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-rw-r--r--mm/shmem.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 7162c58355b..5e2ff592e3b 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2486,6 +2486,7 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
unsigned long inodes;
int error = -EINVAL;
+ config.mpol = NULL;
if (shmem_parse_options(data, &config, true))
return error;
@@ -2510,8 +2511,13 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
sbinfo->max_inodes = config.max_inodes;
sbinfo->free_inodes = config.max_inodes - inodes;
- mpol_put(sbinfo->mpol);
- sbinfo->mpol = config.mpol; /* transfers initial ref */
+ /*
+ * Preserve previous mempolicy unless mpol remount option was specified.
+ */
+ if (config.mpol) {
+ mpol_put(sbinfo->mpol);
+ sbinfo->mpol = config.mpol; /* transfers initial ref */
+ }
out:
spin_unlock(&sbinfo->stat_lock);
return error;