linux-kernel - [PATCH v3 03/12] ARC: init: Pass a pointer to virt_to

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Message-Id: <20230503-virt-to-pfn-v6-4-rc1-v3-3-a16c19c03583@linaro.org>
Date:   Tue, 23 May 2023 16:05:27 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Vineet Gupta <vgupta@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Greg Ungerer <gerg@...ux-m68k.org>
Cc:     linux-mm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org,
        linux-snps-arc@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arch@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v3 03/12] ARC: init: Pass a pointer to virt_to_pfn() in
 init

Functions that work on a pointer to virtual memory such as
virt_to_pfn() and users of that function such as
virt_to_page() are supposed to pass a pointer to virtual
memory, ideally a (void *) or other pointer. 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 up the offending call in arch/arc with an explicit cast.

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 arch/arc/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 2b89b6c53801..9f64d729c9f8 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -87,7 +87,7 @@ void __init setup_arch_memory(void)
 	setup_initial_init_mm(_text, _etext, _edata, _end);
 
 	/* first page of system - kernel .vector starts here */
-	min_low_pfn = virt_to_pfn(CONFIG_LINUX_RAM_BASE);
+	min_low_pfn = virt_to_pfn((void *)CONFIG_LINUX_RAM_BASE);
 
 	/* Last usable page of low mem */
 	max_low_pfn = max_pfn = PFN_DOWN(low_mem_start + low_mem_sz);

-- 
2.34.1