memblock: add memblock_clear_nomap()

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This function, with a combination of memblock_mark_nomap(), will be used
in a later kdump patch for arm64 when it temporarily isolates some range
of memory from the other memory blocks in order to create a specific
kernel mapping at boot time.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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AKASHI Takahiro 2017-04-03 11:23:54 +09:00 • committed by Catalin Marinas

parent dffb0113d5

commit 4c546b8a34

2 changed files with 13 additions and 0 deletions

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1

include/linux/memblock.h

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12

mm/memblock.c

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