mpol_shared_policy_init() does not need to use a pseudo-vma: it can use
sp_alloc() and sp_insert() directly, since the object's shared policy
tree is empty and inaccessible (needing no lock) at get_inode() time.
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
---
mm/mempolicy.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 065e886ec9b6..a22b641cfd6b 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2749,7 +2749,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol)
rwlock_init(&sp->lock);
if (mpol) {
- struct vm_area_struct pvma;
+ struct sp_node *n;
struct mempolicy *new;
NODEMASK_SCRATCH(scratch);
@@ -2766,11 +2766,10 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol)
if (ret)
goto put_new;
- /* Create pseudo-vma that contains just the policy */
- vma_init(&pvma, NULL);
- pvma.vm_end = TASK_SIZE; /* policy covers entire file */
- mpol_set_shared_policy(sp, &pvma, new); /* adds ref */
-
+ /* alloc node covering entire file; adds ref to new */
+ n = sp_alloc(0, MAX_LFS_FILESIZE >> PAGE_SHIFT, new);
+ if (n)
+ sp_insert(sp, n);
put_new:
mpol_put(new); /* drop initial ref */
free_scratch:
--
2.35.3
