Simplify devpts_pty_new()

devpts_pty_new() is called when setting up a new pty and would not
will not have an existing dentry or inode for the pty. So don't bother
looking for an existing dentry - just create a new one.

Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index b292ed7..50e885f 100644 (file)
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -220,6 +220,7 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
        dev_t device = MKDEV(driver->major, driver->minor_start+number);
        struct dentry *dentry;
        struct inode *inode = new_inode(devpts_mnt->mnt_sb);
+       char s[12];
 
        /* We're supposed to be given the slave end of a pty */
        BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
@@ -235,9 +236,13 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
        init_special_inode(inode, S_IFCHR|config.mode, device);
        inode->i_private = tty;
 
-       dentry = get_node(number);
-       if (!IS_ERR(dentry) && !dentry->d_inode) {
-               d_instantiate(dentry, inode);
+       sprintf(s, "%d", number);
+
+       mutex_lock(&devpts_root->d_inode->i_mutex);
+
+       dentry = d_alloc_name(devpts_root, s);
+       if (!IS_ERR(dentry)) {
+               d_add(dentry, inode);
                fsnotify_create(devpts_root->d_inode, dentry);
        }