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Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 3a45b7dd0a09..ccbdb22147bb 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -526,8 +526,18 @@ long do_get_mempolicy(int *policy, nodemask_t *nmask,
struct mempolicy *pol = current->mempolicy;
cpuset_update_task_memory_state();
- if (flags & ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR))
+ if (flags &
+ ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR|MPOL_F_MEMS_ALLOWED))
return -EINVAL;
+
+ if (flags & MPOL_F_MEMS_ALLOWED) {
+ if (flags & (MPOL_F_NODE|MPOL_F_ADDR))
+ return -EINVAL;
+ *policy = 0; /* just so it's initialized */
+ *nmask = cpuset_current_mems_allowed;
+ return 0;
+ }
+
if (flags & MPOL_F_ADDR) {
down_read(&mm->mmap_sem);
vma = find_vma_intersection(mm, addr, addr+1);