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

    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;
    _

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