tracing: add ring_buffer_event_discard() to ring buffer
authorTom Zanussi <tzanussi@gmail.com>
Sun, 22 Mar 2009 08:30:49 +0000 (03:30 -0500)
committerIngo Molnar <mingo@elte.hu>
Sun, 22 Mar 2009 17:38:25 +0000 (18:38 +0100)
commit2d622719f1572ef31e0616444a515eba3094d050
treef9bffcdca6289f141fb53a38dd9f32af8c71efad
parentcf027f645e6aee4f0ca6197a6b6a57f327fdb13f
tracing: add ring_buffer_event_discard() to ring buffer

This patch overloads RINGBUF_TYPE_PADDING to provide a way to discard
events from the ring buffer, for the event-filtering mechanism
introduced in a subsequent patch.

I did the initial version but thanks to Steven Rostedt for adding
the parts that actually made it work. ;-)

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/linux/ring_buffer.h
kernel/trace/ring_buffer.c