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Subject[PATCH] hugetlb_cgroup: use helper pages_per_huge_page() in hugetlb_cgroup
Date
We could use helper function pages_per_huge_page() to get the number of
pages in a hstate to simplify the code slightly.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/hugetlb_cgroup.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index 8909e075d441..86b5cc128584 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -113,7 +113,7 @@ static void hugetlb_cgroup_init(struct hugetlb_cgroup *h_cgroup,
rsvd_parent);

limit = round_down(PAGE_COUNTER_MAX,
- 1 << huge_page_order(&hstates[idx]));
+ pages_per_huge_page(&hstates[idx]));

ret = page_counter_set_max(
hugetlb_cgroup_counter_from_cgroup(h_cgroup, idx),
@@ -466,7 +466,7 @@ static int hugetlb_cgroup_read_u64_max(struct seq_file *seq, void *v)
counter = &h_cg->hugepage[idx];

limit = round_down(PAGE_COUNTER_MAX,
- 1 << huge_page_order(&hstates[idx]));
+ pages_per_huge_page(&hstates[idx]));

switch (MEMFILE_ATTR(cft->private)) {
case RES_RSVD_USAGE:
@@ -513,7 +513,7 @@ static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of,
return ret;

idx = MEMFILE_IDX(of_cft(of)->private);
- nr_pages = round_down(nr_pages, 1 << huge_page_order(&hstates[idx]));
+ nr_pages = round_down(nr_pages, pages_per_huge_page(&hstates[idx]));

switch (MEMFILE_ATTR(of_cft(of)->private)) {
case RES_RSVD_LIMIT:
--
2.19.1
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