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mm: filemap: filemap_fault_recheck_pte_none() use pte_offset_map_ro_nolock()

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In filemap_fault_recheck_pte_none(), we just do pte_none() check, so
convert it to using pte_offset_map_ro_nolock().

Link: https://lkml.kernel.org/r/9f7cbbaa772385ced1b8931b67a8b9d246c9b82d.1727332572.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qi Zheng 2024-09-26 14:46:16 +08:00 committed by Andrew Morton
parent 7aefa59899
commit bd6ad65ddc
1 changed files with 2 additions and 2 deletions
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4
mm/filemap.c
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@ -3258,8 +3258,8 @@ static vm_fault_t filemap_fault_recheck_pte_none(struct vm_fault *vmf)
if (!(vmf->flags & FAULT_FLAG_ORIG_PTE_VALID))
return 0;
ptep = pte_offset_map_nolock(vma->vm_mm, vmf->pmd, vmf->address,
&vmf->ptl);
ptep = pte_offset_map_ro_nolock(vma->vm_mm, vmf->pmd, vmf->address,
&vmf->ptl);
if (unlikely(!ptep))
return VM_FAULT_NOPAGE;