From 9a8af8cf25c2266997a715afdfce6804667f5cf3 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Wed, 22 Sep 2021 19:34:40 +0200 Subject: [PATCH 301/323] preempt: Move preempt_enable_no_resched() to the RT block Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.215-rt107.tar.xz preempt_enable_no_resched() should point to preempt_enable() on PREEMPT_RT so nobody is playing any preempt tricks and enables preemption without checking for the need-resched flag. This was misplaced in v3.14.0-rt1 und remained unnoticed until now. Point preempt_enable_no_resched() and preempt_enable() on RT. Cc: stable-rt@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Steven Rostedt (VMware) --- include/linux/preempt.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/preempt.h b/include/linux/preempt.h index af39859f02ee1..7b5b2ed55531a 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -208,12 +208,12 @@ do { \ preempt_count_dec(); \ } while (0) -#ifdef CONFIG_PREEMPT_RT +#ifndef CONFIG_PREEMPT_RT # define preempt_enable_no_resched() sched_preempt_enable_no_resched() -# define preempt_check_resched_rt() preempt_check_resched() +# define preempt_check_resched_rt() barrier(); #else # define preempt_enable_no_resched() preempt_enable() -# define preempt_check_resched_rt() barrier(); +# define preempt_check_resched_rt() preempt_check_resched() #endif #define preemptible() (preempt_count() == 0 && !irqs_disabled()) -- 2.44.0