GitHub/exynos8895/android_kernel_samsung_universal8895.git
13 years agoperf test: Allow running just a subset of the available tests
Arnaldo Carvalho de Melo [Tue, 29 Nov 2011 14:52:07 +0000 (12:52 -0200)]
perf test: Allow running just a subset of the available tests

To obtain a list of available tests:

[root@emilia linux]# perf test list
 1: vmlinux symtab matches kallsyms
 2: detect open syscall event
 3: detect open syscall event on all cpus
 4: read samples using the mmap interface
 5: parse events tests
[root@emilia linux]#

To list just a subset:

[root@emilia linux]# perf test list syscall
 2: detect open syscall event
 3: detect open syscall event on all cpus
[root@emilia linux]#

To run a subset:

[root@emilia linux]# perf test detect
 2: detect open syscall event: Ok
 3: detect open syscall event on all cpus: Ok
[root@emilia linux]#

Specific tests can be chosen by number:

[root@emilia linux]# perf test 1 3 parse
 1: vmlinux symtab matches kallsyms: Ok
 3: detect open syscall event on all cpus: Ok
 5: parse events tests: Ok
[root@emilia linux]#

Now to write more tests!

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-nqec2145qfxdgimux28aw7v8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evlist: Always do automatic allocation of pollfd and mmap structures
Arnaldo Carvalho de Melo [Tue, 29 Nov 2011 10:05:52 +0000 (08:05 -0200)]
perf evlist: Always do automatic allocation of pollfd and mmap structures

At first tools were required to do that, but while writing the python
bindings to simplify the API I made them auto-allocate when needed.

This just makes record, stat and top use that auto allocation,
simplifying them a bit.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-iokhcvkzzijr3keioubx8hlq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Save some loops using perf_evlist__id2evsel
Arnaldo Carvalho de Melo [Mon, 28 Nov 2011 19:57:40 +0000 (17:57 -0200)]
perf tools: Save some loops using perf_evlist__id2evsel

Since we already ask for PERF_SAMPLE_ID and use it to quickly find the
associated evsel, add handler func + data to struct perf_evsel to avoid
using chains of if(strcmp(event_name)) and also to avoid all the linear
list searches via trace_event_find.

To demonstrate the technique convert 'perf sched' to it:

 # perf sched record sleep 5m

And then:

 Performance counter stats for '/tmp/oldperf sched lat':

        646.929438 task-clock                #    0.999 CPUs utilized
                 9 context-switches          #    0.000 M/sec
                 0 CPU-migrations            #    0.000 M/sec
            20,901 page-faults               #    0.032 M/sec
     1,290,144,450 cycles                    #    1.994 GHz
   <not supported> stalled-cycles-frontend
   <not supported> stalled-cycles-backend
     1,606,158,439 instructions              #    1.24  insns per cycle
       339,088,395 branches                  #  524.151 M/sec
         4,550,735 branch-misses             #    1.34% of all branches

       0.647524759 seconds time elapsed

Versus:

 Performance counter stats for 'perf sched lat':

        473.564691 task-clock                #    0.999 CPUs utilized
                 9 context-switches          #    0.000 M/sec
                 0 CPU-migrations            #    0.000 M/sec
            20,903 page-faults               #    0.044 M/sec
       944,367,984 cycles                    #    1.994 GHz
   <not supported> stalled-cycles-frontend
   <not supported> stalled-cycles-backend
     1,442,385,571 instructions              #    1.53  insns per cycle
       308,383,106 branches                  #  651.195 M/sec
         4,481,784 branch-misses             #    1.45% of all branches

       0.474215751 seconds time elapsed

[root@emilia ~]#

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-1kbzpl74lwi6lavpqke2u2p3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf script: Add comm filtering option
David Ahern [Mon, 21 Nov 2011 17:02:52 +0000 (10:02 -0700)]
perf script: Add comm filtering option

Allows collecting events system wide and then pulling out events for a
specific task name(s). e.g,

    perf script -c gnome-shell,gnome-terminal

Applies on top of:
    https://lkml.org/lkml/2011/11/13/74

v2->v3
- update Documentation

v1->v2
- use comm_list from symbol_conf

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1321894972-24246-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: make -C consistent across commands (for cpu list arg)
David Ahern [Sun, 13 Nov 2011 18:30:08 +0000 (11:30 -0700)]
perf tools: make -C consistent across commands (for cpu list arg)

Currently the meaning of -C varies by perf command: for perf-top,
perf-stat, perf-record it means cpu list. For perf-report it means comm
list. Then perf-annotate, perf-report and perf-script use -c for cpu
list.

Fix annotate, report and script to use -C for cpu list to be consistent
with top, stat and record. This means report needs to use -c for comm
list which does introduce a backward compatibility change.

v1 -> v2
- update perf-script.txt too

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1321209008-7004-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf top: Stop using globals for tool state
Arnaldo Carvalho de Melo [Mon, 28 Nov 2011 11:37:05 +0000 (09:37 -0200)]
perf top: Stop using globals for tool state

Use its 'perf_tool' base class instead.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-i33q40wwvk2zna8fd36ex6sm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Rename perf_event_ops to perf_tool
Arnaldo Carvalho de Melo [Mon, 28 Nov 2011 10:30:20 +0000 (08:30 -0200)]
perf tools: Rename perf_event_ops to perf_tool

To better reflect that it became the base class for all tools, that must
be in each tool struct and where common stuff will be put.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qgpc4msetqlwr8y2k7537cxe@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Resolve machine earlier and pass it to perf_event_ops
Arnaldo Carvalho de Melo [Mon, 28 Nov 2011 09:56:39 +0000 (07:56 -0200)]
perf tools: Resolve machine earlier and pass it to perf_event_ops

Reducing the exposure of perf_session further, so that we can use the
classes in cases where no perf.data file is created.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-stua66dcscsezzrcdugvbmvd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Pass tool context in the the perf_event_ops functions
Arnaldo Carvalho de Melo [Fri, 25 Nov 2011 10:19:45 +0000 (08:19 -0200)]
perf tools: Pass tool context in the the perf_event_ops functions

So that we don't need to have that many globals.

Next steps will remove the 'session' pointer, that in most cases is
not needed.

Then we can rename perf_event_ops to 'perf_tool' that better describes
this class hierarchy.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-wp4djox7x6w1i2bab1pt4xxp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf annotate: Group options in a struct
Arnaldo Carvalho de Melo [Thu, 17 Nov 2011 14:33:21 +0000 (12:33 -0200)]
perf annotate: Group options in a struct

Paving the way to remove these globals when we change the perf_event_ops
to receive as a first parameter a pointer to a perf_event_ops that will
then provide access to perf_annotate via container_of.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xduzibqrdg3h5cttmk6p5wwc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf report: Group options in a struct
Arnaldo Carvalho de Melo [Thu, 17 Nov 2011 14:19:04 +0000 (12:19 -0200)]
perf report: Group options in a struct

Paving the way to remove these globals when we change the perf_event_ops
to receive as a first parameter a pointer to a perf_event_ops that will
then provide access to perf_report via container_of.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-2eh2vi2nb5z3tg1lvoxv09xu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Use evsel->attr.sample_type instead of session->sample_type
Arnaldo Carvalho de Melo [Wed, 16 Nov 2011 19:02:54 +0000 (17:02 -0200)]
perf tools: Use evsel->attr.sample_type instead of session->sample_type

Eventually session->sample_type will go away as we want to support
multiple sample types per session, so use it from the evsel which is a
step in that direction.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-0vwdpjcwbjezw459lw5n3ew1@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf session: Remove superfluous callchain_cursor member
Arnaldo Carvalho de Melo [Sat, 12 Nov 2011 01:10:26 +0000 (23:10 -0200)]
perf session: Remove superfluous callchain_cursor member

Since we have it in evsel->hists.callchain_cursor, remove it from
perf_session.

