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authorDavid Daney <david.daney@cavium.com>2017-10-12 12:50:34 -0700
committerJames Hogan <jhogan@kernel.org>2017-11-13 17:40:49 +0000
commite0c5f36b2a638fc3298200c385af7f196d3b5cd4 (patch)
tree392034d773cf75ffed89dd0c72b2c9ac1ce96df9
parenta3f143106596d739e7fbc4b84c96b1475247d876 (diff)
MIPS: Add iomem resource for kernel bss section.
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>
-rw-r--r--arch/mips/kernel/setup.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index fe3939726765..702c678de116 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -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);
}
}