linux-kernel - [PATCH 2/3] mm: memory-failure: avoid pfn_valid() twice in soft_offline

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Date:   Fri, 21 Oct 2022 16:46:10 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Naoya Horiguchi <naoya.horiguchi@....com>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Miaohe Lin <linmiaohe@...wei.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 2/3] mm: memory-failure: avoid pfn_valid() twice in soft_offline_page()

Simplify WARN_ON_ONCE(flags & MF_COUNT_INCREASED) under !pfn_valid().

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 mm/memory-failure.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index b94152abb1c9..ca0199d0f79d 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -2554,10 +2554,10 @@ int soft_offline_page(unsigned long pfn, int flags)
 	bool try_again = true;
 	struct page *page;
 
-	WARN_ON_ONCE(!pfn_valid(pfn) && (flags & MF_COUNT_INCREASED));
-
-	if (!pfn_valid(pfn))
+	if (!pfn_valid(pfn)) {
+		WARN_ON_ONCE(flags & MF_COUNT_INCREASED);
 		return -ENXIO;
+	}
 
 	/* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
 	page = pfn_to_online_page(pfn);
-- 
2.35.3