Commit 73fbc1eb authored Nov 23, 2016 by Marcin Nowakowski Committed by Ralf Baechle Jan 03, 2017

MIPS: fix mem=X@Y commandline processing



When a memory offset is specified through the commandline, add the
memory in range PHYS_OFFSET:Y as reserved memory area.
Otherwise the bootmem allocator is initialised with low page equal to
min_low_pfn = PHYS_OFFSET, and in free_all_bootmem will process pages
starting from min_low_pfn instead of PFN(Y).

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14613/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 4c9fff36

arch/mips/kernel/setup.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -662,6 +662,10 @@ static int __init early_parse_mem(char *p)
		start = memparse(p + 1, &p);

		add_memory_region(start, size, BOOT_MEM_RAM);

		if (start && start > PHYS_OFFSET)
		add_memory_region(PHYS_OFFSET, start - PHYS_OFFSET,
		BOOT_MEM_RESERVED);
		return 0;
		}
		early_param("mem", early_parse_mem);

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