sh: kexec: Register crashk_res (41309b7a) · Commits · 戴 / test

Register crashk_res so that it can be used by kexec-tools via /proc/iomem. The crash kernel resource needs to be requested the same as the other kernel resources due to the fact that it's handled during the common path for adding new memory ranges, so it's added in to __add_active_range() with the others. This ensures that the crash kernel is properly reserved regardless of which memory range it's placed in. Signed-off-by:

Simon Horman <horms@verge.net.au> Signed-off-by:

Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/setup.c

+6 −3

Original line number	Diff line number	Diff line
		@@ -211,13 +211,16 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
		}

		/*
		* We don't know which RAM region contains kernel data,
		* so we try it repeatedly and let the resource manager
		* test it.
		* We don't know which RAM region contains kernel data or
		* the reserved crashkernel region, so try it repeatedly
		* and let the resource manager test it.
		*/
		request_resource(res, &code_resource);
		request_resource(res, &data_resource);
		request_resource(res, &bss_resource);
		#ifdef CONFIG_KEXEC
		request_resource(res, &crashk_res);
		#endif

		/*
		* Also make sure that there is a PMB mapping that covers this

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