debugfs_mknod(): get rid useless arguments

dev is always zero, dir was only used to get its ->i_sb, which is
equal to ->d_sb of dentry...

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

1 files changed, 11 insertions, 17 deletions

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index c69e00d69ff1..bc02e2096977 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -70,23 +70,18 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev
 }
 
 /* SMP-safe */
-static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
-                         umode_t mode, dev_t dev, void *data,
+static int debugfs_mknod(struct dentry *dentry,
+                         umode_t mode, void *data,
                          const struct file_operations *fops)
 {
         struct inode *inode;
-        int error = -EPERM;
 
-        if (dentry->d_inode)
-                return -EEXIST;
-
-        inode = debugfs_get_inode(dir->i_sb, mode, dev, data, fops);
-        if (inode) {
-                d_instantiate(dentry, inode);
-                dget(dentry);
-                error = 0;
-        }
-        return error;
+        inode = debugfs_get_inode(dentry->d_sb, mode, 0, data, fops);
+        if (unlikely(!inode))
+                return -EPERM;
+        d_instantiate(dentry, inode);
+        dget(dentry);
+        return 0;
 }
 
 static int debugfs_mkdir(struct dentry *dentry, umode_t mode)
@@ -95,7 +90,7 @@ static int debugfs_mkdir(struct dentry *dentry, umode_t mode)
         int res;
 
         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
-        res = debugfs_mknod(dir, dentry, mode, 0, NULL, NULL);
+        res = debugfs_mknod(dentry, mode, NULL, NULL);
         if (!res) {
                 inc_nlink(dir);
                 fsnotify_mkdir(dir, dentry);
@@ -110,7 +105,7 @@ static int debugfs_create(struct dentry *dentry, umode_t mode,
         int res;
 
         mode = (mode & S_IALLUGO) | S_IFREG;
-        res = debugfs_mknod(dir, dentry, mode, 0, data, fops);
+        res = debugfs_mknod(dentry, mode, data, fops);
         if (!res)
                 fsnotify_create(dir, dentry);
         return res;
@@ -458,8 +453,7 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
                 return NULL;
         }
 
-        error = debugfs_mknod(dentry->d_parent->d_inode, dentry,
-                              S_IFLNK | S_IRWXUGO, 0, link, NULL);
+        error = debugfs_mknod(dentry, S_IFLNK | S_IRWXUGO, link, NULL);
         if (error)
                 kfree(link);