Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Alex Elder , Sage Weil Subject: [ 059/171] crush: fix tree node weight lookup Date: Wed, 21 Nov 2012 16:40:05 -0800 Message-Id: <20121122004039.289073464@linuxfoundation.org> In-Reply-To: <20121122004033.298367941@linuxfoundation.org> References: <20121122004033.298367941@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sage Weil (cherry picked from commit f671d4cd9b36691ac4ef42cde44c1b7a84e13631) Fix the node weight lookup for tree buckets by using a correct accessor. Reflects ceph.git commit d287ade5bcbdca82a3aef145b92924cf1e856733. Reviewed-by: Alex Elder Signed-off-by: Sage Weil Signed-off-by: Greg Kroah-Hartman --- include/linux/crush/crush.h | 5 +++++ net/ceph/crush/crush.c | 4 +--- 2 files changed, 6 insertions(+), 3 deletions(-) --- a/include/linux/crush/crush.h +++ b/include/linux/crush/crush.h @@ -177,4 +177,9 @@ extern void crush_destroy_bucket_straw(s extern void crush_destroy_bucket(struct crush_bucket *b); extern void crush_destroy(struct crush_map *map); +static inline int crush_calc_tree_node(int i) +{ + return ((i+1) << 1)-1; +} + #endif --- a/net/ceph/crush/crush.c +++ b/net/ceph/crush/crush.c @@ -37,9 +37,7 @@ int crush_get_bucket_item_weight(const s case CRUSH_BUCKET_LIST: return ((struct crush_bucket_list *)b)->item_weights[p]; case CRUSH_BUCKET_TREE: - if (p & 1) - return ((struct crush_bucket_tree *)b)->node_weights[p]; - return 0; + return ((struct crush_bucket_tree *)b)->node_weights[crush_calc_tree_node(p)]; case CRUSH_BUCKET_STRAW: return ((struct crush_bucket_straw *)b)->item_weights[p]; }