Commit bd6ad65d authored by Qi Zheng's avatar Qi Zheng Committed by Andrew Morton
Browse files

mm: filemap: filemap_fault_recheck_pte_none() use pte_offset_map_ro_nolock() 

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: default avatarQi Zheng <zhengqi.arch@bytedance.com>
Acked-by: default avatarDavid Hildenbrand <david@redhat.com>
Reviewed-by: default avatarMuchun 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 7aefa598

mm/filemap.c

+2 −2
Original line number Diff line number Diff line
@@ -3258,7 +3258,7 @@ 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,

	ptep = pte_offset_map_ro_nolock(vma->vm_mm, vmf->pmd, vmf->address,

					&vmf->ptl);

	if (unlikely(!ptep))

		return VM_FAULT_NOPAGE;