From: Linus Torvalds <torvalds@g5.osdl.org>
Date: Wed, 21 Jun 2006 02:44:03 +0000 (-0700)
Subject: Fix up CFQ scheduler for recent rbtree node shrinkage
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=6b41fd1785f4effe2f3bd40da864415812f5b8c9;p=deliverable%2Flinux.git

Fix up CFQ scheduler for recent rbtree node shrinkage

The color is now in the low bits of the parent pointer, and initializing
it to 0 happens as part of the whole memset above, so just remove the
unnecessary RB_CLEAR_COLOR.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 6200d9b9af28..e2e6ad0a158e 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1318,7 +1318,6 @@ cfq_alloc_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
 
 	if (cic) {
 		memset(cic, 0, sizeof(*cic));
-		RB_CLEAR_COLOR(&cic->rb_node);
 		cic->last_end_request = jiffies;
 		INIT_LIST_HEAD(&cic->queue_list);
 		cic->dtor = cfq_free_io_context;