Hi Michel, FYI, kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm head: 429a0cb2da6bd3fc09e42eb45ed15bf2994354a8 commit: 5599fe1ab023aed6c8b15adf4a91c02b74224194 [34/51] rbtree: empty nodes have no color config: i386-randconfig-k627 (attached as .config) All related error/warning messages: 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] cc1: some warnings being treated as errors vim +456 fs/gfs2/rgrp.c 453 if (!res) 454 error = -ENOMEM; 455 > 456 rb_init_node(&res->rs_node); 457 458 down_write(&ip->i_rw_mutex); 459 if (ip->i_res) --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation