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Diffstat (limited to 'kernel/timer.c')
-rw-r--r--kernel/timer.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/kernel/timer.c b/kernel/timer.c
index 9199f3c52215..2454172a80d3 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -750,13 +750,18 @@ unsigned long apply_slack(struct timer_list *timer, unsigned long expires)
unsigned long expires_limit, mask;
int bit;
- expires_limit = expires + timer->slack;
+ expires_limit = expires;
- if (timer->slack < 0) /* auto slack: use 0.4% */
- expires_limit = expires + (expires - jiffies)/256;
+ if (timer->slack >= 0) {
+ expires_limit = expires + timer->slack;
+ } else {
+ unsigned long now = jiffies;
+ /* No slack, if already expired else auto slack 0.4% */
+ if (time_after(expires, now))
+ expires_limit = expires + (expires - now)/256;
+ }
mask = expires ^ expires_limit;
-
if (mask == 0)
return expires;
@@ -1679,11 +1684,14 @@ static int __cpuinit timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
+ int err;
+
switch(action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
- if (init_timers_cpu(cpu) < 0)
- return NOTIFY_BAD;
+ err = init_timers_cpu(cpu);
+ if (err < 0)
+ return notifier_from_errno(err);
break;
#ifdef CONFIG_HOTPLUG_CPU
case CPU_DEAD: