Commit-ID: f971e511cb7d6f1b3730248cf2967d3ccdd8874c Gitweb: https://git.kernel.org/tip/f971e511cb7d6f1b3730248cf2967d3ccdd8874c Author: Mark Rutland <mark.rutland@xxxxxxx> AuthorDate: Mon, 27 Nov 2017 10:38:21 +0000 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Tue, 12 Dec 2017 13:22:09 +0100 tools/perf: Convert ACCESS_ONCE() to READ_ONCE() Recently there was a treewide conversion of ACCESS_ONCE() to {READ,WRITE}_ONCE(), but a new use was introduced concurrently by commit: 1695849735752d2a ("perf mmap: Move perf_mmap and methods to separate mmap.[ch] files") Let's convert this over to READ_ONCE() so that we can remove the ACCESS_ONCE() definitions in subsequent patches. Tested-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx> Reviewed-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: Joe Perches <joe@xxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: apw@xxxxxxxxxxxxx Link: http://lkml.kernel.org/r/20171127103824.36526-2-mark.rutland@xxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- tools/perf/util/mmap.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index efd78b8..3a5cb5a 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -70,7 +70,7 @@ void perf_mmap__read_catchup(struct perf_mmap *md); static inline u64 perf_mmap__read_head(struct perf_mmap *mm) { struct perf_event_mmap_page *pc = mm->base; - u64 head = ACCESS_ONCE(pc->data_head); + u64 head = READ_ONCE(pc->data_head); rmb(); return head; } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html