Hi Andrew,

After merging the akpm tree, today's linux-next build (x86_64
allmodconfig) failed like this:

fs/gfs2/rgrp.c: In function 'gfs2_rs_alloc':
fs/gfs2/rgrp.c:456:2: error: implicit declaration of function 'rb_init_node' [-Werror=implicit-function-declaration]

Caused by commit 5599fe1ab023 ("rbtree: empty nodes have no color") from
the akpm tree interacting with commit cde7c325077b ("GFS2: Add structure
to contain rgrp, bitmap, offset tuple") from the gfs2 tree.

I have applied the following merge fix patch (which is probably not
sufficient).

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Mon, 6 Aug 2012 13:35:11 +1000
Subject: [PATCH] rbtree/gfs2: remove call to rb_init_node

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 fs/gfs2/rgrp.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 06476b3..6fb3a57 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -453,8 +453,6 @@ int gfs2_rs_alloc(struct gfs2_inode *ip)
 	if (!res)
 		error = -ENOMEM;
 
-	rb_init_node(&res->rs_node);
-
 	down_write(&ip->i_rw_mutex);
 	if (ip->i_res)
 		kmem_cache_free(gfs2_rsrv_cachep, res);
@@ -486,7 +484,6 @@ static void __rs_deltree(struct gfs2_inode *ip, struct gfs2_blkreserv *rs)
 	rgd = rs->rs_rbm.rgd;
 	trace_gfs2_rs(ip, rs, TRACE_RS_TREEDEL);
 	rb_erase(&rs->rs_node, &rgd->rd_rstree);
-	rb_init_node(&rs->rs_node);
 	BUG_ON(!rgd->rd_rs_cnt);
 	rgd->rd_rs_cnt--;
 
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au