One more step in disentangling several places from requiring a
perf_session pointer.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-rxr5dj3di7ckyfmnz0naku1z@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf event: perf_event_ops->attr() manipulates only an evlist
Arnaldo Carvalho de Melo [Sat, 12 Nov 2011 00:45:41 +0000 (22:45 -0200)]
perf event: perf_event_ops->attr() manipulates only an evlist

Removing another case where a perf_session is required when processing
events.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ug1wtjbnva4bxwknflkkrlrh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evlist: Introduce id_hdr_size method out of perf_session
Arnaldo Carvalho de Melo [Sat, 12 Nov 2011 00:28:50 +0000 (22:28 -0200)]
perf evlist: Introduce id_hdr_size method out of perf_session

We will need this when not using perf_session in cases like 'perf top'
and strace where no perf.data file is created nor consumed.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-za923wjc41q5xot5vrhuhj3j@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf symbols: Add nr_events to symbol_conf
Arnaldo Carvalho de Melo [Sat, 12 Nov 2011 00:17:32 +0000 (22:17 -0200)]
perf symbols: Add nr_events to symbol_conf

Since symbol__alloc_hists need it, to avoid passing it around in many
functions have it in the symbol_conf struct.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-cwv8ysvpywzjq4v3xtbd4zwv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf ui progress: Fix divide by zero
Arnaldo Carvalho de Melo [Sat, 12 Nov 2011 00:08:07 +0000 (22:08 -0200)]
perf ui progress: Fix divide by zero

Happens in a perf.data file where one of the events had no samples.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-j7st3oyiotvfxqde2nc41kxb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf record: Move 'group' to perf_event_ops
Arnaldo Carvalho de Melo [Fri, 11 Nov 2011 17:12:56 +0000 (15:12 -0200)]
perf record: Move 'group' to perf_event_ops

Will be used in other tools to share the command line parsing code.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-8x0yr77r6lrd2t699s499m8n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf session: Move threads to struct machine
Arnaldo Carvalho de Melo [Wed, 9 Nov 2011 15:24:25 +0000 (13:24 -0200)]
perf session: Move threads to struct machine

The 'machine' abstraction was introduced with 'perf kvm' where we could
have samples for the host and multiple guests, but at the time we ended
up keeping the list of all machines threads all in
session->host_machine.

Move the threads rb_tree to struct machine to separate the namespaces.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-mdg7sm6j3va09vtgj49gbsrp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf record: Move mmap_pages to perf_record_opts
Arnaldo Carvalho de Melo [Wed, 9 Nov 2011 11:16:26 +0000 (09:16 -0200)]
perf record: Move mmap_pages to perf_record_opts

Tools being developed will need this to allow the user to override this
value.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-zydc1yhxfm0z35fuy95bsn1l@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evlist: Handle default value for 'pages' on mmap method
Arnaldo Carvalho de Melo [Wed, 9 Nov 2011 11:10:47 +0000 (09:10 -0200)]
perf evlist: Handle default value for 'pages' on mmap method

Every tool that calls this and allows the user to override the value
needs this logic.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-lwscxpg57xfzahz5dmdfp9uz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evlist: Introduce {prepare,start}_workload refactored from 'perf record'
Arnaldo Carvalho de Melo [Wed, 9 Nov 2011 10:47:15 +0000 (08:47 -0200)]
perf evlist: Introduce {prepare,start}_workload refactored from 'perf record'

So that we can easily start a workload in other tools.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-zdsksd4aphu0nltg2lpwsw3x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evsel: Introduce config attr method
Arnaldo Carvalho de Melo [Tue, 8 Nov 2011 16:41:57 +0000 (14:41 -0200)]
perf evsel: Introduce config attr method

Out of the code in 'perf record', so that we can share option parsing,
etc. Eventually will be used by 'perf top', but first 'trace' will use
it.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-hzjqsgnte1esk90ytq0ap98v@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evlist: Introduce add_tracepoints method
Arnaldo Carvalho de Melo [Sat, 5 Nov 2011 10:41:51 +0000 (08:41 -0200)]
perf evlist: Introduce add_tracepoints method

Convenient way of asking for tracepoint events to be added to an
existing evlist.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-0ylj4wrg54791u0baqb9swbb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf evlist: Introduce perf_evlist__add_attrs
Arnaldo Carvalho de Melo [Fri, 4 Nov 2011 11:10:59 +0000 (09:10 -0200)]
perf evlist: Introduce perf_evlist__add_attrs

Replacing the open coded equivalents in 'perf stat'.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-1btwadnf2tds2g07hsccsdse@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Simplify debugfs mountpoint handling code
Arnaldo Carvalho de Melo [Wed, 16 Nov 2011 16:03:07 +0000 (14:03 -0200)]
perf tools: Simplify debugfs mountpoint handling code

We don't need to have two PATH_MAX char sized arrays holding it, just
one in util/debugfs.c will do.

Also rename debugfs_path to tracing_events_path, as it is not the path
to debugfs, that is debugfs_mountpoint. Both are now accessible.

This will allow accessing this code in the perf python binding without
having to drag in perf.c and util/parse-events.c.

The defaults for these variables are the canonical "/sys/kernel/debug"
and "/sys/kernel/debug/tracing/events/", removing the need for simple
tools to call debugfs_mount(NULL).

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ug9jvtjrsqbluuhqqxpvg30f@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoperf tools: Eliminate duplicate code and use PATH_MAX consistently
Arnaldo Carvalho de Melo [Wed, 16 Nov 2011 14:55:59 +0000 (12:55 -0200)]
perf tools: Eliminate duplicate code and use PATH_MAX consistently

No need for multiple definitions for STR() and die(), also use SuSv2's
PATH_MAX instead of adding MAX_PATH.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qpujjkw7u0bf0tr4wt55cr9y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
13 years agoMerge branch 'core' of git://amd64.org/linux/rric into perf/core
Ingo Molnar [Tue, 15 Nov 2011 10:05:18 +0000 (11:05 +0100)]
Merge branch 'core' of git://amd64.org/linux/rric into perf/core

13 years agoevents: Don't divide events if it has field period
Andrew Vagin [Mon, 7 Nov 2011 12:54:12 +0000 (15:54 +0300)]
events: Don't divide events if it has field period

This patch solves the following problem:

Now some samples may be lost due to throttling. The number of samples is
restricted by sysctl_perf_event_sample_rate/HZ.  A trace event is
divided on some samples according to event's period.  I don't sure, that
we should generate more than one sample on each trace event. I think the
better way to use SAMPLE_PERIOD.

