x86, memblock: Add memblock_x86_free_memory_in_range()

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It will return free memory size in specified range.

We can not use memory_size - reserved_size here, because some reserved area
may not be in the scope of memblock.memory.region.

Use memblock.memory.region subtracting memblock.reserved.region to get free range array.
then count size of all free ranges.

-v2: Ben insist on using _in_range

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Yinghai Lu 2010-08-25 13:39:16 -07:00 • committed by H. Peter Anvin

parent 6bcc8176d0

commit b52c17ce85

2 changed files with 49 additions and 0 deletions

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arch/x86/include/asm/memblock.h

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48

arch/x86/mm/memblock.c

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