Some time ago PREEMPT_NEED_RESCHED was implemented,
so reschedule technics is a little more difficult now.
Signed-off-by: NKirill Tkhai <ktkhai@parallels.com>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20140922183642.11015.66039.stgit@localhostSigned-off-by: NIngo Molnar <mingo@kernel.org>