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+                ftrace - Function Tracer
+                ========================
+Copyright 2008 Red Hat Inc.
+Author: Steven Rostedt <srostedt@redhat.com>
+Introduction
+------------
+Ftrace is an internal tracer designed to help out developers and
+designers of systems to find what is going on inside the kernel.
+It can be used for debugging or analyzing latencies and performance
+issues that take place outside of user-space.
+Although ftrace is the function tracer, it also includes an
+infrastructure that allows for other types of tracing. Some of the
+tracers that are currently in ftrace is a tracer to trace
+context switches, the time it takes for a high priority task to
+run after it was woken up, the time interrupts are disabled, and
+more.
+The File System
+---------------
+Ftrace uses the debugfs file system to hold the control files as well
+as the files to display output.
+To mount the debugfs system:
+  # mkdir /debug
+  # mount -t debugfs nodev /debug
+That's it! (assuming that you have ftrace configured into your kernel)
+After mounting the debugfs, you can see a directory called
+"tracing".  This directory contains the control and output files
+of ftrace. Here is a list of some of the key files:
+ Note: all time values are in microseconds.
+  current_tracer : This is used to set or display the current tracer
+                that is configured.
+  available_tracers : This holds the different types of tracers that
+                has been compiled into the kernel. The tracers
+                listed here can be configured by echoing in their
+                name into current_tracer.
+  tracing_enabled : This sets or displays whether the current_tracer
+                is activated and tracing or not. Echo 0 into this
+                file to disable the tracer or 1 (or non-zero) to
+                enable it.
+  trace : This file holds the output of the trace in a human readable
+                format.
+  latency_trace : This file shows the same trace but the information
+                is organized more to display possible latencies
+                in the system.
+  trace_pipe : The output is the same as the "trace" file but this
+                file is meant to be streamed with live tracing.
+                Reads from this file will block until new data
+                is retrieved. Unlike the "trace" and "latency_trace"
+                files, this file is a consumer. This means reading
+                from this file causes sequential reads to display
+                more current data. Once data is read from this
+                file, it is consumed, and will not be read
+                again with a sequential read. The "trace" and
+                "latency_trace" files are static, and if the
+                tracer isn't adding more data, they will display
+                the same information every time they are read.
+  iter_ctrl : This file lets the user control the amount of data
+                that is displayed in one of the above output
+                files.
+  trace_max_latency : Some of the tracers record the max latency.
+                For example, the time interrupts are disabled.
+                This time is saved in this file. The max trace
+                will also be stored, and displayed by either
+                "trace" or "latency_trace".  A new max trace will
+                only be recorded if the latency is greater than
+                the value in this file. (in microseconds)
+  trace_entries : This sets or displays the number of trace
+                entries each CPU buffer can hold. The tracer buffers
+                are the same size for each CPU, so care must be
+                taken when modifying the trace_entries. The number
+                of actually entries will be the number given
+                times the number of possible CPUS. The buffers
+                are saved as individual pages, and the actual entries
+                will always be rounded up to entries per page.
+                This can only be updated when the current_tracer
+                is set to "none".
+                NOTE: It is planned on changing the allocated buffers
+                      from being the number of possible CPUS to
+                      the number of online CPUS.
+  tracing_cpumask : This is a mask that lets the user only trace
+                on specified CPUS. The format is a hex string
+                representing the CPUS.
+  set_ftrace_filter : When dynamic ftrace is configured in, the
+                code is dynamically modified to disable calling
+                of the function profiler (mcount). This lets
+                tracing be configured in with practically no overhead
+                in performance.  This also has a side effect of
+                enabling or disabling specific functions to be
+                traced.  Echoing in names of functions into this
+                file will limit the trace to only those files.
+  set_ftrace_notrace: This has the opposite effect that
+                set_ftrace_filter has. Any function that is added
+                here will not be traced. If a function exists
+                in both set_ftrace_filter and set_ftrace_notrace
+                the function will _not_ bet traced.
+  available_filter_functions : When a function is encountered the first
+                time by the dynamic tracer, it is recorded and
+                later the call is converted into a nop. This file
+                lists the functions that have been recorded
+                by the dynamic tracer and these functions can
+                be used to set the ftrace filter by the above
+                "set_ftrace_filter" file.
+The Tracers
+-----------
+Here are the list of current tracers that can be configured.
+  ftrace - function tracer that uses mcount to trace all functions.
+                It is possible to filter out which functions that are
+                traced when dynamic ftrace is configured in.
+  sched_switch - traces the context switches between tasks.
+  irqsoff - traces the areas that disable interrupts and saves off
+                the trace with the longest max latency.
+                See tracing_max_latency.  When a new max is recorded,
+                it replaces the old trace. It is best to view this
+                trace with the latency_trace file.
+  preemptoff - Similar to irqsoff but traces and records the time
+                preemption is disabled.
+  preemptirqsoff - Similar to irqsoff and preemptoff, but traces and
+                 records the largest time irqs and/or preemption is
+                 disabled.
+  wakeup - Traces and records the max latency that it takes for
+                the highest priority task to get scheduled after
+                it has been woken up.
+  none - This is not a tracer. To remove all tracers from tracing
+                simply echo "none" into current_tracer.
+Examples of using the tracer
+----------------------------
+Here are typical examples of using the tracers with only controlling
+them with the debugfs interface (without using any user-land utilities).
+Output format:
+--------------
+Here's an example of the output format of the file "trace"
+                             --------
+# tracer: ftrace
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+            bash-4251  [01] 10152.583854: path_put <-path_walk
+            bash-4251  [01] 10152.583855: dput <-path_put
+            bash-4251  [01] 10152.583855: _atomic_dec_and_lock <-dput
+                             --------
+A header is printed with the trace that is represented. In this case
+the tracer is "ftrace". Then a header showing the format. Task name
+"bash", the task PID "4251", the CPU that it was running on
+"01", the timestamp in <secs>.<usecs> format, the function name that was
+traced "path_put" and the parent function that called this function
+"path_walk".
+The sched_switch tracer also includes tracing of task wake ups and
+context switches.
+     ksoftirqd/1-7     [01]  1453.070013:      7:115:R   +  2916:115:S
+     ksoftirqd/1-7     [01]  1453.070013:      7:115:R   +    10:115:S
+     ksoftirqd/1-7     [01]  1453.070013:      7:115:R ==>    10:115:R
+        events/1-10    [01]  1453.070013:     10:115:S ==>  2916:115:R
+     kondemand/1-2916  [01]  1453.070013:   2916:115:S ==>     7:115:R
+     ksoftirqd/1-7     [01]  1453.070013:      7:115:S ==>     0:140:R
+Wake ups are represented by a "+" and the context switches show
+"==>".  The format is:
+ Context switches:
+       Previous task              Next Task
+  <pid>:<prio>:<state>  ==>  <pid>:<prio>:<state>
+ Wake ups:
+       Current task               Task waking up
+  <pid>:<prio>:<state>    +  <pid>:<prio>:<state>
+The prio is the internal kernel priority, which is inverse to the
+priority that is usually displayed by user-space tools. Zero represents
+the highest priority (99). Prio 100 starts the "nice" priorities with
+100 being equal to nice -20 and 139 being nice 19. The prio "140" is
+reserved for the idle task which is the lowest priority thread (pid 0).
+Latency trace format
+--------------------
+For traces that display latency times, the latency_trace file gives
+a bit more information to see why a latency happened. Here's a typical
+trace.
+# tracer: irqsoff
+#
+irqsoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 97 us, #3/3, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: swapper-0 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: apic_timer_interrupt
+ => ended at:   do_softirq
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+  <idle>-0     0d..1    0us+: trace_hardirqs_off_thunk (apic_timer_interrupt)
+  <idle>-0     0d.s.   97us : __do_softirq (do_softirq)
+  <idle>-0     0d.s1   98us : trace_hardirqs_on (do_softirq)
+vim:ft=help
+This shows that the current tracer is "irqsoff" tracing the time
+interrupts are disabled. It gives the trace version and the kernel
+this was executed on (2.6.26-rc8). Then it displays the max latency
+in microsecs (97 us). The number of trace entries displayed
+by the total number recorded (both are three: #3/3). The type of
+preemption that was used (PREEMPT). VP, KP, SP, and HP are always zero
+and reserved for later use. #P is the number of online CPUS (#P:2).
+The task is the process that was running when the latency happened.
+(swapper pid: 0).
+The start and stop that caused the latencies:
+  apic_timer_interrupt is where the interrupts were disabled.
+  do_softirq is where they were enabled again.
+The next lines after the header are the trace itself. The header
+explains which is which.
+  cmd: The name of the process in the trace.
+  pid: The PID of that process.
+  CPU#: The CPU that the process was running on.
+  irqs-off: 'd' interrupts are disabled. '.' otherwise.
+  need-resched: 'N' task need_resched is set, '.' otherwise.
+  hardirq/softirq:
+        'H' - hard irq happened inside a softirq.
+        'h' - hard irq is running
+        's' - soft irq is running
+        '.' - normal context.
+  preempt-depth: The level of preempt_disabled
+The above is mostly meaningful for kernel developers.
+  time: This differs from the trace output where as the trace output
+        contained a absolute timestamp. This timestamp is relative
+        to the start of the first entry in the the trace.
+  delay: This is just to help catch your eye a bit better. And
+        needs to be fixed to be only relative to the same CPU.
+        The marks is determined by the difference between this
+        current trace and the next trace.
+         '!' - greater than preempt_mark_thresh (default 100)
+         '+' - greater than 1 microsecond
+         ' ' - less than or equal to 1 microsecond.
+  The rest is the same as the 'trace' file.
+iter_ctrl
+---------
+The iter_ctrl file is used to control what gets printed in the trace
+output. To see what is available, simply cat the file:
+  cat /debug/tracing/iter_ctrl
+  print-parent nosym-offset nosym-addr noverbose noraw nohex nobin \
+ noblock nostacktrace nosched-tree
+To disable one of the options, echo in the option appended with "no".
+  echo noprint-parent > /debug/tracing/iter_ctrl
+To enable an option, leave off the "no".
+  echo sym-offest > /debug/tracing/iter_ctrl
+Here are the available options:
+  print-parent - On function traces, display the calling function
+                as well as the function being traced.
+  print-parent:
+   bash-4000  [01]  1477.606694: simple_strtoul <-strict_strtoul
+  noprint-parent:
+   bash-4000  [01]  1477.606694: simple_strtoul
+  sym-offset - Display not only the function name, but also the offset
+                in the function. For example, instead of seeing just
+                "ktime_get" you will see "ktime_get+0xb/0x20"
+  sym-offset:
+   bash-4000  [01]  1477.606694: simple_strtoul+0x6/0xa0
+  sym-addr - this will also display the function address as well as
+                the function name.
+  sym-addr:
+   bash-4000  [01]  1477.606694: simple_strtoul <c0339346>
+  verbose - This deals with the latency_trace file.
+    bash  4000 1 0 00000000 00010a95 [58127d26] 1720.415ms \
+    (+0.000ms): simple_strtoul (strict_strtoul)
+  raw - This will display raw numbers. This option is best for use with
+        user applications that can translate the raw numbers better than
+        having it done in the kernel.
+  hex - similar to raw, but the numbers will be in a hexadecimal format.
+  bin - This will print out the formats in raw binary.
+  block - TBD (needs update)
+  stacktrace - This is one of the options that changes the trace itself.
+                When a trace is recorded, so is the stack of functions.
+                This allows for back traces of trace sites.
+  sched-tree - TBD (any users??)
+sched_switch
+------------
+This tracer simply records schedule switches. Here's an example
+on how to implement it.
+ # echo sched_switch > /debug/tracing/current_tracer
+ # echo 1 > /debug/tracing/tracing_enabled
+ # sleep 1
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/trace
+# tracer: sched_switch
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+            bash-3997  [01]   240.132281:   3997:120:R   +  4055:120:R
+            bash-3997  [01]   240.132284:   3997:120:R ==>  4055:120:R
+           sleep-4055  [01]   240.132371:   4055:120:S ==>  3997:120:R
+            bash-3997  [01]   240.132454:   3997:120:R   +  4055:120:S
+            bash-3997  [01]   240.132457:   3997:120:R ==>  4055:120:R
+           sleep-4055  [01]   240.132460:   4055:120:D ==>  3997:120:R
+            bash-3997  [01]   240.132463:   3997:120:R   +  4055:120:D
+            bash-3997  [01]   240.132465:   3997:120:R ==>  4055:120:R
+          <idle>-0     [00]   240.132589:      0:140:R   +     4:115:S
+          <idle>-0     [00]   240.132591:      0:140:R ==>     4:115:R
+     ksoftirqd/0-4     [00]   240.132595:      4:115:S ==>     0:140:R
+          <idle>-0     [00]   240.132598:      0:140:R   +     4:115:S
+          <idle>-0     [00]   240.132599:      0:140:R ==>     4:115:R
+     ksoftirqd/0-4     [00]   240.132603:      4:115:S ==>     0:140:R
+           sleep-4055  [01]   240.133058:   4055:120:S ==>  3997:120:R
+ [...]
+As we have discussed previously about this format, the header shows
+the name of the trace and points to the options. The "FUNCTION"
+is a misnomer since here it represents the wake ups and context
+switches.
+The sched_switch only lists the wake ups (represented with '+')
+and context switches ('==>') with the previous task or current
+first followed by the next task or task waking up. The format for both
+of these is PID:KERNEL-PRIO:TASK-STATE. Remember that the KERNEL-PRIO
+is the inverse of the actual priority with zero (0) being the highest
+priority and the nice values starting at 100 (nice -20). Below is
+a quick chart to map the kernel priority to user land priorities.
+  Kernel priority: 0 to 99    ==> user RT priority 99 to 0
+  Kernel priority: 100 to 139 ==> user nice -20 to 19
+  Kernel priority: 140        ==> idle task priority
+The task states are:
+ R - running : wants to run, may not actually be running
+ S - sleep   : process is waiting to be woken up (handles signals)
+ D - deep sleep : process must be woken up (ignores signals)
+ T - stopped : process suspended
+ t - traced  : process is being traced (with something like gdb)
+ Z - zombie  : process waiting to be cleaned up
+ X - unknown
+ftrace_enabled
+--------------
+The following tracers give different output depending on whether
+or not the sysctl ftrace_enabled is set. To set ftrace_enabled,
+one can either use the sysctl function or set it via the proc
+file system interface.
+  sysctl kernel.ftrace_enabled=1
+ or
+  echo 1 > /proc/sys/kernel/ftrace_enabled
+To disable ftrace_enabled simply replace the '1' with '0' in
+the above commands.
+When ftrace_enabled is set the tracers will also record the functions
+that are within the trace. The descriptions of the tracers
+will also show an example with ftrace enabled.
+irqsoff
+-------
+When interrupts are disabled, the CPU can not react to any other
+external event (besides NMIs and SMIs). This prevents the timer
+interrupt from triggering or the mouse interrupt from letting the
+kernel know of a new mouse event. The result is a latency with the
+reaction time.
+The irqsoff tracer tracks the time interrupts are disabled and when
+they are re-enabled. When a new maximum latency is hit, it saves off
+the trace so that it may be retrieved at a later time. Every time a
+new maximum in reached, the old saved trace is discarded and the new
+trace is saved.
+To reset the maximum, echo 0 into tracing_max_latency. Here's an
+example:
+ # echo irqsoff > /debug/tracing/current_tracer
+ # echo 0 > /debug/tracing/tracing_max_latency
+ # echo 1 > /debug/tracing/tracing_enabled
+ # ls -ltr
+ [...]
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/latency_trace
+# tracer: irqsoff
+#
+irqsoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 6 us, #3/3, CPU#1 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: bash-4269 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: copy_page_range
+ => ended at:   copy_page_range
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+    bash-4269  1...1    0us+: _spin_lock (copy_page_range)
+    bash-4269  1...1    7us : _spin_unlock (copy_page_range)
+    bash-4269  1...2    7us : trace_preempt_on (copy_page_range)
+vim:ft=help
+Here we see that that we had a latency of 6 microsecs (which is
+very good). The spin_lock in copy_page_range disabled interrupts.
+The difference between the 6 and the displayed timestamp 7us is
+because the clock must have incremented between the time of recording
+the max latency and recording the function that had that latency.
+Note the above had ftrace_enabled not set. If we set the ftrace_enabled
+we get a much larger output:
+# tracer: irqsoff
+#
+irqsoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 50 us, #101/101, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: ls-4339 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: __alloc_pages_internal
+ => ended at:   __alloc_pages_internal
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+      ls-4339  0...1    0us+: get_page_from_freelist (__alloc_pages_internal)
+      ls-4339  0d..1    3us : rmqueue_bulk (get_page_from_freelist)
+      ls-4339  0d..1    3us : _spin_lock (rmqueue_bulk)
+      ls-4339  0d..1    4us : add_preempt_count (_spin_lock)
+      ls-4339  0d..2    4us : __rmqueue (rmqueue_bulk)
+      ls-4339  0d..2    5us : __rmqueue_smallest (__rmqueue)
+      ls-4339  0d..2    5us : __mod_zone_page_state (__rmqueue_smallest)
+      ls-4339  0d..2    6us : __rmqueue (rmqueue_bulk)
+      ls-4339  0d..2    6us : __rmqueue_smallest (__rmqueue)
+      ls-4339  0d..2    7us : __mod_zone_page_state (__rmqueue_smallest)
+      ls-4339  0d..2    7us : __rmqueue (rmqueue_bulk)
+      ls-4339  0d..2    8us : __rmqueue_smallest (__rmqueue)
+[...]
+      ls-4339  0d..2   46us : __rmqueue_smallest (__rmqueue)
+      ls-4339  0d..2   47us : __mod_zone_page_state (__rmqueue_smallest)
+      ls-4339  0d..2   47us : __rmqueue (rmqueue_bulk)
+      ls-4339  0d..2   48us : __rmqueue_smallest (__rmqueue)
+      ls-4339  0d..2   48us : __mod_zone_page_state (__rmqueue_smallest)
+      ls-4339  0d..2   49us : _spin_unlock (rmqueue_bulk)
+      ls-4339  0d..2   49us : sub_preempt_count (_spin_unlock)
+      ls-4339  0d..1   50us : get_page_from_freelist (__alloc_pages_internal)
+      ls-4339  0d..2   51us : trace_hardirqs_on (__alloc_pages_internal)
+vim:ft=help
+Here we traced a 50 microsecond latency. But we also see all the
+functions that were called during that time. Note that enabling
+function tracing we endure an added overhead. This overhead may
+extend the latency times. But never the less, this trace has provided
+some very helpful debugging.
+preemptoff
+----------
+When preemption is disabled we may be able to receive interrupts but
+the task can not be preempted and a higher priority task must wait
+for preemption to be enabled again before it can preempt a lower
+priority task.
+The preemptoff tracer traces the places that disables preemption.
+Like the irqsoff, it records the maximum latency that preemption
+was disabled. The control of preemptoff is much like the irqsoff.
+ # echo preemptoff > /debug/tracing/current_tracer
+ # echo 0 > /debug/tracing/tracing_max_latency
+ # echo 1 > /debug/tracing/tracing_enabled
+ # ls -ltr
+ [...]
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/latency_trace
+# tracer: preemptoff
+#
+preemptoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 29 us, #3/3, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: sshd-4261 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: do_IRQ
+ => ended at:   __do_softirq
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+    sshd-4261  0d.h.    0us+: irq_enter (do_IRQ)
+    sshd-4261  0d.s.   29us : _local_bh_enable (__do_softirq)
+    sshd-4261  0d.s1   30us : trace_preempt_on (__do_softirq)
+vim:ft=help
+This has some more changes. Preemption was disabled when an interrupt
+came in (notice the 'h'), and was enabled while doing a softirq.
+(notice the 's'). But we also see that interrupts have been disabled
+when entering the preempt off section and leaving it (the 'd').
+We do not know if interrupts were enabled in the mean time.
+# tracer: preemptoff
+#
+preemptoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 63 us, #87/87, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: sshd-4261 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: remove_wait_queue
+ => ended at:   __do_softirq
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+    sshd-4261  0d..1    0us : _spin_lock_irqsave (remove_wait_queue)
+    sshd-4261  0d..1    1us : _spin_unlock_irqrestore (remove_wait_queue)
+    sshd-4261  0d..1    2us : do_IRQ (common_interrupt)
+    sshd-4261  0d..1    2us : irq_enter (do_IRQ)
+    sshd-4261  0d..1    2us : idle_cpu (irq_enter)
+    sshd-4261  0d..1    3us : add_preempt_count (irq_enter)
+    sshd-4261  0d.h1    3us : idle_cpu (irq_enter)
+    sshd-4261  0d.h.    4us : handle_fasteoi_irq (do_IRQ)
+[...]
+    sshd-4261  0d.h.   12us : add_preempt_count (_spin_lock)
+    sshd-4261  0d.h1   12us : ack_ioapic_quirk_irq (handle_fasteoi_irq)
+    sshd-4261  0d.h1   13us : move_native_irq (ack_ioapic_quirk_irq)
+    sshd-4261  0d.h1   13us : _spin_unlock (handle_fasteoi_irq)
+    sshd-4261  0d.h1   14us : sub_preempt_count (_spin_unlock)
+    sshd-4261  0d.h1   14us : irq_exit (do_IRQ)
+    sshd-4261  0d.h1   15us : sub_preempt_count (irq_exit)
+    sshd-4261  0d..2   15us : do_softirq (irq_exit)
+    sshd-4261  0d...   15us : __do_softirq (do_softirq)
+    sshd-4261  0d...   16us : __local_bh_disable (__do_softirq)
+    sshd-4261  0d...   16us+: add_preempt_count (__local_bh_disable)
+    sshd-4261  0d.s4   20us : add_preempt_count (__local_bh_disable)
+    sshd-4261  0d.s4   21us : sub_preempt_count (local_bh_enable)
+    sshd-4261  0d.s5   21us : sub_preempt_count (local_bh_enable)
+[...]
+    sshd-4261  0d.s6   41us : add_preempt_count (__local_bh_disable)
+    sshd-4261  0d.s6   42us : sub_preempt_count (local_bh_enable)
+    sshd-4261  0d.s7   42us : sub_preempt_count (local_bh_enable)
+    sshd-4261  0d.s5   43us : add_preempt_count (__local_bh_disable)
+    sshd-4261  0d.s5   43us : sub_preempt_count (local_bh_enable_ip)
+    sshd-4261  0d.s6   44us : sub_preempt_count (local_bh_enable_ip)
+    sshd-4261  0d.s5   44us : add_preempt_count (__local_bh_disable)
+    sshd-4261  0d.s5   45us : sub_preempt_count (local_bh_enable)
+[...]
+    sshd-4261  0d.s.   63us : _local_bh_enable (__do_softirq)
+    sshd-4261  0d.s1   64us : trace_preempt_on (__do_softirq)
+The above is an example of the preemptoff trace with ftrace_enabled
+set. Here we see that interrupts were disabled the entire time.
+The irq_enter code lets us know that we entered an interrupt 'h'.
+Before that, the functions being traced still show that it is not
+in an interrupt, but we can see by the functions themselves that
+this is not the case.
+Notice that the __do_softirq when called doesn't have a preempt_count.
+It may seem that we missed a preempt enabled. What really happened
+is that the preempt count is held on the threads stack and we
+switched to the softirq stack (4K stacks in effect). The code
+does not copy the preempt count, but because interrupts are disabled
+we don't need to worry about it. Having a tracer like this is good
+to let people know what really happens inside the kernel.
