linux-kernel - [PATCH v2 06/10] hugetlb: pass NULL to kobj_to

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Message-ID: <20220901120030.63318-7-linmiaohe@huawei.com>
Date:   Thu, 1 Sep 2022 20:00:26 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <mike.kravetz@...cle.com>,
        <songmuchun@...edance.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH v2 06/10] hugetlb: pass NULL to kobj_to_hstate() if nid is unused

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@...wei.com>
Reviewed-by: Muchun Song <songmuchun@...edance.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