[PATCH RT 07/16] sched/core: Drop a preempt_disable_rt() statement

[Steven Rostedt]

4.19.59-rt24-rc1 stable review patch.
If anyone has any objections, please let me know.

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

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

[ 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 <bige...@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rost...@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 91a9b2556fb0..1b2503b87473 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;
 }
 
-- 
2.20.1