linux-kernel - [PATCH v2] mm/hugetlb: Remove unnecessary VM_BUG_ON_PAGE on putback_active

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Date:   Tue, 9 Feb 2021 02:11:51 -0500
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <mike.kravetz@...cle.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH v2] mm/hugetlb: Remove unnecessary VM_BUG_ON_PAGE on putback_active_hugepage()

All callers know they are operating on a hugetlb head page. So this
VM_BUG_ON_PAGE can not catch anything useful.

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

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 06719fdf9fd6..cfa06fd1b8d7 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5577,7 +5577,6 @@ bool isolate_huge_page(struct page *page, struct list_head *list)
 
 void putback_active_hugepage(struct page *page)
 {
-	VM_BUG_ON_PAGE(!PageHead(page), page);
 	spin_lock(&hugetlb_lock);
 	SetHPageMigratable(page);
 	list_move_tail(&page->lru, &(page_hstate(page))->hugepage_activelist);
-- 
2.19.1