From 887fdc51db7b73d22860a6846ee9a0a51566654b Mon Sep 17 00:00:00 2001 Message-Id: <887fdc51db7b73d22860a6846ee9a0a51566654b.1601675152.git.zanussi@kernel.org> In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org> References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org> From: Thomas Gleixner Date: Fri, 8 Jul 2011 16:35:35 +0200 Subject: [PATCH 176/333] fs/epoll: Do not disable preemption on RT Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz 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 --- fs/eventpoll.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 61a52bb26d12..87022491d5f6 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -571,12 +571,12 @@ static int ep_poll_wakeup_proc(void *priv, void *cookie, int call_nests) 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(); } #else -- 2.17.1