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| author | Mike Travis <travis@sgi.com> | 2008-07-15 14:14:35 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 22:02:59 +0200 |
| commit | 4755b9291204982ac908e069674d6e5eb45815b3 (patch) | |
| tree | 9e5270d79609e3ba0888ed4fff778f3f9adf7c68 /lib/smp_processor_id.c | |
| parent | c18a41fbbc500ac0307ffd2b0ae73c2af9d0b0ab (diff) | |
| download | lwn-4755b9291204982ac908e069674d6e5eb45815b3.tar.gz lwn-4755b9291204982ac908e069674d6e5eb45815b3.zip | |
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>
Diffstat (limited to 'lib/smp_processor_id.c')
| -rw-r--r-- | lib/smp_processor_id.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c index 3b4dc098181e..9fb2df0d8dfb 100644 --- a/lib/smp_processor_id.c +++ b/lib/smp_processor_id.c @@ -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; /* |