E.g.: I want to trace when a process sleeps. I created a process, which
sleeps for 1ms and for 4ms.  perf got 100 events in both cases.

swapper     0 [000]  1141.371830: sched_stat_sleep: comm=foo pid=1801 delay=1386750 [ns]
swapper     0 [000]  1141.369444: sched_stat_sleep: comm=foo pid=1801 delay=4499585 [ns]

In the first case a kernel want to send 4499585 events and
in the second case it wants to send 1386750 events.
perf-reports shows that process sleeps in both places equal time. It's
bug.

With this patch kernel generates one event on each "sleep" and the time
slice is saved in the field "period". Perf knows how handle it.

Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1320670457-2633428-3-git-send-email-avagin@openvz.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agoperf: Carve out callchain functionality
Borislav Petkov [Sun, 16 Oct 2011 15:15:04 +0000 (17:15 +0200)]
perf: Carve out callchain functionality

Split the callchain code from the perf events core into
a new kernel/events/callchain.c file.

This simplifies a bit the big core.c

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
[keep ctx recursion handling inline and use internal headers]
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1318778104-17152-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agoMerge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Ingo Molnar [Fri, 11 Nov 2011 07:19:37 +0000 (08:19 +0100)]
Merge branch 'tip/perf/core' of git://git./linux/kernel/git/rostedt/linux-trace into perf/core

13 years agox86, perf: Add a build-time sanity test to the x86 decoder
Masami Hiramatsu [Thu, 20 Oct 2011 14:01:09 +0000 (23:01 +0900)]
x86, perf: Add a build-time sanity test to the x86 decoder

Add a sanity test of x86 insn decoder against a stream
of randomly generated input, at build time.

This test is also able to reproduce any bug that might
trigger by allowing the passing of random-seed and
iteration-number to the test, or by passing input
which has invalid byte code.

Changes in V2:
 - Code cleanup.
 - Show how to reproduce the error by insn_sanity test.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: acme@redhat.com
Cc: ming.m.lin@intel.com
Cc: robert.richter@amd.com
Cc: ravitillo@lbl.gov
Cc: yrl.pp-manager.tt@hitachi.com
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20111020140109.20938.92572.stgit@localhost.localdomain
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
Linus Torvalds [Wed, 9 Nov 2011 02:34:16 +0000 (18:34 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/paulg/linux

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  drivers/media: video/a5k6aa is a module and so needs module.h
  mfd: fix build failures in recently added ab5500 code
  hwspinlock/u8500: include linux/module.h
  MTD: MAPS: bcm963xx-flash.c: explicitly include module.h

13 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Wed, 9 Nov 2011 02:33:53 +0000 (18:33 -0800)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md/raid5: STRIPE_ACTIVE has lock semantics, add barriers
  md/raid5: abort any pending parity operations when array fails.

13 years agoMerge branch 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap...
Linus Torvalds [Wed, 9 Nov 2011 02:33:11 +0000 (18:33 -0800)]
Merge branch 'docs-move' of git://git./linux/kernel/git/rdunlap/linux-docs

* 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs: (45 commits)
  DocBook/drm: Clean up a todo-note
  DocBook/drm: `device aware' -> `device-aware'
  DocBook/drm: `(device|driver) specific' -> `(device|driver)-specific'
  DocBook/drm: Clean up the paragraph on framebuffer objects
  DocBook/drm: Use `; otherwise,'
  DocBook/drm: Better flow with `, and then'
  DocBook/drm: Refer to the domain-setting function as a device-specific ioctl
  DocBook/drm: Improve flow of GPU/CPU coherence sentence
  DocBook/drm: Use an <itemizelist> for fundamental GEM operations
  DocBook/drm: Insert a comma
  DocBook/drm: Use a <variablelist> for vblank ioctls
  DocBook/drm: Use an itemizedlist for what an encoder needs to provide
  DocBook/drm: Insert `the' for readability, and change `set' to `setting'
  DocBook/drm: Remove extraneous commas
  DocBook/drm: Use a colon
  DocBook/drm: Clarify `final initialization' via better formatting
  DocBook/drm: Remove redundancy
  DocBook/drm: Insert `it' for smooth reading
  DocBook/drm: The word `so-called'; I do not think it connotes what you think it connotes
  DocBook/drm: Use a singular subject for grammatical cleanliness
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Tue, 8 Nov 2011 23:41:10 +0000 (15:41 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/rostedt/linux-ktest

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest: (21 commits)
  ktest: Evaluate variables entered on the command line
  ktest: Add variable ${PWD}
  ktest: Add another monitor flush before installing kernel
  ktest: Do not opencode reboot in grub setting
  ktest: Add processing of complex conditionals
  ktest: Fix parsing of config section lines
  ktest: Sort make_min_config configs by dependecies
  ktest: Add DEFINED keyword for IF statements
  ktest: Add OVERRIDE keyword to DEFAULTS section
  ktest: Consolidate TEST_TYPE and DEFAULT code
  ktest: Add INCLUDE keyword to include other config files
  ktest: Let IF keyword take comparisons
  ktest: Add IF and ELSE to config sections
  ktest: Do not reboot on config or build issues
  ktest: Add option REBOOT_SUCCESS_LINE to stop waiting after a reboot
  ktest: Add NO_INSTALL option to not install for a test
  ktest: Fail when grub menu not found
  ktest: Include monitor in reboot code
  ktest: Only need to save .config when doing mrproper
  ktest: Create outputdir if it does not exist
  ...

13 years agoMerge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Tue, 8 Nov 2011 22:24:18 +0000 (14:24 -0800)]
Merge branch 'pm-fixes' of git://git./linux/kernel/git/rafael/linux-pm

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / OPP: Use ERR_CAST instead of ERR_PTR(PTR_ERR())
  PM / devfreq: fix private_data
  Documentation: Fix typo in freezer-subsystem.txt
  PM / QoS: Set cpu_dma_pm_qos->name

13 years agoPM / OPP: Use ERR_CAST instead of ERR_PTR(PTR_ERR())
Thomas Meyer [Tue, 8 Nov 2011 21:34:00 +0000 (22:34 +0100)]
PM / OPP: Use ERR_CAST instead of ERR_PTR(PTR_ERR())

Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))

[The semantic patch that makes this change is available
 in scripts/coccinelle/api/err_cast.cocci.

 More information about semantic patching is available at
 http://coccinelle.lip6.fr/]

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock
Linus Torvalds [Tue, 8 Nov 2011 20:50:54 +0000 (12:50 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/ohad/hwspinlock

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock:
  hwspinlock/u8500: fix build error due to undefined label
  hwspinlock: Don't return a value in __hwspin_unlock

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Tue, 8 Nov 2011 20:50:02 +0000 (12:50 -0800)]
Merge git://git./linux/kernel/git/davem/sparc

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: Hook up process_vm_{readv,writev} syscalls.

13 years agox86 platform drivers: add POWER_SUPPLY to selected drivers for Dell
Linus Torvalds [Tue, 8 Nov 2011 20:49:29 +0000 (12:49 -0800)]
x86 platform drivers: add POWER_SUPPLY to selected drivers for Dell

The Kconfig loop detection goes crazy without this.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agox86 platform drivers: make Dell laptop driver select needed LED support
Linus Torvalds [Tue, 8 Nov 2011 20:17:25 +0000 (12:17 -0800)]
x86 platform drivers: make Dell laptop driver select needed LED support

Otherwise we get compile errors like this:

  ERROR: "led_classdev_unregister" [drivers/platform/x86/dell-laptop.ko] undefined!
  ERROR: "led_classdev_register" [drivers/platform/x86/dell-laptop.ko] undefined!
  make[1]: *** [__modpost] Error 1
  make: *** [modules] Error 2

when the dell-laptop support is enabled without the necessary LED
support being enabled.

