Instead of defining __unused or redefining __maybe_unused.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-4eleto5pih31jw1q4dypm9pf@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

To have a more compact way to ask the compiler to perform scanf like
argument validation.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-yzqrhfjrn26lqqtwf55egg0h@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

To have a more compact way to ask the compiler to perform printf like
vargargs validation.

v2: Fixed up build on arm, squashing a patch by Kim Phillips, thanks!

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-dopkqmmuqs04cxzql0024nnu@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

To have a more compact way to specify that a function doesn't return,
instead of the open coded:

	__attribute__((noreturn))

And use it instead of the tools/perf/ specific variation, NORETURN.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-l0y144qzixcy5t4c6i7pdiqj@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

With 'perf script' it is common that we just want to add or remove a field.

Currently this requires figuring out the long list of default fields and
specifying them first, and then adding/removing the new field.

This patch adds a new + - syntax to merely add or remove fields,
that allows more succint and clearer command lines

For example to remove the comm field from PMU samples:

Previously

  $ perf script -F tid,cpu,time,event,sym,ip,dso,period | head -1
  swapper  0 [000] 504345.383126:          1 cycles:  ffffffff90060c66 native_write_msr ([kernel.kallsyms])

with the new syntax

  perf script -F -comm | head -1
  0 [000] 504345.383126:          1 cycles:  ffffffff90060c66 native_write_msr ([kernel.kallsyms])

The new syntax cannot be mixed with normal overriding.

v2: Fix example in description. Use tid vs pid. No functional changes.
v3: Don't skip initialization when user specified explicit type.
v4: Rebase. Remove empty line.

Committer testing:

  # perf record -a usleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 1.748 MB perf.data (14 samples) ]

Without a explicit field list specified via -F, defaults to:

  # perf script | head -2
      perf 6338 [000] 18467.058607: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
   swapper    0 [001] 18467.058617: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
  #

Which is equivalent to:

  # perf script -F comm,tid,cpu,time,period,event,ip,sym,dso | head -2
      perf 6338 [000] 18467.058607: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
   swapper    0 [001] 18467.058617: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
  #

So if we want to remove the comm, as in your original example, we would have to
figure out the default field list and remove ' comm' from it:

  # perf script -F tid,cpu,time,period,event,ip,sym,dso | head -2
   6338 [000] 18467.058607: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
      0 [001] 18467.058617: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
  #

With your patch this becomes simpler, one can remove fields by prefixing them
with '-':

  # perf script -F -comm | head -2
  6338 [000] 18467.058607: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
     0 [001] 18467.058617: 1 cycles: ffffffff89060c36 native_write_msr (/lib/modules/4.11.0-rc8+/build/vmlinux)
  #
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: NMilian Wolff <milian.wolff@kdab.com>
Link: http://lkml.kernel.org/r/20170602154810.15875-1-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: NTaeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1494241650-32210-1-git-send-email-treeze.taeung@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The annotate browser is divided into 2 frames. Left frame contains 3
columns (some platforms only have one column).

For example:

                   │26  int compute_flag()
                   │27  {
 22.80  1.20       │      sub    $0x8,%rsp
                   │25          int i;
                   │
                   │27          i = rand() % 2;
 22.78  1.20     1 │    → callq  rand@plt

While it's hard for user to understand what the data is.

This patch adds the titles "Percent", "IPC" and "Cycle" on columns.

Percent  IPC Cycle │
                   │25  __attribute__((noinline))
                   │26  int compute_flag()
                   │27  {
 22.80  1.20       │      sub    $0x8,%rsp
                   │25          int i;
                   │
                   │27          i = rand() % 2;
 22.78  1.20     1 │    → callq  rand@plt

The titles are displayed at row 0 of annotate browser if row 0 doesn't
have values of percent, ipc and cycle.
Signed-off-by: NYao Jin <yao.jin@linux.intel.com>
Acked-by: NMilian Wolff <milian.wolff@kdab.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yao Jin <yao.jin@linux.intel.com>
Link: http://lkml.kernel.org/r/1493909895-9668-3-git-send-email-yao.jin@linux.intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

In annotate_browser_write(),

        if (dl->offset != -1 && percent_max != 0.0) {
                if (percent_max != 0.0) {
			...
                }
                ...
        }

The second check of (percent_max != 0.0) is not necessary, remove it.
Signed-off-by: NYao Jin <yao.jin@linux.intel.com>
Acked-by: NMilian Wolff <milian.wolff@kdab.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yao Jin <yao.jin@linux.intel.com>
Link: http://lkml.kernel.org/r/1493909895-9668-2-git-send-email-yao.jin@linux.intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Merge tag 'perf-urgent-for-mingo-4.12-20170616' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

- Fix probing of precise_ip level for default cycles event, that
  got broken recently on x86_64 when its arch code started
  considering invalid requesting precise samples when not sampling
  (i.e. when attr.sample_period == 0).

  This also fixes another problem in s/390 where the precision
  probing with sample_period == 0 returned precise_ip > 0, that
  then, when setting up the real cycles event (not probing) would
  return EOPNOTSUPP for precise_ip > 0 (as determined previously
  by probing) and sample_period > 0.

