tree 37532424c8ea5a8dac649cb2baed04223722c09f
parent f536aafc5a2e6f0c8f1577a155e6f93db5e469f0
author Steven Rostedt <srostedt@redhat.com> 1226425664 +0100
committer Ingo Molnar <mingo@elte.hu> 1226425664 +0100

ring-buffer: add reader lock

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>