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-rw-r--r--fs/sync.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/sync.c b/fs/sync.c
index 7cd005ea..228e17b 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -64,7 +64,7 @@ int file_fsync(struct file *filp, struct dentry *dentry, int datasync)
/* sync the superblock to buffers */
sb = inode->i_sb;
lock_super(sb);
- if (sb->s_op->write_super)
+ if (sb->s_dirt && sb->s_op->write_super)
sb->s_op->write_super(sb);
unlock_super(sb);
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