  These problems resulted in attr_precise not being set to the
  highest precision available on x86.64 when no event was specified,
  i.e. the canonical:

	perf record ./workload

  would end up using attr.precise_ip = 0. As a workaround this would
  need to be done:

	perf record -e cycles:P ./workload

  And on s/390 it would plain not work, requiring using:

        perf record -e cycles ./workload

  as a workaround.  (Arnaldo Carvalho de Melo)

- Fix perf build with ARCH=x86_64, when ARCH should be transformed
  into ARCH=x86, just like with the main kernel Makefile and
  tools/objtool's, i.e. use SRCARCH. (Jiada Wang)

- Avoid accessing uninitialized data structures when unwinding with
  elfutils's libdw, making it more closely mimic libunwind's unwinder.
  (Milian Wolff)
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NIngo Molnar <mingo@kernel.org>

The PC returned by dwfl_frame_pc() may map into a not-yet-reported
module. We have to report it before we continue unwinding. But when we
query for the isactivation flag in dwfl_frame_pc, libdw will actually do
one more unwinding step internally which can then break and lead to
missed frames or broken stacks.

With libunwind we get e.g.:

~~~~~
  heaptrack_gui  2228 135073.400474:     613969 cycles:
	          108c8e [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          1093bc [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          109e7b QLocale::QLocale (/usr/lib/libQt5Core.so.5.8.0)
	          1470ff [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          147f67 QSystemLocale::query (/usr/lib/libQt5Core.so.5.8.0)
	          109fbf QLocalePrivate::updateSystemPrivate (/usr/lib/libQt5Core.so.5.8.0)
	          10aa27 QLocale::QLocale (/usr/lib/libQt5Core.so.5.8.0)
	          1e02c3 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          2113bb [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          211505 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          1b5df0 QFileInfo::exists (/usr/lib/libQt5Core.so.5.8.0)
	           92eb2 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	           93423 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	           93d2a QLibraryInfo::location (/usr/lib/libQt5Core.so.5.8.0)
	          2170af [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          297c53 QCoreApplicationPrivate::init (/usr/lib/libQt5Core.so.5.8.0)
	           f7cde QGuiApplicationPrivate::init (/usr/lib/libQt5Gui.so.5.8.0)
	          1589e8 QApplicationPrivate::init (/usr/lib/libQt5Widgets.so.5.8.0)
	           78622 main (/home/milian/projects/compiled/other/bin/heaptrack_gui)
	           20439 __libc_start_main (/usr/lib/libc-2.25.so)
	           78299 _start (/home/milian/projects/compiled/other/bin/heaptrack_gui)

  heaptrack_gui  2228 135073.401156:     569521 cycles:
	          131633 QString::endsWith (/usr/lib/libQt5Core.so.5.8.0)
	          1a0701 QDir::cleanPath (/usr/lib/libQt5Core.so.5.8.0)
	          21b82d [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          1b3727 QFileInfo::canonicalFilePath (/usr/lib/libQt5Core.so.5.8.0)
	          2780c7 QFactoryLoader::update (/usr/lib/libQt5Core.so.5.8.0)
	          279525 QFactoryLoader::QFactoryLoader (/usr/lib/libQt5Core.so.5.8.0)
	           e5bd0 QPlatformIntegrationFactory::create (/usr/lib/libQt5Gui.so.5.8.0)
	           f5a1c QGuiApplicationPrivate::createPlatformIntegration (/usr/lib/libQt5Gui.so.5.8.0)
	           f650c QGuiApplicationPrivate::createEventDispatcher (/usr/lib/libQt5Gui.so.5.8.0)
	          298524 QCoreApplicationPrivate::init (/usr/lib/libQt5Core.so.5.8.0)
	           f7cde QGuiApplicationPrivate::init (/usr/lib/libQt5Gui.so.5.8.0)
	          1589e8 QApplicationPrivate::init (/usr/lib/libQt5Widgets.so.5.8.0)
	           78622 main (/home/milian/projects/compiled/other/bin/heaptrack_gui)
	           20439 __libc_start_main (/usr/lib/libc-2.25.so)
	           78299 _start (/home/milian/projects/compiled/other/bin/heaptrack_gui)
~~~~~

Note the two frames 1589e8 and 78622 in the first sample. These are
missing when unwinding with libdw. The second sample's breakage is
more obvious:

~~~~~
  heaptrack_gui  2228 135073.400474:     613969 cycles:
	          108c8e [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          1093bc [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          109e7b QLocale::QLocale (/usr/lib/libQt5Core.so.5.8.0)
	          1470ff [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          147f67 QSystemLocale::query (/usr/lib/libQt5Core.so.5.8.0)
	          109fbf QLocalePrivate::updateSystemPrivate (/usr/lib/libQt5Core.so.5.8.0)
	          10aa27 QLocale::QLocale (/usr/lib/libQt5Core.so.5.8.0)
	          1e02c3 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          2113bb [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          211505 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          1b5df0 QFileInfo::exists (/usr/lib/libQt5Core.so.5.8.0)
	           92eb2 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	           93423 [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	           93d2a QLibraryInfo::location (/usr/lib/libQt5Core.so.5.8.0)
	          2170af [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          297c53 QCoreApplicationPrivate::init (/usr/lib/libQt5Core.so.5.8.0)
	           f7cde QGuiApplicationPrivate::init (/usr/lib/libQt5Gui.so.5.8.0)
	           20439 __libc_start_main (/usr/lib/libc-2.25.so)
	           78299 _start (/home/milian/projects/compiled/other/bin/heaptrack_gui)

heaptrack_gui  2228 135073.401156:     569521 cycles:
	          131633 QString::endsWith (/usr/lib/libQt5Core.so.5.8.0)
	          1a0701 QDir::cleanPath (/usr/lib/libQt5Core.so.5.8.0)
	          21b82d [unknown] (/usr/lib/libQt5Core.so.5.8.0)
	          1b3727 QFileInfo::canonicalFilePath (/usr/lib/libQt5Core.so.5.8.0)
	          2780c7 QFactoryLoader::update (/usr/lib/libQt5Core.so.5.8.0)
	          279525 QFactoryLoader::QFactoryLoader (/usr/lib/libQt5Core.so.5.8.0)
	           e5bd0 QPlatformIntegrationFactory::create (/usr/lib/libQt5Gui.so.5.8.0)
	          723dbf [unknown] ([unknown])
~~~~~