Reported-by: Alessandro Suardi <alessandro.suardi@gmail.com>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/media: video/a5k6aa is a module and so needs module.h
Paul Gortmaker [Tue, 8 Nov 2011 19:56:50 +0000 (14:56 -0500)]
drivers/media: video/a5k6aa is a module and so needs module.h

This file uses core functions like module_init() and module_exit()
and so it explicitly needs to include the module.h header.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
13 years agon_gsm: Fix timings
Alan Cox [Tue, 8 Nov 2011 18:02:10 +0000 (18:02 +0000)]
n_gsm: Fix timings

Alek Du reported that the code erroneously applies time to jiffies
conversions twice to the t1 and t2 values. In normal use on a modem link
this cases no visible problem but on a slower link it will break as with
HZ=1000 as is typical we are running t1/t2 ten times too fast.

Alek's original patch removed the conversion from the timer setting but we
in fact have to be more careful as the contents of t1/t2 are visible via
the device API and we thus need to correct the constants.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branch 'perf/core' into oprofile/master
Robert Richter [Tue, 8 Nov 2011 14:52:15 +0000 (15:52 +0100)]
Merge branch 'perf/core' into oprofile/master

Merge reason: Resolve conflicts with Don's NMI rework:

    commit 9c48f1c629ecfa114850c03f875c6691003214de
    Author: Don Zickus <dzickus@redhat.com>
    Date:   Fri Sep 30 15:06:21 2011 -0400
    x86, nmi: Wire up NMI handlers to new routines

Conflicts:
arch/x86/oprofile/nmi_timer_int.c

Signed-off-by: Robert Richter <robert.richter@amd.com>
13 years agohwspinlock/u8500: fix build error due to undefined label
Axel Lin [Sun, 6 Nov 2011 13:14:16 +0000 (21:14 +0800)]
hwspinlock/u8500: fix build error due to undefined label

Fix below build error:

  CC      drivers/hwspinlock/u8500_hsem.o
drivers/hwspinlock/u8500_hsem.c: In function 'u8500_hsem_probe':
drivers/hwspinlock/u8500_hsem.c:113: error: label 'free_state' used but not defined

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
13 years agohwspinlock: Don't return a value in __hwspin_unlock
Axel Lin [Thu, 3 Nov 2011 06:45:48 +0000 (14:45 +0800)]
hwspinlock: Don't return a value in __hwspin_unlock

Fix below build warning:

  CC      arch/arm/mach-omap2/hwspinlock.o
In file included from arch/arm/mach-omap2/hwspinlock.c:22:
include/linux/hwspinlock.h: In function '__hwspin_unlock':
include/linux/hwspinlock.h:121: warning: 'return' with a value, in function returning void

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
13 years agomd/raid5: STRIPE_ACTIVE has lock semantics, add barriers
Dan Williams [Tue, 8 Nov 2011 05:22:06 +0000 (16:22 +1100)]
md/raid5: STRIPE_ACTIVE has lock semantics, add barriers

All updates that occur under STRIPE_ACTIVE should be globally visible
when STRIPE_ACTIVE clears.  test_and_set_bit() implies a barrier, but
clear_bit() does not.

This is suitable for 3.1-stable.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
13 years agomd/raid5: abort any pending parity operations when array fails.
NeilBrown [Tue, 8 Nov 2011 05:22:01 +0000 (16:22 +1100)]
md/raid5: abort any pending parity operations when array fails.

When the number of failed devices exceeds the allowed number
we must abort any active parity operations (checks or updates) as they
are no longer meaningful, and can lead to a BUG_ON in
handle_parity_checks6.

This bug was introduce by commit 6c0069c0ae9659e3a91b68eaed06a5c6c37f45c8
in 2.6.29.

Reported-by: Manish Katiyar <mkatiyar@gmail.com>
Tested-by: Manish Katiyar <mkatiyar@gmail.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
13 years agomfd: fix build failures in recently added ab5500 code
Paul Gortmaker [Mon, 7 Nov 2011 16:17:04 +0000 (11:17 -0500)]
mfd: fix build failures in recently added ab5500 code

These files had implicit dependencies on modular support
which now show up as build failures with the module cleanup
work merged to mainline.

Reported-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
13 years agohwspinlock/u8500: include linux/module.h
Axel Lin [Sun, 6 Nov 2011 13:16:51 +0000 (21:16 +0800)]
hwspinlock/u8500: include linux/module.h

Include module.h to fix below build error:

  CC      drivers/hwspinlock/u8500_hsem.o
drivers/hwspinlock/u8500_hsem.c:177: error: 'THIS_MODULE' undeclared here (not in a function)
 [...]
drivers/hwspinlock/u8500_hsem.c:196: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR'
drivers/hwspinlock/u8500_hsem.c:196: warning: function declaration isn't a prototype
make[2]: *** [drivers/hwspinlock/u8500_hsem.o] Error 1
make[1]: *** [drivers/hwspinlock] Error 2
make: *** [drivers] Error 2

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
13 years agoMTD: MAPS: bcm963xx-flash.c: explicitly include module.h
Jonas Gorski [Sun, 6 Nov 2011 11:57:31 +0000 (12:57 +0100)]
MTD: MAPS: bcm963xx-flash.c: explicitly include module.h

module.h was previously implicitly included through mtd/mtd.h.

Fixes the following build failure after the module.h cleanup:

  CC      drivers/mtd/maps/bcm963xx-flash.o
drivers/mtd/maps/bcm963xx-flash.c: In function 'bcm963xx_probe':
drivers/mtd/maps/bcm963xx-flash.c:208:29: error: 'THIS_MODULE' undeclared (first use in this function)
 [...]
drivers/mtd/maps/bcm963xx-flash.c:276:1: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR'
drivers/mtd/maps/bcm963xx-flash.c:276:15: warning: function declaration isn't a prototype
make[7]: *** [drivers/mtd/maps/bcm963xx-flash.o] Error 1

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
13 years agoLinux 3.2-rc1
Linus Torvalds [Tue, 8 Nov 2011 00:16:02 +0000 (16:16 -0800)]
Linux 3.2-rc1

.. with new name.  Because nothing says "really solid kernel release"
like naming it after an extinct animal that just happened to be in the
news lately.

