tree 0da824f6db67ce361976ef3b4d5a7212ea92619b
parent e202687927c132b1e1ff36b526b5e78ac33de840
author Lai Jiangshan <laijs@cn.fujitsu.com> 1247646450 +0800
committer Frederic Weisbecker <fweisbec@gmail.com> 1247784407 -0400

ring_buffer: Fix warning while ignoring cmpxchg return value

kernel/trace/ring_buffer.c: In function 'rb_tail_page_update':
kernel/trace/ring_buffer.c:849: warning: value computed is not used
kernel/trace/ring_buffer.c:850: warning: value computed is not used

Add "(void)"s to fix this warning, because we don't need here to handle
the fail case of cmpxchg, it's fine if an interrupt already did the
job.

Changed from V1:
  Add a comment(which is written by Steven) for it.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>