[RESEND PATCH v2 08/19] hrtimers: Introduce hrtimer_setup_sleeper_on_stack()

[Nam Cao]

The hrtimer_init*() API is replaced by hrtimer_setup*() variants to
initialize the timer including the callback function at once.

hrtimer_init_sleeper_on_stack() does not need user to setup the callback
function separately, so a new variant would not be strictly necessary.

Nonetheless, to keep the naming convention consistent, introduce
hrtimer_setup_sleeper_on_stack(). hrtimer_init_on_stack() will be removed
once all users are converted.

Signed-off-by: Nam Cao <namcao at linutronix.de>
---
 include/linux/hrtimer.h |  2 ++
 kernel/time/hrtimer.c   | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 2da513f8d66a..48872a2b4071 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -238,6 +238,8 @@ extern void hrtimer_setup_on_stack(struct hrtimer *timer,
 extern void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
 					  clockid_t clock_id,
 					  enum hrtimer_mode mode);
+extern void hrtimer_setup_sleeper_on_stack(struct hrtimer_sleeper *sl, clockid_t clock_id,
+					   enum hrtimer_mode mode);
 
 #ifdef CONFIG_DEBUG_OBJECTS_TIMERS
 extern void destroy_hrtimer_on_stack(struct hrtimer *timer);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index daee4e27f839..1d1f5c03673c 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -2065,6 +2065,20 @@ void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
 }
 EXPORT_SYMBOL_GPL(hrtimer_init_sleeper_on_stack);
 
+/**
+ * hrtimer_setup_sleeper_on_stack - initialize a sleeper in stack memory
+ * @sl:		sleeper to be initialized
+ * @clock_id:	the clock to be used
+ * @mode:	timer mode abs/rel
+ */
+void hrtimer_setup_sleeper_on_stack(struct hrtimer_sleeper *sl,
+				    clockid_t clock_id, enum hrtimer_mode mode)
+{
+	debug_init_on_stack(&sl->timer, clock_id, mode);
+	__hrtimer_init_sleeper(sl, clock_id, mode);
+}
+EXPORT_SYMBOL_GPL(hrtimer_setup_sleeper_on_stack);
+
 int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts)
 {
 	switch(restart->nanosleep.type) {
-- 
2.39.5