diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2019-05-17 13:52:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-22 08:15:16 +0200 |
| commit | 991ea848a5c944802263d97dfb5c57fd8a0ad0de (patch) | |
| tree | b250e5b4ebeb7af70db59d510082ee6de528b5ed /drivers/gpio | |
| parent | c133c9db233d12b83d405d285b9d95a60b747fa6 (diff) | |
perf/ring-buffer: Always use {READ,WRITE}_ONCE() for rb->user_page data
[ Upstream commit 4d839dd9e4356bbacf3eb0ab13a549b83b008c21 ]
We must use {READ,WRITE}_ONCE() on rb->user_page data such that
concurrent usage will see whole values. A few key sites were missing
this.
Suggested-by: Yabin Cui <yabinc@google.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: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: mark.rutland@arm.com
Cc: namhyung@kernel.org
Fixes: 7b732a750477 ("perf_counter: new output ABI - part 1")
Link: http://lkml.kernel.org/r/20190517115418.394192145@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpio')
0 files changed, 0 insertions, 0 deletions