The patch titled
Subject: mm: remove unneeded PageAnon check in restore_exclusive_pte()
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-unneeded-pageanon-check-in-restore_exclusive_pte.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-unneeded-pageanon-check-in-restore_exclusive_pte.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm: remove unneeded PageAnon check in restore_exclusive_pte()
Date: Sat, 16 Jul 2022 16:18:16 +0800
When code reaches here, the page must be !PageAnon. There's no need to
check PageAnon again. Remove it.
Link: https://lkml.kernel.org/r/20220716081816.10752-1-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memory.c~mm-remove-unneeded-pageanon-check-in-restore_exclusive_pte
+++ a/mm/memory.c
@@ -753,7 +753,7 @@ static void restore_exclusive_pte(struct
* Currently device exclusive access only supports anonymous
* memory so the entry shouldn't point to a filebacked page.
*/
- WARN_ON_ONCE(!PageAnon(page));
+ WARN_ON_ONCE(1);
set_pte_at(vma->vm_mm, address, ptep, pte);
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-hugetlb-avoid-corrupting-page-mapping-in-hugetlb_mcopy_atomic_pte.patch
mm-page_alloc-minor-clean-up-for-memmap_init_compound.patch
mm-mmapc-fix-missing-call-to-vm_unacct_memory-in-mmap_region.patch
filemap-minor-cleanup-for-filemap_write_and_wait_range.patch
mm-remove-obsolete-comment-in-do_fault_around.patch
mm-remove-unneeded-pageanon-check-in-restore_exclusive_pte.patch
