From: Ingo Molnar <mingo@elte.hu>

RT tasks are unlikely, move this into rt_task() instead of open-coding it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>