From 8d2a91f8960b230b8bbcc4d97ed2015f5271c87d Mon Sep 17 00:00:00 2001 From: Divyesh Shah Date: Fri, 16 Apr 2010 08:10:51 +0200 Subject: [PATCH] blkio: Initialize blkg->stats_lock for the root cfqg too This fixes the lockdep warning reported by Gui Jianfeng. Signed-off-by: Divyesh Shah Reviewed-by: Gui Jianfeng Signed-off-by: Jens Axboe --- block/blk-cgroup.c | 7 +------ block/blk-cgroup.h | 2 -- block/cfq-iosched.c | 1 - 3 files changed, 1 insertion(+), 9 deletions(-) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 80c1261a7d3..83930f65016 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -86,12 +86,6 @@ struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup) } EXPORT_SYMBOL_GPL(cgroup_to_blkio_cgroup); -void blkio_group_init(struct blkio_group *blkg) -{ - spin_lock_init(&blkg->stats_lock); -} -EXPORT_SYMBOL_GPL(blkio_group_init); - /* * Add to the appropriate stat variable depending on the request type. * This should be called with the blkg->stats_lock held. @@ -349,6 +343,7 @@ void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, unsigned long flags; spin_lock_irqsave(&blkcg->lock, flags); + spin_lock_init(&blkg->stats_lock); rcu_assign_pointer(blkg->key, key); blkg->blkcg_id = css_id(&blkcg->css); hlist_add_head_rcu(&blkg->blkcg_node, &blkcg->blkg_list); diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index 1d409ad9c6e..2c956a06339 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -217,7 +217,6 @@ extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, extern int blkiocg_del_blkio_group(struct blkio_group *blkg); extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key); -void blkio_group_init(struct blkio_group *blkg); void blkiocg_update_timeslice_used(struct blkio_group *blkg, unsigned long time); void blkiocg_update_dispatch_stats(struct blkio_group *blkg, uint64_t bytes, @@ -235,7 +234,6 @@ struct cgroup; static inline struct blkio_cgroup * cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; } -static inline void blkio_group_init(struct blkio_group *blkg) {} static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, struct blkio_group *blkg, void *key, dev_t dev) {} diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 01771098355..62defd05518 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -961,7 +961,6 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create) for_each_cfqg_st(cfqg, i, j, st) *st = CFQ_RB_ROOT; RB_CLEAR_NODE(&cfqg->rb_node); - blkio_group_init(&cfqg->blkg); /* * Take the initial reference that will be released on destroy