sched: convert sched_domain_debug to cpumask_var_t.
Impact: stack usage reduction
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
stack space. cpumask_var_t is just a struct cpumask for
!CONFIG_CPUMASK_OFFSTACK.
In this case, we always alloced, but we don't need to any more.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/sched.c b/kernel/sched.c
index 2d4ff91..24012c2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6706,7 +6706,7 @@
static void sched_domain_debug(struct sched_domain *sd, int cpu)
{
- cpumask_t *groupmask;
+ cpumask_var_t groupmask;
int level = 0;
if (!sd) {
@@ -6716,8 +6716,7 @@
printk(KERN_DEBUG "CPU%d attaching sched-domain:\n", cpu);
- groupmask = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
- if (!groupmask) {
+ if (!alloc_cpumask_var(&groupmask, GFP_KERNEL)) {
printk(KERN_DEBUG "Cannot load-balance (out of memory)\n");
return;
}
@@ -6730,7 +6729,7 @@
if (!sd)
break;
}
- kfree(groupmask);
+ free_cpumask_var(groupmask);
}
#else /* !CONFIG_SCHED_DEBUG */
# define sched_domain_debug(sd, cpu) do { } while (0)