This patch fixes this issue and the libdw unwinder mimicks the libunwind
behavior more closely.
Signed-off-by: NMilian Wolff <milian.wolff@kdab.com>
Acked-by: NJan Kratochvil <jan.kratochvil@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20170602143753.16907-2-milian.wolff@kdab.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

With commit: 0a943cb1 (tools build: Add HOSTARCH Makefile variable)
when building for ARCH=x86_64, ARCH=x86_64 is passed to perf instead of
ARCH=x86, so the perf build process searchs header files from
tools/arch/x86_64/include, which doesn't exist.

The following build failure is seen:

  In file included from util/event.c:2:0:
    tools/include/uapi/linux/mman.h:4:27: fatal error: uapi/asm/mman.h: No such file or directory
    compilation terminated.

Fix this issue by using SRCARCH instead of ARCH in perf, just like the
main kernel Makefile and tools/objtool's.
Signed-off-by: NJiada Wang <jiada_wang@mentor.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Eugeniu Rosca <erosca@de.adit-jv.com>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Rui Teng <rui.teng@linux.vnet.ibm.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 0a943cb1 ("tools build: Add HOSTARCH Makefile variable")
Link: http://lkml.kernel.org/r/1491793357-14977-2-git-send-email-jiada_wang@mentor.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Since commit 18e7a45a ("perf/x86: Reject non sampling events with
precise_ip") returns -EINVAL for sys_perf_event_open() with an attribute
with (attr.precise_ip > 0 && attr.sample_period == 0), just like is done
in the routine used to probe the max precise level when no events were
passed to 'perf record' or 'perf top', i.e.:

	perf_evsel__new_cycles()
		perf_event_attr__set_max_precise_ip()

The x86 code, in x86_pmu_hw_config(), which is called all the way from
sys_perf_event_open() did, starting with the aforementioned commit:

                /* There's no sense in having PEBS for non sampling events: */
                if (!is_sampling_event(event))
                        return -EINVAL;

Which makes it fail for cycles:ppp, cycles:pp and cycles:p, always using
just the non precise cycles variant.

To make sure that this is the case, I tested it, before this patch,
with:

  # perf probe -L x86_pmu_hw_config
  <x86_pmu_hw_config@/home/acme/git/linux/arch/x86/events/core.c:0>
        0  int x86_pmu_hw_config(struct perf_event *event)
        1  {
        2         if (event->attr.precise_ip) {
<SNIP>
       17                 if (event->attr.precise_ip > precise)
       18                         return -EOPNOTSUPP;

                          /* There's no sense in having PEBS for non sampling events: */
       21                 if (!is_sampling_event(event))
       22                         return -EINVAL;
                  }
<SNIP>
  # perf probe x86_pmu_hw_config:22
  Added new events:
    probe:x86_pmu_hw_config (on x86_pmu_hw_config:22)
    probe:x86_pmu_hw_config_1 (on x86_pmu_hw_config:22)

  You can now use it in all perf tools, such as:

