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Commit 4755b929 authored by Mike Travis's avatar Mike Travis Committed by Ingo Molnar
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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: default avatarMike Travis <travis@sgi.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent c18a41fb

lib/smp_processor_id.c

+3 −3
Original line number Diff line number Diff line
@@ -11,7 +11,7 @@ notrace unsigned int debug_smp_processor_id(void) 
{

	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 @@ notrace unsigned int debug_smp_processor_id(void) 
	 * 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;



	/*