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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2018-03-17 14:52:16 +0300 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-03-20 08:53:31 +0100 |
| commit | e5ea9b54a055619160bbfe527ebb7d7191823d66 (patch) | |
| tree | ac3d616f50cadace0863e9ddd0d1b86c6690b6bd /lib/test_overflow.c | |
| parent | perf/x86/intel: Disable userspace RDPMC usage for large PEBS (diff) | |
| download | linux-dev-e5ea9b54a055619160bbfe527ebb7d7191823d66.tar.xz linux-dev-e5ea9b54a055619160bbfe527ebb7d7191823d66.zip | |
perf/x86/intel: Don't accidentally clear high bits in bdw_limit_period()
We intended to clear the lowest 6 bits but because of a type bug we
clear the high 32 bits as well. Andi says that periods are rarely more
than U32_MAX so this bug probably doesn't have a huge runtime impact.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: 294fe0f52a44 ("perf/x86/intel: Add INST_RETIRED.ALL workarounds")
Link: http://lkml.kernel.org/r/20180317115216.GB4035@mwanda
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions