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authorTejun Heo <tj@kernel.org>2015-08-19 00:55:14 +0300
committerJens Axboe <axboe@fb.com>2015-08-19 01:49:17 +0300
commita9520cd6f2ac1fbbf206b915946534c6dddbaae2 (patch)
tree906dbb619ff1c078486a2fad514d3427aeec6250 /block/cfq-iosched.c
parentb2ce2643cc705aa9043642d7b6248ccfd8e20629 (diff)
downloadlinux-a9520cd6f2ac1fbbf206b915946534c6dddbaae2.tar.xz
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 <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/cfq-iosched.c')
-rw-r--r--block/cfq-iosched.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4b795c7250ef..95e6b0cbaa84 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1597,18 +1597,18 @@ static struct blkg_policy_data *cfq_pd_alloc(gfp_t gfp, int node)
return &cfqg->pd;
}
-static void cfq_pd_init(struct blkcg_gq *blkg)
+static void cfq_pd_init(struct blkg_policy_data *pd)
{
- struct cfq_group *cfqg = blkg_to_cfqg(blkg);
- struct cfq_group_data *cgd = blkcg_to_cfqgd(blkg->blkcg);
+ struct cfq_group *cfqg = pd_to_cfqg(pd);
+ struct cfq_group_data *cgd = blkcg_to_cfqgd(pd->blkg->blkcg);
cfqg->weight = cgd->weight;
cfqg->leaf_weight = cgd->leaf_weight;
}
-static void cfq_pd_offline(struct blkcg_gq *blkg)
+static void cfq_pd_offline(struct blkg_policy_data *pd)
{
- struct cfq_group *cfqg = blkg_to_cfqg(blkg);
+ struct cfq_group *cfqg = pd_to_cfqg(pd);
int i;
for (i = 0; i < IOPRIO_BE_NR; i++) {
@@ -1661,9 +1661,9 @@ static struct blkg_rwstat cfqg_rwstat_pd_recursive_sum(struct blkg_policy_data *
return a;
}
-static void cfq_pd_reset_stats(struct blkcg_gq *blkg)
+static void cfq_pd_reset_stats(struct blkg_policy_data *pd)
{
- struct cfq_group *cfqg = blkg_to_cfqg(blkg);
+ struct cfq_group *cfqg = pd_to_cfqg(pd);
cfqg_stats_reset(&cfqg->stats);
cfqg_stats_reset(&cfqg->dead_stats);