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authorVivek Goyal <vgoyal@redhat.com>2008-10-18 23:28:25 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 11:52:39 -0400
commit57cac4d1880527e0baf6c2fda529d2ad1d815aec (patch)
treef619e29f658b393b35d1c434fad6dd1501fe73d4 /arch/ia64/kernel
parent293adee601bcd4cdb5076a9bda187137de17e96e (diff)
kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE
o elfcorehdr_addr is used by not only the code under CONFIG_PROC_VMCORE but also by the code which is not inside CONFIG_PROC_VMCORE. For example, is_kdump_kernel() is used by powerpc code to determine if kernel is booting after a panic then use previous kernel's TCE table. So even if CONFIG_PROC_VMCORE is not set in second kernel, one should be able to correctly determine that we are booting after a panic and setup calgary iommu accordingly. o So remove the assumption that elfcorehdr_addr is under CONFIG_PROC_VMCORE. o Move definition of elfcorehdr_addr to arch dependent crash files. (Unfortunately crash dump does not have an arch independent file otherwise that would have been the best place). o kexec.c is not the right place as one can Have CRASH_DUMP enabled in second kernel without KEXEC being enabled. o I don't see sh setup code parsing the command line for elfcorehdr_addr. I am wondering how does vmcore interface work on sh. Anyway, I am atleast defining elfcoredhr_addr so that compilation is not broken on sh. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Simon Horman <horms@verge.net.au> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64/kernel')
-rw-r--r--arch/ia64/kernel/crash_dump.c4
-rw-r--r--arch/ia64/kernel/setup.c9
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/ia64/kernel/crash_dump.c b/arch/ia64/kernel/crash_dump.c
index da60e90eeeb1..23e91290e41f 100644
--- a/arch/ia64/kernel/crash_dump.c
+++ b/arch/ia64/kernel/crash_dump.c
@@ -8,10 +8,14 @@
8 8
9#include <linux/errno.h> 9#include <linux/errno.h>
10#include <linux/types.h> 10#include <linux/types.h>
11#include <linux/crash_dump.h>
11 12
12#include <asm/page.h> 13#include <asm/page.h>
13#include <asm/uaccess.h> 14#include <asm/uaccess.h>
14 15
16/* Stores the physical address of elf header of crash image. */
17unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
18
15/** 19/**
16 * copy_oldmem_page - copy one page from "oldmem" 20 * copy_oldmem_page - copy one page from "oldmem"
17 * @pfn: page frame number to be copied 21 * @pfn: page frame number to be copied
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index de636b215677..a0286be6c235 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -478,7 +478,12 @@ static __init int setup_nomca(char *s)
478} 478}
479early_param("nomca", setup_nomca); 479early_param("nomca", setup_nomca);
480 480
481#ifdef CONFIG_PROC_VMCORE 481/*
482 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
483 * is_kdump_kernel() to determine if we are booting after a panic. Hence
484 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
485 */
486#ifdef CONFIG_CRASH_DUMP
482/* elfcorehdr= specifies the location of elf core header 487/* elfcorehdr= specifies the location of elf core header
483 * stored by the crashed kernel. 488 * stored by the crashed kernel.
484 */ 489 */
@@ -491,7 +496,9 @@ static int __init parse_elfcorehdr(char *arg)
491 return 0; 496 return 0;
492} 497}
493early_param("elfcorehdr", parse_elfcorehdr); 498early_param("elfcorehdr", parse_elfcorehdr);
499#endif
494 500
501#ifdef CONFIG_PROC_VMCORE
495int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end) 502int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
496{ 503{
497 unsigned long length; 504 unsigned long length;