[PATCH] sched: hardcode non-smp set_cpus_allowed

Simplify the UP (1 CPU) implementatin of set_cpus_allowed.

The one CPU is hardcoded to be cpu 0 - so just test for that bit, and avoid
having to pick up the cpu_online_map.

Also, unexport cpu_online_map: it was only needed for set_cpus_allowed().

Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/sched.h b/include/linux/sched.h
index b2d2dc14f0b9bdf944ee88c602dd2a73e917f94d..41285a0e7258eb45e164a24bb1055050aa8e35d8 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -940,7 +940,7 @@ extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
 #else
 static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
 {
-       if (!cpus_intersects(new_mask, cpu_online_map))
+       if (!cpu_isset(0, new_mask))
                return -EINVAL;
        return 0;
 }

diff --git a/kernel/sched.c b/kernel/sched.c
index 4f26c544d02c3c308693c92116c46b1d5ce2b76b..340dd238c16da8044acf88527e3c07feb9472c20 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3877,7 +3877,6 @@ EXPORT_SYMBOL(cpu_present_map);
 
 #ifndef CONFIG_SMP
 cpumask_t cpu_online_map = CPU_MASK_ALL;
-EXPORT_SYMBOL_GPL(cpu_online_map);
 cpumask_t cpu_possible_map = CPU_MASK_ALL;
 #endif