[PATCH 3/5] ia64: Define elfcorehdr_addr in arch dependent section

Vivek Goyal
2008-07-28T21:13:14Z

o Move elfcorehdr_addr definition in arch dependent crash dump file. This is
equivalent to defining elfcorehdr_addr under CONFIG_CRASH_DUMP instead of
CONFIG_PROC_VMCORE. This is needed by is_kdump_kernel() which can be
used irrespective of the fact whether CONFIG_PROC_VMCORE is enabled or
not.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---

arch/ia64/kernel/setup.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff -puN arch/ia64/kernel/setup.c~fix-elfcorehdr_addr-parsing-ia64 arch/ia64/kernel/setup.c
--- linux-2.6.27-pre-rc1/arch/ia64/kernel/setup.c~fix-elfcorehdr_addr-parsing-ia64 2008-07-28 12:16:40.000000000 -0400
+++ linux-2.6.27-pre-rc1-root/arch/ia64/kernel/setup.c 2008-07-28 12:16:40.000000000 -0400
@@ -478,7 +478,12 @@ static __init int setup_nomca(char *s)
}
early_param("nomca", setup_nomca);

-#ifdef CONFIG_PROC_VMCORE
+/*
+ * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
+ * is_kdump_kernel() to determine if we are booting after a panic. Hence
+ * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
+ */
+#ifdef CONFIG_CRASH_DUMP
/* elfcorehdr= specifies the location of elf core header
* stored by the crashed kernel.
*/
@@ -491,7 +496,9 @@ static int __init parse_elfcorehdr(char
return 0;
}
early_param("elfcorehdr", parse_elfcorehdr);
+#endif

+#ifdef CONFIG_PROC_VMCORE
int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
{
unsigned long length;
_