mount options: fix tmpfs

Add .show_options super operation to tmpfs.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index f3c51899117f..8d5fb36ea047 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -30,9 +30,12 @@ struct shmem_sb_info {
         unsigned long free_blocks;  /* How many are left for allocation */
         unsigned long max_inodes;   /* How many inodes are allowed */
         unsigned long free_inodes;  /* How many are left for allocation */
+        spinlock_t stat_lock;       /* Serialize shmem_sb_info changes */
+        uid_t uid;                  /* Mount uid for root directory */
+        gid_t gid;                  /* Mount gid for root directory */
+        mode_t mode;                /* Mount mode for root directory */
         int policy;                 /* Default NUMA memory alloc policy */
         nodemask_t policy_nodes;    /* nodemask for preferred and bind */
-        spinlock_t    stat_lock;
 };
 
 static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)