Messages in this thread Patch in this message | | | From | Rongwei Wang <> | Subject | [PATCH v3 1/2] arm64: trans_pgd: unify the use of pmd_populate_kernel | Date | Fri, 26 Nov 2021 01:05:59 +0800 |
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In commit 5de59884ac0e ("arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions"), simply replace init_mm with NULL for pmd_populate_kernel. But in commit 59511cfd08f3 ("arm64: mm: use XN table mapping attributes for user/kernel mappings"), adding the check of mm context in 'pmd_populate_kernel'. And 'pmd_populate_kernel' always called with init_mm under arm64, nice to unify its use.
This patch make a simple change, just restoring init_mm for 'pmd_populate_kernel' in 'copy_pte'.
Suggested-by: Abaci <abaci@linux.alibaba.com> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com> --- arch/arm64/mm/trans_pgd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/mm/trans_pgd.c b/arch/arm64/mm/trans_pgd.c index d7da8ca..5275ca3 100644 --- a/arch/arm64/mm/trans_pgd.c +++ b/arch/arm64/mm/trans_pgd.c @@ -67,7 +67,7 @@ static int copy_pte(struct trans_pgd_info *info, pmd_t *dst_pmdp, dst_ptep = trans_alloc(info); if (!dst_ptep) return -ENOMEM; - pmd_populate_kernel(NULL, dst_pmdp, dst_ptep); + pmd_populate_kernel(&init_mm, dst_pmdp, dst_ptep); dst_ptep = pte_offset_kernel(dst_pmdp, start); src_ptep = pte_offset_kernel(src_pmdp, start); -- 1.8.3.1
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