Hi Michel,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg.git kmemcg-stack
head:   5ef649339ef370c1858f5471fd8b38a7a82c3b60
commit: 96f53054cb1d0d4a9a48ec9ce5e43b1ff911ed85 [83/221] rbtree: empty nodes have no color
config: x86_64-randconfig-s044 (attached as .config)

All error/warnings:

net/ceph/osd_client.c: In function 'ceph_osdc_alloc_request':
net/ceph/osd_client.c:216:2: error: implicit declaration of function 'rb_init_node' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

vim +216 net/ceph/osd_client.c

f24e9980 fs/ceph/osd_client.c  (Sage Weil    2009-10-06  210) 	req->r_osdc = osdc;
f24e9980 fs/ceph/osd_client.c  (Sage Weil    2009-10-06  211) 	req->r_mempool = use_mempool;
68b4476b fs/ceph/osd_client.c  (Yehuda Sadeh 2010-04-06  212) 
415e49a9 fs/ceph/osd_client.c  (Sage Weil    2009-12-07  213) 	kref_init(&req->r_kref);
f24e9980 fs/ceph/osd_client.c  (Sage Weil    2009-10-06  214) 	init_completion(&req->r_completion);
f24e9980 fs/ceph/osd_client.c  (Sage Weil    2009-10-06  215) 	init_completion(&req->r_safe_completion);
cd43045c net/ceph/osd_client.c (Sage Weil    2012-07-09 @216) 	rb_init_node(&req->r_node);
f24e9980 fs/ceph/osd_client.c  (Sage Weil    2009-10-06  217) 	INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 net/ceph/osd_client.c (Yehuda Sadeh 2011-03-21  218) 	INIT_LIST_HEAD(&req->r_linger_item);
a40c4f10 net/ceph/osd_client.c (Yehuda Sadeh 2011-03-21  219) 	INIT_LIST_HEAD(&req->r_linger_osd);

---
0-DAY kernel build testing backend         Open Source Technology Center
Fengguang Wu, Yuanhan Liu                              Intel Corporation