13 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux...
Linus Torvalds [Tue, 8 Nov 2011 00:14:26 +0000 (16:14 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/tmlind/linux-omap

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (31 commits)
  ARM: OMAP: Fix export.h or module.h includes
  ARM: OMAP: omap_device: Include linux/export.h
  ARM: OMAP2: Fix H4 matrix keyboard warning
  ARM: OMAP1: Remove unused omap-alsa.h
  ARM: OMAP1: Fix warnings about enabling 32 KiHz timer
  ARM: OMAP2+: timer: Remove omap_device_pm_latency
  ARM: OMAP2+: clock data: Remove redundant timer clkdev
  ARM: OMAP: Devkit8000: Remove double omap_mux_init_gpio
  ARM: OMAP: usb: musb: OMAP: Delete unused function
  MAINTAINERS: Update linux-omap git repository
  ARM: OMAP: change get_context_loss_count ret value to int
  ARM: OMAP4: hsmmc: configure SDMMC1_DR0 properly
  ARM: OMAP4: hsmmc: Fix Pbias configuration on regulator OFF
  ARM: OMAP3: hwmod: fix variant registration and remove SmartReflex from common list
  ARM: OMAP: I2C: Fix omap_register_i2c_bus() return value on success
  ARM: OMAP: dmtimer: Include linux/module.h
  ARM: OMAP2+: l3-noc: Include linux/module.h
  ARM: OMAP2+: devices: Fixes for McPDM
  ARM: OMAP: Fix errors and warnings when building for one board
  ARM: OMAP3: PM: restrict erratum i443 handling to OMAP3430 only
  ...

13 years agoVFS: we need to set LOOKUP_JUMPED on mountpoint crossing
Al Viro [Mon, 7 Nov 2011 21:21:26 +0000 (21:21 +0000)]
VFS: we need to set LOOKUP_JUMPED on mountpoint crossing

Mountpoint crossing is similar to following procfs symlinks - we do
not get ->d_revalidate() called for dentry we have arrived at, with
unpleasant consequences for NFS4.

Simple way to reproduce the problem in mainline:

    cat >/tmp/a.c <<'EOF'
    #include <unistd.h>
    #include <fcntl.h>
    #include <stdio.h>
    main()
    {
            struct flock fl = {.l_type = F_RDLCK, .l_whence = SEEK_SET, .l_len = 1};
            if (fcntl(0, F_SETLK, &fl))
                    perror("setlk");
    }
    EOF
    cc /tmp/a.c -o /tmp/test

then on nfs4:

    mount --bind file1 file2
    /tmp/test < file1 # ok
    /tmp/test < file2 # spews "setlk: No locks available"...

What happens is the missing call of ->d_revalidate() after mountpoint
crossing and that's where NFS4 would issue OPEN request to server.

The fix is simple - treat mountpoint crossing the same way we deal with
following procfs-style symlinks.  I.e.  set LOOKUP_JUMPED...

Cc: stable@kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoPM / devfreq: fix private_data
Jonathan Corbet [Mon, 7 Nov 2011 22:54:53 +0000 (23:54 +0100)]
PM / devfreq: fix private_data

The "private_date" field in struct devfreq_dev_status almost certainly
wants to be "private_data"; since there are no in-tree users of this
functionality, now seems like an easy time to make the fix.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoDocumentation: Fix typo in freezer-subsystem.txt
Rafael J. Wysocki [Sun, 6 Nov 2011 21:00:20 +0000 (22:00 +0100)]
Documentation: Fix typo in freezer-subsystem.txt

Fix a typo in Documentation/cgroups/freezer-subsystem.txt.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
13 years agoPM / QoS: Set cpu_dma_pm_qos->name
Dominik Brodowski [Sun, 6 Nov 2011 20:54:12 +0000 (21:54 +0100)]
PM / QoS: Set cpu_dma_pm_qos->name

Since commit 4a31a334, the name of this misc device is not initialized,
which leads to a funny device named /dev/(null) being created and
/proc/misc containing an entry with just a number but no name. The latter
leads to complaints by cryptsetup, which caused me to investigate this
matter.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 7 Nov 2011 20:38:11 +0000 (12:38 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf top: Fix live annotation in the --stdio interface
  perf top tui: Don't recalc column widths considering just the first page
  perf report: Add progress bar when processing time ordered events
  perf hists browser: Warn about lost events
  perf tools: Fix a typo of command name as trace-cmd
  perf hists: Fix recalculation of total_period when sorting entries
  perf header: Fix build on old systems
  perf ui browser: Handle K_RESIZE in dialog windows
  perf ui browser: No need to switch char sets that often
  perf hists browser: Use K_TIMER
  perf ui: Rename ui__warning_paranoid to ui__error_paranoid
  perf ui: Reimplement the popup windows using libslang
  perf ui: Reimplement ui__popup_menu using ui__browser
  perf ui: Reimplement ui_helpline using libslang
  perf ui: Improve handling sigwinch a bit
  perf ui progress: Reimplement using slang
  perf evlist: Fix grouping of multiple events

13 years agoMerge branch 'fixes-modulesplit' into fixes
Tony Lindgren [Mon, 7 Nov 2011 20:27:23 +0000 (12:27 -0800)]
Merge branch 'fixes-modulesplit' into fixes

13 years agoARM: OMAP: Fix export.h or module.h includes
Tony Lindgren [Mon, 7 Nov 2011 20:27:10 +0000 (12:27 -0800)]
ARM: OMAP: Fix export.h or module.h includes

Commit 32aaeffbd4a7457bf2f7448b33b5946ff2a960eb (Merge branch
'modsplit-Oct31_2011'...) caused some build errors. Fix these
and make sure we always have export.h or module.h included
for MODULE_ and EXPORT_SYMBOL users:

$ grep -rl ^MODULE_ arch/arm/*omap*/*.c | xargs \
  grep -L linux/module.h
  arch/arm/mach-omap2/dsp.c
  arch/arm/mach-omap2/mailbox.c
  arch/arm/mach-omap2/omap-iommu.c
  arch/arm/mach-omap2/smartreflex.c

Also check we either have export.h or module.h included
for the files exporting symbols:

$ grep -rl EXPORT_SYMBOL arch/arm/*omap*/*.c | xargs \
  grep -L linux/export.h | xargs grep -L linux/module.h

Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoARM: OMAP: omap_device: Include linux/export.h
Axel Lin [Mon, 7 Nov 2011 20:27:10 +0000 (12:27 -0800)]
ARM: OMAP: omap_device: Include linux/export.h

Include linux/export.h to fix below build warning:

  CC      arch/arm/plat-omap/omap_device.o
arch/arm/plat-omap/omap_device.c:1055: warning: data definition has no type or storage class
arch/arm/plat-omap/omap_device.c:1055: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
arch/arm/plat-omap/omap_device.c:1055: warning: parameter names (without types) in function declaration

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Mon, 7 Nov 2011 18:55:33 +0000 (10:55 -0800)]
Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (47 commits)
  forcedeth: fix a few sparse warnings (variable shadowing)
  forcedeth: Improve stats counters
  forcedeth: remove unneeded stats updates
  forcedeth: Acknowledge only interrupts that are being processed
  forcedeth: fix race when unloading module
  MAINTAINERS/rds: update maintainer
  wanrouter: Remove kernel_lock annotations
  usbnet: fix oops in usbnet_start_xmit
  ixgbe: Fix compile for kernel without CONFIG_PCI_IOV defined
  etherh: Add MAINTAINERS entry for etherh
  bonding: comparing a u8 with -1 is always false
  sky2: fix regression on Yukon Optima
  netlink: clarify attribute length check documentation
  netlink: validate NLA_MSECS length
  i825xx:xscale:8390:freescale: Fix Kconfig dependancies
  macvlan: receive multicast with local address
  tg3: Update version to 3.121
  tg3: Eliminate timer race with reset_task
  tg3: Schedule at most one tg3_reset_task run
  tg3: Obtain PCI function number from device
  ...

