[PATCH] Fix memory leak in epoll

There was a memory leak in epoll.

The reference count (d_count) of the struct dentry of a new epoll-fd was
set to TWO.  (new_inode() assigned ONE, than ep_getfd() incremented it by
dget()).  There was only ONE reference to this dentry, so struct dentry and
struct inode were never freed.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/eventpoll.c

@@ -716,7 +716,7 @@ static int ep_getfd(int *efd, struct inode **einode, struct file **efile)
 	dentry->d_op = &eventpollfs_dentry_operations;
 	d_add(dentry, inode);
 	file->f_vfsmnt = mntget(eventpoll_mnt);
-	file->f_dentry = dget(dentry);
+	file->f_dentry = dentry;
 	file->f_mapping = inode->i_mapping;
 
 	file->f_pos = 0;