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| author | Tejun Heo <tj@kernel.org> | 2013-08-09 04:11:22 +0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-08-09 04:11:22 +0400 |
| commit | 3f79851831a135c5cebbcaa8cddb07d02870b069 (patch) | |
| tree | afe7ebf14a4ffecc5bb053d6c0c1474155b598e1 | |
| parent | 6d37b97428d20a21ffc39ba90e97e91e2a79a986 (diff) | |
| download | linux-3f79851831a135c5cebbcaa8cddb07d02870b069.tar.xz | |
hugetlb_cgroup: pass around @hugetlb_cgroup instead of @cgroup
cgroup controller API will be converted to primarily use struct
cgroup_subsys_state instead of struct cgroup. In preparation, make
hugetlb_cgroup functions pass around struct hugetlb_cgroup instead of
struct cgroup.
This patch shouldn't cause any behavior differences.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
| -rw-r--r-- | mm/hugetlb_cgroup.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index 50f213fc52c7..d2f9fc0b186e 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -56,17 +56,19 @@ static inline bool hugetlb_cgroup_is_root(struct hugetlb_cgroup *h_cg) return (h_cg == root_h_cgroup); } -static inline struct hugetlb_cgroup *parent_hugetlb_cgroup(struct cgroup *cg) +static inline struct hugetlb_cgroup * +parent_hugetlb_cgroup(struct hugetlb_cgroup *h_cg) { - if (!cg->parent) + struct cgroup *parent = h_cg->css.cgroup->parent; + + if (!parent) return NULL; - return hugetlb_cgroup_from_cgroup(cg->parent); + return hugetlb_cgroup_from_cgroup(parent); } -static inline bool hugetlb_cgroup_have_usage(struct cgroup *cg) +static inline bool hugetlb_cgroup_have_usage(struct hugetlb_cgroup *h_cg) { int idx; - struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cg); for (idx = 0; idx < hugetlb_max_hstate; idx++) { if ((res_counter_read_u64(&h_cg->hugepage[idx], RES_USAGE)) > 0) @@ -115,15 +117,14 @@ static void hugetlb_cgroup_css_free(struct cgroup *cgroup) * page reference and test for page active here. This function * cannot fail. */ -static void hugetlb_cgroup_move_parent(int idx, struct cgroup *cgroup, +static void hugetlb_cgroup_move_parent(int idx, struct hugetlb_cgroup *h_cg, struct page *page) { int csize; struct res_counter *counter; struct res_counter *fail_res; struct hugetlb_cgroup *page_hcg; - struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cgroup); - struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(cgroup); + struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(h_cg); page_hcg = hugetlb_cgroup_from_page(page); /* @@ -155,6 +156,7 @@ out: */ static void hugetlb_cgroup_css_offline(struct cgroup *cgroup) { + struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cgroup); struct hstate *h; struct page *page; int idx = 0; @@ -163,13 +165,13 @@ static void hugetlb_cgroup_css_offline(struct cgroup *cgroup) for_each_hstate(h) { spin_lock(&hugetlb_lock); list_for_each_entry(page, &h->hugepage_activelist, lru) - hugetlb_cgroup_move_parent(idx, cgroup, page); + hugetlb_cgroup_move_parent(idx, h_cg, page); spin_unlock(&hugetlb_lock); idx++; } cond_resched(); - } while (hugetlb_cgroup_have_usage(cgroup)); + } while (hugetlb_cgroup_have_usage(h_cg)); } int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |