From a9520cd6f2ac1fbbf206b915946534c6dddbaae2 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 18 Aug 2015 14:55:14 -0700 Subject: blkcg: make blkcg_policy methods take a pointer to blkcg_policy_data The newly added ->pd_alloc_fn() and ->pd_free_fn() deal with pd (blkg_policy_data) while the older ones use blkg (blkcg_gq). As using blkg doesn't make sense for ->pd_alloc_fn() and after allocation pd can always be mapped to blkg and given that these are policy-specific methods, it makes sense to converge on pd. This patch makes all methods deal with pd instead of blkg. Most conversions are trivial. In blk-cgroup.c, a couple method invocation sites now test whether pd exists instead of policy state for consistency. This shouldn't cause any behavioral differences. Signed-off-by: Tejun Heo Cc: Vivek Goyal Signed-off-by: Jens Axboe --- block/blk-throttle.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'block/blk-throttle.c') diff --git a/block/blk-throttle.c b/block/blk-throttle.c index c3a235b8ec7e..c2c75477a6b2 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -377,9 +377,10 @@ static struct blkg_policy_data *throtl_pd_alloc(gfp_t gfp, int node) return &tg->pd; } -static void throtl_pd_init(struct blkcg_gq *blkg) +static void throtl_pd_init(struct blkg_policy_data *pd) { - struct throtl_grp *tg = blkg_to_tg(blkg); + struct throtl_grp *tg = pd_to_tg(pd); + struct blkcg_gq *blkg = tg_to_blkg(tg); struct throtl_data *td = blkg->q->td; struct throtl_service_queue *sq = &tg->service_queue; @@ -417,13 +418,13 @@ static void tg_update_has_rules(struct throtl_grp *tg) (tg->bps[rw] != -1 || tg->iops[rw] != -1); } -static void throtl_pd_online(struct blkcg_gq *blkg) +static void throtl_pd_online(struct blkg_policy_data *pd) { /* * We don't want new groups to escape the limits of its ancestors. * Update has_rules[] after a new group is brought online. */ - tg_update_has_rules(blkg_to_tg(blkg)); + tg_update_has_rules(pd_to_tg(pd)); } static void throtl_pd_free(struct blkg_policy_data *pd) @@ -435,9 +436,9 @@ static void throtl_pd_free(struct blkg_policy_data *pd) kfree(tg); } -static void throtl_pd_reset_stats(struct blkcg_gq *blkg) +static void throtl_pd_reset_stats(struct blkg_policy_data *pd) { - struct throtl_grp *tg = blkg_to_tg(blkg); + struct throtl_grp *tg = pd_to_tg(pd); int cpu; for_each_possible_cpu(cpu) { -- cgit