[PATCH v2 23/37] hrtimer: Split hrtimer_start_range_ns()

Anna-Maria Gleixner
2017-10-22T21:46:44Z

[-- Attachment #1: hrtimer_Split_out_code_from_hrtimer_start_range_ns_for_reuse.patch --]
[-- Type: text/plain, Size: 2352 bytes --]

From: Anna-Maria Gleixner <anna-maria@linutronix.de>

Preparatory patch for softirq based hrtimers to avoid code duplication. No
functional change.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
---
kernel/time/hrtimer.c | 44 ++++++++++++++++++++++++--------------------
1 file changed, 24 insertions(+), 20 deletions(-)

--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -916,22 +916,11 @@ static inline ktime_t hrtimer_update_low
return tim;
}

-/**
- * hrtimer_start_range_ns - (re)start an hrtimer
- * @timer: the timer to be added
- * @tim: expiry time
- * @delta_ns: "slack" range for the timer
- * @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
- * relative (HRTIMER_MODE_REL), and pinned (HRTIMER_MODE_PINNED)
- */
-void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
- u64 delta_ns, const enum hrtimer_mode mode)
+static int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
+ u64 delta_ns, const enum hrtimer_mode mode,
+ struct hrtimer_clock_base *base)
{
- struct hrtimer_clock_base *base, *new_base;
- unsigned long flags;
- int leftmost;
-
- base = lock_hrtimer_base(timer, &flags);
+ struct hrtimer_clock_base *new_base;

/* Remove an active timer from the queue: */
remove_hrtimer(timer, base, true);
@@ -946,13 +935,28 @@ void hrtimer_start_range_ns(struct hrtim
/* Switch the timer base, if necessary: */
new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);

- leftmost = enqueue_hrtimer(timer, new_base, mode);
- if (!leftmost)
- goto unlock;
+ return enqueue_hrtimer(timer, new_base, mode);
+}
+
+/**
+ * hrtimer_start_range_ns - (re)start an hrtimer
+ * @timer: the timer to be added
+ * @tim: expiry time
+ * @delta_ns: "slack" range for the timer
+ * @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
+ * relative (HRTIMER_MODE_REL), and pinned (HRTIMER_MODE_PINNED)
+ */
+void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
+ u64 delta_ns, const enum hrtimer_mode mode)
+{
+ struct hrtimer_clock_base *base;
+ unsigned long flags;
+
+ base = lock_hrtimer_base(timer, &flags);

- hrtimer_reprogram(timer);
+ if (__hrtimer_start_range_ns(timer, tim, delta_ns, mode, base))
+ hrtimer_reprogram(timer);

-unlock:
unlock_hrtimer_base(timer, &flags);
}
EXPORT_SYMBOL_GPL(hrtimer_start_range_ns);