linux.git/tools, branch v4.9-rc5

Merge branches 'pm-tools-fixes' and 'pm-sleep-fixes'

2016-11-11T22:24:58+00:00

* pm-tools-fixes:
  cpupower: Correct return type of cpu_power_is_cpu_online() in cpufreq-set

* pm-sleep-fixes:
  PM / sleep: don't suspend parent when async child suspend_{noirq, late} fails
  PM / sleep: fix device reference leak in test_suspend

cpupower: Correct return type of cpu_power_is_cpu_online() in cpufreq-set

2016-11-01T05:16:52+00:00

When converting to a shared library in ac5a181d065d ("cpupower: Add
cpuidle parts into library"), cpu_freq_cpu_exists() was converted to
cpupower_is_cpu_online(). cpu_req_cpu_exists() returned 0 on success and
-ENOSYS on failure whereas cpupower_is_cpu_online returns 1 on success.
Check for the correct return value in cpufreq-set.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1374212
Fixes: ac5a181d065d (cpupower: Add cpuidle parts into library)
Reported-by: Julian Seward 
Signed-off-by: Laura Abbott 
Acked-by: Thomas Renninger 
Cc: 4.7+  # 4.7+
Signed-off-by: Rafael J. Wysocki

ringtest: poll for new buffers once before updating event index

2016-10-30T22:21:43+00:00

Updating the event index has a memory barrier and causes more work
on the other side to actually signal the event.  It is unnecessary
if a new buffer has already appeared on the ring, so poll once before
doing the update.

The effect of this on the 0.9 ring implementation is pretty much
invisible, but on the new-style ring it provides a consistent 3%
performance improvement.

Signed-off-by: Paolo Bonzini 
Signed-off-by: Michael S. Tsirkin

ringtest: commonize implementation of poll_avail/poll_used

2016-10-30T22:21:43+00:00

Provide new primitives used_empty/avail_empty and
build poll_avail/poll_used on top of it.

Signed-off-by: Paolo Bonzini 
Signed-off-by: Michael S. Tsirkin

ringtest: use link-time optimization

2016-10-30T22:21:42+00:00

By using -flto and -fwhole-program, all functions from the ring implementation
can be treated as static and possibly inlined.  Force this to happen through
the GCC flatten attribute.

Signed-off-by: Paolo Bonzini 
Signed-off-by: Michael S. Tsirkin

objtool: Fix rare switch jump table pattern detection

2016-10-27T06:20:27+00:00

The following commit:

  3732710ff6f2 ("objtool: Improve rare switch jump table pattern detection")

... improved objtool's ability to detect GCC switch statement jump
tables for GCC 6.  However the check to allow short jumps with the
scanned range of instructions wasn't quite right.  The pattern detection
should allow jumps to the indirect jump instruction itself.

This fixes the following warning:

  drivers/infiniband/sw/rxe/rxe_comp.o: warning: objtool: rxe_completer()+0x315: sibling call from callable instruction with changed frame pointer

Reported-by: Arnd Bergmann 
Signed-off-by: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Fixes: 3732710ff6f2 ("objtool: Improve rare switch jump table pattern detection")
Link: http://lkml.kernel.org/r/20161026153408.2rifnw7bvoc5sex7@treble
Signed-off-by: Ingo Molnar

x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features

2016-10-19T15:37:13+00:00

AVX512_4VNNIW  - Vector instructions for deep learning enhanced word
variable precision.
AVX512_4FMAPS - Vector instructions for deep learning floating-point
single precision.

These new instructions are to be used in future Intel Xeon & Xeon Phi
processors. The bits 2&3 of CPUID[level:0x07, EDX] inform that new
instructions are supported by a processor.

The spec can be found in the Intel Software Developer Manual (SDM) or in
the Instruction Set Extensions Programming Reference (ISE).

Define new feature flags to enumerate the new instructions in /proc/cpuinfo
accordingly to CPUID bits and add the required xsave extensions which are
required for proper operation.

Signed-off-by: Piotr Luc 
Cc: Denys Vlasenko 
Cc: Peter Zijlstra 
Cc: Brian Gerst 
Cc: Dave Hansen 
Cc: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Josh Poimboeuf 
Cc: Linus Torvalds 
Link: http://lkml.kernel.org/r/20161018150111.29926-1-piotr.luc@intel.com
Signed-off-by: Thomas Gleixner

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-18T16:30:18+00:00

Pull perf fixes from Ingo Molnar:
 "Four tooling fixes, two kprobes KASAN related fixes and an x86 PMU
  driver fix/cleanup"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf jit: Fix build issue on Ubuntu
  perf jevents: Handle events including .c and .o
  perf/x86/intel: Remove an inconsistent NULL check
  kprobes: Unpoison stack in jprobe_return() for KASAN
  kprobes: Avoid false KASAN reports during stack copy
  perf header: Set nr_numa_nodes only when we parsed all the data
  perf top: Fix refreshing hierarchy entries on TUI

Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-18T15:35:07+00:00

Pull misc fixes from Ingo Molnar:
 "A CPU hotplug debuggability fix and three objtool false positive
  warnings fixes for new GCC6 code generation patterns"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu/hotplug: Use distinct name for cpu_hotplug.dep_map
  objtool: Skip all "unreachable instruction" warnings for gcov kernels
  objtool: Improve rare switch jump table pattern detection
  objtool: Support '-mtune=atom' stack frame setup instruction

Merge tag 'perf-urgent-for-mingo-20161017' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

2016-10-17T14:49:16+00:00

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

- Fix handling of NUMA nodes in perf.data files (Jiri Olsa)

- Fix scrolling when refreshing 'perf top --tui --hierarchy' entries (Namhyung Kim)

- Fix building of JIT support on Ubuntu 16.04 (Anton Blanchard)

- Fix handling of events including .c and .o, that were being treated as
  BPF scripts instead of vendor ones (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Ingo Molnar