NFS: discard nfs_lockowner structure.

It now has only one field and is only used in one structure.
So replaced it in that structure by the field it contains.

Signed-off-by: NeilBrown <[e-mail]>
Reviewed-by: Jeff Layton <[e-mail]>
Signed-off-by: Trond Myklebust <[e-mail]>

fs/nfs/inode.c

···
 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
 {
 	atomic_set(&l_ctx->count, 1);
-	l_ctx->lockowner.l_owner = current->files;
+	l_ctx->lockowner = current->files;
 	INIT_LIST_HEAD(&l_ctx->list);
 	atomic_set(&l_ctx->io_count, 0);
 }
···
 	struct nfs_lock_context *pos = head;
 
 	do {
-		if (pos->lockowner.l_owner != current->files)
+		if (pos->lockowner != current->files)
 			continue;
 		atomic_inc(&pos->count);
 		return pos;

fs/nfs/nfs4state.c

···
 	if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
 		goto out;
 
-	fl_owner = l_ctx->lockowner.l_owner;
+	fl_owner = l_ctx->lockowner;
 	fl_flock_owner = l_ctx->open_context->flock_owner;
 
 	spin_lock(&state->state_lock);

fs/nfs/pagelist.c

···
 static bool nfs_match_lock_context(const struct nfs_lock_context *l1,
 		const struct nfs_lock_context *l2)
 {
-	return l1->lockowner.l_owner == l2->lockowner.l_owner;
+	return l1->lockowner == l2->lockowner;
 }
 
 /**

fs/nfs/write.c

···
 		if (l_ctx && flctx &&
 		    !(list_empty_careful(&flctx->flc_posix) &&
 		      list_empty_careful(&flctx->flc_flock))) {
-			do_flush |= l_ctx->lockowner.l_owner != current->files;
+			do_flush |= l_ctx->lockowner != current->files;
 		}
 		nfs_release_request(req);
 		if (!do_flush)

include/linux/nfs_fs.h

···
 	struct rcu_head		rcu_head;
 };
 
-struct nfs_lockowner {
-	fl_owner_t l_owner;
-};
-
 struct nfs_lock_context {
 	atomic_t count;
 	struct list_head list;
 	struct nfs_open_context *open_context;
-	struct nfs_lockowner lockowner;
+	fl_owner_t lockowner;
 	atomic_t io_count;
 };