Commit-ID: 1b6de5917172967acd8db4d222df4225d23a8a60 Gitweb: http://git.kernel.org/tip/1b6de5917172967acd8db4d222df4225d23a8a60 Author: Alexander Shishkin <[email protected]> AuthorDate: Thu, 28 Apr 2016 18:35:44 +0300 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 5 May 2016 10:16:29 +0200
perf/x86/intel/pt: Convert ACCESS_ONCE()s This patch converts remaining ACCESS_ONCE() instances into READ_ONCE() and WRITE_ONCE() as appropriate. Signed-off-by: Alexander Shishkin <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Mathieu Poirier <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vince Weaver <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/1461857746-31346-2-git-send-email-alexander.shish...@linux.intel.com Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/events/intel/pt.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c index c3a359c..54fa238 100644 --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -1135,7 +1135,7 @@ void intel_pt_interrupt(void) * after PT has been disabled by pt_event_stop(). Make sure we don't * do anything (particularly, re-enable) for this event here. */ - if (!ACCESS_ONCE(pt->handle_nmi)) + if (!READ_ONCE(pt->handle_nmi)) return; /* @@ -1237,7 +1237,7 @@ static void pt_event_start(struct perf_event *event, int mode) goto fail_end_stop; } - ACCESS_ONCE(pt->handle_nmi) = 1; + WRITE_ONCE(pt->handle_nmi, 1); hwc->state = 0; pt_config_buffer(buf->cur->table, buf->cur_idx, @@ -1260,7 +1260,7 @@ static void pt_event_stop(struct perf_event *event, int mode) * Protect against the PMI racing with disabling wrmsr, * see comment in intel_pt_interrupt(). */ - ACCESS_ONCE(pt->handle_nmi) = 0; + WRITE_ONCE(pt->handle_nmi, 0); pt_config_stop(event);