+preemptirqsoff
+--------------
+Knowing the locations that have interrupts disabled or preemption
+disabled for the longest times is helpful. But sometimes we would
+like to know when either preemption and/or interrupts are disabled.
+The following code:
+    local_irq_disable();
+    call_function_with_irqs_off();
+    preempt_disable();
+    call_function_with_irqs_and_preemption_off();
+    local_irq_enable();
+    call_function_with_preemption_off();
+    preempt_enable();
+The irqsoff tracer will record the total length of
+call_function_with_irqs_off() and
+call_function_with_irqs_and_preemption_off().
+The preemptoff tracer will record the total length of
+call_function_with_irqs_and_preemption_off() and
+call_function_with_preemption_off().
+But neither will trace the time that interrupts and/or preemption
+is disabled. This total time is the time that we can not schedule.
+To record this time, use the preemptirqsoff tracer.
+Again, using this trace is much like the irqsoff and preemptoff tracers.
+ # echo preemptoff > /debug/tracing/current_tracer
+ # echo 0 > /debug/tracing/tracing_max_latency
+ # echo 1 > /debug/tracing/tracing_enabled
+ # ls -ltr
+ [...]
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/latency_trace
+# tracer: preemptirqsoff
+#
+preemptirqsoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 293 us, #3/3, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: ls-4860 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: apic_timer_interrupt
+ => ended at:   __do_softirq
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+      ls-4860  0d...    0us!: trace_hardirqs_off_thunk (apic_timer_interrupt)
+      ls-4860  0d.s.  294us : _local_bh_enable (__do_softirq)
+      ls-4860  0d.s1  294us : trace_preempt_on (__do_softirq)
+vim:ft=help
+The trace_hardirqs_off_thunk is called from assembly on x86 when
+interrupts are disabled in the assembly code. Without the function
+tracing, we don't know if interrupts were enabled within the preemption
+points. We do see that it started with preemption enabled.
+Here is a trace with ftrace_enabled set:
+# tracer: preemptirqsoff
+#
+preemptirqsoff latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 105 us, #183/183, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: sshd-4261 (uid:0 nice:0 policy:0 rt_prio:0)
+    -----------------
+ => started at: write_chan
+ => ended at:   __do_softirq
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+      ls-4473  0.N..    0us : preempt_schedule (write_chan)
+      ls-4473  0dN.1    1us : _spin_lock (schedule)
+      ls-4473  0dN.1    2us : add_preempt_count (_spin_lock)
+      ls-4473  0d..2    2us : put_prev_task_fair (schedule)
+[...]
+      ls-4473  0d..2   13us : set_normalized_timespec (ktime_get_ts)
+      ls-4473  0d..2   13us : __switch_to (schedule)
+    sshd-4261  0d..2   14us : finish_task_switch (schedule)
+    sshd-4261  0d..2   14us : _spin_unlock_irq (finish_task_switch)
+    sshd-4261  0d..1   15us : add_preempt_count (_spin_lock_irqsave)
+    sshd-4261  0d..2   16us : _spin_unlock_irqrestore (hrtick_set)
+    sshd-4261  0d..2   16us : do_IRQ (common_interrupt)
+    sshd-4261  0d..2   17us : irq_enter (do_IRQ)
+    sshd-4261  0d..2   17us : idle_cpu (irq_enter)
+    sshd-4261  0d..2   18us : add_preempt_count (irq_enter)
+    sshd-4261  0d.h2   18us : idle_cpu (irq_enter)
+    sshd-4261  0d.h.   18us : handle_fasteoi_irq (do_IRQ)
+    sshd-4261  0d.h.   19us : _spin_lock (handle_fasteoi_irq)
+    sshd-4261  0d.h.   19us : add_preempt_count (_spin_lock)
+    sshd-4261  0d.h1   20us : _spin_unlock (handle_fasteoi_irq)
+    sshd-4261  0d.h1   20us : sub_preempt_count (_spin_unlock)
+[...]
+    sshd-4261  0d.h1   28us : _spin_unlock (handle_fasteoi_irq)
+    sshd-4261  0d.h1   29us : sub_preempt_count (_spin_unlock)
+    sshd-4261  0d.h2   29us : irq_exit (do_IRQ)
+    sshd-4261  0d.h2   29us : sub_preempt_count (irq_exit)
+    sshd-4261  0d..3   30us : do_softirq (irq_exit)
+    sshd-4261  0d...   30us : __do_softirq (do_softirq)
+    sshd-4261  0d...   31us : __local_bh_disable (__do_softirq)
+    sshd-4261  0d...   31us+: add_preempt_count (__local_bh_disable)
+    sshd-4261  0d.s4   34us : add_preempt_count (__local_bh_disable)
+[...]
+    sshd-4261  0d.s3   43us : sub_preempt_count (local_bh_enable_ip)
+    sshd-4261  0d.s4   44us : sub_preempt_count (local_bh_enable_ip)
+    sshd-4261  0d.s3   44us : smp_apic_timer_interrupt (apic_timer_interrupt)
+    sshd-4261  0d.s3   45us : irq_enter (smp_apic_timer_interrupt)
+    sshd-4261  0d.s3   45us : idle_cpu (irq_enter)
+    sshd-4261  0d.s3   46us : add_preempt_count (irq_enter)
+    sshd-4261  0d.H3   46us : idle_cpu (irq_enter)
+    sshd-4261  0d.H3   47us : hrtimer_interrupt (smp_apic_timer_interrupt)
+    sshd-4261  0d.H3   47us : ktime_get (hrtimer_interrupt)
+[...]
+    sshd-4261  0d.H3   81us : tick_program_event (hrtimer_interrupt)
+    sshd-4261  0d.H3   82us : ktime_get (tick_program_event)
+    sshd-4261  0d.H3   82us : ktime_get_ts (ktime_get)
+    sshd-4261  0d.H3   83us : getnstimeofday (ktime_get_ts)
+    sshd-4261  0d.H3   83us : set_normalized_timespec (ktime_get_ts)
+    sshd-4261  0d.H3   84us : clockevents_program_event (tick_program_event)
+    sshd-4261  0d.H3   84us : lapic_next_event (clockevents_program_event)
+    sshd-4261  0d.H3   85us : irq_exit (smp_apic_timer_interrupt)
+    sshd-4261  0d.H3   85us : sub_preempt_count (irq_exit)
+    sshd-4261  0d.s4   86us : sub_preempt_count (irq_exit)
+    sshd-4261  0d.s3   86us : add_preempt_count (__local_bh_disable)
+[...]
+    sshd-4261  0d.s1   98us : sub_preempt_count (net_rx_action)
+    sshd-4261  0d.s.   99us : add_preempt_count (_spin_lock_irq)
+    sshd-4261  0d.s1   99us+: _spin_unlock_irq (run_timer_softirq)
+    sshd-4261  0d.s.  104us : _local_bh_enable (__do_softirq)
+    sshd-4261  0d.s.  104us : sub_preempt_count (_local_bh_enable)
+    sshd-4261  0d.s.  105us : _local_bh_enable (__do_softirq)
+    sshd-4261  0d.s1  105us : trace_preempt_on (__do_softirq)
+This is a very interesting trace. It started with the preemption of
+the ls task. We see that the task had the "need_resched" bit set
+with the 'N' in the trace.  Interrupts are disabled in the spin_lock
+and the trace started. We see that a schedule took place to run
+sshd.  When the interrupts were enabled we took an interrupt.
+On return of the interrupt the softirq ran. We took another interrupt
+while running the softirq as we see with the capital 'H'.
+wakeup
+------
+In Real-Time environment it is very important to know the wakeup
+time it takes for the highest priority task that wakes up to the
+time it executes. This is also known as "schedule latency".
+I stress the point that this is about RT tasks. It is also important
+to know the scheduling latency of non-RT tasks, but the average
+schedule latency is better for non-RT tasks. Tools like
+LatencyTop is more appropriate for such measurements.
+Real-Time environments is interested in the worst case latency.
+That is the longest latency it takes for something to happen, and
+not the average. We can have a very fast scheduler that may only
+have a large latency once in a while, but that would not work well
+with Real-Time tasks.  The wakeup tracer was designed to record
+the worst case wakeups of RT tasks. Non-RT tasks are not recorded
+because the tracer only records one worst case and tracing non-RT
+tasks that are unpredictable will overwrite the worst case latency
+of RT tasks.
+Since this tracer only deals with RT tasks, we will run this slightly
+different than we did with the previous tracers. Instead of performing
+an 'ls' we will run 'sleep 1' under 'chrt' which changes the
+priority of the task.
+ # echo wakeup > /debug/tracing/current_tracer
+ # echo 0 > /debug/tracing/tracing_max_latency
+ # echo 1 > /debug/tracing/tracing_enabled
+ # chrt -f 5 sleep 1
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/latency_trace
+# tracer: wakeup
+#
+wakeup latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 4 us, #2/2, CPU#1 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: sleep-4901 (uid:0 nice:0 policy:1 rt_prio:5)
+    -----------------
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+  <idle>-0     1d.h4    0us+: try_to_wake_up (wake_up_process)
+  <idle>-0     1d..4    4us : schedule (cpu_idle)
+vim:ft=help
+Running this on an idle system we see that it only took 4 microseconds
+to perform the task switch.  Note, since the trace marker in the
+schedule is before the actual "switch" we stop the tracing when
+the recorded task is about to schedule in. This may change if
+we add a new marker at the end of the scheduler.
+Notice that the recorded task is 'sleep' with the PID of 4901 and it
+has an rt_prio of 5. This priority is user-space priority and not
+the internal kernel priority. The policy is 1 for SCHED_FIFO and 2
+for SCHED_RR.
+Doing the same with chrt -r 5 and ftrace_enabled set.
+# tracer: wakeup
+#
+wakeup latency trace v1.1.5 on 2.6.26-rc8
+--------------------------------------------------------------------
+ latency: 50 us, #60/60, CPU#1 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
+    -----------------
+    | task: sleep-4068 (uid:0 nice:0 policy:2 rt_prio:5)
+    -----------------
+#                _------=> CPU#
+#               / _-----=> irqs-off
+#              | / _----=> need-resched
+#              || / _---=> hardirq/softirq
+#              ||| / _--=> preempt-depth
+#              |||| /
+#              |||||     delay
+#  cmd     pid ||||| time  |   caller
+#     \   /    |||||   \   |   /
+ksoftirq-7     1d.H3    0us : try_to_wake_up (wake_up_process)
+ksoftirq-7     1d.H4    1us : sub_preempt_count (marker_probe_cb)
+ksoftirq-7     1d.H3    2us : check_preempt_wakeup (try_to_wake_up)
+ksoftirq-7     1d.H3    3us : update_curr (check_preempt_wakeup)
+ksoftirq-7     1d.H3    4us : calc_delta_mine (update_curr)
+ksoftirq-7     1d.H3    5us : __resched_task (check_preempt_wakeup)
+ksoftirq-7     1d.H3    6us : task_wake_up_rt (try_to_wake_up)
+ksoftirq-7     1d.H3    7us : _spin_unlock_irqrestore (try_to_wake_up)
+[...]
+ksoftirq-7     1d.H2   17us : irq_exit (smp_apic_timer_interrupt)
+ksoftirq-7     1d.H2   18us : sub_preempt_count (irq_exit)
+ksoftirq-7     1d.s3   19us : sub_preempt_count (irq_exit)
+ksoftirq-7     1..s2   20us : rcu_process_callbacks (__do_softirq)
+[...]
+ksoftirq-7     1..s2   26us : __rcu_process_callbacks (rcu_process_callbacks)
+ksoftirq-7     1d.s2   27us : _local_bh_enable (__do_softirq)
+ksoftirq-7     1d.s2   28us : sub_preempt_count (_local_bh_enable)
+ksoftirq-7     1.N.3   29us : sub_preempt_count (ksoftirqd)
+ksoftirq-7     1.N.2   30us : _cond_resched (ksoftirqd)
+ksoftirq-7     1.N.2   31us : __cond_resched (_cond_resched)
+ksoftirq-7     1.N.2   32us : add_preempt_count (__cond_resched)
+ksoftirq-7     1.N.2   33us : schedule (__cond_resched)
+ksoftirq-7     1.N.2   33us : add_preempt_count (schedule)
+ksoftirq-7     1.N.3   34us : hrtick_clear (schedule)
+ksoftirq-7     1dN.3   35us : _spin_lock (schedule)
+ksoftirq-7     1dN.3   36us : add_preempt_count (_spin_lock)
+ksoftirq-7     1d..4   37us : put_prev_task_fair (schedule)
+ksoftirq-7     1d..4   38us : update_curr (put_prev_task_fair)
+[...]
+ksoftirq-7     1d..5   47us : _spin_trylock (tracing_record_cmdline)
+ksoftirq-7     1d..5   48us : add_preempt_count (_spin_trylock)
+ksoftirq-7     1d..6   49us : _spin_unlock (tracing_record_cmdline)
+ksoftirq-7     1d..6   49us : sub_preempt_count (_spin_unlock)
+ksoftirq-7     1d..4   50us : schedule (__cond_resched)
+The interrupt went off while running ksoftirqd. This task runs at
+SCHED_OTHER. Why didn't we see the 'N' set early? This may be
+a harmless bug with x86_32 and 4K stacks. The need_reched() function
+that tests if we need to reschedule looks on the actual stack.
+Where as the setting of the NEED_RESCHED bit happens on the
+task's stack. But because we are in a hard interrupt, the test
+is with the interrupts stack which has that to be false. We don't
+see the 'N' until we switch back to the task's stack.
+ftrace
+------
+ftrace is not only the name of the tracing infrastructure, but it
+is also a name of one of the tracers. The tracer is the function
+tracer. Enabling the function tracer can be done from the
+debug file system. Make sure the ftrace_enabled is set otherwise
+this tracer is a nop.
+ # sysctl kernel.ftrace_enabled=1
+ # echo ftrace > /debug/tracing/current_tracer
+ # echo 1 > /debug/tracing/tracing_enabled
+ # usleep 1
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/trace
+# tracer: ftrace
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+            bash-4003  [00]   123.638713: finish_task_switch <-schedule
+            bash-4003  [00]   123.638714: _spin_unlock_irq <-finish_task_switch
+            bash-4003  [00]   123.638714: sub_preempt_count <-_spin_unlock_irq
+            bash-4003  [00]   123.638715: hrtick_set <-schedule
+            bash-4003  [00]   123.638715: _spin_lock_irqsave <-hrtick_set
+            bash-4003  [00]   123.638716: add_preempt_count <-_spin_lock_irqsave
+            bash-4003  [00]   123.638716: _spin_unlock_irqrestore <-hrtick_set
+            bash-4003  [00]   123.638717: sub_preempt_count <-_spin_unlock_irqrestore
+            bash-4003  [00]   123.638717: hrtick_clear <-hrtick_set
+            bash-4003  [00]   123.638718: sub_preempt_count <-schedule
+            bash-4003  [00]   123.638718: sub_preempt_count <-preempt_schedule
+            bash-4003  [00]   123.638719: wait_for_completion <-__stop_machine_run
+            bash-4003  [00]   123.638719: wait_for_common <-wait_for_completion
+            bash-4003  [00]   123.638720: _spin_lock_irq <-wait_for_common
+            bash-4003  [00]   123.638720: add_preempt_count <-_spin_lock_irq
+[...]
+Note: It is sometimes better to enable or disable tracing directly from
+a program, because the buffer may be overflowed by the echo commands
+before you get to the point you want to trace. It is also easier to
+stop the tracing at the point that you hit the part that you are
+interested in. Since the ftrace buffer is a ring buffer with the
+oldest data being overwritten, usually it is sufficient to start the
+tracer with an echo command but have you code stop it. Something
+like the following is usually appropriate for this.
+int trace_fd;
+[...]
+int main(int argc, char *argv[]) {
+        [...]
+        trace_fd = open("/debug/tracing/tracing_enabled", O_WRONLY);
+        [...]
+        if (condition_hit()) {
+        write(trace_fd, "0", 1);
+        }
+        [...]
+}
+dynamic ftrace
+--------------
+If CONFIG_DYNAMIC_FTRACE is set, then the system will run with
+virtually no overhead when function tracing is disabled. The way
+this works is the mcount function call (placed at the start of
+every kernel function, produced by the -pg switch in gcc), starts
+of pointing to a simple return.
+When dynamic ftrace is initialized, it calls kstop_machine to make it
+act like a uniprocessor so that it can freely modify code without
+worrying about other processors executing that same code.  At
+initialization, the mcount calls are change to call a "record_ip"
+function.  After this, the first time a kernel function is called,
+it has the calling address saved in a hash table.
+Later on the ftraced kernel thread is awoken and will again call
+kstop_machine if new functions have been recorded. The ftraced thread
+will change all calls to mcount to "nop".  Just calling mcount
+and having mcount return has shown a 10% overhead. By converting
+it to a nop, there is no recordable overhead to the system.
+One special side-effect to the recording of the functions being
+traced, is that we can now selectively choose which functions we
+want to trace and which ones we want the mcount calls to remain as
+nops.
+Two files that contain to the enabling and disabling of recorded
+functions are:
+  set_ftrace_filter
+and
+  set_ftrace_notrace
+A list of available functions that you can add to this files is listed
+in:
+   available_filter_functions
+ # cat /debug/tracing/available_filter_functions
+put_prev_task_idle
+kmem_cache_create
+pick_next_task_rt
+get_online_cpus
+pick_next_task_fair
+mutex_lock
+[...]
+If I'm only interested in sys_nanosleep and hrtimer_interrupt:
+ # echo sys_nanosleep hrtimer_interrupt \
+                > /debug/tracing/set_ftrace_filter
+ # echo ftrace > /debug/tracing/current_tracer
+ # echo 1 > /debug/tracing/tracing_enabled
+ # usleep 1
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/trace
+# tracer: ftrace
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+          usleep-4134  [00]  1317.070017: hrtimer_interrupt <-smp_apic_timer_interrupt
+          usleep-4134  [00]  1317.070111: sys_nanosleep <-syscall_call
+          <idle>-0     [00]  1317.070115: hrtimer_interrupt <-smp_apic_timer_interrupt
+To see what functions are being traced, you can cat the file:
+ # cat /debug/tracing/set_ftrace_filter
+hrtimer_interrupt
+sys_nanosleep
+Perhaps this isn't enough. The filters also allow simple wild cards.
+Only the following is currently available
+  <match>*  - will match functions that begins with <match>
+  *<match>  - will match functions that end with <match>
+  *<match>* - will match functions that have <match> in it
+Thats all the wild cards that are allowed.
+  <match>*<match> will not work.
+ # echo hrtimer_* > /debug/tracing/set_ftrace_filter
+Produces:
+# tracer: ftrace
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+            bash-4003  [00]  1480.611794: hrtimer_init <-copy_process
+            bash-4003  [00]  1480.611941: hrtimer_start <-hrtick_set
+            bash-4003  [00]  1480.611956: hrtimer_cancel <-hrtick_clear
+            bash-4003  [00]  1480.611956: hrtimer_try_to_cancel <-hrtimer_cancel
+          <idle>-0     [00]  1480.612019: hrtimer_get_next_event <-get_next_timer_interrupt
+          <idle>-0     [00]  1480.612025: hrtimer_get_next_event <-get_next_timer_interrupt
+          <idle>-0     [00]  1480.612032: hrtimer_get_next_event <-get_next_timer_interrupt
+          <idle>-0     [00]  1480.612037: hrtimer_get_next_event <-get_next_timer_interrupt
+          <idle>-0     [00]  1480.612382: hrtimer_get_next_event <-get_next_timer_interrupt
+Notice that we lost the sys_nanosleep.
+ # cat /debug/tracing/set_ftrace_filter
+hrtimer_run_queues
+hrtimer_run_pending
+hrtimer_init
+hrtimer_cancel
+hrtimer_try_to_cancel
+hrtimer_forward
+hrtimer_start
+hrtimer_reprogram
+hrtimer_force_reprogram
+hrtimer_get_next_event
+hrtimer_interrupt
+hrtimer_nanosleep
+hrtimer_wakeup
+hrtimer_get_remaining
+hrtimer_get_res
+hrtimer_init_sleeper
+This is because the '>' and '>>' act just like they do in bash.
+To rewrite the filters, use '>'
+To append to the filters, use '>>'
+To clear out a filter so that all functions will be recorded again.
+ # echo > /debug/tracing/set_ftrace_filter
+ # cat /debug/tracing/set_ftrace_filter
+ #
+Again, now we want to append.
+ # echo sys_nanosleep > /debug/tracing/set_ftrace_filter
+ # cat /debug/tracing/set_ftrace_filter
+sys_nanosleep
+ # echo hrtimer_* >> /debug/tracing/set_ftrace_filter
+ # cat /debug/tracing/set_ftrace_filter
+hrtimer_run_queues
+hrtimer_run_pending
+hrtimer_init
+hrtimer_cancel
+hrtimer_try_to_cancel
+hrtimer_forward
+hrtimer_start
+hrtimer_reprogram
+hrtimer_force_reprogram
+hrtimer_get_next_event
+hrtimer_interrupt
+sys_nanosleep
+hrtimer_nanosleep
+hrtimer_wakeup
+hrtimer_get_remaining
+hrtimer_get_res
+hrtimer_init_sleeper
+The set_ftrace_notrace prevents those functions from being traced.
+ # echo '*preempt*' '*lock*' > /debug/tracing/set_ftrace_notrace
+Produces:
+# tracer: ftrace
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+            bash-4043  [01]   115.281644: finish_task_switch <-schedule
+            bash-4043  [01]   115.281645: hrtick_set <-schedule
+            bash-4043  [01]   115.281645: hrtick_clear <-hrtick_set
+            bash-4043  [01]   115.281646: wait_for_completion <-__stop_machine_run
+            bash-4043  [01]   115.281647: wait_for_common <-wait_for_completion
+            bash-4043  [01]   115.281647: kthread_stop <-stop_machine_run
+            bash-4043  [01]   115.281648: init_waitqueue_head <-kthread_stop
+            bash-4043  [01]   115.281648: wake_up_process <-kthread_stop
+            bash-4043  [01]   115.281649: try_to_wake_up <-wake_up_process
+We can see that there's no more lock or preempt tracing.
+ftraced
+-------
+As mentioned above, when dynamic ftrace is configured in, a kernel
+thread wakes up once a second and checks to see if there are mcount
+calls that need to be converted into nops. If there is not, then
+it simply goes back to sleep. But if there is, it will call
+kstop_machine to convert the calls to nops.
+There may be a case that you do not want this added latency.
+Perhaps you are doing some audio recording and this activity might
+cause skips in the playback. There is an interface to disable
+and enable the ftraced kernel thread.
+ # echo 0 > /debug/tracing/ftraced_enabled
+This will disable the calling of the kstop_machine to update the
+mcount calls to nops. Remember that there's a large overhead
+to calling mcount. Without this kernel thread, that overhead will
+exist.
+Any write to the ftraced_enabled file will cause the kstop_machine
+to run if there are recorded calls to mcount. This means that a
+user can manually perform the updates when they want to by simply
+echoing a '0' into the ftraced_enabled file.
+The updates are also done at the beginning of enabling a tracer
+that uses ftrace function recording.
+trace_pipe
+----------
+The trace_pipe outputs the same as trace, but the effect on the
+tracing is different. Every read from trace_pipe is consumed.
+This means that subsequent reads will be different. The trace
+is live.
+ # echo ftrace > /debug/tracing/current_tracer
+ # cat /debug/tracing/trace_pipe > /tmp/trace.out &
+[1] 4153
+ # echo 1 > /debug/tracing/tracing_enabled
+ # usleep 1
+ # echo 0 > /debug/tracing/tracing_enabled
+ # cat /debug/tracing/trace
+# tracer: ftrace
+#
+#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
+#              | |      |          |         |
+ #
+ # cat /tmp/trace.out
+            bash-4043  [00] 41.267106: finish_task_switch <-schedule
+            bash-4043  [00] 41.267106: hrtick_set <-schedule
+            bash-4043  [00] 41.267107: hrtick_clear <-hrtick_set
+            bash-4043  [00] 41.267108: wait_for_completion <-__stop_machine_run
+            bash-4043  [00] 41.267108: wait_for_common <-wait_for_completion
+            bash-4043  [00] 41.267109: kthread_stop <-stop_machine_run
+            bash-4043  [00] 41.267109: init_waitqueue_head <-kthread_stop
+            bash-4043  [00] 41.267110: wake_up_process <-kthread_stop
+            bash-4043  [00] 41.267110: try_to_wake_up <-wake_up_process
+            bash-4043  [00] 41.267111: select_task_rq_rt <-try_to_wake_up
+Note, reading the trace_pipe will block until more input is added.
+By changing the tracer, trace_pipe will issue an EOF. We needed
+to set the ftrace tracer _before_ cating the trace_pipe file.
+trace entries
+-------------
+Having too much or not enough data can be troublesome in diagnosing
+some issue in the kernel. The file trace_entries is used to modify
+the size of the internal trace buffers. The numbers listed
+is the number of entries that can be recorded per CPU. To know
+the full size, multiply the number of possible CPUS with the
+number of entries.
+ # cat /debug/tracing/trace_entries
+65620
+Note, to modify this you must have tracing fulling disabled. To do that,
+echo "none" into the current_tracer.
+ # echo none > /debug/tracing/current_tracer
+ # echo 100000 > /debug/tracing/trace_entries
+ # cat /debug/tracing/trace_entries
+100045
+Notice that we echoed in 100,000 but the size is 100,045. The entries
+are held by individual pages. It allocates the number of pages it takes
+to fulfill the request. If more entries may fit on the last page
+it will add them.
+ # echo 1 > /debug/tracing/trace_entries
+ # cat /debug/tracing/trace_entries
+85
+This shows us that 85 entries can fit on a single page.
+The number of pages that will be allocated is a percentage of available
+memory. Allocating too much will produces an error.
+ # echo 1000000000000 > /debug/tracing/trace_entries
+-bash: echo: write error: Cannot allocate memory
+ # cat /debug/tracing/trace_entries
+85
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 17f1f91af35c..946b66e1b652 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -148,9 +148,9 @@ tcp_available_congestion_control - STRING
        but not loaded.
 tcp_base_mss - INTEGER
-        The initial value of search_low to be used by Packetization Layer
+        The initial value of search_low to be used by the packetization layer
-        Path MTU Discovery (MTU probing).  If MTU probing is enabled,
+        Path MTU discovery (MTU probing).  If MTU probing is enabled,
-        this is the inital MSS used by the connection.
+        this is the initial MSS used by the connection.
 tcp_congestion_control - STRING
        Set the congestion control algorithm to be used for new
@@ -185,10 +185,9 @@ tcp_frto - INTEGER
        timeouts.  It is particularly beneficial in wireless environments
        where packet loss is typically due to random radio interference
        rather than intermediate router congestion.  F-RTO is sender-side
-        only modification.  Therefore it does not require any support from
+        only modification. Therefore it does not require any support from
-        the peer, but in a typical case, however, where wireless link is
+        the peer.
-        the local access link and most of the data flows downlink, the
-        faraway servers should have F-RTO enabled to take advantage of it.
        If set to 1, basic version is enabled.  2 enables SACK enhanced
        F-RTO if flow uses SACK.  The basic version can be used also when
        SACK is in use though scenario(s) with it exists where F-RTO
@@ -276,7 +275,7 @@ tcp_mem - vector of 3 INTEGERs: min, pressure, max
        memory.
 tcp_moderate_rcvbuf - BOOLEAN
-        If set, TCP performs receive buffer autotuning, attempting to
+        If set, TCP performs receive buffer auto-tuning, attempting to
        automatically size the buffer (no greater than tcp_rmem[2]) to
        match the size required by the path for full throughput.  Enabled by
        default.
@@ -336,7 +335,7 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
        pressure.
        Default: 8K
-        default: default size of receive buffer used by TCP sockets.
+        default: initial size of receive buffer used by TCP sockets.
        This value overrides net.core.rmem_default used by other protocols.
        Default: 87380 bytes. This value results in window of 65535 with
        default setting of tcp_adv_win_scale and tcp_app_win:0 and a bit
@@ -344,8 +343,10 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
        max: maximal size of receive buffer allowed for automatically
        selected receiver buffers for TCP socket. This value does not override
-        net.core.rmem_max, "static" selection via SO_RCVBUF does not use this.
+        net.core.rmem_max.  Calling setsockopt() with SO_RCVBUF disables
-        Default: 87380*2 bytes.
+        automatic tuning of that socket's receive buffer size, in which
+        case this value is ignored.
+        Default: between 87380B and 4MB, depending on RAM size.
 tcp_sack - BOOLEAN
        Enable select acknowledgments (SACKS).
@@ -358,7 +359,7 @@ tcp_slow_start_after_idle - BOOLEAN
        Default: 1
 tcp_stdurg - BOOLEAN
-        Use the Host requirements interpretation of the TCP urg pointer field.
+        Use the Host requirements interpretation of the TCP urgent pointer field.
        Most hosts use the older BSD interpretation, so if you turn this on
        Linux might not communicate correctly with them.
        Default: FALSE
@@ -371,12 +372,12 @@ tcp_synack_retries - INTEGER
 tcp_syncookies - BOOLEAN
        Only valid when the kernel was compiled with CONFIG_SYNCOOKIES
        Send out syncookies when the syn backlog queue of a socket
-        overflows. This is to prevent against the common 'syn flood attack'
+        overflows. This is to prevent against the common 'SYN flood attack'
        Default: FALSE
        Note, that syncookies is fallback facility.
        It MUST NOT be used to help highly loaded servers to stand
-        against legal connection rate. If you see synflood warnings
+        against legal connection rate. If you see SYN flood warnings
        in your logs, but investigation shows that they occur
        because of overload with legal connections, you should tune
        another parameters until this warning disappear.
@@ -386,7 +387,7 @@ tcp_syncookies - BOOLEAN
        to use TCP extensions, can result in serious degradation
        of some services (f.e. SMTP relaying), visible not by you,
        but your clients and relays, contacting you. While you see
-        synflood warnings in logs not being really flooded, your server
+        SYN flood warnings in logs not being really flooded, your server
        is seriously misconfigured.
 tcp_syn_retries - INTEGER
@@ -419,19 +420,21 @@ tcp_window_scaling - BOOLEAN
        Enable window scaling as defined in RFC1323.
 tcp_wmem - vector of 3 INTEGERs: min, default, max
-        min: Amount of memory reserved for send buffers for TCP socket.
+        min: Amount of memory reserved for send buffers for TCP sockets.
        Each TCP socket has rights to use it due to fact of its birth.
        Default: 4K
-        default: Amount of memory allowed for send buffers for TCP socket
+        default: initial size of send buffer used by TCP sockets.  This
-        by default. This value overrides net.core.wmem_default used
+        value overrides net.core.wmem_default used by other protocols.
-        by other protocols, it is usually lower than net.core.wmem_default.
+        It is usually lower than net.core.wmem_default.
        Default: 16K
-        max: Maximal amount of memory allowed for automatically selected
+        max: Maximal amount of memory allowed for automatically tuned
-        send buffers for TCP socket. This value does not override
+        send buffers for TCP sockets. This value does not override
-        net.core.wmem_max, "static" selection via SO_SNDBUF does not use this.
+        net.core.wmem_max.  Calling setsockopt() with SO_SNDBUF disables
-        Default: 128K
+        automatic tuning of that socket's send buffer size, in which case
+        this value is ignored.
+        Default: between 64K and 4MB, depending on RAM size.
 tcp_workaround_signed_windows - BOOLEAN
        If set, assume no receipt of a window scaling option means the
@@ -1060,24 +1063,193 @@ bridge-nf-filter-pppoe-tagged - BOOLEAN
        Default: 1
-UNDOCUMENTED:
+proc/sys/net/sctp/* Variables:
+addip_enable - BOOLEAN
+        Enable or disable extension of  Dynamic Address Reconfiguration
+        (ADD-IP) functionality specified in RFC5061.  This extension provides
+        the ability to dynamically add and remove new addresses for the SCTP
+        associations.
+        1: Enable extension.
+        0: Disable extension.
+        Default: 0
+addip_noauth_enable - BOOLEAN
+        Dynamic Address Reconfiguration (ADD-IP) requires the use of
+        authentication to protect the operations of adding or removing new
+        addresses.  This requirement is mandated so that unauthorized hosts
+        would not be able to hijack associations.  However, older
+        implementations may not have implemented this requirement while
+        allowing the ADD-IP extension.  For reasons of interoperability,
+        we provide this variable to control the enforcement of the
+        authentication requirement.
+        1: Allow ADD-IP extension to be used without authentication.  This
+           should only be set in a closed environment for interoperability
+           with older implementations.
+        0: Enforce the authentication requirement
+        Default: 0
+auth_enable - BOOLEAN
+        Enable or disable Authenticated Chunks extension.  This extension
+        provides the ability to send and receive authenticated chunks and is
+        required for secure operation of Dynamic Address Reconfiguration
+        (ADD-IP) extension.
+        1: Enable this extension.
+        0: Disable this extension.
+        Default: 0
+prsctp_enable - BOOLEAN
+        Enable or disable the Partial Reliability extension (RFC3758) which
+        is used to notify peers that a given DATA should no longer be expected.
+        1: Enable extension
+        0: Disable
+        Default: 1
+max_burst - INTEGER
+        The limit of the number of new packets that can be initially sent.  It
+        controls how bursty the generated traffic can be.
+        Default: 4
+association_max_retrans - INTEGER
+        Set the maximum number for retransmissions that an association can
+        attempt deciding that the remote end is unreachable.  If this value
+        is exceeded, the association is terminated.
+        Default: 10
+max_init_retransmits - INTEGER
+        The maximum number of retransmissions of INIT and COOKIE-ECHO chunks
+        that an association will attempt before declaring the destination
+        unreachable and terminating.
+        Default: 8
+path_max_retrans - INTEGER
+        The maximum number of retransmissions that will be attempted on a given
+        path.  Once this threshold is exceeded, the path is considered
+        unreachable, and new traffic will use a different path when the
+        association is multihomed.
+        Default: 5
+rto_initial - INTEGER
+        The initial round trip timeout value in milliseconds that will be used
+        in calculating round trip times.  This is the initial time interval
+        for retransmissions.
+        Default: 3000
-dev_weight FIXME
+rto_max - INTEGER
-discovery_slots FIXME
+        The maximum value (in milliseconds) of the round trip timeout.  This
-discovery_timeout FIXME
+        is the largest time interval that can elapse between retransmissions.
-fast_poll_increase FIXME
-ip6_queue_maxlen FIXME
+        Default: 60000
-lap_keepalive_time FIXME
-lo_cong FIXME
+rto_min - INTEGER
-max_baud_rate FIXME
+        The minimum value (in milliseconds) of the round trip timeout.  This
-max_dgram_qlen FIXME
+        is the smallest time interval the can elapse between retransmissions.
-max_noreply_time FIXME
-max_tx_data_size FIXME
+        Default: 1000
-max_tx_window FIXME
-min_tx_turn_time FIXME
+hb_interval - INTEGER
-mod_cong FIXME
+        The interval (in milliseconds) between HEARTBEAT chunks.  These chunks
-no_cong FIXME
+        are sent at the specified interval on idle paths to probe the state of
-no_cong_thresh FIXME
+        a given path between 2 associations.
-slot_timeout FIXME
-warn_noreply_time FIXME
+        Default: 30000
+sack_timeout - INTEGER
+        The amount of time (in milliseconds) that the implementation will wait
+        to send a SACK.
+        Default: 200
+valid_cookie_life - INTEGER
+        The default lifetime of the SCTP cookie (in milliseconds).  The cookie
+        is used during association establishment.
+        Default: 60000
+cookie_preserve_enable - BOOLEAN
+        Enable or disable the ability to extend the lifetime of the SCTP cookie
+        that is used during the establishment phase of SCTP association
+        1: Enable cookie lifetime extension.
+        0: Disable
+        Default: 1
+rcvbuf_policy - INTEGER
+        Determines if the receive buffer is attributed to the socket or to
+        association.   SCTP supports the capability to create multiple
+        associations on a single socket.  When using this capability, it is
+        possible that a single stalled association that's buffering a lot
+        of data may block other associations from delivering their data by
+        consuming all of the receive buffer space.  To work around this,
+        the rcvbuf_policy could be set to attribute the receiver buffer space
+        to each association instead of the socket.  This prevents the described
+        blocking.
+        1: rcvbuf space is per association
+        0: recbuf space is per socket
+        Default: 0
+sndbuf_policy - INTEGER
+        Similar to rcvbuf_policy above, this applies to send buffer space.
+        1: Send buffer is tracked per association
+        0: Send buffer is tracked per socket.
+        Default: 0
+sctp_mem - vector of 3 INTEGERs: min, pressure, max
+        Number of pages allowed for queueing by all SCTP sockets.
+        min: Below this number of pages SCTP is not bothered about its
+        memory appetite. When amount of memory allocated by SCTP exceeds
+        this number, SCTP starts to moderate memory usage.
+        pressure: This value was introduced to follow format of tcp_mem.
+        max: Number of pages allowed for queueing by all SCTP sockets.
+        Default is calculated at boot time from amount of available memory.
+sctp_rmem - vector of 3 INTEGERs: min, default, max
+        See tcp_rmem for a description.
+sctp_wmem  - vector of 3 INTEGERs: min, default, max
+        See tcp_wmem for a description.
+UNDOCUMENTED:
+/proc/sys/net/core/*
+        dev_weight FIXME
+/proc/sys/net/unix/*
+        max_dgram_qlen FIXME
+/proc/sys/net/irda/*
+        fast_poll_increase FIXME
+        warn_noreply_time FIXME
+        discovery_slots FIXME
+        slot_timeout FIXME
+        max_baud_rate FIXME
+        discovery_timeout FIXME
+        lap_keepalive_time FIXME
+        max_noreply_time FIXME
+        max_tx_data_size FIXME
+        max_tx_window FIXME
+        min_tx_turn_time FIXME
diff --git a/MAINTAINERS b/MAINTAINERS
index 6476125363e0..56a2f678019e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3082,8 +3082,8 @@ L:	linux-scsi@vger.kernel.org
 S:      Maintained
 OPROFILE
-P:      Philippe Elie
+P:      Robert Richter
-M:      phil.el@wanadoo.fr
+M:      robert.richter@amd.com
 L:      oprofile-list@lists.sf.net
 S:      Maintained
diff --git a/Makefile b/Makefile
index 6aff5f47c21d..6315424a00b9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 26
-EXTRAVERSION = -rc8
+EXTRAVERSION = -rc9
 NAME = Rotary Wombat
 # *DOCUMENTATION*
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c
index 76935e320214..27a5b466c85c 100644
--- a/arch/mips/mm/c-r3k.c
+++ b/arch/mips/mm/c-r3k.c
@@ -26,7 +26,7 @@
 static unsigned long icache_size, dcache_size;          /* Size in bytes */
 static unsigned long icache_lsize, dcache_lsize;        /* Size in bytes */
-unsigned long __init r3k_cache_size(unsigned long ca_flags)
+unsigned long __cpuinit r3k_cache_size(unsigned long ca_flags)
 {
        unsigned long flags, status, dummy, size;
        volatile unsigned long *p;
@@ -61,7 +61,7 @@ unsigned long __init r3k_cache_size(unsigned long ca_flags)
        return size * sizeof(*p);
 }
-unsigned long __init r3k_cache_lsize(unsigned long ca_flags)
+unsigned long __cpuinit r3k_cache_lsize(unsigned long ca_flags)
 {
        unsigned long flags, status, lsize, i;
        volatile unsigned long *p;
@@ -90,7 +90,7 @@ unsigned long __init r3k_cache_lsize(unsigned long ca_flags)
        return lsize * sizeof(*p);
 }
-static void __init r3k_probe_cache(void)
+static void __cpuinit r3k_probe_cache(void)
 {
        dcache_size = r3k_cache_size(ST0_ISC);
        if (dcache_size)
diff --git a/arch/mips/mm/page.c b/arch/mips/mm/page.c
index 1edf0cbbeede..1417c6494858 100644
--- a/arch/mips/mm/page.c
+++ b/arch/mips/mm/page.c
@@ -235,13 +235,12 @@ static void __cpuinit set_prefetch_parameters(void)
        }
        /*
         * Too much unrolling will overflow the available space in
-         * clear_space_array / copy_page_array. 8 words sounds generous,
+         * clear_space_array / copy_page_array.
-         * but a R4000 with 128 byte L2 line length can exceed even that.
         */
-        half_clear_loop_size = min(8 * clear_word_size,
+        half_clear_loop_size = min(16 * clear_word_size,
                                   max(cache_line_size >> 1,
                                       4 * clear_word_size));
-        half_copy_loop_size = min(8 * copy_word_size,
+        half_copy_loop_size = min(16 * copy_word_size,
                                  max(cache_line_size >> 1,
                                      4 * copy_word_size));
 }
@@ -263,21 +262,23 @@ static inline void __cpuinit build_clear_pref(u32 **buf, int off)
        if (pref_bias_clear_store) {
                uasm_i_pref(buf, pref_dst_mode, pref_bias_clear_store + off,
                            A0);
-        } else if (cpu_has_cache_cdex_s) {
+        } else if (cache_line_size == (half_clear_loop_size << 1)) {
-                uasm_i_cache(buf, Create_Dirty_Excl_SD, off, A0);
+                if (cpu_has_cache_cdex_s) {
-        } else if (cpu_has_cache_cdex_p) {
+                        uasm_i_cache(buf, Create_Dirty_Excl_SD, off, A0);
-                if (R4600_V1_HIT_CACHEOP_WAR && cpu_is_r4600_v1_x()) {
+                } else if (cpu_has_cache_cdex_p) {
-                        uasm_i_nop(buf);
+                        if (R4600_V1_HIT_CACHEOP_WAR && cpu_is_r4600_v1_x()) {
-                        uasm_i_nop(buf);
+                                uasm_i_nop(buf);
-                        uasm_i_nop(buf);
+                                uasm_i_nop(buf);
-                        uasm_i_nop(buf);
+                                uasm_i_nop(buf);
-                }
+                                uasm_i_nop(buf);
+                        }
-                if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
+                        if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
-                        uasm_i_lw(buf, ZERO, ZERO, AT);
+                                uasm_i_lw(buf, ZERO, ZERO, AT);
-                uasm_i_cache(buf, Create_Dirty_Excl_D, off, A0);
+                        uasm_i_cache(buf, Create_Dirty_Excl_D, off, A0);
-        }
+                }
+                }
 }
 void __cpuinit build_clear_page(void)
@@ -403,20 +404,22 @@ static inline void build_copy_store_pref(u32 **buf, int off)
        if (pref_bias_copy_store) {
                uasm_i_pref(buf, pref_dst_mode, pref_bias_copy_store + off,
                            A0);
-        } else if (cpu_has_cache_cdex_s) {
+        } else if (cache_line_size == (half_copy_loop_size << 1)) {
-                uasm_i_cache(buf, Create_Dirty_Excl_SD, off, A0);
+                if (cpu_has_cache_cdex_s) {
-        } else if (cpu_has_cache_cdex_p) {
+                        uasm_i_cache(buf, Create_Dirty_Excl_SD, off, A0);
-                if (R4600_V1_HIT_CACHEOP_WAR && cpu_is_r4600_v1_x()) {
+                } else if (cpu_has_cache_cdex_p) {
-                        uasm_i_nop(buf);
+                        if (R4600_V1_HIT_CACHEOP_WAR && cpu_is_r4600_v1_x()) {
-                        uasm_i_nop(buf);
+                                uasm_i_nop(buf);
-                        uasm_i_nop(buf);
+                                uasm_i_nop(buf);
-                        uasm_i_nop(buf);
+                                uasm_i_nop(buf);
-                }
+                                uasm_i_nop(buf);
+                        }
-                if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
+                        if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x())
-                        uasm_i_lw(buf, ZERO, ZERO, AT);
+                                uasm_i_lw(buf, ZERO, ZERO, AT);
-                uasm_i_cache(buf, Create_Dirty_Excl_D, off, A0);
+                        uasm_i_cache(buf, Create_Dirty_Excl_D, off, A0);
+                }
        }
 }
diff --git a/arch/mips/mm/sc-rm7k.c b/arch/mips/mm/sc-rm7k.c
index fc227f3b1199..e3abfb2d7e86 100644
--- a/arch/mips/mm/sc-rm7k.c
+++ b/arch/mips/mm/sc-rm7k.c
@@ -86,7 +86,7 @@ static void rm7k_sc_inv(unsigned long addr, unsigned long size)
 /*
 * This function is executed in uncached address space.
 */
-static __init void __rm7k_sc_enable(void)
+static __cpuinit void __rm7k_sc_enable(void)
 {
        int i;
@@ -107,7 +107,7 @@ static __init void __rm7k_sc_enable(void)
        }
 }
-static __init void rm7k_sc_enable(void)
+static __cpuinit void rm7k_sc_enable(void)
 {
        if (read_c0_config() & RM7K_CONF_SE)
                return;
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index cf37f5ca4b71..4d96e1db55ee 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -33,13 +33,14 @@ static struct legacy_serial_info {
        phys_addr_t                     taddr;
 } legacy_serial_infos[MAX_LEGACY_SERIAL_PORTS];
-static struct __initdata of_device_id parents[] = {
+static struct __initdata of_device_id legacy_serial_parents[] = {
        {.type = "soc",},
        {.type = "tsi-bridge",},
        {.type = "opb", },
        {.compatible = "ibm,opb",},
        {.compatible = "simple-bus",},
        {.compatible = "wrs,epld-localbus",},
+        {},
 };
 static unsigned int legacy_serial_count;
@@ -327,7 +328,7 @@ void __init find_legacy_serial_ports(void)
                struct device_node *parent = of_get_parent(np);
                if (!parent)
                        continue;
-                if (of_match_node(parents, parent) != NULL) {
+                if (of_match_node(legacy_serial_parents, parent) != NULL) {
                        index = add_legacy_soc_port(np, np);
                        if (index >= 0 && np == stdout)
                                legacy_serial_console = index;
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c
index e79ad8afda07..3f37a6e62771 100644
--- a/arch/powerpc/kernel/of_platform.c
+++ b/arch/powerpc/kernel/of_platform.c
@@ -76,6 +76,8 @@ struct of_device* of_platform_device_create(struct device_node *np,
                return NULL;
        dev->dma_mask = 0xffffffffUL;
+        dev->dev.coherent_dma_mask = DMA_32BIT_MASK;
        dev->dev.bus = &of_platform_bus_type;
        /* We do not fill the DMA ops for platform devices by default.
diff --git a/arch/um/Makefile b/arch/um/Makefile
index dbeab15e7bb7..ca40397017b9 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -77,7 +77,6 @@ include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
                         -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
 KBUILD_CFLAGS += $(KERNEL_DEFINES)
-KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
 PHONY += linux
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index 561e373bd850..302cbe504543 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -32,4 +32,11 @@ cflags-y += $(call cc-option,-mpreferred-stack-boundary=2)
 # an unresolved reference.
 cflags-y += -ffreestanding
+# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
+# a lot more stack due to the lack of sharing of stacklots.  Also, gcc
+# 4.3.0 needs -funit-at-a-time for extern inline functions.
+KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
+                        echo $(call cc-option,-fno-unit-at-a-time); \
+                        else echo $(call cc-option,-funit-at-a-time); fi ;)
 KBUILD_CFLAGS += $(cflags-y)
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index 8ed362f93582..a9cd7e77a7ab 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -21,3 +21,6 @@ HEADER_ARCH := x86
 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64
 LINK-y += -m64
+# Do unit-at-a-time unconditionally on x86_64, following the host
+KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
diff --git a/arch/x86/kernel/.gitignore b/arch/x86/kernel/.gitignore
index 4ea38a39aed4..08f4fd731469 100644
--- a/arch/x86/kernel/.gitignore
+++ b/arch/x86/kernel/.gitignore
@@ -1,2 +1,3 @@
 vsyscall.lds
 vsyscall_32.lds
+vmlinux.lds
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 940185ecaeda..6e64aaf00d1d 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -328,18 +328,18 @@ static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = {
 #endif
        {
                .callback = set_bf_sort,
-                .ident = "HP ProLiant DL360",
+                .ident = "HP ProLiant DL385 G2",
                .matches = {
                        DMI_MATCH(DMI_SYS_VENDOR, "HP"),
-                        DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
                },
        },
        {
                .callback = set_bf_sort,
-                .ident = "HP ProLiant DL380",
+                .ident = "HP ProLiant DL585 G2",
                .matches = {
                        DMI_MATCH(DMI_SYS_VENDOR, "HP"),
-                        DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
                },
        },
        {}
diff --git a/block/bsg.c b/block/bsg.c
index f0b7cd343216..54d617f7df3e 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -709,11 +709,12 @@ static void bsg_kref_release_function(struct kref *kref)
 {
        struct bsg_class_device *bcd =
                container_of(kref, struct bsg_class_device, ref);
+        struct device *parent = bcd->parent;
        if (bcd->release)
                bcd->release(bcd->parent);
-        put_device(bcd->parent);
+        put_device(parent);
 }
 static int bsg_put_device(struct bsg_device *bd)
diff --git a/crypto/chainiv.c b/crypto/chainiv.c
index 6da3f577e4db..9affadee3287 100644
--- a/crypto/chainiv.c
+++ b/crypto/chainiv.c
@@ -117,6 +117,7 @@ static int chainiv_init(struct crypto_tfm *tfm)
 static int async_chainiv_schedule_work(struct async_chainiv_ctx *ctx)
 {
        int queued;
+        int err = ctx->err;
        if (!ctx->queue.qlen) {
                smp_mb__before_clear_bit();
@@ -131,7 +132,7 @@ static int async_chainiv_schedule_work(struct async_chainiv_ctx *ctx)
        BUG_ON(!queued);
 out:
-        return ctx->err;
+        return err;
 }
 static int async_chainiv_postpone_request(struct skcipher_givcrypt_request *req)
@@ -227,6 +228,7 @@ static void async_chainiv_do_postponed(struct work_struct *work)
                                                     postponed);
        struct skcipher_givcrypt_request *req;
        struct ablkcipher_request *subreq;
+        int err;
        /* Only handle one request at a time to avoid hogging keventd. */
        spin_lock_bh(&ctx->lock);
@@ -241,7 +243,11 @@ static void async_chainiv_do_postponed(struct work_struct *work)
        subreq = skcipher_givcrypt_reqctx(req);
        subreq->base.flags |= CRYPTO_TFM_REQ_MAY_SLEEP;
-        async_chainiv_givencrypt_tail(req);
+        err = async_chainiv_givencrypt_tail(req);
+        local_bh_disable();
+        skcipher_givcrypt_complete(req, err);
+        local_bh_enable();
 }
 static int async_chainiv_init(struct crypto_tfm *tfm)
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 6beabc5abd07..e47f6e02133c 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -586,12 +586,6 @@ static void test_cipher(char *algo, int enc,
        j = 0;
        for (i = 0; i < tcount; i++) {
-                data = kzalloc(template[i].ilen, GFP_KERNEL);
-                if (!data)
-                        continue;
-                memcpy(data, template[i].input, template[i].ilen);
                if (template[i].iv)
                        memcpy(iv, template[i].iv, MAX_IVLEN);
                else
@@ -613,10 +607,8 @@ static void test_cipher(char *algo, int enc,
                                printk("setkey() failed flags=%x\n",
                                                crypto_ablkcipher_get_flags(tfm));
-                                if (!template[i].fail) {
+                                if (!template[i].fail)
-                                        kfree(data);
                                        goto out;
-                                }
                        }
                        temp = 0;
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 061817a3a0e5..5e6468a7ca4b 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1777,7 +1777,7 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
        struct ahci_host_priv *hpriv;
        unsigned int i, handled = 0;
        void __iomem *mmio;
-        u32 irq_stat;
+        u32 irq_stat, irq_masked;
        VPRINTK("ENTER\n");
@@ -1786,16 +1786,17 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
        /* sigh.  0xffffffff is a valid return from h/w */
        irq_stat = readl(mmio + HOST_IRQ_STAT);
-        irq_stat &= hpriv->port_map;
        if (!irq_stat)
                return IRQ_NONE;
+        irq_masked = irq_stat & hpriv->port_map;
        spin_lock(&host->lock);
        for (i = 0; i < host->n_ports; i++) {
                struct ata_port *ap;
-                if (!(irq_stat & (1 << i)))
+                if (!(irq_masked & (1 << i)))
                        continue;
                ap = host->ports[i];
@@ -1812,6 +1813,15 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
                handled = 1;
        }
+        /* HOST_IRQ_STAT behaves as level triggered latch meaning that
+         * it should be cleared after all the port events are cleared;
+         * otherwise, it will raise a spurious interrupt after each
+         * valid one.  Please read section 10.6.2 of ahci 1.1 for more
+         * information.
+         *
+         * Also, use the unmasked value to clear interrupt as spurious
+         * pending event on a dummy port might cause screaming IRQ.
+         */
        writel(irq_stat, mmio + HOST_IRQ_STAT);
        spin_unlock(&host->lock);
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 3ff8b14420d9..9330b7922f62 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -29,14 +29,16 @@
 enum {
        ATA_ACPI_FILTER_SETXFER = 1 << 0,
        ATA_ACPI_FILTER_LOCK    = 1 << 1,
+        ATA_ACPI_FILTER_DIPM    = 1 << 2,
        ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
-                                  ATA_ACPI_FILTER_LOCK,
+                                  ATA_ACPI_FILTER_LOCK |
+                                  ATA_ACPI_FILTER_DIPM,
 };
 static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
 module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
-MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)");
+MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM)");
 #define NO_PORT_MULT            0xffff
 #define SATA_ADR(root, pmp)     (((root) << 16) | (pmp))
@@ -195,6 +197,10 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
                /* This device does not support hotplug */
                return;
+        if (event == ACPI_NOTIFY_BUS_CHECK ||
+            event == ACPI_NOTIFY_DEVICE_CHECK)
+                status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
        spin_lock_irqsave(ap->lock, flags);
        switch (event) {
@@ -202,7 +208,6 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
        case ACPI_NOTIFY_DEVICE_CHECK:
                ata_ehi_push_desc(ehi, "ACPI event");
-                status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
                if (ACPI_FAILURE(status)) {
                        ata_port_printk(ap, KERN_ERR,
                                "acpi: failed to determine bay status (0x%x)\n",
@@ -690,6 +695,14 @@ static int ata_acpi_filter_tf(const struct ata_taskfile *tf,
                        return 1;
        }
+        if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_DIPM) {
+                /* inhibit enabling DIPM */
+                if (tf->command == ATA_CMD_SET_FEATURES &&
+                    tf->feature == SETFEATURES_SATA_ENABLE &&
+                    tf->nsect == SATA_DIPM)
+                        return 1;
+        }
        return 0;
 }
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index e82c66e8d31b..26345d7b531c 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -56,6 +56,7 @@ static const struct sis_laptop sis_laptop[] = {
        { 0x5513, 0x1043, 0x1107 },     /* ASUS A6K */
        { 0x5513, 0x1734, 0x105F },     /* FSC Amilo A1630 */
        { 0x5513, 0x1071, 0x8640 },     /* EasyNote K5305 */
+        { 0x5513, 0x1039, 0x5513 },     /* Targa Visionary 1000 */
        /* end marker */
        { 0, }
 };
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 1b9a87047817..0e6df289cb46 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -755,9 +755,8 @@ static ssize_t ipmi_write(struct file *file,
                rv = ipmi_heartbeat();
                if (rv)
                        return rv;
-                return 1;
        }
-        return 0;
+        return len;
 }
 static ssize_t ipmi_read(struct file *file,
diff --git a/drivers/char/pcmcia/ipwireless/hardware.c b/drivers/char/pcmcia/ipwireless/hardware.c
index ba6340ae98af..929101ecbae2 100644
--- a/drivers/char/pcmcia/ipwireless/hardware.c
+++ b/drivers/char/pcmcia/ipwireless/hardware.c
@@ -590,8 +590,10 @@ static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw,
                packet = kmalloc(sizeof(struct ipw_rx_packet) +
                                old_packet->length + minimum_free_space,
                                GFP_ATOMIC);
-                if (!packet)
+                if (!packet) {
+                        kfree(old_packet);
                        return NULL;
+                }
                memcpy(packet, old_packet,
                                sizeof(struct ipw_rx_packet)
                                        + old_packet->length);
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 5f80a9dff573..909cac93fa2a 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -678,12 +678,13 @@ static int rtc_do_ioctl(unsigned int cmd, unsigned long arg, int kernel)
                if (arg != (1<<tmp))
                        return -EINVAL;
+                rtc_freq = arg;
                spin_lock_irqsave(&rtc_lock, flags);
                if (hpet_set_periodic_freq(arg)) {
                        spin_unlock_irqrestore(&rtc_lock, flags);
                        return 0;
                }
-                rtc_freq = arg;
                val = CMOS_READ(RTC_FREQ_SELECT) & 0xf0;
                val |= (16 - tmp);
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 13a4bdd4e4d6..c7a977bc03e8 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -623,6 +623,7 @@ static struct pnp_device_id tpm_pnp_tbl[] __devinitdata = {
        {"IFX0102", 0},         /* Infineon */
        {"BCM0101", 0},         /* Broadcom */
        {"NSC1200", 0},         /* National */
+        {"ICO0102", 0},         /* Intel */
        /* Add new here */
        {"", 0},                /* User Specified */
        {"", 0}                 /* Terminator */
diff --git a/drivers/ide/arm/palm_bk3710.c b/drivers/ide/arm/palm_bk3710.c
index cc24803fadff..2f2b4f4cf229 100644
--- a/drivers/ide/arm/palm_bk3710.c
+++ b/drivers/ide/arm/palm_bk3710.c
@@ -76,7 +76,7 @@ struct palm_bk3710_udmatiming {
 #include "../ide-timing.h"
-static long ide_palm_clk;
+static unsigned ideclk_period; /* in nanoseconds */
 static const struct palm_bk3710_udmatiming palm_bk3710_udmatimings[6] = {
        {160, 240},             /* UDMA Mode 0 */
@@ -86,8 +86,6 @@ static const struct palm_bk3710_udmatiming palm_bk3710_udmatimings[6] = {
        {85,  60},              /* UDMA Mode 4 */
 };
-static struct clk *ideclkp;
 static void palm_bk3710_setudmamode(void __iomem *base, unsigned int dev,
                                    unsigned int mode)
 {
@@ -97,10 +95,10 @@ static void palm_bk3710_setudmamode(void __iomem *base, unsigned int dev,
        /* DMA Data Setup */
        t0 = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].cycletime,
-                          ide_palm_clk) - 1;
+                          ideclk_period) - 1;
-        tenv = DIV_ROUND_UP(20, ide_palm_clk) - 1;
+        tenv = DIV_ROUND_UP(20, ideclk_period) - 1;
        trp = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].rptime,
-                           ide_palm_clk) - 1;
+                           ideclk_period) - 1;
        /* udmatim Register */
        val16 = readw(base + BK3710_UDMATIM) & (dev ? 0xFF0F : 0xFFF0);
@@ -141,8 +139,8 @@ static void palm_bk3710_setdmamode(void __iomem *base, unsigned int dev,
        cycletime = max_t(int, t->cycle, min_cycle);
        /* DMA Data Setup */
-        t0 = DIV_ROUND_UP(cycletime, ide_palm_clk);
+        t0 = DIV_ROUND_UP(cycletime, ideclk_period);
-        td = DIV_ROUND_UP(t->active, ide_palm_clk);
+        td = DIV_ROUND_UP(t->active, ideclk_period);
        tkw = t0 - td - 1;
        td -= 1;
@@ -168,9 +166,9 @@ static void palm_bk3710_setpiomode(void __iomem *base, ide_drive_t *mate,
        struct ide_timing *t;
        /* PIO Data Setup */
-        t0 = DIV_ROUND_UP(cycletime, ide_palm_clk);
+        t0 = DIV_ROUND_UP(cycletime, ideclk_period);
        t2 = DIV_ROUND_UP(ide_timing_find_mode(XFER_PIO_0 + mode)->active,
-                          ide_palm_clk);
+                          ideclk_period);
        t2i = t0 - t2 - 1;
        t2 -= 1;
@@ -192,8 +190,8 @@ static void palm_bk3710_setpiomode(void __iomem *base, ide_drive_t *mate,
        /* TASKFILE Setup */
        t = ide_timing_find_mode(XFER_PIO_0 + mode);
-        t0 = DIV_ROUND_UP(t->cyc8b, ide_palm_clk);
+        t0 = DIV_ROUND_UP(t->cyc8b, ideclk_period);
-        t2 = DIV_ROUND_UP(t->act8b, ide_palm_clk);
+        t2 = DIV_ROUND_UP(t->act8b, ideclk_period);
        t2i = t0 - t2 - 1;
        t2 -= 1;
@@ -350,22 +348,22 @@ static const struct ide_port_info __devinitdata palm_bk3710_port_info = {
 static int __devinit palm_bk3710_probe(struct platform_device *pdev)
 {
-        struct clk *clkp;
+        struct clk *clk;
        struct resource *mem, *irq;
        ide_hwif_t *hwif;
-        unsigned long base;
+        unsigned long base, rate;
        int i;
        hw_regs_t hw;
        u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
-        clkp = clk_get(NULL, "IDECLK");
+        clk = clk_get(NULL, "IDECLK");
-        if (IS_ERR(clkp))
+        if (IS_ERR(clk))
                return -ENODEV;
-        ideclkp = clkp;
+        clk_enable(clk);
-        clk_enable(ideclkp);
+        rate = clk_get_rate(clk);
-        ide_palm_clk = clk_get_rate(ideclkp)/100000;
+        ideclk_period = 1000000000UL / rate;
-        ide_palm_clk = (10000/ide_palm_clk) + 1;
        /* Register the IDE interface with Linux ATA Interface */
        memset(&hw, 0, sizeof(hw));
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 380fa0c8cc84..26e68b65b7cf 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -646,8 +646,6 @@ static int ide_register_port(ide_hwif_t *hwif)
                goto out;
        }
-        get_device(&hwif->gendev);
        hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
                                              MKDEV(0, 0), hwif, hwif->name);
        if (IS_ERR(hwif->portdev)) {
@@ -1220,16 +1218,12 @@ static void drive_release_dev (struct device *dev)
        complete(&drive->gendev_rel_comp);
 }
-#ifndef ide_default_irq
-#define ide_default_irq(irq) 0
-#endif
 static int hwif_init(ide_hwif_t *hwif)
 {
        int old_irq;
        if (!hwif->irq) {
-                hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
+                hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
                if (!hwif->irq) {
                        printk("%s: DISABLED, NO IRQ\n", hwif->name);
                        return 0;
@@ -1259,7 +1253,7 @@ static int hwif_init(ide_hwif_t *hwif)
         *      It failed to initialise. Find the default IRQ for 
         *      this port and try that.
         */
-        hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
+        hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
        if (!hwif->irq) {
                printk("%s: Disabled unable to get IRQ %d.\n",
                        hwif->name, old_irq);
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index c758dcb13b14..300431d080a9 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -315,13 +315,14 @@ void ide_unregister(ide_hwif_t *hwif)
        BUG_ON(in_interrupt());
        BUG_ON(irqs_disabled());
        mutex_lock(&ide_cfg_mtx);
-        spin_lock_irq(&ide_lock);
-        if (!hwif->present)
-                goto abort;
-        __ide_port_unregister_devices(hwif);
-        hwif->present = 0;
+        spin_lock_irq(&ide_lock);
+        if (hwif->present) {
+                __ide_port_unregister_devices(hwif);
+                hwif->present = 0;
+        }
        spin_unlock_irq(&ide_lock);
        ide_proc_unregister_port(hwif);
@@ -351,16 +352,15 @@ void ide_unregister(ide_hwif_t *hwif)
        blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
        kfree(hwif->sg_table);
        unregister_blkdev(hwif->major, hwif->name);
-        spin_lock_irq(&ide_lock);
        if (hwif->dma_base)
                ide_release_dma_engine(hwif);
+        spin_lock_irq(&ide_lock);
        /* restore hwif data to pristine status */
        ide_init_port_data(hwif, hwif->index);
-abort:
        spin_unlock_irq(&ide_lock);
        mutex_unlock(&ide_cfg_mtx);
 }
@@ -1094,13 +1094,6 @@ struct bus_type ide_bus_type = {
 EXPORT_SYMBOL_GPL(ide_bus_type);
-static void ide_port_class_release(struct device *portdev)
-{
-        ide_hwif_t *hwif = dev_get_drvdata(portdev);
-        put_device(&hwif->gendev);
-}
 int ide_vlb_clk;
 EXPORT_SYMBOL_GPL(ide_vlb_clk);
@@ -1305,7 +1298,6 @@ static int __init ide_init(void)
                ret = PTR_ERR(ide_port_class);
                goto out_port_class;
        }
-        ide_port_class->dev_release = ide_port_class_release;
        init_ide_data();
diff --git a/drivers/ide/pci/it8213.c b/drivers/ide/pci/it8213.c
index 9053c8771e6e..2b71bdf74e73 100644
--- a/drivers/ide/pci/it8213.c
+++ b/drivers/ide/pci/it8213.c
@@ -184,8 +184,7 @@ static const struct ide_port_info it8213_chipsets[] __devinitdata = {
 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-        ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
+        return ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
-        return 0;
 }
 static const struct pci_device_id it8213_pci_tbl[] = {
diff --git a/drivers/ide/pci/ns87415.c b/drivers/ide/pci/ns87415.c
index fec4955f449b..a7a41bb82778 100644
--- a/drivers/ide/pci/ns87415.c
+++ b/drivers/ide/pci/ns87415.c
@@ -225,10 +225,6 @@ static int ns87415_dma_setup(ide_drive_t *drive)
        return 1;
 }
-#ifndef ide_default_irq
-#define ide_default_irq(irq) 0
-#endif
 static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
 {
        struct pci_dev *dev = to_pci_dev(hwif->dev);
@@ -288,7 +284,7 @@ static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
        }
        if (!using_inta)
-                hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
+                hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
        else if (!hwif->irq && hwif->mate && hwif->mate->irq)
                hwif->irq = hwif->mate->irq;    /* share IRQ with mate */
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index 8934178a23ee..95f82cfb6c54 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -1096,7 +1096,9 @@ static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr, ch
        struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
        PDBG("%s dev 0x%p\n", __func__, dev);
+        rtnl_lock();
        lldev->ethtool_ops->get_drvinfo(lldev, &info);
+        rtnl_unlock();
        return sprintf(buf, "%s\n", info.fw_version);
 }
@@ -1109,7 +1111,9 @@ static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
        struct net_device *lldev = iwch_dev->rdev.t3cdev_p->lldev;
        PDBG("%s dev 0x%p\n", __func__, dev);
+        rtnl_lock();
        lldev->ethtool_ops->get_drvinfo(lldev, &info);
+        rtnl_unlock();
        return sprintf(buf, "%s\n", info.driver);
 }
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index 0f3c66de69bc..8d8c6b736167 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -1977,8 +1977,10 @@ isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
        if (!skb)
                return -ENOMEM;
        skb_reserve(skb, hl);
-        if (copy_from_user(skb_put(skb, len), buf, len))
+        if (copy_from_user(skb_put(skb, len), buf, len)) {
+                dev_kfree_skb(skb);
                return -EFAULT;
+        }
        ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
        if (ret <= 0)
                dev_kfree_skb(skb);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 54c8ee28fcc4..3b27df52456b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2017,12 +2017,7 @@ static int __handle_issuing_new_read_requests5(struct stripe_head *sh,
                         */
                        s->uptodate++;
                        return 0; /* uptodate + compute == disks */
-                } else if ((s->uptodate < disks - 1) &&
+                } else if (test_bit(R5_Insync, &dev->flags)) {
-                        test_bit(R5_Insync, &dev->flags)) {
-                        /* Note: we hold off compute operations while checks are
-                         * in flight, but we still prefer 'compute' over 'read'
-                         * hence we only read if (uptodate < * disks-1)
-                         */
                        set_bit(R5_LOCKED, &dev->flags);
                        set_bit(R5_Wantread, &dev->flags);
                        if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
diff --git a/drivers/media/video/ov7670.c b/drivers/media/video/ov7670.c
index 2bc6bdc9c1f2..d7bfd30f74a9 100644
--- a/drivers/media/video/ov7670.c
+++ b/drivers/media/video/ov7670.c
@@ -406,8 +406,10 @@ static int ov7670_read(struct i2c_client *c, unsigned char reg,
        int ret;
        ret = i2c_smbus_read_byte_data(c, reg);
-        if (ret >= 0)
+        if (ret >= 0) {
                *value = (unsigned char) ret;
+                ret = 0;
+        }
        return ret;
 }
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index db3c892f87fb..d40d6d15ae20 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -1686,9 +1686,14 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
                ioc->bus_type = SAS;
        }
-        if (ioc->bus_type == SAS && mpt_msi_enable == -1)
+        if (mpt_msi_enable == -1) {
-                ioc->msi_enable = 1;
+                /* Enable on SAS, disable on FC and SPI */
-        else
+                if (ioc->bus_type == SAS)
+                        ioc->msi_enable = 1;
+                else
+                        ioc->msi_enable = 0;
+        } else
+                /* follow flag: 0 - disable; 1 - enable */
                ioc->msi_enable = mpt_msi_enable;
        if (ioc->errata_flag_1064)
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 25bcfcf36f2e..1effca4e40e1 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -1266,13 +1266,18 @@ mptspi_dv_renegotiate(struct _MPT_SCSI_HOST *hd)
 static int
 mptspi_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
 {
-        struct _MPT_SCSI_HOST *hd = shost_priv(ioc->sh);
        int rc;
        rc = mptscsih_ioc_reset(ioc, reset_phase);
-        if (reset_phase == MPT_IOC_POST_RESET)
+        /* only try to do a renegotiation if we're properly set up
+         * if we get an ioc fault on bringup, ioc->sh will be NULL */
+        if (reset_phase == MPT_IOC_POST_RESET &&
+            ioc->sh) {
+                struct _MPT_SCSI_HOST *hd = shost_priv(ioc->sh);
                mptspi_dv_renegotiate(hd);
+        }
        return rc;
 }
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index 65210fca37ed..d89475d36988 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -114,6 +114,7 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
        unsigned int nob = data->blocks;
        unsigned long long clks;
        unsigned int timeout;
+        bool dalgn = 0;
        u32 dcmd;
        int i;
@@ -152,6 +153,9 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
                host->sg_cpu[i].dcmd = dcmd | length;
                if (length & 31 && !(data->flags & MMC_DATA_READ))
                        host->sg_cpu[i].dcmd |= DCMD_ENDIRQEN;
+                /* Not aligned to 8-byte boundary? */
+                if (sg_dma_address(&data->sg[i]) & 0x7)
+                        dalgn = 1;
                if (data->flags & MMC_DATA_READ) {
                        host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO;
                        host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]);
@@ -165,6 +169,15 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
        host->sg_cpu[host->dma_len - 1].ddadr = DDADR_STOP;
        wmb();
+        /*
+         * The PXA27x DMA controller encounters overhead when working with
+         * unaligned (to 8-byte boundaries) data, so switch on byte alignment
+         * mode only if we have unaligned data.
