drbd: Rename drbd_pp_alloc() to drbd_alloc_pages() and make it non-static

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 1fc1c9e..ef35bbd 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -318,7 +318,7 @@
 		 * In case we block on congestion, we could otherwise run into
 		 * some distributed deadlock, if the other side blocks on
 		 * congestion as well, because our receiver blocks in
-		 * drbd_pp_alloc due to pp_in_use > max_buffers. */
+		 * drbd_alloc_pages due to pp_in_use > max_buffers. */
 		drbd_free_peer_req(mdev, peer_req);
 		peer_req = NULL;
 		inc_rs_pending(mdev);
@@ -1087,7 +1087,7 @@
 	 * In case we block on congestion, we could otherwise run into
 	 * some distributed deadlock, if the other side blocks on
 	 * congestion as well, because our receiver blocks in
-	 * drbd_pp_alloc due to pp_in_use > max_buffers. */
+	 * drbd_alloc_pages due to pp_in_use > max_buffers. */
 	drbd_free_peer_req(mdev, peer_req);
 	peer_req = NULL;
 	inc_rs_pending(mdev);
@@ -1156,7 +1156,7 @@
 	 * In case we block on congestion, we could otherwise run into
 	 * some distributed deadlock, if the other side blocks on
 	 * congestion as well, because our receiver blocks in
-	 * drbd_pp_alloc due to pp_in_use > max_buffers. */
+	 * drbd_alloc_pages due to pp_in_use > max_buffers. */
 	drbd_free_peer_req(mdev, peer_req);
 	if (!eq)
 		drbd_ov_out_of_sync_found(mdev, sector, size);