cpumask: Optimize cpumask_of_cpu in lib/smp_processor_id.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>
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index 3b4dc09..9fb2df0 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -11,7 +11,7 @@
{
unsigned long preempt_count = preempt_count();
int this_cpu = raw_smp_processor_id();
- cpumask_t this_mask;
+ cpumask_of_cpu_ptr_declare(this_mask);
if (likely(preempt_count))
goto out;
@@ -23,9 +23,9 @@
* Kernel threads bound to a single CPU can safely use
* smp_processor_id():
*/
- this_mask = cpumask_of_cpu(this_cpu);
+ cpumask_of_cpu_ptr_next(this_mask, cpu);
- if (cpus_equal(current->cpus_allowed, this_mask))
+ if (cpus_equal(current->cpus_allowed, *this_mask))
goto out;
/*