[tip: sched/core] sched: Make scheduler_ipi inline

tip-bot2 for Thomas Gleixner
2020-05-12T15:13:36Z

The following commit has been merged into the sched/core branch of tip:

Commit-ID: 2a0a24ebb499c9d499eea948d3fc108f936e36d4
Gitweb: https://git.kernel.org/tip/2a0a24ebb499c9d499eea948d3fc108f936e36d4
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Fri, 27 Mar 2020 12:42:00 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Tue, 12 May 2020 17:10:49 +02:00

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 <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134058.453581595@linutronix.de
---
include/linux/sched.h | 10 +++++++++-
kernel/sched/core.c | 10 ----------
2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4418f5c..d4ea440 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) { }
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index cd2070d..74fb89b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2312,16 +2312,6 @@ static void wake_csd_func(void *info)
sched_ttwu_pending();
}

-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();
-}
-
static void ttwu_queue_remote(struct task_struct *p, int cpu, int wake_flags)
{
struct rq *rq = cpu_rq(cpu);