]> git.baikalelectronics.ru Git - kernel.git/commit
perf/x86: Fix RAPL rdmsrl_safe() usage
authorStephane Eranian <eranian@google.com>
Wed, 23 Apr 2014 17:04:19 +0000 (19:04 +0200)
committerIngo Molnar <mingo@kernel.org>
Thu, 24 Apr 2014 06:12:41 +0000 (08:12 +0200)
commit4e8a0bccd033eb258ca4f7b576a27051e058f84e
tree9d92eb11e72942ff41a3e603548041c7f3033c89
parent7bc1bf8d755a3daedd02d49f886937c082616c40
perf/x86: Fix RAPL rdmsrl_safe() usage

This patch fixes a bug introduced by:

  074e4a346503 ("perf/x86/intel: Use rdmsrl_safe() when initializing RAPL PMU")

The rdmsrl_safe() function returns 0 on success.
The current code was failing to detect the RAPL PMU
on real hardware  (missing /sys/devices/power) because
the return value of rdmsrl_safe() was misinterpreted.

Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Venkatesh Srinivas <venkateshs@google.com>
Cc: peterz@infradead.org
Cc: zheng.z.yan@intel.com
Link: http://lkml.kernel.org/r/20140423170418.GA12767@quad
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/cpu/perf_event_intel_rapl.c