perf/core: Fix __perf_read_group_add() locking

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[ Upstream commit a9cd8194e1 ]

Event timestamps are serialized using ctx->lock, make sure to hold it
over reading all values.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Peter Zijlstra 2017-09-05 13:38:24 +02:00 • committed by Greg Kroah-Hartman

parent 9851961159

commit 4ee9572b10

1 changed files with 2 additions and 2 deletions

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kernel/events/core.c

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