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| author | John Dias <joaodias@google.com> | 2016-10-10 17:11:18 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:59:44 +0200 |
| commit | a0e40f4a2698fef4497265757f6c83e382365b60 (patch) | |
| tree | 594501e3fcbd5f010f877ca2e821e08862b116fc /drivers | |
| parent | 0fa18f53a9d4b875c1033507b08f8677caaad7ef (diff) | |
BACKPORT: perf: Fix event->ctx locking
There have been a few reported issues wrt. the lack of locking around
changing event->ctx. This patch tries to address those.
It avoids the whole rwsem thing; and while it appears to work, please
give it some thought in review.
What I did fail at is sensible runtime checks on the use of
event->ctx, the RCU use makes it very hard.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150123125834.209535886@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit f63a8daa5812afef4f06c962351687e1ff9ccb2b)
Bug: 30955111
Bug: 31095224
Change-Id: I5bab713034e960fad467637e98e914440de5666d
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions