[PATCH 1/9] timer: Move trigger_dyntick_cpu() to enqueue_timer()

Frederic Weisbecker
2020-07-07T01:33:11Z

Consolidate the code by calling trigger_dyntick_cpu() from
enqueue_timer() instead of calling it from all its callers.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Juri Lelli <juri.lelli@redhat.com>
---
kernel/time/timer.c | 46 +++++++++++++++++++--------------------------
1 file changed, 19 insertions(+), 27 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 9a838d38dbe6..4c977df3610b 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -529,29 +529,6 @@ static int calc_wheel_index(unsigned long expires, unsigned long clk)
return idx;
}

-/*
- * Enqueue the timer into the hash bucket, mark it pending in
- * the bitmap and store the index in the timer flags.
- */
-static void enqueue_timer(struct timer_base *base, struct timer_list *timer,
- unsigned int idx)
-{
- hlist_add_head(&timer->entry, base->vectors + idx);
- __set_bit(idx, base->pending_map);
- timer_set_idx(timer, idx);
-
- trace_timer_start(timer, timer->expires, timer->flags);
-}
-
-static void
-__internal_add_timer(struct timer_base *base, struct timer_list *timer)
-{
- unsigned int idx;
-
- idx = calc_wheel_index(timer->expires, base->clk);
- enqueue_timer(base, timer, idx);
-}
-
static void
trigger_dyntick_cpu(struct timer_base *base, struct timer_list *timer)
{
@@ -596,13 +573,29 @@ trigger_dyntick_cpu(struct timer_base *base, struct timer_list *timer)
wake_up_nohz_cpu(base->cpu);
}

-static void
-internal_add_timer(struct timer_base *base, struct timer_list *timer)
+/*
+ * Enqueue the timer into the hash bucket, mark it pending in
+ * the bitmap and store the index in the timer flags.
+ */
+static void enqueue_timer(struct timer_base *base, struct timer_list *timer,
+ unsigned int idx)
{
- __internal_add_timer(base, timer);
+ hlist_add_head(&timer->entry, base->vectors + idx);
+ __set_bit(idx, base->pending_map);
+ timer_set_idx(timer, idx);
+
+ trace_timer_start(timer, timer->expires, timer->flags);
trigger_dyntick_cpu(base, timer);
}

+static void internal_add_timer(struct timer_base *base, struct timer_list *timer)
+{
+ unsigned int idx;
+
+ idx = calc_wheel_index(timer->expires, base->clk);
+ enqueue_timer(base, timer, idx);
+}
+
#ifdef CONFIG_DEBUG_OBJECTS_TIMERS

static struct debug_obj_descr timer_debug_descr;
@@ -1059,7 +1052,6 @@ __mod_timer(struct timer_list *timer, unsigned long expires, unsigned int option
*/
if (idx != UINT_MAX && clk == base->clk) {
enqueue_timer(base, timer, idx);
- trigger_dyntick_cpu(base, timer);
} else {
internal_add_timer(base, timer);
}
--
2.26.2