linux-kernel - [PATCH] Use phys_addr_t type for physical address (arm64)

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Date:	Wed, 1 Oct 2014 22:26:55 +0800
From:	Min-Hua Chen <orca.chen@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] Use phys_addr_t type for physical address (arm64)

Hi,

I found that valid_phys_addr_range does not use
phys_addr_t to describe physical address.
Is it better to change the type from unsigned long to phys_addr_t?

Thanks,
Min-Hua


Signed-off-by: Min-Hua Chen<orca.chen@...il.com>
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index e0ecdcf..f771e8b 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -243,7 +243,7 @@ extern void __iomem *ioremap_cache(phys_addr_t
phys_addr, size_t size);
  * (PHYS_OFFSET and PHYS_MASK taken into account).
  */
 #define ARCH_HAS_VALID_PHYS_ADDR_RANGE
-extern int valid_phys_addr_range(unsigned long addr, size_t size);
+extern int valid_phys_addr_range(phys_addr_t addr, size_t size);
 extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);

 extern int devmem_is_allowed(unsigned long pfn);
diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c
index 8ed6cb1..1d73662 100644
--- a/arch/arm64/mm/mmap.c
+++ b/arch/arm64/mm/mmap.c
@@ -102,7 +102,7 @@ EXPORT_SYMBOL_GPL(arch_pick_mmap_layout);
  * You really shouldn't be using read() or write() on /dev/mem.  This might go
  * away in the future.
  */
-int valid_phys_addr_range(unsigned long addr, size_t size)
+int valid_phys_addr_range(phys_addr_t addr, size_t size)
 {
     if (addr < PHYS_OFFSET)
         return 0;
-- 
1.7.10.4
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