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Subject[PATCH v2 06/10] hugetlb: pass NULL to kobj_to_hstate() if nid is unused
Date
We can pass NULL to kobj_to_hstate() directly when nid is unused to
simplify the code. No functional change intended.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
---
mm/hugetlb.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d35381de90c3..bb65b7fdca25 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3779,8 +3779,7 @@ HSTATE_ATTR_WO(demote);
static ssize_t demote_size_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
- int nid;
- struct hstate *h = kobj_to_hstate(kobj, &nid);
+ struct hstate *h = kobj_to_hstate(kobj, NULL);
unsigned long demote_size = (PAGE_SIZE << h->demote_order) / SZ_1K;

return sysfs_emit(buf, "%lukB\n", demote_size);
@@ -3793,7 +3792,6 @@ static ssize_t demote_size_store(struct kobject *kobj,
struct hstate *h, *demote_hstate;
unsigned long demote_size;
unsigned int demote_order;
- int nid;

demote_size = (unsigned long)memparse(buf, NULL);

@@ -3805,7 +3803,7 @@ static ssize_t demote_size_store(struct kobject *kobj,
return -EINVAL;

/* demote order must be smaller than hstate order */
- h = kobj_to_hstate(kobj, &nid);
+ h = kobj_to_hstate(kobj, NULL);
if (demote_order >= h->order)
return -EINVAL;

--
2.23.0
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