ring-buffer: add reader lock

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Impact: serialize reader accesses to individual CPU ring buffers

The code in the ring buffer expects only one reader at a time, but currently
it puts that requirement on the caller. This is not strong enough, and this
patch adds a "reader_lock" that serializes the access to the reader API
of the ring buffer.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Steven Rostedt 2008-11-11 18:47:44 +01:00 • committed by Ingo Molnar

parent f536aafc5a

commit f83c9d0fe4

1 changed files with 78 additions and 31 deletions

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111

kernel/trace/ring_buffer.c

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