+         */
+        if (dalgn)
+                DALGN |= (1 << host->dma);
+        else
+                DALGN &= (1 << host->dma);
        DDADR(host->dma) = host->sg_dma;
        DCSR(host->dma) = DCSR_RUN;
 }
diff --git a/drivers/net/ehea/ehea.h b/drivers/net/ehea/ehea.h
index fe872fbd671e..e01926b7b5b7 100644
--- a/drivers/net/ehea/ehea.h
+++ b/drivers/net/ehea/ehea.h
@@ -40,7 +40,7 @@
 #include <asm/io.h>
 #define DRV_NAME        "ehea"
-#define DRV_VERSION     "EHEA_0091"
+#define DRV_VERSION     "EHEA_0092"
 /* eHEA capability flags */
 #define DLPAR_PORT_ADD_REM 1
@@ -452,7 +452,7 @@ struct ehea_bcmc_reg_entry {
 struct ehea_bcmc_reg_array {
        struct ehea_bcmc_reg_entry *arr;
        int num_entries;
-        struct mutex lock;
+        spinlock_t lock;
 };
 #define EHEA_PORT_UP 1
@@ -478,6 +478,7 @@ struct ehea_port {
        int num_add_tx_qps;
        int num_mcs;
        int resets;
+        u64 flags;
        u64 mac_addr;
        u32 logical_port_id;
        u32 port_speed;
@@ -501,7 +502,8 @@ struct port_res_cfg {
 };
 enum ehea_flag_bits {
-        __EHEA_STOP_XFER
+        __EHEA_STOP_XFER,
+        __EHEA_DISABLE_PORT_RESET
 };
 void ehea_set_ethtool_ops(struct net_device *netdev);
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 075fd547421e..0920b796bd78 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -118,6 +118,7 @@ static struct of_device_id ehea_device_table[] = {
        },
        {},
 };
+MODULE_DEVICE_TABLE(of, ehea_device_table);
 static struct of_platform_driver ehea_driver = {
        .name = "ehea",
@@ -137,6 +138,12 @@ void ehea_dump(void *adr, int len, char *msg)
        }
 }
+void ehea_schedule_port_reset(struct ehea_port *port)
+{
+        if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
+                schedule_work(&port->reset_task);
+}
 static void ehea_update_firmware_handles(void)
 {
        struct ehea_fw_handle_entry *arr = NULL;
@@ -241,7 +248,7 @@ static void ehea_update_bcmc_registrations(void)
                }
        if (num_registrations) {
-                arr = kzalloc(num_registrations * sizeof(*arr), GFP_KERNEL);
+                arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
                if (!arr)
                        return;  /* Keep the existing array */
        } else
@@ -301,7 +308,7 @@ static struct net_device_stats *ehea_get_stats(struct net_device *dev)
        memset(stats, 0, sizeof(*stats));
-        cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
+        cb2 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
        if (!cb2) {
                ehea_error("no mem for cb2");
                goto out;
@@ -587,7 +594,7 @@ static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
                                   "Resetting port.", pr->qp->init_attr.qp_nr);
                        ehea_dump(cqe, sizeof(*cqe), "CQE");
                }
-                schedule_work(&pr->port->reset_task);
+                ehea_schedule_port_reset(pr->port);
                return 1;
        }
@@ -616,7 +623,7 @@ static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
        *tcph = tcp_hdr(skb);
        /* check if ip header and tcp header are complete */
-        if (iph->tot_len < ip_len + tcp_hdrlen(skb))
+        if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
                return -1;
        *hdr_flags = LRO_IPV4 | LRO_TCP;
@@ -765,7 +772,7 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
                        ehea_error("Send Completion Error: Resetting port");
                        if (netif_msg_tx_err(pr->port))
                                ehea_dump(cqe, sizeof(*cqe), "Send CQE");
-                        schedule_work(&pr->port->reset_task);
+                        ehea_schedule_port_reset(pr->port);
                        break;
                }
@@ -885,7 +892,7 @@ static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
                eqe = ehea_poll_eq(port->qp_eq);
        }
-        schedule_work(&port->reset_task);
+        ehea_schedule_port_reset(port);
        return IRQ_HANDLED;
 }
@@ -1763,7 +1770,7 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
        memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
-        mutex_lock(&ehea_bcmc_regs.lock);
+        spin_lock(&ehea_bcmc_regs.lock);
        /* Deregister old MAC in pHYP */
        if (port->state == EHEA_PORT_UP) {
@@ -1785,7 +1792,7 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
 out_upregs:
        ehea_update_bcmc_registrations();
-        mutex_unlock(&ehea_bcmc_regs.lock);
+        spin_unlock(&ehea_bcmc_regs.lock);
 out_free:
        kfree(cb0);
 out:
@@ -1947,7 +1954,7 @@ static void ehea_set_multicast_list(struct net_device *dev)
        }
        ehea_promiscuous(dev, 0);
-        mutex_lock(&ehea_bcmc_regs.lock);
+        spin_lock(&ehea_bcmc_regs.lock);
        if (dev->flags & IFF_ALLMULTI) {
                ehea_allmulti(dev, 1);
@@ -1978,7 +1985,7 @@ static void ehea_set_multicast_list(struct net_device *dev)
        }
 out:
        ehea_update_bcmc_registrations();
-        mutex_unlock(&ehea_bcmc_regs.lock);
+        spin_unlock(&ehea_bcmc_regs.lock);
        return;
 }
@@ -2497,7 +2504,7 @@ static int ehea_up(struct net_device *dev)
                }
        }
-        mutex_lock(&ehea_bcmc_regs.lock);
+        spin_lock(&ehea_bcmc_regs.lock);
        ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
        if (ret) {
@@ -2520,7 +2527,7 @@ out:
                ehea_info("Failed starting %s. ret=%i", dev->name, ret);
        ehea_update_bcmc_registrations();
-        mutex_unlock(&ehea_bcmc_regs.lock);
+        spin_unlock(&ehea_bcmc_regs.lock);
        ehea_update_firmware_handles();
        mutex_unlock(&ehea_fw_handles.lock);
@@ -2575,7 +2582,7 @@ static int ehea_down(struct net_device *dev)
        mutex_lock(&ehea_fw_handles.lock);
-        mutex_lock(&ehea_bcmc_regs.lock);
+        spin_lock(&ehea_bcmc_regs.lock);
        ehea_drop_multicast_list(dev);
        ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
@@ -2584,7 +2591,7 @@ static int ehea_down(struct net_device *dev)
        port->state = EHEA_PORT_DOWN;
        ehea_update_bcmc_registrations();
-        mutex_unlock(&ehea_bcmc_regs.lock);
+        spin_unlock(&ehea_bcmc_regs.lock);
        ret = ehea_clean_all_portres(port);
        if (ret)
@@ -2605,13 +2612,14 @@ static int ehea_stop(struct net_device *dev)
        if (netif_msg_ifdown(port))
                ehea_info("disabling port %s", dev->name);
+        set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
        cancel_work_sync(&port->reset_task);
        mutex_lock(&port->port_lock);
        netif_stop_queue(dev);
        port_napi_disable(port);
        ret = ehea_down(dev);
        mutex_unlock(&port->port_lock);
+        clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
        return ret;
 }
@@ -2941,7 +2949,7 @@ static void ehea_tx_watchdog(struct net_device *dev)
        if (netif_carrier_ok(dev) &&
            !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
-                schedule_work(&port->reset_task);
+                ehea_schedule_port_reset(port);
 }
 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
@@ -3590,7 +3598,7 @@ int __init ehea_module_init(void)
        memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
        mutex_init(&ehea_fw_handles.lock);
-        mutex_init(&ehea_bcmc_regs.lock);
+        spin_lock_init(&ehea_bcmc_regs.lock);
        ret = check_module_parm();
        if (ret)
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 2cb244763292..20d4fe96a81c 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -4194,12 +4194,23 @@ static int nv_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
        netif_carrier_off(dev);
        if (netif_running(dev)) {
+                unsigned long flags;
                nv_disable_irq(dev);
                netif_tx_lock_bh(dev);
-                spin_lock(&np->lock);
+                /* with plain spinlock lockdep complains */
+                spin_lock_irqsave(&np->lock, flags);
                /* stop engines */
+                /* FIXME:
+                 * this can take some time, and interrupts are disabled
+                 * due to spin_lock_irqsave, but let's hope no daemon
+                 * is going to change the settings very often...
+                 * Worst case:
+                 * NV_RXSTOP_DELAY1MAX + NV_TXSTOP_DELAY1MAX
+                 * + some minor delays, which is up to a second approximately
+                 */
                nv_stop_rxtx(dev);
-                spin_unlock(&np->lock);
+                spin_unlock_irqrestore(&np->lock, flags);
                netif_tx_unlock_bh(dev);
        }
diff --git a/drivers/net/fs_enet/mac-fcc.c b/drivers/net/fs_enet/mac-fcc.c
index e36321152d50..8268b3535b30 100644
--- a/drivers/net/fs_enet/mac-fcc.c
+++ b/drivers/net/fs_enet/mac-fcc.c
@@ -463,6 +463,9 @@ static void restart(struct net_device *dev)
        else
                C32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
+        /* Restore multicast and promiscuous settings */
+        set_multicast_list(dev);
        S32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
 }
diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c
index 5d2108c5ac7c..babc79ad490b 100644
--- a/drivers/net/ibm_newemac/core.c
+++ b/drivers/net/ibm_newemac/core.c
@@ -1636,6 +1636,12 @@ static int emac_poll_rx(void *param, int budget)
                        goto next;
                }
+                if (len < ETH_HLEN) {
+                        ++dev->estats.rx_dropped_stack;
+                        emac_recycle_rx_skb(dev, slot, len);
+                        goto next;
+                }
                if (len && len < EMAC_RX_COPY_THRESH) {
                        struct sk_buff *copy_skb =
                            alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
@@ -2719,6 +2725,8 @@ static int __devinit emac_probe(struct of_device *ofdev,
        /* Clean rings */
        memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
        memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
+        memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
+        memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
        /* Attach to ZMII, if needed */
        if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
diff --git a/drivers/net/irda/nsc-ircc.c b/drivers/net/irda/nsc-ircc.c
index a7714da7c283..effc1ce8179a 100644
--- a/drivers/net/irda/nsc-ircc.c
+++ b/drivers/net/irda/nsc-ircc.c
@@ -152,6 +152,7 @@ static chipio_t pnp_info;
 static const struct pnp_device_id nsc_ircc_pnp_table[] = {
        { .id = "NSC6001", .driver_data = 0 },
        { .id = "IBM0071", .driver_data = 0 },
+        { .id = "HWPC224", .driver_data = 0 },
        { }
 };
diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index 58e128784585..04ad3573b159 100644
--- a/drivers/net/irda/via-ircc.c
+++ b/drivers/net/irda/via-ircc.c
@@ -1546,6 +1546,7 @@ static int via_ircc_net_open(struct net_device *dev)
                        IRDA_WARNING("%s, unable to allocate dma2=%d\n",
                                     driver_name, self->io.dma2);
                        free_irq(self->io.irq, self);
+                        free_dma(self->io.dma);
                        return -EAGAIN;
                }
        }
@@ -1606,6 +1607,8 @@ static int via_ircc_net_close(struct net_device *dev)
        EnAllInt(iobase, OFF);
        free_irq(self->io.irq, dev);
        free_dma(self->io.dma);
+        if (self->io.dma2 != self->io.dma)
+                free_dma(self->io.dma2);
        return 0;
 }
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 3b2a6c598088..993d87c9296f 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -277,7 +277,7 @@ static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
        *tcph = tcp_hdr(skb);
        /* check if ip header and tcp header are complete */
-        if (iph->tot_len < ip_len + tcp_hdrlen(skb))
+        if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
                return -1;
        *hdr_flags = LRO_IPV4 | LRO_TCP;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 7ab94c825b57..b9018bfa0a97 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -602,6 +602,12 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
        tun->attached = 1;
        get_net(dev_net(tun->dev));
+        /* Make sure persistent devices do not get stuck in
+         * xoff state.
+         */
+        if (netif_running(tun->dev))
+                netif_wake_queue(tun->dev);
        strcpy(ifr->ifr_name, tun->dev->name);
        return 0;
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
index 520bb0b1a9a2..6d35155c7145 100644
--- a/drivers/net/wan/hdlc_fr.c
+++ b/drivers/net/wan/hdlc_fr.c
@@ -1008,6 +1008,7 @@ static int fr_rx(struct sk_buff *skb)
                stats->rx_bytes += skb->len;
                if (pvc->state.becn)
                        stats->rx_compressed++;
+                skb->dev = dev;
                netif_rx(skb);
                return NET_RX_SUCCESS;
        } else {
diff --git a/drivers/net/wireless/hostap/hostap_cs.c b/drivers/net/wireless/hostap/hostap_cs.c
index 80039a0ae027..3b4e55cf33cd 100644
--- a/drivers/net/wireless/hostap/hostap_cs.c
+++ b/drivers/net/wireless/hostap/hostap_cs.c
@@ -777,8 +777,10 @@ static int hostap_cs_suspend(struct pcmcia_device *link)
        int dev_open = 0;
        struct hostap_interface *iface = NULL;
-        if (dev)
+        if (!dev)
-                iface = netdev_priv(dev);
+                return -ENODEV;
+        iface = netdev_priv(dev);
        PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_PM_SUSPEND\n", dev_info);
        if (iface && iface->local)
@@ -798,8 +800,10 @@ static int hostap_cs_resume(struct pcmcia_device *link)
        int dev_open = 0;
        struct hostap_interface *iface = NULL;
-        if (dev)
+        if (!dev)
-                iface = netdev_priv(dev);
+                return -ENODEV;
+        iface = netdev_priv(dev);
        PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_PM_RESUME\n", dev_info);
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 62a3d8f8563e..55ac850744b3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -449,7 +449,7 @@ static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
        if (print_summary) {
                char *title;
-                u32 rate;
+                int rate;
                if (hundred)
                        title = "100Frames";
@@ -487,7 +487,7 @@ static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
                 *    but you can hack it to show more, if you'd like to. */
                if (dataframe)
                        IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
-                                     "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
+                                     "len=%u, rssi=%d, chnl=%d, rate=%d, \n",
                                     title, fc, header->addr1[5],
                                     length, rssi, channel, rate);
                else {
@@ -588,8 +588,12 @@ static void iwl3945_add_radiotap(struct iwl3945_priv *priv,
        if (rate == -1)
                iwl3945_rt->rt_rate = 0;
-        else
+        else {
+                if (stats->band == IEEE80211_BAND_5GHZ)
+                        rate += IWL_FIRST_OFDM_RATE;
                iwl3945_rt->rt_rate = iwl3945_rates[rate].ieee;
+        }
        /* antenna number */
        antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index bf19eb8aafd0..de330ae0ca95 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -3528,8 +3528,12 @@ static void iwl4965_add_radiotap(struct iwl_priv *priv,
        if (rate == -1)
                iwl4965_rt->rt_rate = 0;
-        else
+        else {
+                if (stats->band == IEEE80211_BAND_5GHZ)
+                        rate += IWL_FIRST_OFDM_RATE;
                iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
+        }
        /*
         * "antenna number"
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index b1b3c523185d..6027e1119c3f 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -6687,7 +6687,8 @@ static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
        if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
                IWL_DEBUG_MAC80211("leave - monitor\n");
-                return -1;
+                dev_kfree_skb_any(skb);
+                return 0;
        }
        IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 5ed16ce78468..0bd55bb19739 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -6237,7 +6237,8 @@ static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
        if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
                IWL_DEBUG_MAC80211("leave - monitor\n");
-                return -1;
+                dev_kfree_skb_any(skb);
+                return 0;
        }
        IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 8032df72aaab..36288b29abf7 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -925,6 +925,7 @@ static struct usb_driver if_usb_driver = {
        .id_table = if_usb_table,
        .suspend = if_usb_suspend,
        .resume = if_usb_resume,
+        .reset_resume = if_usb_resume,
 };
 static int __init if_usb_init_module(void)
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
index d448c9702a0f..387d4878af2f 100644
--- a/drivers/net/wireless/libertas/scan.c
+++ b/drivers/net/wireless/libertas/scan.c
@@ -567,11 +567,11 @@ static int lbs_process_bss(struct bss_descriptor *bss,
        pos += 8;
        /* beacon interval is 2 bytes long */
-        bss->beaconperiod = le16_to_cpup((void *) pos);
+        bss->beaconperiod = get_unaligned_le16(pos);
        pos += 2;
        /* capability information is 2 bytes long */
-        bss->capability = le16_to_cpup((void *) pos);
+        bss->capability = get_unaligned_le16(pos);
        lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability);
        pos += 2;
diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c
index 560b9c73c0b9..b36ed1c6c746 100644
--- a/drivers/net/wireless/rt2x00/rt2400pci.c
+++ b/drivers/net/wireless/rt2x00/rt2400pci.c
@@ -731,6 +731,17 @@ static int rt2400pci_init_registers(struct rt2x00_dev *rt2x00dev)
                           (rt2x00dev->rx->data_size / 128));
        rt2x00pci_register_write(rt2x00dev, CSR9, reg);
+        rt2x00pci_register_read(rt2x00dev, CSR14, &reg);
+        rt2x00_set_field32(&reg, CSR14_TSF_COUNT, 0);
+        rt2x00_set_field32(&reg, CSR14_TSF_SYNC, 0);
+        rt2x00_set_field32(&reg, CSR14_TBCN, 0);
+        rt2x00_set_field32(&reg, CSR14_TCFP, 0);
+        rt2x00_set_field32(&reg, CSR14_TATIMW, 0);
+        rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 0);
+        rt2x00_set_field32(&reg, CSR14_CFP_COUNT_PRELOAD, 0);
+        rt2x00_set_field32(&reg, CSR14_TBCM_PRELOAD, 0);
+        rt2x00pci_register_write(rt2x00dev, CSR14, reg);
        rt2x00pci_register_write(rt2x00dev, CNT3, 0x3f080000);
        rt2x00pci_register_read(rt2x00dev, ARCSR0, &reg);
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index a5ed54b69262..f7731fb82555 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -824,6 +824,17 @@ static int rt2500pci_init_registers(struct rt2x00_dev *rt2x00dev)
        rt2x00_set_field32(&reg, CSR11_CW_SELECT, 0);
        rt2x00pci_register_write(rt2x00dev, CSR11, reg);
+        rt2x00pci_register_read(rt2x00dev, CSR14, &reg);
+        rt2x00_set_field32(&reg, CSR14_TSF_COUNT, 0);
+        rt2x00_set_field32(&reg, CSR14_TSF_SYNC, 0);
+        rt2x00_set_field32(&reg, CSR14_TBCN, 0);
+        rt2x00_set_field32(&reg, CSR14_TCFP, 0);
+        rt2x00_set_field32(&reg, CSR14_TATIMW, 0);
+        rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 0);
+        rt2x00_set_field32(&reg, CSR14_CFP_COUNT_PRELOAD, 0);
+        rt2x00_set_field32(&reg, CSR14_TBCM_PRELOAD, 0);
+        rt2x00pci_register_write(rt2x00dev, CSR14, reg);
        rt2x00pci_register_write(rt2x00dev, CNT3, 0);
        rt2x00pci_register_read(rt2x00dev, TXCSR8, &reg);
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index 61e59c17a60a..d90512f97b39 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -801,6 +801,13 @@ static int rt2500usb_init_registers(struct rt2x00_dev *rt2x00dev)
        rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1_VALID, 0);
        rt2500usb_register_write(rt2x00dev, TXRX_CSR8, reg);
+        rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
+        rt2x00_set_field16(&reg, TXRX_CSR19_TSF_COUNT, 0);
+        rt2x00_set_field16(&reg, TXRX_CSR19_TSF_SYNC, 0);
+        rt2x00_set_field16(&reg, TXRX_CSR19_TBCN, 0);
+        rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 0);
+        rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
        rt2500usb_register_write(rt2x00dev, TXRX_CSR21, 0xe78f);
        rt2500usb_register_write(rt2x00dev, MAC_CSR9, 0xff1d);
diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 14bc7b281659..c3afb5cbe807 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -1201,6 +1201,15 @@ static int rt61pci_init_registers(struct rt2x00_dev *rt2x00dev)
        rt2x00_set_field32(&reg, TXRX_CSR8_ACK_CTS_54MBS, 42);
        rt2x00pci_register_write(rt2x00dev, TXRX_CSR8, reg);
+        rt2x00pci_register_read(rt2x00dev, TXRX_CSR9, &reg);
+        rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TSF_TICKING, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TSF_SYNC, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TIMESTAMP_COMPENSATE, 0);
+        rt2x00pci_register_write(rt2x00dev, TXRX_CSR9, reg);
        rt2x00pci_register_write(rt2x00dev, TXRX_CSR15, 0x0000000f);
        rt2x00pci_register_write(rt2x00dev, MAC_CSR6, 0x00000fff);
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 83cc0147f698..46e9e081fbf1 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1006,6 +1006,15 @@ static int rt73usb_init_registers(struct rt2x00_dev *rt2x00dev)
        rt2x00_set_field32(&reg, TXRX_CSR8_ACK_CTS_54MBS, 42);
        rt73usb_register_write(rt2x00dev, TXRX_CSR8, reg);
+        rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
+        rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TSF_TICKING, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TSF_SYNC, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 0);
+        rt2x00_set_field32(&reg, TXRX_CSR9_TIMESTAMP_COMPENSATE, 0);
+        rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
        rt73usb_register_write(rt2x00dev, TXRX_CSR15, 0x0000000f);
        rt73usb_register_read(rt2x00dev, MAC_CSR6, &reg);
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
index 418606ac1c3b..694e95d35fd4 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -765,6 +765,7 @@ static void zd_op_remove_interface(struct ieee80211_hw *hw,
 {
        struct zd_mac *mac = zd_hw_mac(hw);
        mac->type = IEEE80211_IF_TYPE_INVALID;
+        zd_set_beacon_interval(&mac->chip, 0);
        zd_write_mac_addr(&mac->chip, NULL);
 }
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index 8941f5eb96c2..6cdad9764604 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -64,6 +64,7 @@ static struct usb_device_id usb_ids[] = {
        { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
        { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
        { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
+        { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
        { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
        { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
        { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c
index 3ce9f3defc12..956d3e79f6aa 100644
--- a/drivers/rapidio/rio-driver.c
+++ b/drivers/rapidio/rio-driver.c
@@ -101,8 +101,8 @@ static int rio_device_probe(struct device *dev)
                if (error >= 0) {
                        rdev->driver = rdrv;
                        error = 0;
+                } else
                        rio_dev_put(rdev);
-                }
        }
        return error;
 }
diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c
index 11644c8fca82..abfdfcbaa059 100644
--- a/drivers/rtc/rtc-fm3130.c
+++ b/drivers/rtc/rtc-fm3130.c
@@ -55,7 +55,7 @@ struct fm3130 {
        int                     alarm;
 };
 static const struct i2c_device_id fm3130_id[] = {
-        { "fm3130-rtc", 0 },
+        { "fm3130", 0 },
        { }
 };
 MODULE_DEVICE_TABLE(i2c, fm3130_id);
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 0fc4c3630780..748a502a6355 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -302,6 +302,7 @@ static int pcf8563_remove(struct i2c_client *client)
 static const struct i2c_device_id pcf8563_id[] = {
        { "pcf8563", 0 },
+        { "rtc8564", 0 },
        { }
 };
 MODULE_DEVICE_TABLE(i2c, pcf8563_id);
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 999e91ea7451..e7a3a6554425 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -71,6 +71,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/libata.h>
+#include <linux/hdreg.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/processor.h>
@@ -4913,8 +4914,11 @@ static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
        struct ipr_resource_entry *res;
        res = (struct ipr_resource_entry *)sdev->hostdata;
-        if (res && ipr_is_gata(res))
+        if (res && ipr_is_gata(res)) {
+                if (cmd == HDIO_GET_IDENTITY)
+                        return -ENOTTY;
                return ata_scsi_ioctl(sdev, cmd, arg);
+        }
        return -EINVAL;
 }
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index a82d2fe80fb5..cbf55d59a54c 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -207,6 +207,15 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
         */
        blk_execute_rq(req->q, NULL, req, 1);
+        /*
+         * Some devices (USB mass-storage in particular) may transfer
+         * garbage data together with a residue indicating that the data
+         * is invalid.  Prevent the garbage from being misinterpreted
+         * and prevent security leaks by zeroing out the excess data.
