[PATCH] fat: remove the unneeded vfat_find() in vfat_rename()

Now, vfat_rename() is using vfat_find() for sanity check.  This removes that
sanity check, the cost of sanity check is too high.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 12 deletions

diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c
index 467346b123d9..ef46939c0c1a 100644
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -887,10 +887,10 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
 {
         struct buffer_head *dotdot_bh;
         struct msdos_dir_entry *dotdot_de;
-        loff_t dotdot_i_pos;
         struct inode *old_inode, *new_inode;
         struct fat_slot_info old_sinfo, sinfo;
         struct timespec ts;
+        loff_t dotdot_i_pos, new_i_pos;
         int err, is_dir, update_dotdot, corrupt = 0;
 
         old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
@@ -913,31 +913,24 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
 
         ts = CURRENT_TIME_SEC;
         if (new_inode) {
-                err = vfat_find(new_dir, &new_dentry->d_name, &sinfo);
-                if (err)
-                        goto out;
-                if (MSDOS_I(new_inode)->i_pos != sinfo.i_pos) {
-                        /* WTF??? Cry and fail. */
-                        printk(KERN_WARNING "vfat_rename: fs corrupted\n");
-                        goto out;
-                }
-
                 if (is_dir) {
                         err = fat_dir_empty(new_inode);
                         if (err)
                                 goto out;
                 }
+                new_i_pos = MSDOS_I(new_inode)->i_pos;
                 fat_detach(new_inode);
         } else {
                 err = vfat_add_entry(new_dir, &new_dentry->d_name, is_dir, 0,
                                      &ts, &sinfo);
                 if (err)
                         goto out;
+                new_i_pos = sinfo.i_pos;
         }
         new_dir->i_version++;
 
         fat_detach(old_inode);
-        fat_attach(old_inode, sinfo.i_pos);
+        fat_attach(old_inode, new_i_pos);
         if (IS_DIRSYNC(new_dir)) {
                 err = fat_sync_inode(old_inode);
                 if (err)
@@ -1001,7 +994,7 @@ error_inode:
         fat_detach(old_inode);
         fat_attach(old_inode, old_sinfo.i_pos);
         if (new_inode) {
-                fat_attach(new_inode, sinfo.i_pos);
+                fat_attach(new_inode, new_i_pos);
                 if (corrupt)
                         corrupt |= fat_sync_inode(new_inode);
         } else {