        perf record -e probe:x86_pmu_hw_config_1 -aR sleep 1

  # perf trace -e perf_event_open,probe:x86_pmu_hwconfig*/max-stack=16/ perf record usleep 1
     0.000 ( 0.015 ms): perf/4150 perf_event_open(attr_uptr: 0x7ffebc8ba110, cpu: -1, group_fd: -1      ) ...
     0.015 (         ): probe:x86_pmu_hw_config:(ffffffff9c0065e1))
                                       x86_pmu_hw_config ([kernel.kallsyms])
                                       hsw_hw_config ([kernel.kallsyms])
                                       x86_pmu_event_init ([kernel.kallsyms])
                                       perf_try_init_event ([kernel.kallsyms])
                                       perf_event_alloc ([kernel.kallsyms])
                                       SYSC_perf_event_open ([kernel.kallsyms])
                                       sys_perf_event_open ([kernel.kallsyms])
                                       do_syscall_64 ([kernel.kallsyms])
                                       return_from_SYSCALL_64 ([kernel.kallsyms])
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_event_attr__set_max_precise_ip (/home/acme/bin/perf)
                                       perf_evsel__new_cycles (/home/acme/bin/perf)
                                       perf_evlist__add_default (/home/acme/bin/perf)
                                       cmd_record (/home/acme/bin/perf)
                                       run_builtin (/home/acme/bin/perf)
                                       handle_internal_command (/home/acme/bin/perf)
     0.000 ( 0.021 ms): perf/4150  ... [continued]: perf_event_open()) = -1 EINVAL Invalid argument
     0.023 ( 0.002 ms): perf/4150 perf_event_open(attr_uptr: 0x7ffebc8ba110, cpu: -1, group_fd: -1      ) ...
     0.025 (         ): probe:x86_pmu_hw_config:(ffffffff9c0065e1))
                                       x86_pmu_hw_config ([kernel.kallsyms])
                                       hsw_hw_config ([kernel.kallsyms])
                                       x86_pmu_event_init ([kernel.kallsyms])
                                       perf_try_init_event ([kernel.kallsyms])
                                       perf_event_alloc ([kernel.kallsyms])
                                       SYSC_perf_event_open ([kernel.kallsyms])
                                       sys_perf_event_open ([kernel.kallsyms])
                                       do_syscall_64 ([kernel.kallsyms])
                                       return_from_SYSCALL_64 ([kernel.kallsyms])
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_event_attr__set_max_precise_ip (/home/acme/bin/perf)
                                       perf_evsel__new_cycles (/home/acme/bin/perf)
                                       perf_evlist__add_default (/home/acme/bin/perf)
                                       cmd_record (/home/acme/bin/perf)
                                       run_builtin (/home/acme/bin/perf)
                                       handle_internal_command (/home/acme/bin/perf)
     0.023 ( 0.004 ms): perf/4150  ... [continued]: perf_event_open()) = -1 EINVAL Invalid argument
     0.028 ( 0.002 ms): perf/4150 perf_event_open(attr_uptr: 0x7ffebc8ba110, cpu: -1, group_fd: -1      ) ...
     0.030 (         ): probe:x86_pmu_hw_config:(ffffffff9c0065e1))
                                       x86_pmu_hw_config ([kernel.kallsyms])
                                       hsw_hw_config ([kernel.kallsyms])
                                       x86_pmu_event_init ([kernel.kallsyms])
                                       perf_try_init_event ([kernel.kallsyms])
                                       perf_event_alloc ([kernel.kallsyms])
                                       SYSC_perf_event_open ([kernel.kallsyms])
                                       sys_perf_event_open ([kernel.kallsyms])
                                       do_syscall_64 ([kernel.kallsyms])
                                       return_from_SYSCALL_64 ([kernel.kallsyms])
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_event_attr__set_max_precise_ip (/home/acme/bin/perf)
                                       perf_evsel__new_cycles (/home/acme/bin/perf)
                                       perf_evlist__add_default (/home/acme/bin/perf)
                                       cmd_record (/home/acme/bin/perf)
                                       run_builtin (/home/acme/bin/perf)
                                       handle_internal_command (/home/acme/bin/perf)
     0.028 ( 0.004 ms): perf/4150  ... [continued]: perf_event_open()) = -1 EINVAL Invalid argument
    41.018 ( 0.012 ms): perf/4150 perf_event_open(attr_uptr: 0x7ffebc8b5dd0, pid: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
    41.065 ( 0.011 ms): perf/4150 perf_event_open(attr_uptr: 0x3c7db78, pid: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
    41.080 ( 0.006 ms): perf/4150 perf_event_open(attr_uptr: 0x3c7db78, pid: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
    41.103 ( 0.010 ms): perf/4150 perf_event_open(attr_uptr: 0x3c4e748, pid: 4151 (perf), group_fd: -1, flags: FD_CLOEXEC) = 4
    41.115 ( 0.006 ms): perf/4150 perf_event_open(attr_uptr: 0x3c4e748, pid: 4151 (perf), cpu: 1, group_fd: -1, flags: FD_CLOEXEC) = 5
    41.122 ( 0.004 ms): perf/4150 perf_event_open(attr_uptr: 0x3c4e748, pid: 4151 (perf), cpu: 2, group_fd: -1, flags: FD_CLOEXEC) = 6
    41.128 ( 0.008 ms): perf/4150 perf_event_open(attr_uptr: 0x3c4e748, pid: 4151 (perf), cpu: 3, group_fd: -1, flags: FD_CLOEXEC) = 8
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.017 MB perf.data (2 samples) ]
  #

I.e. that return -EINVAL in x86_pmu_hw_config() is hit three times.

So fix it by just setting attr.sample_period

Now, after this patch:

  # perf trace --max-stack=2 -e perf_event_open,probe:x86_pmu_hw_config* perf record usleep 1
  [ perf record: Woken up 1 times to write data ]
     0.000 ( 0.017 ms): perf/8469 perf_event_open(attr_uptr: 0x7ffe36c27d10, pid: -1, cpu: 3, group_fd: -1, flags: FD_CLOEXEC) = 4
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_event_open_cloexec_flag (/home/acme/bin/perf)
     0.050 ( 0.031 ms): perf/8469 perf_event_open(attr_uptr: 0x24ebb78, pid: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_evlist__config (/home/acme/bin/perf)
     0.092 ( 0.040 ms): perf/8469 perf_event_open(attr_uptr: 0x24ebb78, pid: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_evlist__config (/home/acme/bin/perf)
     0.143 ( 0.007 ms): perf/8469 perf_event_open(attr_uptr: 0x24bc748, cpu: -1, group_fd: -1           ) = 4
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_event_attr__set_max_precise_ip (/home/acme/bin/perf)
     0.161 ( 0.007 ms): perf/8469 perf_event_open(attr_uptr: 0x24bc748, pid: 8470 (perf), group_fd: -1, flags: FD_CLOEXEC) = 4
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_evsel__open (/home/acme/bin/perf)
     0.171 ( 0.005 ms): perf/8469 perf_event_open(attr_uptr: 0x24bc748, pid: 8470 (perf), cpu: 1, group_fd: -1, flags: FD_CLOEXEC) = 5
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_evsel__open (/home/acme/bin/perf)
     0.180 ( 0.007 ms): perf/8469 perf_event_open(attr_uptr: 0x24bc748, pid: 8470 (perf), cpu: 2, group_fd: -1, flags: FD_CLOEXEC) = 6
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_evsel__open (/home/acme/bin/perf)
     0.190 ( 0.005 ms): perf/8469 perf_event_open(attr_uptr: 0x24bc748, pid: 8470 (perf), cpu: 3, group_fd: -1, flags: FD_CLOEXEC) = 8
                                       syscall (/usr/lib64/libc-2.24.so)
                                       perf_evsel__open (/home/acme/bin/perf)
  [ perf record: Captured and wrote 0.017 MB perf.data (7 samples) ]
  #