+         */
+        if (unlikely(req->data_len > 0 && req->data_len <= bufflen))
+                memset(buffer + (bufflen - req->data_len), 0, req->data_len);
        ret = req->errors;
 out:
        blk_put_request(req);
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 1bc00b721e9d..be95e55b228b 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2623,6 +2623,9 @@ static struct console serial8250_console = {
 static int __init serial8250_console_init(void)
 {
+        if (nr_uarts > UART_NR)
+                nr_uarts = UART_NR;
        serial8250_isa_init_ports();
        register_console(&serial8250_console);
        return 0;
diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c
index d28c53868093..538c570df337 100644
--- a/drivers/ssb/driver_pcicore.c
+++ b/drivers/ssb/driver_pcicore.c
@@ -537,6 +537,13 @@ int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc,
        int err = 0;
        u32 tmp;
+        if (dev->bus->bustype != SSB_BUSTYPE_PCI) {
+                /* This SSB device is not on a PCI host-bus. So the IRQs are
+                 * not routed through the PCI core.
+                 * So we must not enable routing through the PCI core. */
+                goto out;
+        }
        if (!pdev)
                goto out;
        bus = pdev->bus;
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 7158dbb6e4b4..42a436478b78 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -924,6 +924,15 @@ static int register_root_hub(struct usb_hcd *hcd)
        return retval;
 }
+void usb_enable_root_hub_irq (struct usb_bus *bus)
+{
+        struct usb_hcd *hcd;
+        hcd = container_of (bus, struct usb_hcd, self);
+        if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT)
+                hcd->driver->hub_irq_enable (hcd);
+}
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index a0bf5df6cb6f..b9de1569b39e 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -210,6 +210,8 @@ struct hc_driver {
        int     (*bus_suspend)(struct usb_hcd *);
        int     (*bus_resume)(struct usb_hcd *);
        int     (*start_port_reset)(struct usb_hcd *, unsigned port_num);
+        void    (*hub_irq_enable)(struct usb_hcd *);
+                /* Needed only if port-change IRQs are level-triggered */
                /* force handover of high-speed port to full-speed companion */
        void    (*relinquish_port)(struct usb_hcd *, int);
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 512d2d57d41e..4cfe32a16c37 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2073,6 +2073,8 @@ int usb_port_resume(struct usb_device *udev)
        }
        clear_bit(port1, hub->busy_bits);
+        if (!hub->hdev->parent && !hub->busy_bits[0])
+                usb_enable_root_hub_irq(hub->hdev->bus);
        if (status == 0)
                status = finish_port_resume(udev);
@@ -3002,6 +3004,11 @@ static void hub_events(void)
                hub->activating = 0;
+                /* If this is a root hub, tell the HCD it's okay to
+                 * re-enable port-change interrupts now. */
+                if (!hdev->parent && !hub->busy_bits[0])
+                        usb_enable_root_hub_irq(hdev->bus);
 loop_autopm:
                /* Allow autosuspend if we're not going to run again */
                if (list_empty(&hub->event_list))
@@ -3227,6 +3234,8 @@ int usb_reset_device(struct usb_device *udev)
                        break;
        }
        clear_bit(port1, parent_hub->busy_bits);
+        if (!parent_hdev->parent && !parent_hub->busy_bits[0])
+                usb_enable_root_hub_irq(parent_hdev->bus);
        if (ret < 0)
                goto re_enumerate;
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index c96db1153dcf..e534f9de0f05 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -261,6 +261,7 @@ static const struct hc_driver ohci_at91_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-au1xxx.c b/drivers/usb/host/ohci-au1xxx.c
index 1b9abdba920b..68c17f5ea8ea 100644
--- a/drivers/usb/host/ohci-au1xxx.c
+++ b/drivers/usb/host/ohci-au1xxx.c
@@ -8,7 +8,7 @@
 * Bus Glue for AMD Alchemy Au1xxx
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for LH7A404 from ohci-sa1111.c
 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
@@ -288,6 +288,7 @@ static const struct hc_driver ohci_au1xxx_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ep93xx.c b/drivers/usb/host/ohci-ep93xx.c
index 06aadfb0ec29..5adaf36e47d0 100644
--- a/drivers/usb/host/ohci-ep93xx.c
+++ b/drivers/usb/host/ohci-ep93xx.c
@@ -135,6 +135,7 @@ static struct hc_driver ohci_ep93xx_hc_driver = {
        .get_frame_number       = ohci_get_frame,
        .hub_status_data        = ohci_hub_status_data,
        .hub_control            = ohci_hub_control,
+        .hub_irq_enable         = ohci_rhsc_enable,
 #ifdef CONFIG_PM
        .bus_suspend            = ohci_bus_suspend,
        .bus_resume             = ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 79a78029f896..b56739221d11 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -36,6 +36,18 @@
 /*-------------------------------------------------------------------------*/
+/* hcd->hub_irq_enable() */
+static void ohci_rhsc_enable (struct usb_hcd *hcd)
+{
+        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
+        spin_lock_irq(&ohci->lock);
+        if (!ohci->autostop)
+                del_timer(&hcd->rh_timer);      /* Prevent next poll */
+        ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
+        spin_unlock_irq(&ohci->lock);
+}
 #define OHCI_SCHED_ENABLES \
        (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
@@ -362,28 +374,18 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                int any_connected)
 {
        int     poll_rh = 1;
-        int     rhsc;
-        rhsc = ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC;
        switch (ohci->hc_control & OHCI_CTRL_HCFS) {
        case OHCI_USB_OPER:
-                /* If no status changes are pending, enable status-change
+                /* keep on polling until we know a device is connected
-                 * interrupts.
+                 * and RHSC is enabled */
-                 */
-                if (!rhsc && !changed) {
-                        rhsc = OHCI_INTR_RHSC;
-                        ohci_writel(ohci, rhsc, &ohci->regs->intrenable);
-                }
-                /* Keep on polling until we know a device is connected
-                 * and RHSC is enabled, or until we autostop.
-                 */
                if (!ohci->autostop) {
                        if (any_connected ||
                                        !device_may_wakeup(&ohci_to_hcd(ohci)
                                                ->self.root_hub->dev)) {
-                                if (rhsc)
+                                if (ohci_readl(ohci, &ohci->regs->intrenable) &
+                                                OHCI_INTR_RHSC)
                                        poll_rh = 0;
                        } else {
                                ohci->autostop = 1;
@@ -396,13 +398,12 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                                ohci->autostop = 0;
                                ohci->next_statechange = jiffies +
                                                STATECHANGE_DELAY;
-                        } else if (rhsc && time_after_eq(jiffies,
+                        } else if (time_after_eq(jiffies,
                                                ohci->next_statechange)
                                        && !ohci->ed_rm_list
                                        && !(ohci->hc_control &
                                                OHCI_SCHED_ENABLES)) {
                                ohci_rh_suspend(ohci, 1);
-                                poll_rh = 0;
                        }
                }
                break;
@@ -416,12 +417,6 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                        else
                                usb_hcd_resume_root_hub(ohci_to_hcd(ohci));
                } else {
-                        if (!rhsc && (ohci->autostop ||
-                                        ohci_to_hcd(ohci)->self.root_hub->
-                                                do_remote_wakeup))
-                                ohci_writel(ohci, OHCI_INTR_RHSC,
-                                                &ohci->regs->intrenable);
                        /* everything is idle, no need for polling */
                        poll_rh = 0;
                }
@@ -443,16 +438,12 @@ static inline int ohci_rh_resume(struct ohci_hcd *ohci)
 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                int any_connected)
 {
-        /* If RHSC is enabled, don't poll */
+        int     poll_rh = 1;
-        if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
-                return 0;
-        /* If no status changes are pending, enable status-change interrupts */
+        /* keep on polling until RHSC is enabled */
-        if (!changed) {
+        if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
-                ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
+                poll_rh = 0;
-                return 0;
+        return poll_rh;
-        }
-        return 1;
 }
 #endif  /* CONFIG_PM */
diff --git a/drivers/usb/host/ohci-lh7a404.c b/drivers/usb/host/ohci-lh7a404.c
index 96d14fa1d833..1ef5d482c145 100644
--- a/drivers/usb/host/ohci-lh7a404.c
+++ b/drivers/usb/host/ohci-lh7a404.c
@@ -8,7 +8,7 @@
 * Bus Glue for Sharp LH7A404
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for LH7A404 from ohci-sa1111.c
 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
@@ -193,6 +193,7 @@ static const struct hc_driver ohci_lh7a404_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 6859fb5f1d6f..3a7c24c03671 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -466,6 +466,7 @@ static const struct hc_driver ohci_omap_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 3bf175d95a23..4696cc912e16 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -327,6 +327,7 @@ static const struct hc_driver ohci_pci_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-pnx4008.c b/drivers/usb/host/ohci-pnx4008.c
index 664f07ee8732..28b458f20cc3 100644
--- a/drivers/usb/host/ohci-pnx4008.c
+++ b/drivers/usb/host/ohci-pnx4008.c
@@ -280,6 +280,7 @@ static const struct hc_driver ohci_pnx4008_hc_driver = {
         */
        .hub_status_data = ohci_hub_status_data,
        .hub_control = ohci_hub_control,
+        .hub_irq_enable = ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend = ohci_bus_suspend,
        .bus_resume = ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-pnx8550.c b/drivers/usb/host/ohci-pnx8550.c
index 28467e288a93..605d59cba28e 100644
--- a/drivers/usb/host/ohci-pnx8550.c
+++ b/drivers/usb/host/ohci-pnx8550.c
@@ -201,6 +201,7 @@ static const struct hc_driver ohci_pnx8550_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 50e55db13636..a67252791223 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -72,6 +72,7 @@ static const struct hc_driver ohci_ppc_of_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ppc-soc.c b/drivers/usb/host/ohci-ppc-soc.c
index cd3398b675b2..523c30125577 100644
--- a/drivers/usb/host/ohci-ppc-soc.c
+++ b/drivers/usb/host/ohci-ppc-soc.c
@@ -172,6 +172,7 @@ static const struct hc_driver ohci_ppc_soc_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ps3.c b/drivers/usb/host/ohci-ps3.c
index bfdeb0d22d05..c1935ae537f8 100644
--- a/drivers/usb/host/ohci-ps3.c
+++ b/drivers/usb/host/ohci-ps3.c
@@ -68,6 +68,7 @@ static const struct hc_driver ps3_ohci_hc_driver = {
        .get_frame_number       = ohci_get_frame,
        .hub_status_data        = ohci_hub_status_data,
        .hub_control            = ohci_hub_control,
+        .hub_irq_enable         = ohci_rhsc_enable,
        .start_port_reset       = ohci_start_port_reset,
 #if defined(CONFIG_PM)
        .bus_suspend            = ohci_bus_suspend,
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 70b0d4b459e7..d4ee27d92be8 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -298,6 +298,7 @@ static const struct hc_driver ohci_pxa27x_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
index a73d2ff322e2..3c7a740cfe0c 100644
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -8,7 +8,7 @@
 * USB Bus Glue for Samsung S3C2410
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c
 *      by Ben Dooks, <ben@simtec.co.uk>
@@ -466,6 +466,7 @@ static const struct hc_driver ohci_s3c2410_hc_driver = {
         */
        .hub_status_data =      ohci_s3c2410_hub_status_data,
        .hub_control =          ohci_s3c2410_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c
index 99438c65981b..2e9dceb9bb99 100644
--- a/drivers/usb/host/ohci-sa1111.c
+++ b/drivers/usb/host/ohci-sa1111.c
@@ -8,7 +8,7 @@
 * SA1111 Bus Glue
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
 *
 * This file is licenced under the GPL.
 */
@@ -231,6 +231,7 @@ static const struct hc_driver ohci_sa1111_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-sh.c b/drivers/usb/host/ohci-sh.c
index 60f03cc7ec4f..e7ee607278fe 100644
--- a/drivers/usb/host/ohci-sh.c
+++ b/drivers/usb/host/ohci-sh.c
@@ -68,6 +68,7 @@ static const struct hc_driver ohci_sh_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-sm501.c b/drivers/usb/host/ohci-sm501.c
index e899a77dfb83..e610698c6b60 100644
--- a/drivers/usb/host/ohci-sm501.c
+++ b/drivers/usb/host/ohci-sm501.c
@@ -75,6 +75,7 @@ static const struct hc_driver ohci_sm501_hc_driver = {
         */
        .hub_status_data =      ohci_hub_status_data,
        .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend =          ohci_bus_suspend,
        .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ssb.c b/drivers/usb/host/ohci-ssb.c
index c4265caec780..7275186db315 100644
--- a/drivers/usb/host/ohci-ssb.c
+++ b/drivers/usb/host/ohci-ssb.c
@@ -81,6 +81,7 @@ static const struct hc_driver ssb_ohci_hc_driver = {
        .hub_status_data        = ohci_hub_status_data,
        .hub_control            = ohci_hub_control,
+        .hub_irq_enable         = ohci_rhsc_enable,
 #ifdef  CONFIG_PM
        .bus_suspend            = ohci_bus_suspend,
        .bus_resume             = ohci_bus_resume,
diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index f29307405bb3..9b6323f768b2 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -2934,6 +2934,16 @@ static int u132_start_port_reset(struct usb_hcd *hcd, unsigned port_num)
                return 0;
 }
+static void u132_hub_irq_enable(struct usb_hcd *hcd)
+{
+        struct u132 *u132 = hcd_to_u132(hcd);
+        if (u132->going > 1) {
+                dev_err(&u132->platform_dev->dev, "device has been removed %d\n"
+                        , u132->going);
+        } else if (u132->going > 0)
+                dev_err(&u132->platform_dev->dev, "device is being removed\n");
+}
 #ifdef CONFIG_PM
 static int u132_bus_suspend(struct usb_hcd *hcd)
@@ -2985,6 +2995,7 @@ static struct hc_driver u132_hc_driver = {
        .bus_suspend = u132_bus_suspend,
        .bus_resume = u132_bus_resume,
        .start_port_reset = u132_start_port_reset,
+        .hub_irq_enable = u132_hub_irq_enable,
 };
 /*
diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c
index 24843fdd5395..59df132cc375 100644
--- a/drivers/video/fb_defio.c
+++ b/drivers/video/fb_defio.c
@@ -74,6 +74,7 @@ static int fb_deferred_io_mkwrite(struct vm_area_struct *vma,
 {
        struct fb_info *info = vma->vm_private_data;
        struct fb_deferred_io *fbdefio = info->fbdefio;
+        struct page *cur;
        /* this is a callback we get when userspace first tries to
        write to the page. we schedule a workqueue. that workqueue
@@ -83,7 +84,24 @@ static int fb_deferred_io_mkwrite(struct vm_area_struct *vma,
        /* protect against the workqueue changing the page list */
        mutex_lock(&fbdefio->lock);
-        list_add(&page->lru, &fbdefio->pagelist);
+        /* we loop through the pagelist before adding in order
+        to keep the pagelist sorted */
+        list_for_each_entry(cur, &fbdefio->pagelist, lru) {
+                /* this check is to catch the case where a new
+                process could start writing to the same page
+                through a new pte. this new access can cause the
+                mkwrite even when the original ps's pte is marked
+                writable */
+                if (unlikely(cur == page))
+                        goto page_already_added;
+                else if (cur->index > page->index)
+                        break;
+        }
+        list_add_tail(&page->lru, &cur->lru);
+page_already_added:
        mutex_unlock(&fbdefio->lock);
        /* come back after delay to process the deferred IO */
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index 712dabc6269f..09d7e22c6fef 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -1324,7 +1324,7 @@ static int fsl_diu_suspend(struct of_device *ofdev, pm_message_t state)
 {
        struct fsl_diu_data *machine_data;
-        machine_data = dev_get_drvdata(&dev->dev);
+        machine_data = dev_get_drvdata(&ofdev->dev);
        disable_lcdc(machine_data->fsl_diu_info[0]);
        return 0;
@@ -1334,7 +1334,7 @@ static int fsl_diu_resume(struct of_device *ofdev)
 {
        struct fsl_diu_data *machine_data;
-        machine_data = dev_get_drvdata(&dev->dev);
+        machine_data = dev_get_drvdata(&ofdev->dev);
        enable_lcdc(machine_data->fsl_diu_info[0]);
        return 0;
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 34902cff5400..0e9fc2ba90ee 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -34,11 +34,11 @@
 static struct cifs_wksid wksidarr[NUM_WK_SIDS] = {
        {{1, 0, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0} }, "null user"},
        {{1, 1, {0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0} }, "nobody"},
-        {{1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11), 0, 0, 0, 0} }, "net-users"},
+        {{1, 1, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(11), 0, 0, 0, 0} }, "net-users"},
-        {{1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(18), 0, 0, 0, 0} }, "sys"},
+        {{1, 1, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(18), 0, 0, 0, 0} }, "sys"},
-        {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(544), 0, 0, 0} }, "root"},
+        {{1, 2, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(32), __constant_cpu_to_le32(544), 0, 0, 0} }, "root"},
-        {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(545), 0, 0, 0} }, "users"},
+        {{1, 2, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(32), __constant_cpu_to_le32(545), 0, 0, 0} }, "users"},
-        {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(546), 0, 0, 0} }, "guest"} }
+        {{1, 2, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(32), __constant_cpu_to_le32(546), 0, 0, 0} }, "guest"} }
 ;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 722be543ceec..2e904bd111c8 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -219,15 +219,15 @@ int cifs_get_inode_info_unix(struct inode **pinode,
        rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
                                  cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
-        if (rc) {
+        if (rc == -EREMOTE && !is_dfs_referral) {
-                if (rc == -EREMOTE && !is_dfs_referral) {
+                is_dfs_referral = true;
-                        is_dfs_referral = true;
+                cFYI(DBG2, ("DFS ref"));
-                        cFYI(DBG2, ("DFS ref"));
+                /* for DFS, server does not give us real inode data */
-                        /* for DFS, server does not give us real inode data */
+                fill_fake_finddataunix(&find_data, sb);
-                        fill_fake_finddataunix(&find_data, sb);
+                rc = 0;
-                        rc = 0;
+        } else if (rc)
-                }
+                goto cgiiu_exit;
-        }
        num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
        end_of_file = le64_to_cpu(find_data.EndOfFile);
@@ -236,7 +236,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                *pinode = new_inode(sb);
                if (*pinode == NULL) {
                        rc = -ENOMEM;
-                goto cgiiu_exit;
+                        goto cgiiu_exit;
                }
                /* Is an i_ino of zero legal? */
                /* note ino incremented to unique num in new_inode */
diff --git a/fs/exec.c b/fs/exec.c
index da94a6f05df3..fd9234379e8d 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -610,7 +610,7 @@ int setup_arg_pages(struct linux_binprm *bprm,
        bprm->exec -= stack_shift;
        down_write(&mm->mmap_sem);
-        vm_flags = vma->vm_flags;
+        vm_flags = VM_STACK_FLAGS;
        /*
         * Adjust stack execute permissions; explicitly enable for
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 58d43daec084..982a2064fe4c 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -204,7 +204,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
         * Note: assumes we have exclusive access to this mapping either
         *       through inode->i_mutex or some other mechanism.
         */
-        if (page->index == 0 && invalidate_inode_pages2_range(inode->i_mapping, PAGE_CACHE_SIZE, -1) < 0) {
+        if (invalidate_inode_pages2_range(inode->i_mapping, page->index + 1, -1) < 0) {
                /* Should never happen */
                nfs_zap_mapping(inode, inode->i_mapping);
        }
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index efc015c6128a..44f87caf3683 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -606,7 +606,9 @@ static void dlm_init_lockres(struct dlm_ctxt *dlm,
        res->last_used = 0;
+        spin_lock(&dlm->spinlock);
        list_add_tail(&res->tracking, &dlm->tracking_list);
+        spin_unlock(&dlm->spinlock);
        memset(res->lvb, 0, DLM_LVB_LEN);
        memset(res->refmap, 0, sizeof(res->refmap));
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 394d25a131a5..80e20d9f2780 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -1554,8 +1554,8 @@ out:
 */
 int ocfs2_file_lock(struct file *file, int ex, int trylock)
 {
-        int ret, level = ex ? LKM_EXMODE : LKM_PRMODE;
+        int ret, level = ex ? DLM_LOCK_EX : DLM_LOCK_PR;
-        unsigned int lkm_flags = trylock ? LKM_NOQUEUE : 0;
+        unsigned int lkm_flags = trylock ? DLM_LKF_NOQUEUE : 0;
        unsigned long flags;
        struct ocfs2_file_private *fp = file->private_data;
        struct ocfs2_lock_res *lockres = &fp->fp_flock;
@@ -1582,7 +1582,7 @@ int ocfs2_file_lock(struct file *file, int ex, int trylock)
                 * Get the lock at NLMODE to start - that way we
                 * can cancel the upconvert request if need be.
