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 <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.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: vince@deater.net
Link: http://lkml.kernel.org/r/1461857746-31346-2-git-send-email-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index c3a359c..54fa238 100644 (file)
--- 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);