linux-kernel - Re: [PATCH v4 15/19] ARM: LPAE: use phys_addr_t instead of unsigned long for physical addresses

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Date:	Sat, 19 Feb 2011 18:26:31 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v4 15/19] ARM: LPAE: use phys_addr_t instead of
	unsigned long for physical addresses

On Mon, Jan 24, 2011 at 05:55:57PM +0000, Catalin Marinas wrote:
> From: Will Deacon <will.deacon@....com>
> 
> The unsigned long datatype is not sufficient for mapping physical addresses
> >= 4GB.
> 
> This patch ensures that the phys_addr_t datatype is used to represent
> physical addresses which may be beyond the range of an unsigned long.
> The virt <-> phys macros are updated accordingly to ensure that virtual
> addresses can remain as they are.
> 
> Signed-off-by: Will Deacon <will.deacon@....com>
> Signed-off-by: Catalin Marinas <catalin.marinas@....com>

This patch needs some more things fixed to prevent warnings:

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index a81355d..6cf76b3 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -809,9 +809,10 @@ static void __init sanity_check_meminfo(void)
 		 */
 		if (__va(bank->start) >= vmalloc_min ||
 		    __va(bank->start) < (void *)PAGE_OFFSET) {
-			printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
+			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
 			       "(vmalloc region overlap).\n",
-			       bank->start, bank->start + bank->size - 1);
+			       (unsigned long long)bank->start,
+			       (unsigned long long)bank->start + bank->size - 1);
 			continue;
 		}
 
@@ -822,10 +823,11 @@ static void __init sanity_check_meminfo(void)
 		if (__va(bank->start + bank->size) > vmalloc_min ||
 		    __va(bank->start + bank->size) < __va(bank->start)) {
 			unsigned long newsize = vmalloc_min - __va(bank->start);
-			printk(KERN_NOTICE "Truncating RAM at %.8lx-%.8lx "
-			       "to -%.8lx (vmalloc region overlap).\n",
-			       bank->start, bank->start + bank->size - 1,
-			       bank->start + newsize - 1);
+			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
+			       "to -%.8llx (vmalloc region overlap).\n",
+			       (unsigned long long)bank->start,
+			       (unsigned long long)bank->start + bank->size - 1,
+			       (unsigned long long)bank->start + newsize - 1);
 			bank->size = newsize;
 		}
 #endif
--
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