                 */
-                ret = ocfs2_lock_create(osb, lockres, LKM_NLMODE, 0);
+                ret = ocfs2_lock_create(osb, lockres, DLM_LOCK_NL, 0);
                if (ret < 0) {
                        mlog_errno(ret);
                        goto out;
@@ -1597,7 +1597,7 @@ int ocfs2_file_lock(struct file *file, int ex, int trylock)
        }
        lockres->l_action = OCFS2_AST_CONVERT;
-        lkm_flags |= LKM_CONVERT;
+        lkm_flags |= DLM_LKF_CONVERT;
        lockres->l_requested = level;
        lockres_or_flags(lockres, OCFS2_LOCK_BUSY);
@@ -1664,7 +1664,7 @@ void ocfs2_file_unlock(struct file *file)
        if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED))
                return;
-        if (lockres->l_level == LKM_NLMODE)
+        if (lockres->l_level == DLM_LOCK_NL)
                return;
        mlog(0, "Unlock: \"%s\" flags: 0x%lx, level: %d, act: %d\n",
@@ -1678,11 +1678,11 @@ void ocfs2_file_unlock(struct file *file)
        lockres_or_flags(lockres, OCFS2_LOCK_BLOCKED);
        lockres->l_blocking = DLM_LOCK_EX;
-        gen = ocfs2_prepare_downconvert(lockres, LKM_NLMODE);
+        gen = ocfs2_prepare_downconvert(lockres, DLM_LOCK_NL);
        lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0);
        spin_unlock_irqrestore(&lockres->l_lock, flags);
-        ret = ocfs2_downconvert_lock(osb, lockres, LKM_NLMODE, 0, gen);
+        ret = ocfs2_downconvert_lock(osb, lockres, DLM_LOCK_NL, 0, gen);
        if (ret) {
                mlog_errno(ret);
                return;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index ab8ccc9d14ff..c492449f3b45 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -476,10 +476,10 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
                return -ESRCH;
        mm = get_task_mm(task);
        if (mm) {
-                static struct mm_walk clear_refs_walk;
+                struct mm_walk clear_refs_walk = {
-                memset(&clear_refs_walk, 0, sizeof(clear_refs_walk));
+                        .pmd_entry = clear_refs_pte_range,
-                clear_refs_walk.pmd_entry = clear_refs_pte_range;
+                        .mm = mm,
-                clear_refs_walk.mm = mm;
+                };
                down_read(&mm->mmap_sem);
                for (vma = mm->mmap; vma; vma = vma->vm_next) {
                        clear_refs_walk.private = vma;
@@ -602,11 +602,6 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
        return err;
 }
-static struct mm_walk pagemap_walk = {
-        .pmd_entry = pagemap_pte_range,
-        .pte_hole = pagemap_pte_hole
-};
 /*
 * /proc/pid/pagemap - an array mapping virtual pages to pfns
 *
@@ -641,6 +636,11 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
        struct pagemapread pm;
        int pagecount;
        int ret = -ESRCH;
+        struct mm_walk pagemap_walk;
+        unsigned long src;
+        unsigned long svpfn;
+        unsigned long start_vaddr;
+        unsigned long end_vaddr;
        if (!task)
                goto out;
@@ -659,11 +659,15 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
        if (!mm)
                goto out_task;
-        ret = -ENOMEM;
        uaddr = (unsigned long)buf & PAGE_MASK;
        uend = (unsigned long)(buf + count);
        pagecount = (PAGE_ALIGN(uend) - uaddr) / PAGE_SIZE;
-        pages = kmalloc(pagecount * sizeof(struct page *), GFP_KERNEL);
+        ret = 0;
+        if (pagecount == 0)
+                goto out_mm;
+        pages = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL);
+        ret = -ENOMEM;
        if (!pages)
                goto out_mm;
@@ -684,33 +688,33 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
        pm.out = (u64 *)buf;
        pm.end = (u64 *)(buf + count);
-        if (!ptrace_may_attach(task)) {
+        pagemap_walk.pmd_entry = pagemap_pte_range;
-                ret = -EIO;
+        pagemap_walk.pte_hole = pagemap_pte_hole;
-        } else {
+        pagemap_walk.mm = mm;
-                unsigned long src = *ppos;
+        pagemap_walk.private = &pm;
-                unsigned long svpfn = src / PM_ENTRY_BYTES;
-                unsigned long start_vaddr = svpfn << PAGE_SHIFT;
+        src = *ppos;
-                unsigned long end_vaddr = TASK_SIZE_OF(task);
+        svpfn = src / PM_ENTRY_BYTES;
+        start_vaddr = svpfn << PAGE_SHIFT;
-                /* watch out for wraparound */
+        end_vaddr = TASK_SIZE_OF(task);
-                if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT)
-                        start_vaddr = end_vaddr;
+        /* watch out for wraparound */
+        if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT)
-                /*
+                start_vaddr = end_vaddr;
-                 * The odds are that this will stop walking way
-                 * before end_vaddr, because the length of the
+        /*
-                 * user buffer is tracked in "pm", and the walk
+         * The odds are that this will stop walking way
-                 * will stop when we hit the end of the buffer.
+         * before end_vaddr, because the length of the
-                 */
+         * user buffer is tracked in "pm", and the walk
-                ret = walk_page_range(start_vaddr, end_vaddr,
+         * will stop when we hit the end of the buffer.
-                                        &pagemap_walk);
+         */
-                if (ret == PM_END_OF_BUFFER)
+        ret = walk_page_range(start_vaddr, end_vaddr, &pagemap_walk);
-                        ret = 0;
+        if (ret == PM_END_OF_BUFFER)
-                /* don't need mmap_sem for these, but this looks cleaner */
+                ret = 0;
-                *ppos += (char *)pm.out - buf;
+        /* don't need mmap_sem for these, but this looks cleaner */
-                if (!ret)
+        *ppos += (char *)pm.out - buf;
-                        ret = (char *)pm.out - buf;
+        if (!ret)
-        }
+                ret = (char *)pm.out - buf;
 out_pages:
        for (; pagecount; pagecount--) {
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 57917932212e..192269698a8a 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -45,6 +45,8 @@ void reiserfs_delete_inode(struct inode *inode)
                        goto out;
                reiserfs_update_inode_transaction(inode);
+                reiserfs_discard_prealloc(&th, inode);
                err = reiserfs_delete_object(&th, inode);
                /* Do quota update inside a transaction for journaled quotas. We must do that
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index afaee301b0ee..ad3d26ddfe31 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -2427,13 +2427,20 @@ restart:
        if (iclog->ic_size - iclog->ic_offset < 2*sizeof(xlog_op_header_t)) {
                xlog_state_switch_iclogs(log, iclog, iclog->ic_size);
-                /* If I'm the only one writing to this iclog, sync it to disk */
+                /*
-                if (atomic_read(&iclog->ic_refcnt) == 1) {
+                 * If I'm the only one writing to this iclog, sync it to disk.
+                 * We need to do an atomic compare and decrement here to avoid
+                 * racing with concurrent atomic_dec_and_lock() calls in
+                 * xlog_state_release_iclog() when there is more than one
+                 * reference to the iclog.
+                 */
+                if (!atomic_add_unless(&iclog->ic_refcnt, -1, 1)) {
+                        /* we are the only one */
                        spin_unlock(&log->l_icloglock);
-                        if ((error = xlog_state_release_iclog(log, iclog)))
+                        error = xlog_state_release_iclog(log, iclog);
+                        if (error)
                                return error;
                } else {
-                        atomic_dec(&iclog->ic_refcnt);
                        spin_unlock(&log->l_icloglock);
                }
                goto restart;
diff --git a/include/asm-avr32/setup.h b/include/asm-avr32/setup.h
index ea3070ff13a5..ff5b7cf6be4d 100644
--- a/include/asm-avr32/setup.h
+++ b/include/asm-avr32/setup.h
@@ -2,7 +2,7 @@
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * Based on linux/include/asm-arm/setup.h
- *   Copyright (C) 1997-1999 Russel King
+ *   Copyright (C) 1997-1999 Russell King
 *
 * 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
diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h
index d3a12a9079f7..7742ec000cc4 100644
--- a/include/asm-frv/system.h
+++ b/include/asm-frv/system.h
@@ -87,7 +87,7 @@ do {								\
 } while(0)
 #define irqs_disabled() \
-        ({unsigned long flags; local_save_flags(flags); flags; })
+        ({unsigned long flags; local_save_flags(flags); !!flags; })
 #define local_irq_save(flags)                   \
 do {                                            \
diff --git a/include/asm-powerpc/hugetlb.h b/include/asm-powerpc/hugetlb.h
index 649c6c3b87b3..be32ff02f4a0 100644
--- a/include/asm-powerpc/hugetlb.h
+++ b/include/asm-powerpc/hugetlb.h
@@ -49,12 +49,6 @@ static inline pte_t huge_pte_wrprotect(pte_t pte)
        return pte_wrprotect(pte);
 }
-static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
-                                           unsigned long addr, pte_t *ptep)
-{
-        ptep_set_wrprotect(mm, addr, ptep);
-}
 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
                                             unsigned long addr, pte_t *ptep,
                                             pte_t pte, int dirty)
diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h
index cc6a43ba41d0..7686569a0bef 100644
--- a/include/asm-powerpc/pgtable-ppc64.h
+++ b/include/asm-powerpc/pgtable-ppc64.h
@@ -314,6 +314,16 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
        old = pte_update(mm, addr, ptep, _PAGE_RW, 0);
 }
+static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
+                                           unsigned long addr, pte_t *ptep)
+{
+        unsigned long old;
+        if ((pte_val(*ptep) & _PAGE_RW) == 0)
+                return;
+        old = pte_update(mm, addr, ptep, _PAGE_RW, 1);
+}
 /*
 * We currently remove entries from the hashtable regardless of whether
 * the entry was young or dirty. The generic routines only flush if the
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index c7f4f8e3e297..bd0ea191dfa9 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -223,6 +223,9 @@ extern char empty_zero_page[PAGE_SIZE];
 #define _PAGE_SPECIAL   0x004           /* SW associated with special page */
 #define __HAVE_ARCH_PTE_SPECIAL
+/* Set of bits not changed in pte_modify */
+#define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_SPECIAL)
 /* Six different types of pages. */
 #define _PAGE_TYPE_EMPTY        0x400
 #define _PAGE_TYPE_NONE         0x401
@@ -681,7 +684,7 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
 */
 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 {
-        pte_val(pte) &= PAGE_MASK;
+        pte_val(pte) &= _PAGE_CHG_MASK;
        pte_val(pte) |= pgprot_val(newprot);
        return pte;
 }
diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h
index bfd9900742bf..76f392146daa 100644
--- a/include/asm-x86/kvm_para.h
+++ b/include/asm-x86/kvm_para.h
@@ -71,7 +71,8 @@ static inline long kvm_hypercall0(unsigned int nr)
        long ret;
        asm volatile(KVM_HYPERCALL
                     : "=a"(ret)
-                     : "a"(nr));
+                     : "a"(nr)
+                     : "memory");
        return ret;
 }
@@ -80,7 +81,8 @@ static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
        long ret;
        asm volatile(KVM_HYPERCALL
                     : "=a"(ret)
-                     : "a"(nr), "b"(p1));
+                     : "a"(nr), "b"(p1)
+                     : "memory");
        return ret;
 }
@@ -90,7 +92,8 @@ static inline long kvm_hypercall2(unsigned int nr, unsigned long p1,
        long ret;
        asm volatile(KVM_HYPERCALL
                     : "=a"(ret)
-                     : "a"(nr), "b"(p1), "c"(p2));
+                     : "a"(nr), "b"(p1), "c"(p2)
+                     : "memory");
        return ret;
 }
@@ -100,7 +103,8 @@ static inline long kvm_hypercall3(unsigned int nr, unsigned long p1,
        long ret;
        asm volatile(KVM_HYPERCALL
                     : "=a"(ret)
-                     : "a"(nr), "b"(p1), "c"(p2), "d"(p3));
+                     : "a"(nr), "b"(p1), "c"(p2), "d"(p3)
+                     : "memory");
        return ret;
 }
@@ -111,7 +115,8 @@ static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
        long ret;
        asm volatile(KVM_HYPERCALL
                     : "=a"(ret)
-                     : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4));
+                     : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4)
+                     : "memory");
        return ret;
 }
diff --git a/include/linux/debug_locks.h b/include/linux/debug_locks.h
index f4a5871767f5..4aaa4afb1cb9 100644
--- a/include/linux/debug_locks.h
+++ b/include/linux/debug_locks.h
@@ -1,6 +1,8 @@
 #ifndef __LINUX_DEBUG_LOCKING_H
 #define __LINUX_DEBUG_LOCKING_H
+#include <linux/kernel.h>
 struct task_struct;
 extern int debug_locks;
@@ -11,14 +13,6 @@ extern int debug_locks_silent;
 */
 extern int debug_locks_off(void);
-/*
- * In the debug case we carry the caller's instruction pointer into
- * other functions, but we dont want the function argument overhead
- * in the nondebug case - hence these macros:
- */
-#define _RET_IP_                (unsigned long)__builtin_return_address(0)
-#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
 #define DEBUG_LOCKS_WARN_ON(c)                                          \
 ({                                                                      \
        int __ret = 0;                                                  \
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9918772bf274..eddb6daadf4a 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -189,6 +189,21 @@ static inline void ide_std_init_ports(hw_regs_t *hw,
        hw->io_ports.ctl_addr = ctl_addr;
 }
+/* for IDE PCI controllers in legacy mode, temporary */
+static inline int __ide_default_irq(unsigned long base)
+{
+        switch (base) {
+#ifdef CONFIG_IA64
+        case 0x1f0: return isa_irq_to_vector(14);
+        case 0x170: return isa_irq_to_vector(15);
+#else
+        case 0x1f0: return 14;
+        case 0x170: return 15;
+#endif
+        }
+        return 0;
+}
 #include <asm/ide.h>
 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 792bf0aa779b..2e70006c7fa8 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -46,6 +46,9 @@ extern const char linux_proc_banner[];
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
+#define _RET_IP_                (unsigned long)__builtin_return_address(0)
+#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
 #ifdef CONFIG_LBD
 # include <asm/div64.h>
 # define sector_div(a, b) do_div(a, b)
diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 2ca6bae88721..fb0c215a3051 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -339,6 +339,7 @@ struct xfrm_usersa_info {
 #define XFRM_STATE_NOPMTUDISC   4
 #define XFRM_STATE_WILDRECV     8
 #define XFRM_STATE_ICMP         16
+#define XFRM_STATE_AF_UNSPEC    32
 };
 struct xfrm_usersa_id {
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index d4998f81e229..1485ca8d0e00 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -79,7 +79,7 @@ static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
 *
 * For such cases, we now have a blacklist
 */
-struct kprobe_blackpoint kprobe_blacklist[] = {
+static struct kprobe_blackpoint kprobe_blacklist[] = {
        {"preempt_schedule",},
        {NULL}    /* Terminator */
 };
diff --git a/kernel/printk.c b/kernel/printk.c
index 8fb01c32aa3b..e2129e83fd75 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -666,7 +666,7 @@ static int acquire_console_semaphore_for_printk(unsigned int cpu)
        return retval;
 }
-const char printk_recursion_bug_msg [] =
+static const char printk_recursion_bug_msg [] =
                        KERN_CRIT "BUG: recent printk recursion!\n";
 static int printk_recursion_bug;
diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index 5e02b7740702..41d275a81df5 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -925,26 +925,22 @@ void rcu_offline_cpu(int cpu)
        spin_unlock_irqrestore(&rdp->lock, flags);
 }
-void __devinit rcu_online_cpu(int cpu)
-{
-        unsigned long flags;
-        spin_lock_irqsave(&rcu_ctrlblk.fliplock, flags);
-        cpu_set(cpu, rcu_cpu_online_map);
-        spin_unlock_irqrestore(&rcu_ctrlblk.fliplock, flags);
-}
 #else /* #ifdef CONFIG_HOTPLUG_CPU */
 void rcu_offline_cpu(int cpu)
 {
 }
-void __devinit rcu_online_cpu(int cpu)
+#endif /* #else #ifdef CONFIG_HOTPLUG_CPU */
+void __cpuinit rcu_online_cpu(int cpu)
 {
-}
+        unsigned long flags;
-#endif /* #else #ifdef CONFIG_HOTPLUG_CPU */
+        spin_lock_irqsave(&rcu_ctrlblk.fliplock, flags);
+        cpu_set(cpu, rcu_cpu_online_map);
+        spin_unlock_irqrestore(&rcu_ctrlblk.fliplock, flags);
+}
 static void rcu_process_callbacks(struct softirq_action *unused)
 {
diff --git a/kernel/sched.c b/kernel/sched.c
index 94ead43eda62..4e2f60335656 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5622,10 +5622,10 @@ static int __migrate_task(struct task_struct *p, int src_cpu, int dest_cpu)
        double_rq_lock(rq_src, rq_dest);
        /* Already moved. */
        if (task_cpu(p) != src_cpu)
-                goto out;
+                goto done;
        /* Affinity changed (again). */
        if (!cpu_isset(dest_cpu, p->cpus_allowed))
-                goto out;
+                goto fail;
        on_rq = p->se.on_rq;
        if (on_rq)
@@ -5636,8 +5636,9 @@ static int __migrate_task(struct task_struct *p, int src_cpu, int dest_cpu)
                activate_task(rq_dest, p, 0);
                check_preempt_curr(rq_dest, p);
        }
+done:
        ret = 1;
-out:
+fail:
        double_rq_unlock(rq_src, rq_dest);
        return ret;
 }
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index c828c2339cc9..a272d78185eb 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -120,6 +120,7 @@ void softlockup_tick(void)
        printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %lus! [%s:%d]\n",
                        this_cpu, now - touch_timestamp,
                        current->comm, task_pid_nr(current));
+        print_modules();
        if (regs)
                show_regs(regs);
        else
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 6021757a4496..1dc2d1d18fa8 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -22,6 +22,8 @@
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <linux/kernel.h>
+#include <linux/kallsyms.h>
+#include <linux/uaccess.h>
 #include <asm/page.h>           /* for PAGE_SIZE */
 #include <asm/div64.h>
@@ -482,6 +484,89 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
        return buf;
 }
+static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags)
+{
+        int len, i;
+        if ((unsigned long)s < PAGE_SIZE)
+                s = "<NULL>";
+        len = strnlen(s, precision);
+        if (!(flags & LEFT)) {
+                while (len < field_width--) {
+                        if (buf < end)
+                                *buf = ' ';
+                        ++buf;
+                }
+        }
+        for (i = 0; i < len; ++i) {
+                if (buf < end)
+                        *buf = *s;
+                ++buf; ++s;
+        }
+        while (len < field_width--) {
+                if (buf < end)
+                        *buf = ' ';
+                ++buf;
+        }
+        return buf;
+}
+static inline void *dereference_function_descriptor(void *ptr)
+{
+#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
+        void *p;
+        if (!probe_kernel_address(ptr, p))
+                ptr = p;
+#endif
+        return ptr;
+}
+static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags)
+{
+        unsigned long value = (unsigned long) ptr;
+#ifdef CONFIG_KALLSYMS
+        char sym[KSYM_SYMBOL_LEN];
+        sprint_symbol(sym, value);
+        return string(buf, end, sym, field_width, precision, flags);
+#else
+        field_width = 2*sizeof(void *);
+        flags |= SPECIAL | SMALL | ZEROPAD;
+        return number(buf, end, value, 16, field_width, precision, flags);
+#endif
+}
+/*
+ * Show a '%p' thing.  A kernel extension is that the '%p' is followed
+ * by an extra set of alphanumeric characters that are extended format
+ * specifiers.
+ *
+ * Right now we just handle 'F' (for symbolic Function descriptor pointers)
+ * and 'S' (for Symbolic direct pointers), but this can easily be
+ * extended in the future (network address types etc).
+ *
+ * The difference between 'S' and 'F' is that on ia64 and ppc64 function
+ * pointers are really function descriptors, which contain a pointer the
+ * real address. 
+ */
+static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
+{
+        switch (*fmt) {
+        case 'F':
+                ptr = dereference_function_descriptor(ptr);
+                /* Fallthrough */
+        case 'S':
+                return symbol_string(buf, end, ptr, field_width, precision, flags);
+        }
+        flags |= SMALL;
+        if (field_width == -1) {
+                field_width = 2*sizeof(void *);
+                flags |= ZEROPAD;
+        }
+        return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags);
+}
 /**
 * vsnprintf - Format a string and place it in a buffer
 * @buf: The buffer to place the result into
@@ -502,11 +587,9 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
 */
 int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
-        int len;
        unsigned long long num;
-        int i, base;
+        int base;
        char *str, *end, c;
-        const char *s;
        int flags;              /* flags to number() */
@@ -622,43 +705,18 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
                                continue;
                        case 's':
-                                s = va_arg(args, char *);
+                                str = string(str, end, va_arg(args, char *), field_width, precision, flags);
-                                if ((unsigned long)s < PAGE_SIZE)
-                                        s = "<NULL>";
-                                len = strnlen(s, precision);
-                                if (!(flags & LEFT)) {
-                                        while (len < field_width--) {
-                                                if (str < end)
-                                                        *str = ' ';
-                                                ++str;
-                                        }
-                                }
-                                for (i = 0; i < len; ++i) {
-                                        if (str < end)
-                                                *str = *s;
-                                        ++str; ++s;
-                                }
-                                while (len < field_width--) {
-                                        if (str < end)
-                                                *str = ' ';
-                                        ++str;
-                                }
                                continue;
                        case 'p':
-                                flags |= SMALL;
+                                str = pointer(fmt+1, str, end,
-                                if (field_width == -1) {
+                                                va_arg(args, void *),
-                                        field_width = 2*sizeof(void *);
+                                                field_width, precision, flags);
-                                        flags |= ZEROPAD;
+                                /* Skip all alphanumeric pointer suffixes */
-                                }
+                                while (isalnum(fmt[1]))
-                                str = number(str, end,
+                                        fmt++;
-                                                (unsigned long) va_arg(args, void *),
-                                                16, field_width, precision, flags);
                                continue;
                        case 'n':
                                /* FIXME:
                                * What does C99 say about the overflow case here? */
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index a37a5034f63d..c94e58b192c3 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -729,7 +729,11 @@ static long do_get_mempolicy(int *policy, nodemask_t *nmask,
        } else {
                *policy = pol == &default_policy ? MPOL_DEFAULT :
                                                pol->mode;
-                *policy |= pol->flags;
+                /*
+                 * Internal mempolicy flags must be masked off before exposing
+                 * the policy to userspace.
