ext4: Don't use ext4_dec_count() if not needed

The ext4_dec_count() function is only needed when dropping the i_nlink
count on inodes which are (or which could be) directories.  If we
*know* that the inode in question can't possibly be a directory, use
drop_nlink or clear_nlink() if we know i_nlink is 1.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index fffd0807a01b..5a79c6b6dc69 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2161,7 +2161,7 @@ static int ext4_unlink(struct inode * dir, struct dentry *dentry)
         dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
         ext4_update_dx_flag(dir);
         ext4_mark_inode_dirty(handle, dir);
-        ext4_dec_count(handle, inode);
+        drop_nlink(inode);
         if (!inode->i_nlink)
                 ext4_orphan_add(handle, inode);
         inode->i_ctime = ext4_current_time(inode);
@@ -2211,7 +2211,7 @@ retry:
                 err = __page_symlink(inode, symname, l,
                                 mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
                 if (err) {
-                        ext4_dec_count(handle, inode);
+                        clear_nlink(inode);
                         ext4_mark_inode_dirty(handle, inode);
                         iput (inode);
                         goto out_stop;
@@ -2404,7 +2404,7 @@ static int ext4_rename (struct inode * old_dir, struct dentry *old_dentry,
                 ext4_dec_count(handle, old_dir);
                 if (new_inode) {
                         /* checked empty_dir above, can't have another parent,
-                         * ext3_dec_count() won't work for many-linked dirs */
+                         * ext4_dec_count() won't work for many-linked dirs */
                         new_inode->i_nlink = 0;
                 } else {
                         ext4_inc_count(handle, new_dir);