38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
From 364aac82cf51da276aaf325fbcc1d837b41ebd6d Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Fri, 8 Jul 2011 16:35:35 +0200
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Subject: [PATCH 177/264] fs/epoll: Do not disable preemption on RT
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.37-rt19.tar.xz
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ep_call_nested() takes a sleeping lock so we can't disable preemption.
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The light version is enough since ep_call_nested() doesn't mind beeing
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invoked twice on the same CPU.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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fs/eventpoll.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/fs/eventpoll.c b/fs/eventpoll.c
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index 58f48ea0db23..a41120a34e6d 100644
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--- a/fs/eventpoll.c
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+++ b/fs/eventpoll.c
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@@ -571,12 +571,12 @@ static int ep_poll_wakeup_proc(void *priv, void *cookie, int call_nests)
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static void ep_poll_safewake(wait_queue_head_t *wq)
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{
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- int this_cpu = get_cpu();
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+ int this_cpu = get_cpu_light();
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ep_call_nested(&poll_safewake_ncalls, EP_MAX_NESTS,
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ep_poll_wakeup_proc, NULL, wq, (void *) (long) this_cpu);
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- put_cpu();
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+ put_cpu_light();
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}
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#else
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--
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2.20.1
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