13 years agovfs: d_invalidate() should leave mountpoints alone
Al Viro [Mon, 7 Nov 2011 16:39:57 +0000 (16:39 +0000)]
vfs: d_invalidate() should leave mountpoints alone

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agotracing/latency: Fix header output for latency tracers
Jiri Olsa [Mon, 7 Nov 2011 15:08:49 +0000 (16:08 +0100)]
tracing/latency: Fix header output for latency tracers

In case the the graph tracer (CONFIG_FUNCTION_GRAPH_TRACER) or even the
function tracer (CONFIG_FUNCTION_TRACER) are not set, the latency tracers
do not display proper latency header.

The involved/fixed latency tracers are:
        wakeup_rt
        wakeup
        preemptirqsoff
        preemptoff
        irqsoff

The patch adds proper handling of tracer configuration options for latency
tracers, and displaying correct header info accordingly.

* The current output (for wakeup tracer) with both graph and function
  tracers disabled is:

  # tracer: wakeup
  #
    <idle>-0       0d.h5    1us+:      0:120:R   + [000]     7:  0:R watchdog/0
    <idle>-0       0d.h5    3us+: ttwu_do_activate.clone.1 <-try_to_wake_up
    ...

* The fixed output is:

  # tracer: wakeup
  #
  # wakeup latency trace v1.1.5 on 3.1.0-tip+
  # --------------------------------------------------------------------
  # latency: 55 us, #4/4, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
  #    -----------------
  #    | task: migration/0-6 (uid:0 nice:0 policy:1 rt_prio:99)
  #    -----------------
  #
  #                  _------=> CPU#
  #                 / _-----=> irqs-off
  #                | / _----=> need-resched
  #                || / _---=> hardirq/softirq
  #                ||| / _--=> preempt-depth
  #                |||| /     delay
  #  cmd     pid   ||||| time  |   caller
  #     \   /      |||||  \    |   /
       cat-1129    0d..4    1us :   1129:120:R   + [000]     6:  0:R migration/0
       cat-1129    0d..4    2us+: ttwu_do_activate.clone.1 <-try_to_wake_up

* The current output (for wakeup tracer) with only function
  tracer enabled is:

  # tracer: wakeup
  #
       cat-1140    0d..4    1us+:   1140:120:R   + [000]     6:  0:R migration/0
       cat-1140    0d..4    2us : ttwu_do_activate.clone.1 <-try_to_wake_up

* The fixed output is:
  # tracer: wakeup
  #
  # wakeup latency trace v1.1.5 on 3.1.0-tip+
  # --------------------------------------------------------------------
  # latency: 207 us, #109/109, CPU#1 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)
  #    -----------------
  #    | task: watchdog/1-12 (uid:0 nice:0 policy:1 rt_prio:99)
  #    -----------------
  #
  #                  _------=> CPU#
  #                 / _-----=> irqs-off
  #                | / _----=> need-resched
  #                || / _---=> hardirq/softirq
  #                ||| / _--=> preempt-depth
  #                |||| /     delay
  #  cmd     pid   ||||| time  |   caller
  #     \   /      |||||  \    |   /
    <idle>-0       1d.h5    1us+:      0:120:R   + [001]    12:  0:R watchdog/1
    <idle>-0       1d.h5    3us : ttwu_do_activate.clone.1 <-try_to_wake_up

Link: http://lkml.kernel.org/r/20111107150849.GE1807@m.brq.redhat.com
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
13 years agoftrace: Fix hash record accounting bug
Steven Rostedt [Sat, 5 Nov 2011 00:32:39 +0000 (20:32 -0400)]
ftrace: Fix hash record accounting bug

If the set_ftrace_filter is cleared by writing just whitespace to
it, then the filter hash refcounts will be decremented but not
updated. This causes two bugs:

1) No functions will be enabled for tracing when they all should be

2) If the users clears the set_ftrace_filter twice, it will crash ftrace:

------------[ cut here ]------------
WARNING: at /home/rostedt/work/git/linux-trace.git/kernel/trace/ftrace.c:1384 __ftrace_hash_rec_update.part.27+0x157/0x1a7()
Modules linked in:
Pid: 2330, comm: bash Not tainted 3.1.0-test+ #32
Call Trace:
 [<ffffffff81051828>] warn_slowpath_common+0x83/0x9b
 [<ffffffff8105185a>] warn_slowpath_null+0x1a/0x1c
 [<ffffffff810ba362>] __ftrace_hash_rec_update.part.27+0x157/0x1a7
 [<ffffffff810ba6e8>] ? ftrace_regex_release+0xa7/0x10f
 [<ffffffff8111bdfe>] ? kfree+0xe5/0x115
 [<ffffffff810ba51e>] ftrace_hash_move+0x2e/0x151
 [<ffffffff810ba6fb>] ftrace_regex_release+0xba/0x10f
 [<ffffffff8112e49a>] fput+0xfd/0x1c2
 [<ffffffff8112b54c>] filp_close+0x6d/0x78
 [<ffffffff8113a92d>] sys_dup3+0x197/0x1c1
 [<ffffffff8113a9a6>] sys_dup2+0x4f/0x54
 [<ffffffff8150cac2>] system_call_fastpath+0x16/0x1b
---[ end trace 77a3a7ee73794a02 ]---

Link: http://lkml.kernel.org/r/20111101141420.GA4918@debian
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
13 years agoforcedeth: fix a few sparse warnings (variable shadowing)
david decotigny [Sat, 5 Nov 2011 14:38:24 +0000 (14:38 +0000)]
forcedeth: fix a few sparse warnings (variable shadowing)

This fixes the following sparse warnings:
drivers/net/ethernet/nvidia/forcedeth.c:2113:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2102:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2155:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2102:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2227:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2215:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2271:7: warning: symbol 'size' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2215:6: originally declared here
drivers/net/ethernet/nvidia/forcedeth.c:2986:20: warning: symbol 'addr' shadows an earlier one
drivers/net/ethernet/nvidia/forcedeth.c:2963:6: originally declared here

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoforcedeth: Improve stats counters
Mandeep Baines [Sat, 5 Nov 2011 14:38:23 +0000 (14:38 +0000)]
forcedeth: Improve stats counters

Rx byte count was off; instead use the hardware's count.  Tx packet
count was counting pre-TSO packets; instead count on-the-wire packets.
Report hardware dropped frame count as rx_fifo_errors.

- The count of transmitted packets reported by the forcedeth driver
  reports pre-TSO (TCP Segmentation Offload) packet counts and not the
  count of the number of packets sent on the wire. This change fixes
  the forcedeth driver to report the correct count. Fixed the code by
  copying the count stored in the NIC H/W to the value reported by the
  driver.

- Count rx_drop_frame errors as rx_fifo_errors:
  We see a lot of rx_drop_frame errors if we disable the rx bottom-halves
  for too long.  Normally, rx_fifo_errors would be counted in this case.
  The rx_drop_frame error count is private to forcedeth and is not
  reported by ifconfig or sysfs.  The rx_fifo_errors count is currently
  unused in the forcedeth driver.  It is reported by ifconfig as overruns.
  This change reports rx_drop_frame errors as rx_fifo_errors.

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoforcedeth: remove unneeded stats updates
david decotigny [Sat, 5 Nov 2011 14:38:22 +0000 (14:38 +0000)]
forcedeth: remove unneeded stats updates

Function ndo_get_stats() updates most of the stats from hardware
registers, making the manual updates un-needed. This change removes
these manual updates. Main exception is rx_missed_errors which needs
manual update.