The probe one called from perf_event_attr__set_max_precise_ip() works
the first time, with attr.precise_ip = 3, wit hthe next ones being the
per cpu ones for the cycles:ppp event.

And here is the text from a report and alternative proposed patch by
Thomas-Mich Richter:

 ---

On s390 the counter and sampling facility do not support a precise IP
skid level and sometimes returns EOPNOTSUPP when structure member
precise_ip in struct perf_event_attr is not set to zero.

On s390 commnd 'perf record -- true' fails with error EOPNOTSUPP.  This
happens only when no events are specified on command line.

The functions called are
...
  --> perf_evlist__add_default
      --> perf_evsel__new_cycles
          --> perf_event_attr__set_max_precise_ip

The last function determines the value of structure member precise_ip by
invoking the perf_event_open() system call and checking the return code.
The first successful open is the value for precise_ip.

However the value is determined without setting member sample_period and
indicates no sampling.

On s390 the counter facility and sampling facility are different.  The
above procedure determines a precise_ip value of 3 using the counter
facility. Later it uses the sampling facility with a value of 3 and
fails with EOPNOTSUPP.

 ---

v2: Older compilers (e.g. gcc 4.4.7) don't support referencing members
    of unnamed union members in the container struct initialization, so
    move from:

	struct perf_event_attr attr = {
		...
		.sample_period = 1,
	};

to right after it as:

	struct perf_event_attr attr = {
		...
	};

	attr.sample_period = 1;

v3: We need to reset .sample_period to 0 to let the users of
perf_evsel__new_cycles() to properly setup attr.sample_period or
attr.sample_freq. Reported by Ingo Molnar.
Reported-and-Acked-by: NThomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Acked-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Acked-by: NJiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 18e7a45a ("perf/x86: Reject non sampling events with precise_ip")
Link: http://lkml.kernel.org/n/tip-yv6nnkl7tzqocrm0hl3x7vf1@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Pull Xtensa fixes from Max Filippov:

 - don't use linux IRQ #0 in legacy irq domains: fixes timer interrupt
   assignment when it's hardware IRQ # is 0 and the kernel is built w/o
   device tree support

 - reduce reservation size for double exception vector literals from 48
   to 20 bytes: fixes build on cores with small user exception vector

 - cleanups: use kmalloc_array instead of kmalloc in simdisk_init and
   seq_puts instead of seq_printf in c_show.

* tag 'xtensa-20170612' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: don't use linux IRQ #0
  xtensa: reduce double exception literal reservation
  xtensa: ISS: Use kmalloc_array() in simdisk_init()
  xtensa: Use seq_puts() in c_show()

Pull s390 fixes from Martin Schwidefsky:

 - A fix for KVM to avoid kernel oopses in case of host protection
   faults due to runtime instrumentation

 - A fix for the AP bus to avoid dead devices after unbind / bind

 - A fix for a compile warning merged from the vfio_ccw tree

 - Updated default configurations

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: update defconfig
  s390/zcrypt: Fix blocking queue device after unbind/bind.
  s390/vfio_ccw: make some symbols static
  s390/kvm: do not rely on the ILC on kvm host protection fauls

Pull key subsystem fixes from James Morris:
 "Here are a bunch of fixes for Linux keyrings, including:

   - Fix up the refcount handling now that key structs use the
     refcount_t type and the refcount_t ops don't allow a 0->1
     transition.

   - Fix a potential NULL deref after error in x509_cert_parse().

   - Don't put data for the crypto algorithms to use on the stack.

   - Fix the handling of a null payload being passed to add_key().

   - Fix incorrect cleanup an uninitialised key_preparsed_payload in
     key_update().

   - Explicit sanitisation of potentially secure data before freeing.

