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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>
This commit is contained in:
Tejun Heo 2013-08-08 20:11:22 -04:00
parent 6d37b97428
commit 3f79851831
1 changed files with 12 additions and 10 deletions
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22
mm/hugetlb_cgroup.c
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@ -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,