Use node_to_cpumask_ptr in place of node_to_cpumask to reduce stack
requirements in sched.c

Applies to linux-2.6.tip/master.

Signed-off-by: Mike Travis
Acked-by: Rusty Russell
---
kernel/sched.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

--- linux-2.6.28.orig/kernel/sched.c
+++ linux-2.6.28/kernel/sched.c
@@ -6118,8 +6118,9 @@ static void move_task_off_dead_cpu(int d

do {
/* On same node? */
- mask = node_to_cpumask(cpu_to_node(dead_cpu));
- cpus_and(mask, mask, p->cpus_allowed);
+ node_to_cpumask_ptr(pnodemask, cpu_to_node(dead_cpu));
+
+ cpus_and(mask, *pnodemask, p->cpus_allowed);
dest_cpu = any_online_cpu(mask);

/* On any allowed CPU? */
@@ -7127,9 +7128,9 @@ static int cpu_to_allnodes_group(int cpu
struct sched_group **sg, cpumask_t *nodemask)
{
int group;
+ node_to_cpumask_ptr(pnodemask, cpu_to_node(cpu));

- *nodemask = node_to_cpumask(cpu_to_node(cpu));
- cpus_and(*nodemask, *nodemask, *cpu_map);
+ cpus_and(*nodemask, *pnodemask, *cpu_map);
group = first_cpu(*nodemask);

if (sg)
@@ -7179,9 +7180,9 @@ static void free_sched_groups(const cpum

for (i = 0; i < nr_node_ids; i++) {
struct sched_group *oldsg, *sg = sched_group_nodes[i];
+ node_to_cpumask_ptr(pnodemask, i);

- *nodemask = node_to_cpumask(i);
- cpus_and(*nodemask, *nodemask, *cpu_map);
+ cpus_and(*nodemask, *pnodemask, *cpu_map);
if (cpus_empty(*nodemask))
continue;


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