linux-kernel - [PATCH v4 13/13] ARM: fix type of PHYS_PFN

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Date:	Thu, 31 Jan 2013 16:58:32 -0500
From:	Cyril Chemparathy <cyril@...com>
To:	<linux@....linux.org.uk>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC:	<sboyd@...eaurora.org>, <will.deacon@....com>,
	<paulmck@...ux.vnet.ibm.com>, <nico@...aro.org>,
	<catalin.marinas@....com>, <marc.zyngier@....com>,
	<linus.walleij@...aro.org>, Cyril Chemparathy <cyril@...com>
Subject: [PATCH v4 13/13] ARM: fix type of PHYS_PFN_OFFSET to unsigned long

On LPAE machines, PHYS_OFFSET evaluates to a phys_addr_t and this type is
inherited by the PHYS_PFN_OFFSET definition as well.  Consequently, the kernel
build emits warnings of the form:

init/main.c: In function 'start_kernel':
init/main.c:588:7: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'phys_addr_t' [-Wformat]

This patch fixes this warning by pinning down the PFN type to unsigned long.

Signed-off-by: Cyril Chemparathy <cyril@...com>
---
 arch/arm/include/asm/memory.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index f3a7f76..32e9e5a 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -223,7 +223,7 @@ static inline unsigned long __phys_to_virt(unsigned long x)
  * direct-mapped view.  We assume this is the first page
  * of RAM in the mem_map as well.
  */
-#define PHYS_PFN_OFFSET	(PHYS_OFFSET >> PAGE_SHIFT)
+#define PHYS_PFN_OFFSET	((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
 
 /*
  * These are *only* valid on the kernel direct mapped RAM memory.
-- 
1.7.9.5

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