linux-kernel - [PATCH AUTOSEL 5.15 32/43] arm64: vdso: Pass (void *) to virt_to

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Message-Id: <20230525183854.1855431-32-sashal@kernel.org>
Date:   Thu, 25 May 2023 14:38:43 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Will Deacon <will@...nel.org>, Sasha Levin <sashal@...nel.org>,
        catalin.marinas@....com, akpm@...ux-foundation.org,
        peterx@...hat.com, hca@...ux.ibm.com, dave@...olabs.net,
        vbabka@...e.cz, mike.kravetz@...cle.com, willy@...radead.org,
        joey.gouly@....com, jannh@...gle.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.15 32/43] arm64: vdso: Pass (void *) to virt_to_page()

From: Linus Walleij <linus.walleij@...aro.org>

[ Upstream commit b0abde80620f42d1ceb3de5e4c1a49cdd5628229 ]

Like the other calls in this function virt_to_page() expects
a pointer, not an integer.

However since many architectures implement virt_to_pfn() as
a macro, this function becomes polymorphic and accepts both a
(unsigned long) and a (void *).

Fix this up with an explicit cast.

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Link: http://lists.infradead.org/pipermail/linux-arm-kernel/2023-May/832583.html
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/kernel/vdso.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index a61fc4f989b37..55dd15c9745da 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -314,7 +314,7 @@ static int aarch32_alloc_kuser_vdso_page(void)
 
 	memcpy((void *)(vdso_page + 0x1000 - kuser_sz), __kuser_helper_start,
 	       kuser_sz);
-	aarch32_vectors_page = virt_to_page(vdso_page);
+	aarch32_vectors_page = virt_to_page((void *)vdso_page);
 	return 0;
 }
 
-- 
2.39.2