linux-kernel - [PATCH v4 03/13] ARM: LPAE: use phys_addr_t in free

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Message-ID: <1359669512-31276-4-git-send-email-cyril@ti.com>
Date:	Thu, 31 Jan 2013 16:58:22 -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>, Vitaly Andrianov <vitalya@...com>,
	Cyril Chemparathy <cyril@...com>
Subject: [PATCH v4 03/13] ARM: LPAE: use phys_addr_t in free_memmap()

From: Vitaly Andrianov <vitalya@...com>

The free_memmap() was mistakenly using unsigned long type to represent
physical addresses.  This breaks on PAE systems where memory could be placed
above the 32-bit addressible limit.

This patch fixes this function to properly use phys_addr_t instead.

Signed-off-by: Vitaly Andrianov <vitalya@...com>
Signed-off-by: Cyril Chemparathy <cyril@...com>
Acked-by: Nicolas Pitre <nico@...aro.org>
---
 arch/arm/mm/init.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index ad722f1..1c5151a 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -457,7 +457,7 @@ static inline void
 free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 {
 	struct page *start_pg, *end_pg;
-	unsigned long pg, pgend;
+	phys_addr_t pg, pgend;
 
 	/*
 	 * Convert start_pfn/end_pfn to a struct page pointer.
@@ -469,8 +469,8 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 	 * Convert to physical addresses, and
 	 * round start upwards and end downwards.
 	 */
-	pg = (unsigned long)PAGE_ALIGN(__pa(start_pg));
-	pgend = (unsigned long)__pa(end_pg) & PAGE_MASK;
+	pg = PAGE_ALIGN(__pa(start_pg));
+	pgend = __pa(end_pg) & PAGE_MASK;
 
 	/*
 	 * If there are free pages between these,
-- 
1.7.9.5

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