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MIPS: Add iomem resource for kernel bss section.

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The kexec/kdump tools need to know where the .bss is so it can be
included in the core dump.  This allows vmcore-dmesg to have access to
the dmesg buffers of the crashed kernel as well as allowing the
debugger to examine variables in the bss section.

Add a request for the bss resource in addition to the already
requested code and data sections.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Steven J. Hill <steven.hill@cavium.com>,
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17485/
Signed-off-by: James Hogan <jhogan@kernel.org>
This commit is contained in:
David Daney 2017-10-12 12:50:34 -07:00 committed by James Hogan
parent a3f1431065
commit e0c5f36b2a
1 changed files with 4 additions and 0 deletions
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4
arch/mips/kernel/setup.c
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@ -80,6 +80,7 @@ EXPORT_SYMBOL(mips_io_port_base);
static struct resource code_resource = { .name = "Kernel code", };
static struct resource data_resource = { .name = "Kernel data", };
static struct resource bss_resource = { .name = "Kernel bss", };
static void *detect_magic __initdata = detect_memory_region;
@ -927,6 +928,8 @@ static void __init resource_init(void)
code_resource.end = __pa_symbol(&_etext) - 1;
data_resource.start = __pa_symbol(&_etext);
data_resource.end = __pa_symbol(&_edata) - 1;
bss_resource.start = __pa_symbol(&__bss_start);
bss_resource.end = __pa_symbol(&__bss_stop) - 1;
for (i = 0; i < boot_mem_map.nr_map; i++) {
struct resource *res;
@ -966,6 +969,7 @@ static void __init resource_init(void)
*/
request_resource(res, &code_resource);
request_resource(res, &data_resource);
request_resource(res, &bss_resource);
request_crashkernel(res);
}
}