oprofile: warn on freeing event buffer too early

A race shouldn't happen since all workqueues or handlers are canceled
or flushed before the event buffer is freed. A warning is triggered
now if the buffer is freed too early.

Also, this patch adds some comments about event buffer protection,
reworks some code and adds code to clear buffer_pos during alloc and
free of the event buffer.

Cc: David Rientjes <[email protected]>
Cc: Stephane Eranian <[email protected]>
Signed-off-by: Robert Richter <[email protected]>

0 files changed, 0 insertions, 0 deletions