sched: Make scheduler_ipi inline

Now that the scheduler IPI is trivial and simple again there is no point to
have the little function out of line. This simplifies the effort of
constraining the instrumentation nicely.

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Alexandre Chartre <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

1 files changed, 9 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4418f5cb8324..d4ea4407cd6d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1715,7 +1715,15 @@ extern char *__get_task_comm(char *to, size_t len, struct task_struct *tsk);
 })
 
 #ifdef CONFIG_SMP
-void scheduler_ipi(void);
+static __always_inline void scheduler_ipi(void)
+{
+	/*
+	 * Fold TIF_NEED_RESCHED into the preempt_count; anybody setting
+	 * TIF_NEED_RESCHED remotely (for the first time) will also send
+	 * this IPI.
+	 */
+	preempt_fold_need_resched();
+}
 extern unsigned long wait_task_inactive(struct task_struct *, long match_state);
 #else
 static inline void scheduler_ipi(void) { }