1 files changed, 20 insertions, 3 deletions

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index b961ceac66b4..9b7dd7013b15 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2035,9 +2035,6 @@ static inline void nfs_initialise_sb(struct super_block *sb)
                 sb->s_blocksize = nfs_block_bits(server->wsize,
                                                  &sb->s_blocksize_bits);
 
-        if (server->flags & NFS_MOUNT_NOAC)
-                sb->s_flags |= MS_SYNCHRONOUS;
-
         sb->s_bdi = &server->backing_dev_info;
 
         nfs_super_set_maxbytes(sb, server->maxfilesize);
@@ -2249,6 +2246,10 @@ static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
         if (server->flags & NFS_MOUNT_UNSHARED)
                 compare_super = NULL;
 
+        /* -o noac implies -o sync */
+        if (server->flags & NFS_MOUNT_NOAC)
+                sb_mntdata.mntflags |= MS_SYNCHRONOUS;
+
         /* Get a superblock - note that we may end up sharing one that already exists */
         s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
         if (IS_ERR(s)) {
@@ -2361,6 +2362,10 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags,
         if (server->flags & NFS_MOUNT_UNSHARED)
                 compare_super = NULL;
 
+        /* -o noac implies -o sync */
+        if (server->flags & NFS_MOUNT_NOAC)
+                sb_mntdata.mntflags |= MS_SYNCHRONOUS;
+
         /* Get a superblock - note that we may end up sharing one that already exists */
         s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
         if (IS_ERR(s)) {
@@ -2628,6 +2633,10 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags,
         if (server->flags & NFS4_MOUNT_UNSHARED)
                 compare_super = NULL;
 
+        /* -o noac implies -o sync */
+        if (server->flags & NFS_MOUNT_NOAC)
+                sb_mntdata.mntflags |= MS_SYNCHRONOUS;
+
         /* Get a superblock - note that we may end up sharing one that already exists */
         s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
         if (IS_ERR(s)) {
@@ -2916,6 +2925,10 @@ nfs4_xdev_mount(struct file_system_type *fs_type, int flags,
         if (server->flags & NFS4_MOUNT_UNSHARED)
                 compare_super = NULL;
 
+        /* -o noac implies -o sync */
+        if (server->flags & NFS_MOUNT_NOAC)
+                sb_mntdata.mntflags |= MS_SYNCHRONOUS;
+
         /* Get a superblock - note that we may end up sharing one that already exists */
         s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
         if (IS_ERR(s)) {
@@ -3003,6 +3016,10 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags,
         if (server->flags & NFS4_MOUNT_UNSHARED)
                 compare_super = NULL;
 
+        /* -o noac implies -o sync */
+        if (server->flags & NFS_MOUNT_NOAC)
+                sb_mntdata.mntflags |= MS_SYNCHRONOUS;
+
         /* Get a superblock - note that we may end up sharing one that already exists */
         s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
         if (IS_ERR(s)) {