Re: [PATCH v2 04/14] mm: filemap: filemap_fault_recheck_pte_none() use pte_offset_map_ro_nolock()

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To: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Subject: Re: [PATCH v2 04/14] mm: filemap: filemap_fault_recheck_pte_none() use pte_offset_map_ro_nolock()
From: Muchun Song <muchun.song@xxxxxxxxx>
Date: Thu, 29 Aug 2024 15:23:32 +0800
Cc: David Hildenbrand <david@xxxxxxxxxx>, Hugh Dickins <hughd@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, "Vlastimil Babka (SUSE)" <vbabka@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, Vishal Moola <vishal.moola@xxxxxxxxx>, Peter Xu <peterx@xxxxxxxxxx>, Ryan Roberts <ryan.roberts@xxxxxxx>, christophe.leroy2@xxxxxxxxxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Linux Memory Management List <linux-mm@xxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx
In-reply-to: <d5d4744c87c759a53b5e115a0d59326232696f61.1724310149.git.zhengqi.arch@bytedance.com>
References: <cover.1724310149.git.zhengqi.arch@bytedance.com> <d5d4744c87c759a53b5e115a0d59326232696f61.1724310149.git.zhengqi.arch@bytedance.com>


> On Aug 22, 2024, at 15:13, Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> wrote:
> 
> In filemap_fault_recheck_pte_none(), we just do pte_none() check, so
> convert it to using pte_offset_map_ro_nolock().
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>

Reviewed-by: Muchun Song <muchun.song@xxxxxxxxx>

References:
- [PATCH v2 00/14] introduce pte_offset_map_{ro|rw}_nolock()
  - From: Qi Zheng
- [PATCH v2 04/14] mm: filemap: filemap_fault_recheck_pte_none() use pte_offset_map_ro_nolock()
  - From: Qi Zheng

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