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authorMike Travis <travis@sgi.com>2008-07-15 14:14:34 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-18 22:02:59 +0200
commitc18a41fbbc500ac0307ffd2b0ae73c2af9d0b0ab (patch)
tree4242e1bdd8200ef00b5ae5da5d717231fa90a430 /kernel
parent333cdd1f0e5e0aad6b7f8992291563bc7b14670b (diff)
downloadop-kernel-dev-c18a41fbbc500ac0307ffd2b0ae73c2af9d0b0ab.zip
op-kernel-dev-c18a41fbbc500ac0307ffd2b0ae73c2af9d0b0ab.tar.gz
cpumask: Optimize cpumask_of_cpu in kernel/time/tick-common.c
* Optimize various places where a pointer to the cpumask_of_cpu value will result in reducing stack pressure. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/time/tick-common.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 4f38865..bf43284 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -135,7 +135,7 @@ void tick_setup_periodic(struct clock_event_device *dev, int broadcast)
*/
static void tick_setup_device(struct tick_device *td,
struct clock_event_device *newdev, int cpu,
- cpumask_t cpumask)
+ const cpumask_t *cpumask)
{
ktime_t next_event;
void (*handler)(struct clock_event_device *) = NULL;
@@ -169,8 +169,8 @@ static void tick_setup_device(struct tick_device *td,
* When the device is not per cpu, pin the interrupt to the
* current cpu:
*/
- if (!cpus_equal(newdev->cpumask, cpumask))
- irq_set_affinity(newdev->irq, cpumask);
+ if (!cpus_equal(newdev->cpumask, *cpumask))
+ irq_set_affinity(newdev->irq, *cpumask);
/*
* When global broadcasting is active, check if the current
@@ -196,20 +196,20 @@ static int tick_check_new_device(struct clock_event_device *newdev)
struct tick_device *td;
int cpu, ret = NOTIFY_OK;
unsigned long flags;
- cpumask_t cpumask;
+ cpumask_of_cpu_ptr_declare(cpumask);
spin_lock_irqsave(&tick_device_lock, flags);
cpu = smp_processor_id();
+ cpumask_of_cpu_ptr_next(cpumask, cpu);
if (!cpu_isset(cpu, newdev->cpumask))
goto out_bc;
td = &per_cpu(tick_cpu_device, cpu);
curdev = td->evtdev;
- cpumask = cpumask_of_cpu(cpu);
/* cpu local device ? */
- if (!cpus_equal(newdev->cpumask, cpumask)) {
+ if (!cpus_equal(newdev->cpumask, *cpumask)) {
/*
* If the cpu affinity of the device interrupt can not
@@ -222,7 +222,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
* If we have a cpu local device already, do not replace it
* by a non cpu local device
*/
- if (curdev && cpus_equal(curdev->cpumask, cpumask))
+ if (curdev && cpus_equal(curdev->cpumask, *cpumask))
goto out_bc;
}
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