From: Alasdair G Kergon <agk@redhat.com>
Date: Wed, 8 Apr 2009 23:27:13 +0000 (+0100)
Subject: dm: rearrange dm_wq_work
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=df12ee996378a5917e9555169fe278ecca0612d4;p=linux-beck.git

dm: rearrange dm_wq_work

Refactor dm_wq_work() to make later patch more readable.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index ab3b5d84df65..020a9e1993a7 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1437,18 +1437,19 @@ static void dm_wq_work(struct work_struct *work)
 
 	down_write(&md->io_lock);
 
-next_bio:
-	spin_lock_irq(&md->deferred_lock);
-	c = bio_list_pop(&md->deferred);
-	spin_unlock_irq(&md->deferred_lock);
+	while (1) {
+		spin_lock_irq(&md->deferred_lock);
+		c = bio_list_pop(&md->deferred);
+		spin_unlock_irq(&md->deferred_lock);
+
+		if (!c) {
+			clear_bit(DMF_BLOCK_IO, &md->flags);
+			break;
+		}
 
-	if (c) {
 		__split_and_process_bio(md, c);
-		goto next_bio;
 	}
 
-	clear_bit(DMF_BLOCK_IO, &md->flags);
-
 	up_write(&md->io_lock);
 }