
@@ -2849,45 +2401,6 @@ out4:
         return error;
 }
 
-#ifdef CONFIG_CGROUP_MEM_RES_CTLR
-/**
- * mem_cgroup_get_shmem_target - find a page or entry assigned to the shmem file
- * @inode: the inode to be searched
- * @pgoff: the offset to be searched
- * @pagep: the pointer for the found page to be stored
- * @ent: the pointer for the found swap entry to be stored
- *
- * If a page is found, refcount of it is incremented. Callers should handle
- * these refcount.
- */
-void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
-                                        struct page **pagep, swp_entry_t *ent)
-{
-        swp_entry_t entry = { .val = 0 }, *ptr;
-        struct page *page = NULL;
-        struct shmem_inode_info *info = SHMEM_I(inode);
-
-        if ((pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
-                goto out;
-
-        spin_lock(&info->lock);
-        ptr = shmem_swp_entry(info, pgoff, NULL);
-#ifdef CONFIG_SWAP
-        if (ptr && ptr->val) {
-                entry.val = ptr->val;
-                page = find_get_page(&swapper_space, entry.val);
-        } else
-#endif
-                page = find_get_page(inode->i_mapping, pgoff);
-        if (ptr)
-                shmem_swp_unmap(ptr);
-        spin_unlock(&info->lock);
-out:
-        *pagep = page;
-        *ent = entry;
-}
-#endif
-
 #else /* !CONFIG_SHMEM */
 
 /*
@@ -2901,23 +2414,23 @@ out:
 
 #include <linux/ramfs.h>
 
-static struct file_system_type tmpfs_fs_type = {
+static struct file_system_type shmem_fs_type = {
         .name           = "tmpfs",
         .mount          = ramfs_mount,
         .kill_sb        = kill_litter_super,
 };
 
-int __init init_tmpfs(void)
+int __init shmem_init(void)
 {
-        BUG_ON(register_filesystem(&tmpfs_fs_type) != 0);
+        BUG_ON(register_filesystem(&shmem_fs_type) != 0);
 
-        shm_mnt = kern_mount(&tmpfs_fs_type);
+        shm_mnt = kern_mount(&shmem_fs_type);
         BUG_ON(IS_ERR(shm_mnt));
 
         return 0;
 }
 
-int shmem_unuse(swp_entry_t entry, struct page *page)
+int shmem_unuse(swp_entry_t swap, struct page *page)
 {
         return 0;
 }
@@ -2927,43 +2440,17 @@ int shmem_lock(struct file *file, int lock, struct user_struct *user)
         return 0;
 }
 
-void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end)
+void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
 {
-        truncate_inode_pages_range(inode->i_mapping, start, end);
+        truncate_inode_pages_range(inode->i_mapping, lstart, lend);
 }
 EXPORT_SYMBOL_GPL(shmem_truncate_range);
 
-#ifdef CONFIG_CGROUP_MEM_RES_CTLR
-/**
- * mem_cgroup_get_shmem_target - find a page or entry assigned to the shmem file
- * @inode: the inode to be searched
- * @pgoff: the offset to be searched
- * @pagep: the pointer for the found page to be stored
- * @ent: the pointer for the found swap entry to be stored
- *
- * If a page is found, refcount of it is incremented. Callers should handle
- * these refcount.
- */
-void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
-                                        struct page **pagep, swp_entry_t *ent)
-{
-        struct page *page = NULL;
-
-        if ((pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
-                goto out;
-        page = find_get_page(inode->i_mapping, pgoff);
-out:
-        *pagep = page;
-        *ent = (swp_entry_t){ .val = 0 };
-}
-#endif
-
 #define shmem_vm_ops                            generic_file_vm_ops
 #define shmem_file_operations                   ramfs_file_operations
 #define shmem_get_inode(sb, dir, mode, dev, flags)      ramfs_get_inode(sb, dir, mode, dev)
 #define shmem_acct_size(flags, size)            0
 #define shmem_unacct_size(flags, size)          do {} while (0)
-#define SHMEM_MAX_BYTES                         MAX_LFS_FILESIZE
 
