lkml.org 
[lkml]   [2016]   [Apr]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v0 1/3] perf/x86/intel/pt: Convert ACCESS_ONCE()s
Date
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>
---
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 05ef87d839..e88915ff98 100644
--- a/arch/x86/events/intel/pt.c
+++ b/arch/x86/events/intel/pt.c
@@ -933,7 +933,7 @@ 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;

/*
@@ -1035,7 +1035,7 @@ 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,
@@ -1058,7 +1058,7 @@ 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);

--
2.8.0.rc3
\
 
 \ /
  Last update: 2016-04-28 18:01    [W:0.160 / U:0.476 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site