Another exception is rx_packets, still updated manually in this commit
to make sure this patch doesn't change behavior of driver. This will
be addressed by a future patch.

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoforcedeth: Acknowledge only interrupts that are being processed
Mike Ditto [Sat, 5 Nov 2011 14:38:21 +0000 (14:38 +0000)]
forcedeth: Acknowledge only interrupts that are being processed

This is to avoid a race, accidentally acknowledging an interrupt that
we didn't notice and won't immediately process.  This is based solely
on code inspection; it is not known if there was an actual bug here.

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoforcedeth: fix race when unloading module
david decotigny [Sat, 5 Nov 2011 14:38:20 +0000 (14:38 +0000)]
forcedeth: fix race when unloading module

When forcedeth module is unloaded, there exists a path that can lead
to mod_timer() after del_timer_sync(), causing an oops. This patch
short-circuits this unneeded path, which originates in
nv_get_ethtool_stats().

Tested:
  x86_64 16-way + 3 ethtool -S infinite loops + 100Mbps incoming traffic
  + rmmod/modprobe/ifconfig in a loop

Initial-Author: Salman Qazi <sqazi@google.com>
Discussion: http://patchwork.ozlabs.org/patch/123548/

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agodevice-mapper: using EXPORT_SYBOL in dm-space-map-checker.c needs export.h
Stephen Rothwell [Tue, 1 Nov 2011 09:27:43 +0000 (20:27 +1100)]
device-mapper: using EXPORT_SYBOL in dm-space-map-checker.c needs export.h

Reported-by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodevice-mapper: dm-bufio.c needs to include module.h
Stephen Rothwell [Tue, 1 Nov 2011 07:30:49 +0000 (18:30 +1100)]
device-mapper: dm-bufio.c needs to include module.h

since it uses the module facilities.

Reported-by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/md: change module.h -> export.h in persistent-data/dm-*
Paul Gortmaker [Wed, 28 Sep 2011 22:29:32 +0000 (18:29 -0400)]
drivers/md: change module.h -> export.h in persistent-data/dm-*

For the files which are not themselves modular, we can change
them to include only the smaller export.h since all they are
doing is looking for EXPORT_SYMBOL.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoarm: Add export.h to recently added files for EXPORT_SYMBOL
Paul Gortmaker [Sun, 9 Oct 2011 03:24:48 +0000 (23:24 -0400)]
arm: Add export.h to recently added files for EXPORT_SYMBOL

These files didn't exist at the time of the module.h split, and
so were not fixed by the commits on that baseline.  Since they use
the EXPORT_SYMBOL and/or THIS_MODULE macros, they will need the
new export.h file included that provides them.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMAINTAINERS/rds: update maintainer
Or Gerlitz [Mon, 7 Nov 2011 18:28:20 +0000 (13:28 -0500)]
MAINTAINERS/rds: update maintainer

update for the actual maintainer

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agowanrouter: Remove kernel_lock annotations
Richard Weinberger [Mon, 7 Nov 2011 18:27:30 +0000 (13:27 -0500)]
wanrouter: Remove kernel_lock annotations

The BKL is gone, these annotations are useless.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agousbnet: fix oops in usbnet_start_xmit
Konstantin Khlebnikov [Mon, 7 Nov 2011 05:54:58 +0000 (05:54 +0000)]
usbnet: fix oops in usbnet_start_xmit

This patch fixes the bug added in commit v3.1-rc7-1055-gf9b491e
SKB can be NULL at this point, at least for cdc-ncm.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoixgbe: Fix compile for kernel without CONFIG_PCI_IOV defined
Rose, Gregory V [Mon, 7 Nov 2011 07:44:17 +0000 (07:44 +0000)]
ixgbe: Fix compile for kernel without CONFIG_PCI_IOV defined

Fix compiler errors and warnings with CONFIG_PCI_IOV defined and not
defined.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Linus Torvalds [Mon, 7 Nov 2011 18:13:52 +0000 (10:13 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  cpuidle: Single/Global registration of idle states
  cpuidle: Split cpuidle_state structure and move per-cpu statistics fields
  cpuidle: Remove CPUIDLE_FLAG_IGNORE and dev->prepare()
  cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state
  ACPI: Fix CONFIG_ACPI_DOCK=n compiler warning
  ACPI: Export FADT pm_profile integer value to userspace
  thermal: Prevent polling from happening during system suspend
  ACPI: Drop ACPI_NO_HARDWARE_INIT
  ACPI atomicio: Convert width in bits to bytes in __acpi_ioremap_fast()
  PNPACPI: Simplify disabled resource registration
  ACPI: Fix possible recursive locking in hwregs.c
  ACPI: use kstrdup()
  mrst pmu: update comment
  tools/power turbostat: less verbose debugging

13 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Mon, 7 Nov 2011 18:01:56 +0000 (10:01 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (40 commits)
  vmwgfx: Snoop DMA transfers with non-covering sizes
  vmwgfx: Move the prefered mode first in the list
  vmwgfx: Unreference surface on cursor error path
  vmwgfx: Free prefered mode on error path
  vmwgfx: Use pointer return error codes
  vmwgfx: Fix hw cursor position
  vmwgfx: Infrastructure for explicit placement
  vmwgfx: Make the preferred autofit mode have a 60Hz vrefresh
  vmwgfx: Remove screen object active list
  vmwgfx: Screen object cleanups
  drm/radeon/kms: consolidate GART code, fix segfault after GPU lockup V2
  drm/radeon/kms: don't poll forever if MC GDDR link training fails
  drm/radeon/kms: fix DP setup on TRAVIS bridges
  drm/radeon/kms: set HPD polarity in hpd_init()
  drm/radeon/kms: add MSI module parameter
  drm/radeon/kms: Add MSI quirk for Dell RS690
  drm/radeon/kms: Add MSI quirk for HP RS690
  drm/radeon/kms: split MSI check into a separate function
  vmwgfx: Reinstate the update_layout ioctl
  drm/radeon/kms: always do extended edid probe
  ...

13 years agoMerge branch 'urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 7 Nov 2011 17:59:02 +0000 (09:59 -0800)]
Merge branch 'urgent-for-linus' of git://git./linux/kernel/git/wfg/linux

* 'urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  writeback: fix uninitialized task_ratelimit

13 years agoMerge git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Mon, 7 Nov 2011 17:56:22 +0000 (09:56 -0800)]
Merge git://git.samba.org/sfrench/cifs-2.6

* git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Cleanup byte-range locking code style
  CIFS: Simplify setlk error handling for mandatory locking

13 years agoMerge git://git.infradead.org/mtd-2.6
Linus Torvalds [Mon, 7 Nov 2011 17:11:16 +0000 (09:11 -0800)]
Merge git://git.infradead.org/mtd-2.6

* git://git.infradead.org/mtd-2.6: (226 commits)
  mtd: tests: annotate as DANGEROUS in Kconfig
  mtd: tests: don't use mtd0 as a default
  mtd: clean up usage of MTD_DOCPROBE_ADDRESS
  jffs2: add compr=lzo and compr=zlib options
  jffs2: implement mount option parsing and compression overriding
  mtd: nand: initialize ops.mode
  mtd: provide an alias for the redboot module name
  mtd: m25p80: don't probe device which has status of 'disabled'
  mtd: nand_h1900 never worked
  mtd: Add DiskOnChip G3 support
  mtd: m25p80: add EON flash EN25Q32B into spi flash id table
  mtd: mark block device queue as non-rotational
  mtd: r852: make r852_pm_ops static
  mtd: m25p80: add support for at25df321a spi data flash
  mtd: mxc_nand: preset_v1_v2: unlock all NAND flash blocks
  mtd: nand: switch `check_pattern()' to standard `memcmp()'
  mtd: nand: invalidate cache on unaligned reads
  mtd: nand: do not scan bad blocks with NAND_BBT_NO_OOB set
  mtd: nand: wait to set BBT version
  mtd: nand: scrub BBT on ECC errors
  ...