   - Fixes for the Diffie-Helman code"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (23 commits)
  KEYS: fix refcount_inc() on zero
  KEYS: Convert KEYCTL_DH_COMPUTE to use the crypto KPP API
  crypto : asymmetric_keys : verify_pefile:zero memory content before freeing
  KEYS: DH: add __user annotations to keyctl_kdf_params
  KEYS: DH: ensure the KDF counter is properly aligned
  KEYS: DH: don't feed uninitialized "otherinfo" into KDF
  KEYS: DH: forbid using digest_null as the KDF hash
  KEYS: sanitize key structs before freeing
  KEYS: trusted: sanitize all key material
  KEYS: encrypted: sanitize all key material
  KEYS: user_defined: sanitize key payloads
  KEYS: sanitize add_key() and keyctl() key payloads
  KEYS: fix freeing uninitialized memory in key_update()
  KEYS: fix dereferencing NULL payload with nonzero length
  KEYS: encrypted: use constant-time HMAC comparison
  KEYS: encrypted: fix race causing incorrect HMAC calculations
  KEYS: encrypted: fix buffer overread in valid_master_desc()
  KEYS: encrypted: avoid encrypting/decrypting stack buffers
  KEYS: put keyring if install_session_keyring_to_cred() fails
  KEYS: Delete an error message for a failed memory allocation in get_derived_key()
  ...

Commit abb2ea7d ("compiler, clang: suppress warning for unused
static inline functions") just caused more warnings due to re-defining
the 'inline' macro.

So undef it before re-defining it, and also add the 'notrace' attribute
like the gcc version that this is overriding does.

Maybe this makes clang happier.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Pull randomness fixes from Ted Ts'o:
 "Improve performance by using a lockless update mechanism suggested by
  Linus, and make sure we refresh per-CPU entropy returned get_random_*
  as soon as the CRNG is initialized"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: invalidate batched entropy after crng init
  random: use lockless method of accessing and updating f->reg_idx

Pull ext4 fixes from Ted Ts'o:
 "Fix various bug fixes in ext4 caused by races and memory allocation
  failures"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix fdatasync(2) after extent manipulation operations
  ext4: fix data corruption for mmap writes
  ext4: fix data corruption with EXT4_GET_BLOCKS_ZERO
  ext4: fix quota charging for shared xattr blocks
  ext4: remove redundant check for encrypted file on dio write path
  ext4: remove unused d_name argument from ext4_search_dir() et al.
  ext4: fix off-by-one error when writing back pages before dio read
  ext4: fix off-by-one on max nr_pages in ext4_find_unwritten_pgoff()
  ext4: keep existing extra fields when inode expands
  ext4: handle the rest of ext4_mb_load_buddy() ENOMEM errors
  ext4: fix off-by-in in loop termination in ext4_find_unwritten_pgoff()
  ext4: fix SEEK_HOLE
  jbd2: preserve original nofs flag during journal restart
  ext4: clear lockdep subtype for quota files on quota off

Pull GPIO fixes from Linus Walleij:
 "A few overdue GPIO patches for the v4.12 kernel.

   - Fix debounce logic on the Aspeed platform.

   - Fix the "virtual gpio" things on the Intel Crystal Cove.

   - Fix the blink counter selection on the MVEBU platform"

* tag 'gpio-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: mvebu: fix gpio bank registration when pwm is used
  gpio: mvebu: fix blink counter register selection
  MAINTAINERS: remove self from GPIO maintainers
  gpio: crystalcove: Do not write regular gpio registers for virtual GPIOs
  gpio: aspeed: Don't attempt to debounce if disabled

Pull char/misc driver fixes from Greg KH:
 "Here are some small driver fixes for 4.12-rc5. Nothing major here,
  just some small bugfixes found by people testing, and a MAINTAINERS
  file update for the genwqe driver.

  All have been in linux-next with no reported issues"

[ The cxl driver fix came in through the powerpc tree earlier ]

* tag 'char-misc-4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  cxl: Avoid double free_irq() for psl,slice interrupts
  mei: make sysfs modalias format similar as uevent modalias
  drivers: char: mem: Fix wraparound check to allow mappings up to the end
  MAINTAINERS: Change maintainer of genwqe driver
  goldfish_pipe: use GFP_ATOMIC under spin lock
  firmware: vpd: do not leak kobjects
  firmware: vpd: avoid potential use-after-free when destroying section
  firmware: vpd: do not leave freed section attributes to the list

Pull staging/IIO fixes from Greg KH:
 "These are mostly all IIO driver fixes, resolving a number of tiny
  issues. There's also a ccree and lustre fix in here as well, both fix
  problems found in those codebases.

  All have been in linux-next with no reported issues"

* tag 'staging-4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: ccree: fix buffer copy
  staging/lustre/lov: remove set_fs() call from lov_getstripe()
  staging: ccree: add CRYPTO dependency
  iio: adc: sun4i-gpadc-iio: fix parent device being used in devm function
  iio: light: ltr501 Fix interchanged als/ps register field
  iio: adc: bcm_iproc_adc: swap primary and secondary isr handler's
  iio: trigger: fix NULL pointer dereference in iio_trigger_write_current()
  iio: adc: max9611: Fix attribute measure unit
  iio: adc: ti_am335x_adc: allocating too much in probe
  iio: adc: sun4i-gpadc-iio: Fix module autoload when OF devices are registered
  iio: adc: sun4i-gpadc-iio: Fix module autoload when PLATFORM devices are registered
  iio: proximity: as3935: fix iio_trigger_poll issue
  iio: proximity: as3935: fix AS3935_INT mask
  iio: adc: Max9611: checking for ERR_PTR instead of NULL in probe
  iio: proximity: as3935: recalibrate RCO after resume

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 4.12-rc5

  They are for some reported issues in the chipidea and gadget drivers.
  Nothing major. All have been in linux-next for a while with no
  reported issues"

