| Subject: fs/epoll: Do not disable preemption on RT |
| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Fri, 08 Jul 2011 16:35:35 +0200 |
| |
| ep_call_nested() takes a sleeping lock so we can't disable preemption. |
| The light version is enough since ep_call_nested() doesn't mind beeing |
| invoked twice on the same CPU. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| --- |
| fs/eventpoll.c | 4 ++-- |
| 1 file changed, 2 insertions(+), 2 deletions(-) |
| |
| --- a/fs/eventpoll.c |
| +++ b/fs/eventpoll.c |
| @@ -510,12 +510,12 @@ static int ep_poll_wakeup_proc(void *pri |
| */ |
| static void ep_poll_safewake(wait_queue_head_t *wq) |
| { |
| - int this_cpu = get_cpu(); |
| + int this_cpu = get_cpu_light(); |
| |
| ep_call_nested(&poll_safewake_ncalls, EP_MAX_NESTS, |
| ep_poll_wakeup_proc, NULL, wq, (void *) (long) this_cpu); |
| |
| - put_cpu(); |
| + put_cpu_light(); |
| } |
| |
| static void ep_remove_wait_queue(struct eppoll_entry *pwq) |
