linux-kernel - [Patch] i386 bootioremap / kexec fix

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Message-Id: <1158893685.5657.72.camel@keithlap>
Date:	Thu, 21 Sep 2006 19:54:45 -0700
From:	keith mannthey <kmannth@...ibm.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	andrew <akpm@...l.org>, Vivek goyal <vgoyal@...ibm.com>,
	dave hansen <haveblue@...ibm.com>
Subject: [Patch] i386 bootioremap / kexec fix


  With CONFIG_PHYSICAL_START set to a non default values the i386
boot_ioremap code calculated its pte index wrong and users of
boot_ioremap have their areas incorrectly mapped  (for me SRAT table not
mapped during early boot). This patch removes the addr < BOOT_PTE_PTRS
constraint. 

Signed-off-by: Keith Mannthey<kmannth@...ibm.com>
---
 boot_ioremap.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff -urN linux-2.6.18-rc6-mm2-orig/arch/i386/mm/boot_ioremap.c
linux-2.6.17/arch/i386/mm/boot_ioremap.c
--- linux-2.6.18-rc6-mm2-orig/arch/i386/mm/boot_ioremap.c	2006-09-18
01:19:22.000000000 -0700
+++ linux-2.6.17/arch/i386/mm/boot_ioremap.c	2006-09-18
01:23:33.000000000 -0700
@@ -29,8 +29,11 @@
  */
 
 #define BOOT_PTE_PTRS (PTRS_PER_PTE*2)
-#define boot_pte_index(address) \
-	     (((address) >> PAGE_SHIFT) & (BOOT_PTE_PTRS - 1))
+
+static unsigned long boot_pte_index(unsigned long vaddr) 
+{
+	return __pa(vaddr) >> PAGE_SHIFT;
+}
 
 static inline boot_pte_t* boot_vaddr_to_pte(void *address)
 {


-
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