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| author | Peter Zijlstra <peterz@infradead.org> | 2016-01-26 12:30:14 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-01-29 08:35:31 +0100 |
| commit | f47c02c0c8403963fbb8c3484e285727305d0f73 (patch) | |
| tree | 3672f498ef05670f261a8bfbfd66925eca852879 /certs | |
| parent | 6e801e016917989ab8a7ddfc4229a15a5621622a (diff) | |
| download | linux-f47c02c0c8403963fbb8c3484e285727305d0f73.tar.bz2 | |
perf: Robustify event->owner usage and SMP ordering
Use smp_store_release() to clear event->owner and
lockless_dereference() to observe it. Further use READ_ONCE() for all
lockless reads.
This changes perf_remove_from_owner() to leave event->owner cleared.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.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>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions