From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 30 Jan 2013 15:13:38 +0000 (-0500)
Subject: __d_materialise_unique() is too generic
X-Git-Tag: v3.12-rc1~1335^2~32
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=740da42efa24ac00dfb40d2f02d9d7f7a485049b;p=kernel%2Fkernel-generic.git

__d_materialise_unique() is too generic

Its first argument is always non-root, while the second one is
always root.

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

diff --git a/fs/dcache.c b/fs/dcache.c
index 0e4b5fa..ada6123 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2394,7 +2394,7 @@ out_err:
  */
 static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
 {
-	struct dentry *dparent, *aparent;
+	struct dentry *dparent;
 
 	dentry_lock_for_move(anon, dentry);
 
@@ -2402,24 +2402,15 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
 	write_seqcount_begin(&anon->d_seq);
 
 	dparent = dentry->d_parent;
-	aparent = anon->d_parent;
 
 	switch_names(dentry, anon);
 	swap(dentry->d_name.hash, anon->d_name.hash);
 
-	dentry->d_parent = (aparent == anon) ? dentry : aparent;
-	list_del(&dentry->d_u.d_child);
-	if (!IS_ROOT(dentry))
-		list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs);
-	else
-		INIT_LIST_HEAD(&dentry->d_u.d_child);
-
-	anon->d_parent = (dparent == dentry) ? anon : dparent;
+	dentry->d_parent = dentry;
+	list_del_init(&dentry->d_u.d_child);
+	anon->d_parent = dparent;
 	list_del(&anon->d_u.d_child);
-	if (!IS_ROOT(anon))
-		list_add(&anon->d_u.d_child, &anon->d_parent->d_subdirs);
-	else
-		INIT_LIST_HEAD(&anon->d_u.d_child);
+	list_add(&anon->d_u.d_child, &dparent->d_subdirs);
 
 	write_seqcount_end(&dentry->d_seq);
 	write_seqcount_end(&anon->d_seq);