cpumask: Optimize cpumask_of_cpu in arch/x86/kernel/ldt.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/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a844957..3fee2aa 100644 (file)
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -62,12 +62,12 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
 
        if (reload) {
 #ifdef CONFIG_SMP
-               cpumask_t mask;
+               cpumask_of_cpu_ptr_declare(mask);
 
                preempt_disable();
                load_LDT(pc);
-               mask = cpumask_of_cpu(smp_processor_id());
-               if (!cpus_equal(current->mm->cpu_vm_mask, mask))
+               cpumask_of_cpu_ptr_next(mask, smp_processor_id());
+               if (!cpus_equal(current->mm->cpu_vm_mask, *mask))
                        smp_call_function(flush_ldt, current->mm, 1);
                preempt_enable();
 #else