 #endif /* CONFIG_SHMEM */
 
@@ -2987,7 +2474,7 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
         if (IS_ERR(shm_mnt))
                 return (void *)shm_mnt;
 
-        if (size < 0 || size > SHMEM_MAX_BYTES)
+        if (size < 0 || size > MAX_LFS_FILESIZE)
                 return ERR_PTR(-EINVAL);
 
         if (shmem_acct_size(flags, size))
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 1b8c33907242..17bc224bce68 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1924,20 +1924,24 @@ static unsigned long read_swap_header(struct swap_info_struct *p,
 
         /*
          * Find out how many pages are allowed for a single swap
-         * device. There are two limiting factors: 1) the number of
-         * bits for the swap offset in the swp_entry_t type and
-         * 2) the number of bits in the a swap pte as defined by
-         * the different architectures. In order to find the
-         * largest possible bit mask a swap entry with swap type 0
+         * device. There are three limiting factors: 1) the number
+         * of bits for the swap offset in the swp_entry_t type, and
+         * 2) the number of bits in the swap pte as defined by the
+         * the different architectures, and 3) the number of free bits
+         * in an exceptional radix_tree entry. In order to find the
+         * largest possible bit mask, a swap entry with swap type 0
          * and swap offset ~0UL is created, encoded to a swap pte,
-         * decoded to a swp_entry_t again and finally the swap
+         * decoded to a swp_entry_t again, and finally the swap
          * offset is extracted. This will mask all the bits from
          * the initial ~0UL mask that can't be encoded in either
          * the swp_entry_t or the architecture definition of a
-         * swap pte.
+         * swap pte.  Then the same is done for a radix_tree entry.
          */
         maxpages = swp_offset(pte_to_swp_entry(
-                        swp_entry_to_pte(swp_entry(0, ~0UL)))) + 1;
+                        swp_entry_to_pte(swp_entry(0, ~0UL))));
+        maxpages = swp_offset(radix_to_swp_entry(
+                        swp_to_radix_entry(swp_entry(0, maxpages)))) + 1;
+
         if (maxpages > swap_header->info.last_page) {
                 maxpages = swap_header->info.last_page + 1;
                 /* p->max is an unsigned int: don't overflow it */
diff --git a/mm/truncate.c b/mm/truncate.c
index 232eb2736a79..b40ac6d4e86e 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -336,6 +336,14 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
         unsigned long count = 0;
         int i;
 
+        /*
+         * Note: this function may get called on a shmem/tmpfs mapping:
+         * pagevec_lookup() might then return 0 prematurely (because it
+         * got a gangful of swap entries); but it's hardly worth worrying
+         * about - it can rarely have anything to free from such a mapping
+         * (most pages are dirty), and already skips over any difficulties.
+         */
+
         pagevec_init(&pvec, 0);
         while (index <= end && pagevec_lookup(&pvec, mapping, index,
                         min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1)) {
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 6d8ef4a3a9b5..8b2d37b59c9e 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -128,34 +128,34 @@ unsigned long long get_msr(int cpu, off_t offset)
 void print_header(void)
 {
         if (show_pkg)
-                fprintf(stderr, "pkg ");
+                fprintf(stderr, "pk");
         if (show_core)
-                fprintf(stderr, "core");
+                fprintf(stderr, " cr");
         if (show_cpu)
                 fprintf(stderr, " CPU");
         if (do_nhm_cstates)
-                fprintf(stderr, "   %%c0 ");
+                fprintf(stderr, "    %%c0 ");
         if (has_aperf)
-                fprintf(stderr, "  GHz");
+                fprintf(stderr, " GHz");
         fprintf(stderr, "  TSC");
         if (do_nhm_cstates)
-                fprintf(stderr, "   %%c1 ");
+                fprintf(stderr, "    %%c1");
         if (do_nhm_cstates)
-                fprintf(stderr, "   %%c3 ");
+                fprintf(stderr, "    %%c3");
         if (do_nhm_cstates)
-                fprintf(stderr, "   %%c6 ");
+                fprintf(stderr, "    %%c6");
         if (do_snb_cstates)
-                fprintf(stderr, "   %%c7 ");
+                fprintf(stderr, "    %%c7");
         if (do_snb_cstates)
-                fprintf(stderr, "  %%pc2 ");
+                fprintf(stderr, "  %%pc2");
         if (do_nhm_cstates)
-                fprintf(stderr, "  %%pc3 ");
+                fprintf(stderr, "  %%pc3");
         if (do_nhm_cstates)
-                fprintf(stderr, "  %%pc6 ");
+                fprintf(stderr, "  %%pc6");
         if (do_snb_cstates)
-                fprintf(stderr, "  %%pc7 ");
+                fprintf(stderr, "  %%pc7");
         if (extra_msr_offset)
-                fprintf(stderr, "       MSR 0x%x ", extra_msr_offset);
+                fprintf(stderr, "        MSR 0x%x ", extra_msr_offset);
 
