fix switch_names() breakage in short-to-short case

We want ->name.len to match the resulting name on *both*
source and target

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

diff --git a/fs/dcache.c b/fs/dcache.c
index fd244c7a7cc0e331101458caebcae512654461a8..eeafc14c2a14ec50f722a7f38d49460bf48c97e0 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1616,8 +1616,11 @@ static void switch_names(struct dentry *dentry, struct dentry *target)
                         */
                        memcpy(dentry->d_iname, target->d_name.name,
                                        target->d_name.len + 1);
+                       dentry->d_name.len = target->d_name.len;
+                       return;
                }
        }
+       do_switch(dentry->d_name.len, target->d_name.len);
 }
 
 /*
@@ -1677,7 +1680,6 @@ already_unhashed:
 
        /* Switch the names.. */
        switch_names(dentry, target);
-       do_switch(dentry->d_name.len, target->d_name.len);
        do_switch(dentry->d_name.hash, target->d_name.hash);
 
        /* ... and switch the parents */
@@ -1787,7 +1789,6 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
        struct dentry *dparent, *aparent;
 
        switch_names(dentry, anon);
-       do_switch(dentry->d_name.len, anon->d_name.len);
        do_switch(dentry->d_name.hash, anon->d_name.hash);
 
        dparent = dentry->d_parent;