sched: Create schedule_preempt_disabled()

Get rid of the ever repeating:

    preempt_enable_no_resched();
    schedule();
    preempt_disable();

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 6b3239590d5a..465fd119d3b2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4456,6 +4456,18 @@ asmlinkage void __sched schedule(void)
 }
 EXPORT_SYMBOL(schedule);
 
+/**
+ * schedule_preempt_disabled - called with preemption disabled
+ *
+ * Returns with preemption disabled. Note: preempt_count must be 1
+ */
+void __sched schedule_preempt_disabled(void)
+{
+	preempt_enable_no_resched();
+	schedule();
+	preempt_disable();
+}
+
 #ifdef CONFIG_MUTEX_SPIN_ON_OWNER
 
 static inline bool owner_running(struct mutex *lock, struct task_struct *owner)