diff mbox series

[RFC,11/12] arm64: efi: use set_pte_at() not set_pte() in order to pass mm pointer

Message ID 20220126173011.3476262-12-ardb@kernel.org (mailing list archive)
State RFC
Headers show
Series arm64: implement read-only page tables | expand

Commit Message

Ard Biesheuvel Jan. 26, 2022, 5:30 p.m. UTC 
The set_pte() helper does not carry the struct mm pointer, which makes
it difficult for the implementation to reason about the context in which
the set_pte() call is taking place. So switch to set_pte_at() instead.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/arm64/kernel/efi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index e1be6c429810..e3e50adfae18 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -92,7 +92,7 @@  static int __init set_permissions(pte_t *ptep, unsigned long addr, void *data)
 		pte = set_pte_bit(pte, __pgprot(PTE_RDONLY));
 	if (md->attribute & EFI_MEMORY_XP)
 		pte = set_pte_bit(pte, __pgprot(PTE_PXN));
-	set_pte(ptep, pte);
+	set_pte_at(&efi_mm, addr, ptep, pte);
 	return 0;
 }