__d_add(): don't drop/regain ->d_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 11 insertions, 3 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index 4962a7b4384e..20394fb6f967 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2366,11 +2366,19 @@ EXPORT_SYMBOL(d_rehash);
 
 static inline void __d_add(struct dentry *dentry, struct inode *inode)
 {
+        spin_lock(&dentry->d_lock);
         if (inode) {
-                __d_instantiate(dentry, inode);
+                unsigned add_flags = d_flags_for_inode(inode);
+                hlist_add_head(&dentry->d_u.d_alias, &inode->i_dentry);
+                raw_write_seqcount_begin(&dentry->d_seq);
+                __d_set_inode_and_type(dentry, inode, add_flags);
+                raw_write_seqcount_end(&dentry->d_seq);
+                __fsnotify_d_instantiate(dentry);
+        }
+        _d_rehash(dentry);
+        spin_unlock(&dentry->d_lock);
+        if (inode)
                 spin_unlock(&inode->i_lock);
-        }
-        d_rehash(dentry);
 }
 
 /**