autofs: use IS_ROOT to replace root dentry checks

Use the helper macro !IS_ROOT to replace parent != dentry->d_parent.  Just
clean up.

Signed-off-by: Rui Xiang <rui.xiang@huawei.com>
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 92ef341..2caf36a 100644 (file)
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -558,7 +558,7 @@ static int autofs4_dir_symlink(struct inode *dir,
        dget(dentry);
        atomic_inc(&ino->count);
        p_ino = autofs4_dentry_ino(dentry->d_parent);
-       if (p_ino && dentry->d_parent != dentry)
+       if (p_ino && !IS_ROOT(dentry))
                atomic_inc(&p_ino->count);
 
        dir->i_mtime = CURRENT_TIME;
@@ -593,7 +593,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
 
        if (atomic_dec_and_test(&ino->count)) {
                p_ino = autofs4_dentry_ino(dentry->d_parent);
-               if (p_ino && dentry->d_parent != dentry)
+               if (p_ino && !IS_ROOT(dentry))
                        atomic_dec(&p_ino->count);
        }
        dput(ino->dentry);
@@ -732,7 +732,7 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, umode_t m
        dget(dentry);
        atomic_inc(&ino->count);
        p_ino = autofs4_dentry_ino(dentry->d_parent);
-       if (p_ino && dentry->d_parent != dentry)
+       if (p_ino && !IS_ROOT(dentry))
                atomic_inc(&p_ino->count);
        inc_nlink(dir);
        dir->i_mtime = CURRENT_TIME;