* tag 'usb-4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: gadget: udc: renesas_usb3: Fix PN_INT_ENA disabling timing
  usb: gadget: udc: renesas_usb3: lock for PN_ registers access
  usb: gadget: udc: renesas_usb3: fix deadlock by spinlock
  usb: gadget: udc: renesas_usb3: fix pm_runtime functions calling
  usb: gadget: f_mass_storage: Serialize wake and sleep execution
  usb: dwc2: add support for the DWC2 controller on Meson8 SoCs
  phy: qualcomm: phy-qcom-qmp: fix application of sizeof to pointer
  usb: musb: dsps: keep VBUS on for host-only mode
  usb: chipidea: core: check before accessing ci_role in ci_role_show
  usb: chipidea: debug: check before accessing ci_role
  phy: qcom-qmp: fix return value check in qcom_qmp_phy_create()
  usb: chipidea: udc: fix NULL pointer dereference if udc_start failed
  usb: chipidea: imx: Do not access CLKONOFF on i.MX51

Pull SCSI fixes from James Bottomley:
 "This is a set of user visible fixes (excepting one format string
  change).

  Four of the qla2xxx fixes only affect the firmware dump path, but it's
  still important to the enterprise. The rest are various NULL pointer
  crash conditions or outright driver hangs"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: cxgb4i: libcxgbi: in error case RST tcp conn
  scsi: scsi_debug: Avoid PI being disabled when TPGS is enabled
  scsi: qla2xxx: Fix extraneous ref on sp's after adapter break
  scsi: lpfc: prevent potential null pointer dereference
  scsi: lpfc: Avoid NULL pointer dereference in lpfc_els_abort()
  scsi: lpfc: nvmet_fc: fix format string
  scsi: qla2xxx: Fix crash due to NULL pointer dereference of ctx
  scsi: qla2xxx: Fix mailbox pointer error in fwdump capture
  scsi: qla2xxx: Set bit 15 for DIAG_ECHO_TEST MBC
  scsi: qla2xxx: Modify T262 FW dump template to specify same start/end to debug customer issues
  scsi: qla2xxx: Fix crash due to mismatch mumber of Q-pair creation for Multi queue
  scsi: qla2xxx: Fix NULL pointer access due to redundant fc_host_port_name call
  scsi: qla2xxx: Fix recursive loop during target mode configuration for ISP25XX leaving system unresponsive
  scsi: bnx2fc: fix race condition in bnx2fc_get_host_stats()
  scsi: qla2xxx: don't disable a not previously enabled PCI device

Pull libnvdimm fix from Dan Williams:
 "We expanded the device-dax fs type in 4.12 to be a generic provider of
  a struct dax_device with an embedded inode. However, Sasha found some
  basic negative testing was not run to verify that this fs cleanly
  handles being mounted directly.

  Note that the fresh rebase was done to remove an unnecessary Cc:
  <stable> tag, but this commit otherwise had a build success
  notification from the 0day robot."

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: fix 'dax' device filesystem inode destruction crash

Merge tag 'hexagon-for-linus-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hexagon fix from Guenter Roeck:
 "This fixes a build error seen when building hexagon images.

  Richard sent me an Ack, but didn't reply when asked if he wants me to
  send the patch to you directly, so I figured I'd just do it"

* tag 'hexagon-for-linus-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hexagon: Use raw_copy_to_user

Pull KVM fixes from Paolo Bonzini:
 "Bug fixes (ARM, s390, x86)"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: async_pf: avoid async pf injection when in guest mode
  KVM: cpuid: Fix read/write out-of-bounds vulnerability in cpuid emulation
  arm: KVM: Allow unaligned accesses at HYP
  arm64: KVM: Allow unaligned accesses at EL2
  arm64: KVM: Preserve RES1 bits in SCTLR_EL2
  KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages
  KVM: nVMX: Fix exception injection
  kvm: async_pf: fix rcu_irq_enter() with irqs enabled
  KVM: arm/arm64: vgic-v3: Fix nr_pre_bits bitfield extraction
  KVM: s390: fix ais handling vs cpu model
  KVM: arm/arm64: Fix isues with GICv2 on GICv3 migration

 INFO: task gnome-terminal-:1734 blocked for more than 120 seconds.
       Not tainted 4.12.0-rc4+ #8
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 gnome-terminal- D    0  1734   1015 0x00000000
 Call Trace:
  __schedule+0x3cd/0xb30
  schedule+0x40/0x90
  kvm_async_pf_task_wait+0x1cc/0x270
  ? __vfs_read+0x37/0x150
  ? prepare_to_swait+0x22/0x70
  do_async_page_fault+0x77/0xb0
  ? do_async_page_fault+0x77/0xb0
  async_page_fault+0x28/0x30

This is triggered by running both win7 and win2016 on L1 KVM simultaneously,
and then gives stress to memory on L1, I can observed this hang on L1 when
at least ~70% swap area is occupied on L0.

This is due to async pf was injected to L2 which should be injected to L1,
L2 guest starts receiving pagefault w/ bogus %cr2(apf token from the host
actually), and L1 guest starts accumulating tasks stuck in D state in
kvm_async_pf_task_wait() since missing PAGE_READY async_pfs.

