blob: a4b7753db316b67cdc74d29b146514157147061f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 24 Jun 2019 19:33:16 +0200
Subject: [PATCH 269/342] sched/core: Drop a preempt_disable_rt() statement
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=74d2e1a7300ec02a7bea54ed43fbabaa4e8e1193
[ Upstream commit 761126efdcbe3fa3e99c9079fa0ad6eca2f251f2 ]
The caller holds a lock which already disables preemption.
Drop the preempt_disable_rt() statement in get_nohz_timer_target().
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/sched/core.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index feaf4d5683af..3b0f62be3ece 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -558,14 +558,11 @@ void resched_cpu(int cpu)
*/
int get_nohz_timer_target(void)
{
- int i, cpu;
+ int i, cpu = smp_processor_id();
struct sched_domain *sd;
- preempt_disable_rt();
- cpu = smp_processor_id();
-
if (!idle_cpu(cpu) && housekeeping_cpu(cpu, HK_FLAG_TIMER))
- goto preempt_en_rt;
+ return cpu;
rcu_read_lock();
for_each_domain(cpu, sd) {
@@ -584,8 +581,6 @@ int get_nohz_timer_target(void)
cpu = housekeeping_any_cpu(HK_FLAG_TIMER);
unlock:
rcu_read_unlock();
-preempt_en_rt:
- preempt_enable_rt();
return cpu;
}
|
