linux-kernel - [PATCH 1/1] mm/page_alloc: merge two get_pfnblock

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 for Android: free password hash cracker in your pocket

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

Message-Id: <20221123134043.33896-1-wonder_rock@126.com>
Date:   Wed, 23 Nov 2022 21:40:43 +0800
From:   wonder_rock@....com
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Deyan Wang <wonder_rock@....com>
Subject: [PATCH 1/1] mm/page_alloc: merge two get_pfnblock_migratetype() into one

From: Deyan Wang <wonder_rock@....com>

It is safe to get_pfnblock_migratetype() in critical section,
so just call get_pfnblock_migratetype() once.

Signed-off-by: Deyan Wang <wonder_rock@....com>
---
 mm/page_alloc.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6652df1f5cc8..c7ba9d65d1c0 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1704,13 +1704,8 @@ static void __free_pages_ok(struct page *page, unsigned int order,
 	if (!free_pages_prepare(page, order, true, fpi_flags))
 		return;
 
-	migratetype = get_pfnblock_migratetype(page, pfn);
-
 	spin_lock_irqsave(&zone->lock, flags);
-	if (unlikely(has_isolate_pageblock(zone) ||
-		is_migrate_isolate(migratetype))) {
-		migratetype = get_pfnblock_migratetype(page, pfn);
-	}
+	migratetype = get_pfnblock_migratetype(page, pfn);
 	__free_one_page(page, pfn, zone, order, migratetype, fpi_flags);
 	spin_unlock_irqrestore(&zone->lock, flags);
 
-- 
2.25.1