+                 */
+                *policy |= (pol->flags & MPOL_MODE_FLAGS);
        }
        if (vma) {
diff --git a/mm/slub.c b/mm/slub.c
index 1a427c0ae83b..315c392253c7 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1628,9 +1628,11 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
        void **object;
        struct kmem_cache_cpu *c;
        unsigned long flags;
+        unsigned int objsize;
        local_irq_save(flags);
        c = get_cpu_slab(s, smp_processor_id());
+        objsize = c->objsize;
        if (unlikely(!c->freelist || !node_match(c, node)))
                object = __slab_alloc(s, gfpflags, node, addr, c);
@@ -1643,7 +1645,7 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
        local_irq_restore(flags);
        if (unlikely((gfpflags & __GFP_ZERO) && object))
-                memset(object, 0, c->objsize);
+                memset(object, 0, objsize);
        return object;
 }
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index c2397f503b0f..f38cc5317b88 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -442,12 +442,16 @@ int br_del_if(struct net_bridge *br, struct net_device *dev)
 void __exit br_cleanup_bridges(void)
 {
-        struct net_device *dev, *nxt;
+        struct net_device *dev;
        rtnl_lock();
-        for_each_netdev_safe(&init_net, dev, nxt)
+restart:
-                if (dev->priv_flags & IFF_EBRIDGE)
+        for_each_netdev(&init_net, dev) {
+                if (dev->priv_flags & IFF_EBRIDGE) {
                        del_br(dev->priv);
+                        goto restart;
+                }
+        }
        rtnl_unlock();
 }
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 7e8ca2836452..484bbf6dd032 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -205,12 +205,19 @@ static int can_create(struct net *net, struct socket *sock, int protocol)
 *  -ENOBUFS on full driver queue (see net_xmit_errno())
 *  -ENOMEM when local loopback failed at calling skb_clone()
 *  -EPERM when trying to send on a non-CAN interface
+ *  -EINVAL when the skb->data does not contain a valid CAN frame
 */
 int can_send(struct sk_buff *skb, int loop)
 {
        struct sk_buff *newskb = NULL;
+        struct can_frame *cf = (struct can_frame *)skb->data;
        int err;
+        if (skb->len != sizeof(struct can_frame) || cf->can_dlc > 8) {
+                kfree_skb(skb);
+                return -EINVAL;
+        }
        if (skb->dev->type != ARPHRD_CAN) {
                kfree_skb(skb);
                return -EPERM;
@@ -605,6 +612,7 @@ static int can_rcv(struct sk_buff *skb, struct net_device *dev,
                   struct packet_type *pt, struct net_device *orig_dev)
 {
        struct dev_rcv_lists *d;
+        struct can_frame *cf = (struct can_frame *)skb->data;
        int matches;
        if (dev->type != ARPHRD_CAN || dev_net(dev) != &init_net) {
@@ -612,6 +620,8 @@ static int can_rcv(struct sk_buff *skb, struct net_device *dev,
                return 0;
        }
+        BUG_ON(skb->len != sizeof(struct can_frame) || cf->can_dlc > 8);
        /* update statistics */
        can_stats.rx_frames++;
        can_stats.rx_frames_delta++;
diff --git a/net/can/bcm.c b/net/can/bcm.c
index d9a3a9d13bed..72c2ce904f83 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -298,7 +298,7 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
        if (head->nframes) {
                /* can_frames starting here */
-                firstframe = (struct can_frame *) skb_tail_pointer(skb);
+                firstframe = (struct can_frame *)skb_tail_pointer(skb);
                memcpy(skb_put(skb, datalen), frames, datalen);
@@ -826,6 +826,10 @@ static int bcm_tx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
                for (i = 0; i < msg_head->nframes; i++) {
                        err = memcpy_fromiovec((u8 *)&op->frames[i],
                                               msg->msg_iov, CFSIZ);
+                        if (op->frames[i].can_dlc > 8)
+                                err = -EINVAL;
                        if (err < 0)
                                return err;
@@ -858,6 +862,10 @@ static int bcm_tx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
                for (i = 0; i < msg_head->nframes; i++) {
                        err = memcpy_fromiovec((u8 *)&op->frames[i],
                                               msg->msg_iov, CFSIZ);
+                        if (op->frames[i].can_dlc > 8)
+                                err = -EINVAL;
                        if (err < 0) {
                                if (op->frames != &op->sframe)
                                        kfree(op->frames);
@@ -1164,9 +1172,12 @@ static int bcm_tx_send(struct msghdr *msg, int ifindex, struct sock *sk)
        skb->dev = dev;
        skb->sk  = sk;
-        can_send(skb, 1); /* send with loopback */
+        err = can_send(skb, 1); /* send with loopback */
        dev_put(dev);
+        if (err)
+                return err;
        return CFSIZ + MHSIZ;
 }
@@ -1185,6 +1196,10 @@ static int bcm_sendmsg(struct kiocb *iocb, struct socket *sock,
        if (!bo->bound)
                return -ENOTCONN;
+        /* check for valid message length from userspace */
+        if (size < MHSIZ || (size - MHSIZ) % CFSIZ)
+                return -EINVAL;
        /* check for alternative ifindex for this bcm_op */
        if (!ifindex && msg->msg_name) {
@@ -1259,8 +1274,8 @@ static int bcm_sendmsg(struct kiocb *iocb, struct socket *sock,
                break;
        case TX_SEND:
-                /* we need at least one can_frame */
+                /* we need exactly one can_frame behind the msg head */
-                if (msg_head.nframes < 1)
+                if ((msg_head.nframes != 1) || (size != CFSIZ + MHSIZ))
                        ret = -EINVAL;
                else
                        ret = bcm_tx_send(msg, ifindex, sk);
diff --git a/net/can/raw.c b/net/can/raw.c
index 69877b8e7e9c..3e46ee36a1aa 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -632,6 +632,9 @@ static int raw_sendmsg(struct kiocb *iocb, struct socket *sock,
        } else
                ifindex = ro->ifindex;
+        if (size != sizeof(struct can_frame))
+                return -EINVAL;
        dev = dev_get_by_index(&init_net, ifindex);
        if (!dev)
                return -ENXIO;
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 4b02d14e7ab9..e1600ad8fb0e 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1359,17 +1359,17 @@ static int check_leaf(struct trie *t, struct leaf *l,
                        t->stats.semantic_match_miss++;
 #endif
                if (err <= 0)
-                        return plen;
+                        return err;
        }
-        return -1;
+        return 1;
 }
 static int fn_trie_lookup(struct fib_table *tb, const struct flowi *flp,
                          struct fib_result *res)
 {
        struct trie *t = (struct trie *) tb->tb_data;
-        int plen, ret = 0;
+        int ret;
        struct node *n;
        struct tnode *pn;
        int pos, bits;
@@ -1393,10 +1393,7 @@ static int fn_trie_lookup(struct fib_table *tb, const struct flowi *flp,
        /* Just a leaf? */
        if (IS_LEAF(n)) {
-                plen = check_leaf(t, (struct leaf *)n, key, flp, res);
+                ret = check_leaf(t, (struct leaf *)n, key, flp, res);
-                if (plen < 0)
-                        goto failed;
-                ret = 0;
                goto found;
        }
@@ -1421,11 +1418,9 @@ static int fn_trie_lookup(struct fib_table *tb, const struct flowi *flp,
                }
                if (IS_LEAF(n)) {
-                        plen = check_leaf(t, (struct leaf *)n, key, flp, res);
+                        ret = check_leaf(t, (struct leaf *)n, key, flp, res);
-                        if (plen < 0)
+                        if (ret > 0)
                                goto backtrace;
-                        ret = 0;
                        goto found;
                }
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index 7750c97fde7b..ffeaffc3fffe 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -439,8 +439,8 @@ static unsigned char asn1_oid_decode(struct asn1_ctx *ctx,
                                     unsigned int *len)
 {
        unsigned long subid;
-        unsigned int  size;
        unsigned long *optr;
+        size_t size;
        size = eoc - ctx->pointer + 1;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 850825dc86e6..1d723de18686 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -255,6 +255,7 @@
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/skbuff.h>
+#include <linux/scatterlist.h>
 #include <linux/splice.h>
 #include <linux/net.h>
 #include <linux/socket.h>
@@ -1208,7 +1209,8 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
                return -ENOTCONN;
        while ((skb = tcp_recv_skb(sk, seq, &offset)) != NULL) {
                if (offset < skb->len) {
-                        size_t used, len;
+                        int used;
+                        size_t len;
                        len = skb->len - offset;
                        /* Stop reading if we hit a patch of urgent data */
diff --git a/net/ipv4/tcp_probe.c b/net/ipv4/tcp_probe.c
index 5ff0ce6e9d39..7ddc30f0744f 100644
--- a/net/ipv4/tcp_probe.c
+++ b/net/ipv4/tcp_probe.c
@@ -224,7 +224,7 @@ static __init int tcpprobe_init(void)
        if (bufsize < 0)
                return -EINVAL;
-        tcp_probe.log = kcalloc(sizeof(struct tcp_log), bufsize, GFP_KERNEL);
+        tcp_probe.log = kcalloc(bufsize, sizeof(struct tcp_log), GFP_KERNEL);
        if (!tcp_probe.log)
                goto err0;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 147588f4c7c0..ff61a5cdb0b3 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -749,12 +749,12 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
        }
        write_unlock_bh(&idev->lock);
+        addrconf_del_timer(ifp);
        ipv6_ifa_notify(RTM_DELADDR, ifp);
        atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
-        addrconf_del_timer(ifp);
        /*
         * Purge or update corresponding prefix
         *
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 3cd1c993d52b..dcf94fdfb863 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -445,7 +445,7 @@ looped_back:
                        kfree_skb(skb);
                        return -1;
                }
-                if (!ipv6_chk_home_addr(&init_net, addr)) {
+                if (!ipv6_chk_home_addr(dev_net(skb->dst->dev), addr)) {
                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
                                         IPSTATS_MIB_INADDRERRORS);
                        kfree_skb(skb);
diff --git a/net/irda/irnetlink.c b/net/irda/irnetlink.c
index 9e1fb82e3220..2f05ec1037ab 100644
--- a/net/irda/irnetlink.c
+++ b/net/irda/irnetlink.c
@@ -101,8 +101,8 @@ static int irda_nl_get_mode(struct sk_buff *skb, struct genl_info *info)
        hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
                          &irda_nl_family, 0,  IRDA_NL_CMD_GET_MODE);
-        if (IS_ERR(hdr)) {
+        if (hdr == NULL) {
-                ret = PTR_ERR(hdr);
+                ret = -EMSGSIZE;
                goto err_out;
        }
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 98c0b5e56ecc..df0836ff1a20 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -530,8 +530,6 @@ static int ieee80211_stop(struct net_device *dev)
                                local->sta_hw_scanning = 0;
                }
-                flush_workqueue(local->hw.workqueue);
                sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
                kfree(sdata->u.sta.extra_ie);
                sdata->u.sta.extra_ie = NULL;
@@ -555,6 +553,8 @@ static int ieee80211_stop(struct net_device *dev)
                ieee80211_led_radio(local, 0);
+                flush_workqueue(local->hw.workqueue);
                tasklet_disable(&local->tx_pending_tasklet);
                tasklet_disable(&local->tasklet);
        }
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 4d2b582dd055..b404537c0bcd 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -547,15 +547,14 @@ static void ieee80211_set_associated(struct net_device *dev,
                        sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
                }
-                netif_carrier_on(dev);
                ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
                memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
                memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
                ieee80211_sta_send_associnfo(dev, ifsta);
        } else {
+                netif_carrier_off(dev);
                ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
                ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
-                netif_carrier_off(dev);
                ieee80211_reset_erp_info(dev);
                sdata->bss_conf.assoc_ht = 0;
@@ -569,6 +568,10 @@ static void ieee80211_set_associated(struct net_device *dev,
        sdata->bss_conf.assoc = assoc;
        ieee80211_bss_info_change_notify(sdata, changed);
+        if (assoc)
+                netif_carrier_on(dev);
        wrqu.ap_addr.sa_family = ARPHRD_ETHER;
        wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 }
@@ -3611,8 +3614,10 @@ static int ieee80211_sta_find_ibss(struct net_device *dev,
        spin_unlock_bh(&local->sta_bss_lock);
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
-        printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
+        if (found)
-               "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
+                printk(KERN_DEBUG "   sta_find_ibss: selected %s current "
+                       "%s\n", print_mac(mac, bssid),
+                       print_mac(mac2, ifsta->bssid));
 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
        if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
            (bss = ieee80211_rx_bss_get(dev, bssid,
diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h
index 04afc13ed825..4ea7b97d1af1 100644
--- a/net/mac80211/rc80211_pid.h
+++ b/net/mac80211/rc80211_pid.h
@@ -141,7 +141,6 @@ struct rc_pid_events_file_info {
 *      rate behaviour values (lower means we should trust more what we learnt
 *      about behaviour of rates, higher means we should trust more the natural
 *      ordering of rates)
- * @fast_start: if Y, push high rates right after initialization
 */
 struct rc_pid_debugfs_entries {
        struct dentry *dir;
@@ -154,7 +153,6 @@ struct rc_pid_debugfs_entries {
        struct dentry *sharpen_factor;
        struct dentry *sharpen_duration;
        struct dentry *norm_offset;
-        struct dentry *fast_start;
 };
 void rate_control_pid_event_tx_status(struct rc_pid_event_buffer *buf,
@@ -267,9 +265,6 @@ struct rc_pid_info {
        /* Normalization offset. */
        unsigned int norm_offset;
-        /* Fast starst parameter. */
-        unsigned int fast_start;
        /* Rates information. */
        struct rc_pid_rateinfo *rinfo;
diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
index a849b745bdb5..bcd27c1d7594 100644
--- a/net/mac80211/rc80211_pid_algo.c
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -398,13 +398,25 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local)
                return NULL;
        }
+        pinfo->target = RC_PID_TARGET_PF;
+        pinfo->sampling_period = RC_PID_INTERVAL;
+        pinfo->coeff_p = RC_PID_COEFF_P;
+        pinfo->coeff_i = RC_PID_COEFF_I;
+        pinfo->coeff_d = RC_PID_COEFF_D;
+        pinfo->smoothing_shift = RC_PID_SMOOTHING_SHIFT;
+        pinfo->sharpen_factor = RC_PID_SHARPENING_FACTOR;
+        pinfo->sharpen_duration = RC_PID_SHARPENING_DURATION;
+        pinfo->norm_offset = RC_PID_NORM_OFFSET;
+        pinfo->rinfo = rinfo;
+        pinfo->oldrate = 0;
        /* Sort the rates. This is optimized for the most common case (i.e.
         * almost-sorted CCK+OFDM rates). Kind of bubble-sort with reversed
         * mapping too. */
        for (i = 0; i < sband->n_bitrates; i++) {
                rinfo[i].index = i;
                rinfo[i].rev_index = i;
-                if (pinfo->fast_start)
+                if (RC_PID_FAST_START)
                        rinfo[i].diff = 0;
                else
                        rinfo[i].diff = i * pinfo->norm_offset;
@@ -425,19 +437,6 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local)
                        break;
        }
-        pinfo->target = RC_PID_TARGET_PF;
-        pinfo->sampling_period = RC_PID_INTERVAL;
-        pinfo->coeff_p = RC_PID_COEFF_P;
-        pinfo->coeff_i = RC_PID_COEFF_I;
-        pinfo->coeff_d = RC_PID_COEFF_D;
-        pinfo->smoothing_shift = RC_PID_SMOOTHING_SHIFT;
-        pinfo->sharpen_factor = RC_PID_SHARPENING_FACTOR;
-        pinfo->sharpen_duration = RC_PID_SHARPENING_DURATION;
-        pinfo->norm_offset = RC_PID_NORM_OFFSET;
-        pinfo->fast_start = RC_PID_FAST_START;
-        pinfo->rinfo = rinfo;
-        pinfo->oldrate = 0;
 #ifdef CONFIG_MAC80211_DEBUGFS
        de = &pinfo->dentries;
        de->dir = debugfs_create_dir("rc80211_pid",
@@ -465,9 +464,6 @@ static void *rate_control_pid_alloc(struct ieee80211_local *local)
        de->norm_offset = debugfs_create_u32("norm_offset",
                                             S_IRUSR | S_IWUSR, de->dir,
                                             &pinfo->norm_offset);
-        de->fast_start = debugfs_create_bool("fast_start",
-                                             S_IRUSR | S_IWUSR, de->dir,
-                                             &pinfo->fast_start);
 #endif
        return pinfo;
@@ -479,7 +475,6 @@ static void rate_control_pid_free(void *priv)
 #ifdef CONFIG_MAC80211_DEBUGFS
        struct rc_pid_debugfs_entries *de = &pinfo->dentries;
-        debugfs_remove(de->fast_start);
        debugfs_remove(de->norm_offset);
        debugfs_remove(de->sharpen_duration);
        debugfs_remove(de->sharpen_factor);
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 271cd01d57ae..dd28fb239a60 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -844,9 +844,15 @@ static int tcp_packet(struct nf_conn *ct,
                        /* Attempt to reopen a closed/aborted connection.
                         * Delete this connection and look up again. */
                        write_unlock_bh(&tcp_lock);
-                        if (del_timer(&ct->timeout))
+                        /* Only repeat if we can actually remove the timer.
+                         * Destruction may already be in progress in process
+                         * context and we must give it a chance to terminate.
+                         */
+                        if (del_timer(&ct->timeout)) {
                                ct->timeout.function((unsigned long)ct);
-                        return -NF_REPEAT;
+                                return -NF_REPEAT;
+                        }
+                        return -NF_DROP;
                }
                /* Fall through */
        case TCP_CONNTRACK_IGNORE:
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index fdc14a0d21af..9080c61b71a5 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -584,12 +584,7 @@ list_start:
        rcu_read_unlock();
        genlmsg_end(ans_skb, data);
+        return genlmsg_reply(ans_skb, info);
-        ret_val = genlmsg_reply(ans_skb, info);
-        if (ret_val != 0)
-                goto list_failure;
-        return 0;
 list_retry:
        /* XXX - this limit is a guesstimate */
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index 22c191267808..44be5d5261f4 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -386,11 +386,7 @@ static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
        rcu_read_unlock();
        genlmsg_end(ans_skb, data);
+        return genlmsg_reply(ans_skb, info);
-        ret_val = genlmsg_reply(ans_skb, info);
-        if (ret_val != 0)
-                goto listdef_failure;
-        return 0;
 listdef_failure_lock:
        rcu_read_unlock();
@@ -501,11 +497,7 @@ static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
                goto version_failure;
        genlmsg_end(ans_skb, data);
+        return genlmsg_reply(ans_skb, info);
-        ret_val = genlmsg_reply(ans_skb, info);
-        if (ret_val != 0)
-                goto version_failure;
-        return 0;
 version_failure:
        kfree_skb(ans_skb);
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 52b2611a6eb6..56f80872924e 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -1107,11 +1107,7 @@ static int netlbl_unlabel_list(struct sk_buff *skb, struct genl_info *info)
                goto list_failure;
        genlmsg_end(ans_skb, data);
+        return genlmsg_reply(ans_skb, info);
-        ret_val = genlmsg_reply(ans_skb, info);
-        if (ret_val != 0)
-                goto list_failure;
-        return 0;
 list_failure:
        kfree_skb(ans_skb);
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 0c9d5a6950fe..fcdb45d1071b 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -5899,12 +5899,6 @@ static int sctp_eat_data(const struct sctp_association *asoc,
                return SCTP_IERROR_NO_DATA;
        }
-        /* If definately accepting the DATA chunk, record its TSN, otherwise
-         * wait for renege processing.
-         */
-        if (SCTP_CMD_CHUNK_ULP == deliver)
-                sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_TSN, SCTP_U32(tsn));
        chunk->data_accepted = 1;
        /* Note: Some chunks may get overcounted (if we drop) or overcounted
@@ -5924,6 +5918,9 @@ static int sctp_eat_data(const struct sctp_association *asoc,
         * and discard the DATA chunk.
         */
        if (ntohs(data_hdr->stream) >= asoc->c.sinit_max_instreams) {
+                /* Mark tsn as received even though we drop it */
+                sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_TSN, SCTP_U32(tsn));
                err = sctp_make_op_error(asoc, chunk, SCTP_ERROR_INV_STRM,
                                         &data_hdr->stream,
                                         sizeof(data_hdr->stream));
diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index ce6cda6b6994..a1f654aea268 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -710,6 +710,11 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
        if (!skb)
                goto fail;
+        /* Now that all memory allocations for this chunk succeeded, we
+         * can mark it as received so the tsn_map is updated correctly.
+         */
+        sctp_tsnmap_mark(&asoc->peer.tsn_map, ntohl(chunk->subh.data_hdr->tsn));
        /* First calculate the padding, so we don't inadvertently
         * pass up the wrong length to the user.
         *
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index 0517967a68bf..e6fb21b19b86 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -243,10 +243,10 @@ int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
 }
 EXPORT_SYMBOL_GPL(rpcb_getport_sync);
-static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, int version)
+static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
 {
        struct rpc_message msg = {
-                .rpc_proc = rpcb_next_version[version].rpc_proc,
+                .rpc_proc = proc,
                .rpc_argp = map,
                .rpc_resp = &map->r_port,
        };
@@ -271,6 +271,7 @@ static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbi
 void rpcb_getport_async(struct rpc_task *task)
 {
        struct rpc_clnt *clnt = task->tk_client;
+        struct rpc_procinfo *proc;
        u32 bind_version;
        struct rpc_xprt *xprt = task->tk_xprt;
        struct rpc_clnt *rpcb_clnt;
@@ -280,7 +281,6 @@ void rpcb_getport_async(struct rpc_task *task)
        struct sockaddr *sap = (struct sockaddr *)&addr;
        size_t salen;
        int status;
-        struct rpcb_info *info;
        dprintk("RPC: %5u %s(%s, %u, %u, %d)\n",
                task->tk_pid, __func__,
@@ -313,10 +313,12 @@ void rpcb_getport_async(struct rpc_task *task)
        /* Don't ever use rpcbind v2 for AF_INET6 requests */
        switch (sap->sa_family) {
        case AF_INET:
-                info = rpcb_next_version;
+                proc = rpcb_next_version[xprt->bind_index].rpc_proc;
+                bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
                break;
        case AF_INET6:
-                info = rpcb_next_version6;
+                proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
+                bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
                break;
        default:
                status = -EAFNOSUPPORT;
@@ -324,14 +326,13 @@ void rpcb_getport_async(struct rpc_task *task)
                                task->tk_pid, __func__);
                goto bailout_nofree;
        }
-        if (info[xprt->bind_index].rpc_proc == NULL) {
+        if (proc == NULL) {
                xprt->bind_index = 0;
                status = -EPFNOSUPPORT;
                dprintk("RPC: %5u %s: no more getport versions available\n",
                        task->tk_pid, __func__);
                goto bailout_nofree;
        }
-        bind_version = info[xprt->bind_index].rpc_vers;
        dprintk("RPC: %5u %s: trying rpcbind version %u\n",
                task->tk_pid, __func__, bind_version);
@@ -361,22 +362,20 @@ void rpcb_getport_async(struct rpc_task *task)
        map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR);
        map->r_owner = RPCB_OWNER_STRING;       /* ignored for GETADDR */
-        child = rpcb_call_async(rpcb_clnt, map, xprt->bind_index);
+        child = rpcb_call_async(rpcb_clnt, map, proc);
        rpc_release_client(rpcb_clnt);
        if (IS_ERR(child)) {
                status = -EIO;
+                /* rpcb_map_release() has freed the arguments */
                dprintk("RPC: %5u %s: rpc_run_task failed\n",
                        task->tk_pid, __func__);
-                goto bailout;
+                goto bailout_nofree;
        }
        rpc_put_task(child);
        task->tk_xprt->stat.bind_count++;
        return;
-bailout:
-        kfree(map);
-        xprt_put(xprt);
 bailout_nofree:
        rpcb_wake_rpcbind_waiters(xprt, status);
 bailout_nowake:
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index b976d9ed10e4..04c41504f84c 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -277,9 +277,8 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *
        memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
        x->props.flags = p->flags;
-        if (!x->sel.family)
+        if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
                x->sel.family = p->family;
 }
 /*
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 1dcf9f3d1107..44589088941f 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -278,7 +278,7 @@ static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int gsi)
        ent->fields.remote_irr = 0;
        if (!ent->fields.mask && (ioapic->irr & (1 << gsi)))
-                ioapic_deliver(ioapic, gsi);
+                ioapic_service(ioapic, gsi);
 }
 void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)