generic: reduce stack pressure in sched_affinity
* Modify sched_affinity functions to pass cpumask_t variables by reference
instead of by value.
* Use new set_cpus_allowed_ptr function.
Depends on:
[sched-devel]: sched: add new set_cpus_allowed_ptr function
Cc: Paul Jackson <pj@sgi.com>
Cc: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/sched.c b/kernel/sched.c
index ccc23a9..1a82523 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4908,9 +4908,10 @@
return retval;
}
-long sched_setaffinity(pid_t pid, cpumask_t new_mask)
+long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
{
cpumask_t cpus_allowed;
+ cpumask_t new_mask = *in_mask;
struct task_struct *p;
int retval;
@@ -4991,7 +4992,7 @@
if (retval)
return retval;
- return sched_setaffinity(pid, new_mask);
+ return sched_setaffinity(pid, &new_mask);
}
/*