Rename packages to recipes to sync the overlay with mainline oe.dev

[openpandora.oe.git] / recipes / linux / omap3-pandora-kernel / timer-suppression.patch

diff --git a/recipes/linux/omap3-pandora-kernel/timer-suppression.patch b/recipes/linux/omap3-pandora-kernel/timer-suppression.patch
new file mode 100755 (executable)
index 0000000..04362c9
--- /dev/null
+++ b/recipes/linux/omap3-pandora-kernel/timer-suppression.patch
@@ -0,0 +1,43 @@
+diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
+index b854a89..26f5569 100644
+--- a/kernel/time/tick-sched.c
++++ b/kernel/time/tick-sched.c
+@@ -253,6 +253,16 @@ void tick_nohz_stop_sched_tick(void)
+ 
+       /* Schedule the tick, if we are at least one jiffie off */
+       if ((long)delta_jiffies >= 1) {
++              /*
++               * calculate the expiry time for the next timer wheel
++               * timer
++               */
++              expires = ktime_add_ns(last_update, tick_period.tv64 *
++                                      delta_jiffies);
++
++              /* Skip reprogram of event if its not changed */
++              if(ts->tick_stopped && ktime_equal(expires, dev->next_event))
++              goto out2;
+ 
+               if (delta_jiffies > 1)
+                       cpu_set(cpu, nohz_cpu_mask);
+@@ -304,12 +314,7 @@ void tick_nohz_stop_sched_tick(void)
+                       goto out;
+               }
+ 
+-              /*
+-               * calculate the expiry time for the next timer wheel
+-               * timer
+-               */
+-              expires = ktime_add_ns(last_update, tick_period.tv64 *
+-                                     delta_jiffies);
++              /* Mark expiries */
+               ts->idle_expires = expires;
+ 
+               if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {
+@@ -328,6 +333,7 @@ void tick_nohz_stop_sched_tick(void)
+               tick_do_update_jiffies64(ktime_get());
+               cpu_clear(cpu, nohz_cpu_mask);
+       }
++out2: 
+       raise_softirq_irqoff(TIMER_SOFTIRQ);
+ out:
+       ts->next_jiffies = next_jiffies;