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-rw-r--r--fs/nfs/super.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 75bcc3f0e0b5..e288f06d3fa7 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1977,6 +1977,15 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
if (error < 0)
goto out;
+ /*
+ * noac is a special case. It implies -o sync, but that's not
+ * necessarily reflected in the mtab options. do_remount_sb
+ * will clear MS_SYNCHRONOUS if -o sync wasn't specified in the
+ * remount options, so we have to explicitly reset it.
+ */
+ if (data->flags & NFS_MOUNT_NOAC)
+ *flags |= MS_SYNCHRONOUS;
+
/* compare new mount options with old ones */
error = nfs_compare_remount_data(nfss, data);
out: