linux-kernel - [PATCH 7/9] mm/z3fold: remove redundant list_del_init of zhdr->buddy in z3fold

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220219092533.12596-8-linmiaohe@huawei.com>
Date:   Sat, 19 Feb 2022 17:25:31 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <vitaly.wool@...sulko.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH 7/9] mm/z3fold: remove redundant list_del_init of zhdr->buddy in z3fold_free

The do_compact_page will do list_del_init(&zhdr->buddy) for us. Remove this
extra one to save some possible cpu cycles.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/z3fold.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 18a697f6fe32..867c590df027 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1244,9 +1244,6 @@ static void z3fold_free(struct z3fold_pool *pool, unsigned long handle)
 		return;
 	}
 	if (zhdr->cpu < 0 || !cpu_online(zhdr->cpu)) {
-		spin_lock(&pool->lock);
-		list_del_init(&zhdr->buddy);
-		spin_unlock(&pool->lock);
 		zhdr->cpu = -1;
 		kref_get(&zhdr->refcount);
 		clear_bit(PAGE_CLAIMED, &page->private);
-- 
2.23.0