drbd: Update some outdated comments to match the code

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_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 706e522..092f827 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -389,8 +389,8 @@
 
 	/* Trying kmalloc first, falling back to vmalloc.
 	 * GFP_KERNEL is ok, as this is done when a lower level disk is
-	 * "attached" to the drbd.  Context is receiver thread or cqueue
-	 * thread.  As we have no disk yet, we are not in the IO path,
+	 * "attached" to the drbd.  Context is receiver thread or drbdsetup /
+	 * netlink process.  As we have no disk yet, we are not in the IO path,
 	 * not even the IO path of the peer. */
 	bytes = sizeof(struct page *)*want;
 	new_pages = kmalloc(bytes, GFP_KERNEL);