linux-kernel - [PATCH 3/4] mm: mremap: use flush_pud_tlb_range in move_normal

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Message-ID: <20230731074829.79309-4-wangkefeng.wang@huawei.com>
Date:   Mon, 31 Jul 2023 15:48:28 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Mina Almasry <almasrymina@...gle.com>, <kirill@...temov.name>,
        <joel@...lfernandes.org>, <william.kucharski@...cle.com>,
        <kaleshsingh@...gle.com>, <linux-mm@...ck.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 3/4] mm: mremap: use flush_pud_tlb_range in move_normal_pud()

Archs may need to do special things when flushing thp tlb,
so use the more applicable flush_pud_tlb_range() instead of
flush_tlb_range().

Fixes: c49dd3401802 ("mm: speedup mremap on 1GB or larger regions")
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 mm/mremap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mremap.c b/mm/mremap.c
index 1883205fa22b..25114e56901f 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -333,7 +333,7 @@ static bool move_normal_pud(struct vm_area_struct *vma, unsigned long old_addr,
 	VM_BUG_ON(!pud_none(*new_pud));
 
 	pud_populate(mm, new_pud, pud_pgtable(pud));
-	flush_tlb_range(vma, old_addr, old_addr + PUD_SIZE);
+	flush_pud_tlb_range(vma, old_addr, old_addr + PUD_SIZE);
 	if (new_ptl != old_ptl)
 		spin_unlock(new_ptl);
 	spin_unlock(old_ptl);
-- 
2.41.0