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authorThomas Gleixner <tglx@linutronix.de>2011-05-14 06:06:36 -0400
committerThomas Gleixner <tglx@linutronix.de>2011-05-14 06:06:36 -0400
commita18f22a968de17b29f2310cdb7ba69163e65ec15 (patch)
treea7d56d88fad5e444d7661484109758a2f436129e /kernel/crash_dump.c
parenta1c57e0fec53defe745e64417eacdbd3618c3e66 (diff)
parent798778b8653f64b7b2162ac70eca10367cff6ce8 (diff)
Merge branch 'consolidate-clksrc-i8253' of master.kernel.org:~rmk/linux-2.6-arm into timers/clocksource
Conflicts: arch/ia64/kernel/cyclone.c arch/mips/kernel/i8253.c arch/x86/kernel/i8253.c Reason: Resolve conflicts so further cleanups do not conflict further Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/crash_dump.c')
-rw-r--r--kernel/crash_dump.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c
new file mode 100644
index 000000000000..5f85690285d4
--- /dev/null
+++ b/kernel/crash_dump.c
@@ -0,0 +1,34 @@
1#include <linux/kernel.h>
2#include <linux/crash_dump.h>
3#include <linux/init.h>
4#include <linux/errno.h>
5#include <linux/module.h>
6
7/*
8 * If we have booted due to a crash, max_pfn will be a very low value. We need
9 * to know the amount of memory that the previous kernel used.
10 */
11unsigned long saved_max_pfn;
12
13/*
14 * stores the physical address of elf header of crash image
15 *
16 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
17 * is_kdump_kernel() to determine if we are booting after a panic. Hence put
18 * it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
19 */
20unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
21
22/*
23 * elfcorehdr= specifies the location of elf core header stored by the crashed
24 * kernel. This option will be passed by kexec loader to the capture kernel.
25 */
26static int __init setup_elfcorehdr(char *arg)
27{
28 char *end;
29 if (!arg)
30 return -EINVAL;
31 elfcorehdr_addr = memparse(arg, &end);
32 return end > arg ? 0 : -EINVAL;
33}
34early_param("elfcorehdr", setup_elfcorehdr);