percpu: implement optional weak percpu definitions
[linux-2.6.git] / lib / smp_processor_id.c
index e555ab6..4689cb0 100644 (file)
@@ -11,7 +11,6 @@ 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;
 
        if (likely(preempt_count))
                goto out;
@@ -23,9 +22,7 @@ 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);
-
-       if (cpus_equal(current->cpus_allowed, this_mask))
+       if (cpumask_equal(&current->cpus_allowed, cpumask_of(this_cpu)))
                goto out;
 
        /*
@@ -37,7 +34,7 @@ notrace unsigned int debug_smp_processor_id(void)
        /*
         * Avoid recursion:
         */
-       preempt_disable();
+       preempt_disable_notrace();
 
        if (!printk_ratelimit())
                goto out_enable;
@@ -49,7 +46,7 @@ notrace unsigned int debug_smp_processor_id(void)
        dump_stack();
 
 out_enable:
-       preempt_enable_no_resched();
+       preempt_enable_no_resched_notrace();
 out:
        return this_cpu;
 }