This patch fixes the hang by doing async pf when executing L1 guest.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: NWanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Commit ac4691fa ("hexagon: switch to RAW_COPY_USER") replaced
__copy_to_user_hexagon() with raw_copy_to_user(), but did not catch
all callers, resulting in the following build error.

arch/hexagon/mm/uaccess.c: In function '__clear_user_hexagon':
arch/hexagon/mm/uaccess.c:40:3: error:
	implicit declaration of function '__copy_to_user_hexagon'

Fixes: ac4691fa ("hexagon: switch to RAW_COPY_USER")
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NRichard Kuo <rkuo@codeaurora.org>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Pull UFS fixes from Al Viro:
 "This is just the obvious backport fodder; I'm pretty sure that there
  will be more - definitely so wrt performance and quite possibly
  correctness as well"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ufs: we need to sync inode before freeing it
  excessive checks in ufs_write_failed() and ufs_evict_inode()
  ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
  ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()
  ufs: set correct ->s_maxsize
  ufs: restore maintaining ->i_blocks
  fix ufs_isblockset()
  ufs: restore proper tail allocation

Pull btrfs fixes from Chris Mason:
 "Some fixes that Dave Sterba collected.

  We've been hitting an early enospc problem on production machines that
  Omar tracked down to an old int->u64 mistake. I waited a bit on this
  pull to make sure it was really the problem from production, but it's
  on ~2100 hosts now and I think we're good.

  Omar also noticed a commit in the queue would make new early ENOSPC
  problems. I pulled that out for now, which is why the top three
  commits are younger than the rest.

  Otherwise these are all fixes, some explaining very old bugs that
  we've been poking at for a while"

* 'for-linus-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix delalloc accounting leak caused by u32 overflow
  Btrfs: clear EXTENT_DEFRAG bits in finish_ordered_io
  btrfs: tree-log.c: Wrong printk information about namelen
  btrfs: fix race with relocation recovery and fs_root setup
  btrfs: fix memory leak in update_space_info failure path
  btrfs: use correct types for page indices in btrfs_page_exists_in_range
  btrfs: fix incorrect error return ret being passed to mapping_set_error
  btrfs: Make flush bios explicitely sync
  btrfs: fiemap: Cache and merge fiemap extent before submit it to user

Pull x86 fixes from Ingo Molnar:
 "Misc fixes: a Geode fix plus a microcode loader fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/microcode/intel: Clear patch pointer before jettisoning the initrd
  x86/cpu/cyrix: Add alternative Device ID of Geode GX1 SoC

Pull CPU hotplug fix from Ingo Molnar:
 "An error handling corner case fix"

* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu/hotplug: Drop the device lock on error

Pull RCU fixes from Ingo Molnar:
 "Fix an SRCU bug affecting KVM IRQ injection"

* 'rcu-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  srcu: Allow use of Classic SRCU from both process and interrupt context
  srcu: Allow use of Tiny/Tree SRCU from both process and interrupt context

Pull perf fixes from Ingo Molnar:
 "This is mostly tooling fixes, plus an instruction pointer filtering
  fix.

  It's more fixes than usual - Arnaldo got back from a longer vacation
  and there was a backlog"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
  perf symbols: Kill dso__build_id_is_kmod()
  perf symbols: Keep DSO->symtab_type after decompress
  perf tests: Decompress kernel module before objdump
  perf tools: Consolidate error path in __open_dso()
  perf tools: Decompress kernel module when reading DSO data
  perf annotate: Use dso__decompress_kmodule_path()
  perf tools: Introduce dso__decompress_kmodule_{fd,path}
  perf tools: Fix a memory leak in __open_dso()
  perf annotate: Fix symbolic link of build-id cache
  perf/core: Drop kernel samples even though :u is specified
  perf script python: Remove dups in documentation examples
  perf script python: Updated trace_unhandled() signature
  perf script python: Fix wrong code snippets in documentation
  perf script: Fix documentation errors
  perf script: Fix outdated comment for perf-trace-python
  perf probe: Fix examples section of documentation
  perf report: Ensure the perf DSO mapping matches what libdw sees
  perf report: Include partial stacks unwound with libdw
  perf annotate: Add missing powerpc triplet
  perf test: Disable breakpoint signal tests for powerpc
  ...

Pull EFI fix from Ingo Molnar:
 "A boot crash fix for certain systems where the kernel would trust a
  piece of firmware data it should not have"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: Fix boot panic because of invalid BGRT image address

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Pull IOMMU fixes from Joerg Roedel:

 - another compile-fix for my header cleanup

 - a couple of fixes for the recently merged IOMMU probe deferal code

 - fixes for ACPI/IORT code necessary with IOMMU probe deferal

* tag 'iommu-fixes-v4.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  arm: dma-mapping: Reset the device's dma_ops
  ACPI/IORT: Move the check to get iommu_ops from translated fwspec
  ARM: dma-mapping: Don't tear down third-party mappings
  ACPI/IORT: Ignore all errors except EPROBE_DEFER
  iommu/of: Ignore all errors except EPROBE_DEFER
  iommu/of: Fix check for returning EPROBE_DEFER
  iommu/dma: Fix function declaration

Pull input fixes from Dmitry Torokhov:

 - mark "guest" RMI device as pass-through port to avoid "phantom" ALPS
   toouchpad on newer Lenovo Carbons

 - add two more laptops to the Elantech's lists of devices using CRC
   mode

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: synaptics-rmi4 - register F03 port as pass-through serio
  Input: elantech - add Fujitsu Lifebook E546/E557 to force crc_enabled