lkml.org 
[lkml]   [2021]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH RT 4/9] preempt: Move preempt_enable_no_resched() to the RT block
5.10.78-rt56-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

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 <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
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 af39859f02ee..7b5b2ed55531 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())
--
2.33.0
\
 
 \ /
  Last update: 2021-11-16 01:14    [W:0.042 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site