Fix up trivial conflicts:
 - arch/arm/mach-at91/board-usb-a9260.c
Merged into board-usb-a926x.c
 - drivers/mtd/maps/lantiq-flash.c
add_mtd_partitions -> mtd_device_register vs changed to use
mtd_device_parse_register.

13 years agoMerge branch 'linux-next' of git://git.infradead.org/ubifs-2.6
Linus Torvalds [Mon, 7 Nov 2011 16:52:19 +0000 (08:52 -0800)]
Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

* 'linux-next' of git://git.infradead.org/ubifs-2.6:
  UBIFS: fix the dark space calculation
  UBIFS: introduce a helper to dump scanning info

13 years agoperf: Fix parsing of __print_flags() in TP_printk()
Steven Rostedt [Fri, 4 Nov 2011 20:32:25 +0000 (16:32 -0400)]
perf: Fix parsing of __print_flags() in TP_printk()

A update is made to the sched:sched_switch event that adds some
logic to the first parameter of the __print_flags() that shows the
state of tasks. This change cause perf to fail parsing the flags.

A simple fix is needed to have the parser be able to process ops
within the argument.

Cc: stable@vger.kernel.org
Reported-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
13 years agojump_label: jump_label_inc may return before the code is patched
Gleb Natapov [Tue, 18 Oct 2011 17:55:51 +0000 (19:55 +0200)]
jump_label: jump_label_inc may return before the code is patched

If cpu A calls jump_label_inc() just after atomic_add_return() is
called by cpu B, atomic_inc_not_zero() will return value greater then
zero and jump_label_inc() will return to a caller before jump_label_update()
finishes its job on cpu B.

Link: http://lkml.kernel.org/r/20111018175551.GH17571@redhat.com
Cc: stable@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
13 years agoftrace: Remove force undef config value left for testing
Steven Rostedt [Fri, 4 Nov 2011 14:45:23 +0000 (10:45 -0400)]
ftrace: Remove force undef config value left for testing

A forced undef of a config value was used for testing and was
accidently left in during the final commit. This causes x86 to
run slower than needed while running function tracing as well
as causes the function graph selftest to fail when DYNMAIC_FTRACE
is not set. This is because the code in MCOUNT expects the ftrace
code to be processed with the config value set that happened to
be forced not set.

The forced config option was left in by:
    commit 6331c28c962561aee59e5a493b7556a4bb585957
    ftrace: Fix dynamic selftest failure on some archs

Link: http://lkml.kernel.org/r/20111102150255.GA6973@debian
Cc: stable@vger.kernel.org
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
13 years agolockdep: Show subclass in pretty print of lockdep output
Steven Rostedt [Thu, 3 Nov 2011 00:24:16 +0000 (20:24 -0400)]
lockdep: Show subclass in pretty print of lockdep output

The pretty print of the lockdep debug splat uses just the lock name
to show how the locking scenario happens. But when it comes to
nesting locks, the output becomes confusing which takes away the point
of the pretty printing of the lock scenario.

Without displaying the subclass info, we get the following output:

  Possible unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(slock-AF_INET);
                                lock(slock-AF_INET);
                                lock(slock-AF_INET);
   lock(slock-AF_INET);

  *** DEADLOCK ***

The above looks more of a A->A locking bug than a A->B B->A.
By adding the subclass to the output, we can see what really happened:

 other info that might help us debug this:

  Possible unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(slock-AF_INET);
                                lock(slock-AF_INET/1);
                                lock(slock-AF_INET);
   lock(slock-AF_INET/1);

  *** DEADLOCK ***

This bug was discovered while tracking down a real bug caught by lockdep.

Link: http://lkml.kernel.org/r/20111025202049.GB25043@hostway.ca
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
13 years agovmwgfx: Snoop DMA transfers with non-covering sizes
Jakob Bornecrantz [Thu, 3 Nov 2011 20:03:08 +0000 (21:03 +0100)]
vmwgfx: Snoop DMA transfers with non-covering sizes

Enough to get cursors working under Wayland.

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Move the prefered mode first in the list
Jakob Bornecrantz [Thu, 3 Nov 2011 20:03:07 +0000 (21:03 +0100)]
vmwgfx: Move the prefered mode first in the list

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Unreference surface on cursor error path
Jakob Bornecrantz [Thu, 3 Nov 2011 20:03:06 +0000 (21:03 +0100)]
vmwgfx: Unreference surface on cursor error path

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Free prefered mode on error path
Jakob Bornecrantz [Thu, 3 Nov 2011 20:03:05 +0000 (21:03 +0100)]
vmwgfx: Free prefered mode on error path

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Use pointer return error codes
Jakob Bornecrantz [Thu, 3 Nov 2011 20:03:04 +0000 (21:03 +0100)]
vmwgfx: Use pointer return error codes

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Fix hw cursor position
Thomas Hellstrom [Wed, 2 Nov 2011 08:43:12 +0000 (09:43 +0100)]
vmwgfx: Fix hw cursor position

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Infrastructure for explicit placement
Thomas Hellstrom [Wed, 2 Nov 2011 08:43:11 +0000 (09:43 +0100)]
vmwgfx: Infrastructure for explicit placement

Make it possible to use explicit placement
(although not hooked up with a user-space interface yet)
and relax the single framebuffer limit to only apply to implicit placement.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Make the preferred autofit mode have a 60Hz vrefresh
Thomas Hellstrom [Wed, 2 Nov 2011 08:43:10 +0000 (09:43 +0100)]
vmwgfx: Make the preferred autofit mode have a 60Hz vrefresh

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Remove screen object active list
Thomas Hellstrom [Wed, 2 Nov 2011 08:43:09 +0000 (09:43 +0100)]
vmwgfx: Remove screen object active list

It isn't used for anything. Replace with an active bool.

Also make a couple of functions return void instead of int
since their return value wasn't checked anyway.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakbo Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agovmwgfx: Screen object cleanups
Thomas Hellstrom [Wed, 2 Nov 2011 08:43:08 +0000 (09:43 +0100)]
vmwgfx: Screen object cleanups

Remove unused member.
No need to pin / unpin fb.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agowriteback: fix uninitialized task_ratelimit
Wu Fengguang [Mon, 7 Nov 2011 11:19:28 +0000 (19:19 +0800)]
writeback: fix uninitialized task_ratelimit

In balance_dirty_pages() task_ratelimit may be not initialized
(initialization skiped by goto pause), and then used when calling
tracing hook.

Fix it by moving the task_ratelimit assignment before goto pause.

Reported-by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>