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hugetlb: pass NULL to kobj_to_hstate() if nid is unused

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We can pass NULL to kobj_to_hstate() directly when nid is unused to
simplify the code. No functional change intended.

Link: https://lkml.kernel.org/r/20220901120030.63318-7-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-09-01 20:00:26 +08:00 committed by Andrew Morton
parent bcc665436f
commit 12658abfc5
1 changed files with 2 additions and 4 deletions
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6
mm/hugetlb.c
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@ -3763,8 +3763,7 @@ 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);
@ -3777,7 +3776,6 @@ 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);
@ -3789,7 +3787,7 @@ 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;