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-rw-r--r--kernel/hrtimer.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 14bc9cf..b728cc5 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -123,6 +123,26 @@ void ktime_get_ts(struct timespec *ts)
EXPORT_SYMBOL_GPL(ktime_get_ts);
/*
+ * Get the coarse grained time at the softirq based on xtime and
+ * wall_to_monotonic.
+ */
+static void hrtimer_get_softirq_time(struct hrtimer_base *base)
+{
+ ktime_t xtim, tomono;
+ unsigned long seq;
+
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ xtim = timespec_to_ktime(xtime);
+ tomono = timespec_to_ktime(wall_to_monotonic);
+
+ } while (read_seqretry(&xtime_lock, seq));
+
+ base[CLOCK_REALTIME].softirq_time = xtim;
+ base[CLOCK_MONOTONIC].softirq_time = ktime_add(xtim, tomono);
+}
+
+/*
* Functions and macros which are different for UP/SMP systems are kept in a
* single place
*/
@@ -586,9 +606,11 @@ int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp)
*/
static inline void run_hrtimer_queue(struct hrtimer_base *base)
{
- ktime_t now = base->get_time();
struct rb_node *node;
+ if (base->get_softirq_time)
+ base->softirq_time = base->get_softirq_time();
+
spin_lock_irq(&base->lock);
while ((node = base->first)) {
@@ -598,7 +620,7 @@ static inline void run_hrtimer_queue(struct hrtimer_base *base)
void *data;
timer = rb_entry(node, struct hrtimer, node);
- if (now.tv64 <= timer->expires.tv64)
+ if (base->softirq_time.tv64 <= timer->expires.tv64)
break;
fn = timer->function;
@@ -641,6 +663,8 @@ void hrtimer_run_queues(void)
struct hrtimer_base *base = __get_cpu_var(hrtimer_bases);
int i;
+ hrtimer_get_softirq_time(base);
+
for (i = 0; i < MAX_HRTIMER_BASES; i++)
run_hrtimer_queue(&base[i]);
}
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