linux-kernel - [RFC][PATCH v1 01/11] mm: hwpoison: cleanup unused PageHuge() check

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Date:   Fri,  9 Nov 2018 15:47:05 +0900
From:   Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        xishi.qiuxishi@...baba-inc.com,
        Laurent Dufour <ldufour@...ux.vnet.ibm.com>
Subject: [RFC][PATCH v1 01/11] mm: hwpoison: cleanup unused PageHuge() check

memory_failure() forks to memory_failure_hugetlb() for hugetlb pages,
so a PageHuge() check after the fork should not be necessary.

Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
---
 mm/memory-failure.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git v4.19-mmotm-2018-10-30-16-08/mm/memory-failure.c v4.19-mmotm-2018-10-30-16-08_patched/mm/memory-failure.c
index 0cd3de3..9f09bf3 100644
--- v4.19-mmotm-2018-10-30-16-08/mm/memory-failure.c
+++ v4.19-mmotm-2018-10-30-16-08_patched/mm/memory-failure.c
@@ -1357,10 +1357,7 @@ int memory_failure(unsigned long pfn, int flags)
 	 * page_remove_rmap() in try_to_unmap_one(). So to determine page status
 	 * correctly, we save a copy of the page flags at this time.
 	 */
-	if (PageHuge(p))
-		page_flags = hpage->flags;
-	else
-		page_flags = p->flags;
+	page_flags = p->flags;
 
 	/*
 	 * unpoison always clear PG_hwpoison inside page lock
-- 
2.7.0