vfs: bug on rehash of hashed dentry

diff --git a/fs/dcache.c b/fs/dcache.c
index d96047b4a633a86cb7ae711cb29362ac6cda061a..437c93cd861484c0e5e81e86885b27a800575f38 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1563,6 +1563,7 @@ static void _d_rehash(struct dentry * entry)
  
 void d_rehash(struct dentry * entry)
 {
+       BUG_ON(!d_unhashed(entry));
        spin_lock(&dcache_lock);
        spin_lock(&entry->d_lock);
        _d_rehash(entry);