From: Alex Elder <elder@inktank.com>
Date: Mon, 17 Dec 2012 18:23:48 +0000 (-0600)
Subject: libceph: don't use rb_init_node() in ceph_osdc_alloc_request()
X-Git-Tag: v3.8-rc2~7^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a978fa20fb657548561dddbfb605fe43654f0825;p=profile%2Fcommon%2Fkernel-common.git

libceph: don't use rb_init_node() in ceph_osdc_alloc_request()

The red-black node in the ceph osd request structure is initialized
in ceph_osdc_alloc_request() using rbd_init_node().  We do need to
initialize this, because in __unregister_request() we call
RB_EMPTY_NODE(), which expects the node it's checking to have
been initialized.  But rb_init_node() is apparently overkill, and
may in fact be on its way out.  So use RB_CLEAR_NODE() instead.

For a little more background, see this commit:
    4c199a93 rbtree: empty nodes have no color"

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
---

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 2bce3d4..7cd0a7f 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -221,7 +221,7 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
 	kref_init(&req->r_kref);
 	init_completion(&req->r_completion);
 	init_completion(&req->r_safe_completion);
-	rb_init_node(&req->r_node);
+	RB_CLEAR_NODE(&req->r_node);
 	INIT_LIST_HEAD(&req->r_unsafe_item);
 	INIT_LIST_HEAD(&req->r_linger_item);
 	INIT_LIST_HEAD(&req->r_linger_osd);