diff options
| author | Qi Zheng <zhengqi.arch@bytedance.com> | 2023-08-10 12:32:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-13 10:42:34 +0300 |
| commit | 4a8fadcf37485e17d5a51a0f8c06e1c644d3ea05 (patch) | |
| tree | 4fe8540da9d46bd184b8b79805ae21ab758e1eeb /arch | |
| parent | a33ae132eec218fa6588e932ec48209b4c410680 (diff) | |
| download | linux-4a8fadcf37485e17d5a51a0f8c06e1c644d3ea05.tar.xz | |
arm64: mm: use ptep_clear() instead of pte_clear() in clear_flush()
[ Upstream commit 00de2c9f26b15f1a6f2af516dd8ec5f8d28189b7 ]
In clear_flush(), the original pte may be a present entry, so we should
use ptep_clear() to let page_table_check track the pte clearing operation,
otherwise it may cause false positive in subsequent set_pte_at().
Link: https://lkml.kernel.org/r/20230810093241.1181142-1-qi.zheng@linux.dev
Fixes: 42b2547137f5 ("arm64/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK")
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/mm/hugetlbpage.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 35e9a468d13e..134dcf6bc650 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -236,7 +236,7 @@ static void clear_flush(struct mm_struct *mm, unsigned long i, saddr = addr; for (i = 0; i < ncontig; i++, addr += pgsize, ptep++) - pte_clear(mm, addr, ptep); + ptep_clear(mm, addr, ptep); flush_tlb_range(&vma, saddr, addr); } |