         putc('\n', stderr);
 }
@@ -194,14 +194,14 @@ void print_cnt(struct counters *p)
         /* topology columns, print blanks on 1st (average) line */
         if (p == cnt_average) {
                 if (show_pkg)
-                        fprintf(stderr, "    ");
+                        fprintf(stderr, " ");
                 if (show_core)
                         fprintf(stderr, "    ");
                 if (show_cpu)
                         fprintf(stderr, "    ");
         } else {
                 if (show_pkg)
-                        fprintf(stderr, "%4d", p->pkg);
+                        fprintf(stderr, "%d", p->pkg);
                 if (show_core)
                         fprintf(stderr, "%4d", p->core);
                 if (show_cpu)
@@ -241,22 +241,22 @@ void print_cnt(struct counters *p)
                 if (!skip_c1)
                         fprintf(stderr, "%7.2f", 100.0 * p->c1/p->tsc);
                 else
-                        fprintf(stderr, "   ****");
+                        fprintf(stderr, "  ****");
         }
         if (do_nhm_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->c3/p->tsc);
+                fprintf(stderr, " %6.2f", 100.0 * p->c3/p->tsc);
         if (do_nhm_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->c6/p->tsc);
+                fprintf(stderr, " %6.2f", 100.0 * p->c6/p->tsc);
         if (do_snb_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->c7/p->tsc);
+                fprintf(stderr, " %6.2f", 100.0 * p->c7/p->tsc);
         if (do_snb_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->pc2/p->tsc);
+                fprintf(stderr, " %5.2f", 100.0 * p->pc2/p->tsc);
         if (do_nhm_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->pc3/p->tsc);
+                fprintf(stderr, " %5.2f", 100.0 * p->pc3/p->tsc);
         if (do_nhm_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->pc6/p->tsc);
+                fprintf(stderr, " %5.2f", 100.0 * p->pc6/p->tsc);
         if (do_snb_cstates)
-                fprintf(stderr, "%7.2f", 100.0 * p->pc7/p->tsc);
+                fprintf(stderr, " %5.2f", 100.0 * p->pc7/p->tsc);
         if (extra_msr_offset)
                 fprintf(stderr, "  0x%016llx", p->extra_msr);
         putc('\n', stderr);
diff --git a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
index 2618ef2ba31f..33c5c7ee148f 100644
--- a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
+++ b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
@@ -137,7 +137,6 @@ void cmdline(int argc, char **argv)
 void validate_cpuid(void)
 {
         unsigned int eax, ebx, ecx, edx, max_level;
-        char brand[16];
         unsigned int fms, family, model, stepping;
 
         eax = ebx = ecx = edx = 0;
@@ -160,8 +159,8 @@ void validate_cpuid(void)
                 model += ((fms >> 16) & 0xf) << 4;
 
         if (verbose > 1)
-                printf("CPUID %s %d levels family:model:stepping "
-                        "0x%x:%x:%x (%d:%d:%d)\n", brand, max_level,
+                printf("CPUID %d levels family:model:stepping "
+                        "0x%x:%x:%x (%d:%d:%d)\n", max_level,
                         family, model, stepping, family, model, stepping);
 
         if (!(edx & (1 << 5))) {