linux-kernel - [RFC v2][PATCH 31/35] mn10300: use pte_offset_kernel() as base for pte_offset

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Message-Id: <20090520182534.5FF7F8D3@kernel>
Date:	Wed, 20 May 2009 11:25:34 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	linux-arch@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Dave Hansen <dave@...ux.vnet.ibm.com>
Subject: [RFC v2][PATCH 31/35] mn10300: use pte_offset_kernel() as base for pte_offset_map*()


Some architectures use pte_offset_map() as a basis for
pte_offset_kernel().  Others do the inverse.

Although arbitrary, Using pte_offset_kernel() as the base
seems a wee bit more popular and it also fits in well
with the way I'm breaking out the headers.

Instead of coding the same implementation twice, this
makes pte_offset_map{,_nested}() call pte_offset_kernel()
directly.

Signed-off-by: Dave Hansen <dave@...ux.vnet.ibm.com>
---

 linux-2.6.git-dave/arch/mn10300/include/asm/ptemap.h |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff -puN arch/mn10300/include/asm/ptemap.h~mn10300-pte_offset_kernel arch/mn10300/include/asm/ptemap.h
--- linux-2.6.git/arch/mn10300/include/asm/ptemap.h~mn10300-pte_offset_kernel	2009-04-30 15:11:11.000000000 -0700
+++ linux-2.6.git-dave/arch/mn10300/include/asm/ptemap.h	2009-04-30 15:11:11.000000000 -0700
@@ -1,9 +1,8 @@
 #ifndef _MN10300_ASM_PTEMAP_H
 #define _MN10300_ASM_PTEMAP_H
 
-#define pte_offset_map(dir, address) \
-	((pte_t *) page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
+#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
+#define pte_offset_map_nested(dir, address) pte_offset_kernel(dir, address)
 #define pte_unmap(pte)		do {} while (0)
 #define pte_unmap_nested(pte)	do {} while (0)
 
_
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