kdump: sh: parse elfcorehdr command line argument
A quick cut and paste from other architectures to allow SH to parse the elfcorehdr command line argument which is required for both is_kdump_kernel() and vmcore to function. (the former is as yet unused on SH). Tested compilation only Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -25,6 +25,7 @@
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#include <linux/smp.h>
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#include <linux/err.h>
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#include <linux/debugfs.h>
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#include <linux/crash_dump.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/page.h>
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@ -286,6 +287,25 @@ static void __init setup_memory(void)
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extern void __init setup_memory(void);
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#endif
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/*
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* Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
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* is_kdump_kernel() to determine if we are booting after a panic. Hence
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* ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
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*/
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#ifdef CONFIG_CRASH_DUMP
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/* elfcorehdr= specifies the location of elf core header
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* stored by the crashed kernel.
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*/
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static int __init parse_elfcorehdr(char *arg)
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{
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if (!arg)
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return -EINVAL;
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elfcorehdr_addr = memparse(arg, &arg);
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return 0;
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}
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early_param("elfcorehdr", parse_elfcorehdr);
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#endif
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void __init setup_arch(char **cmdline_p)
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{
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enable_mmu();
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