x86: implement true end_pfn_mapped for 32bit

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Even on 32bit 2MB pages can map more memory than is in the true
max_low_pfn if end_pfn is not highmem and not aligned to 2MB.
Add a end_pfn_map similar to x86-64 that accounts for this
fact. This is important for code that really needs to know about
all mapping aliases.

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: andreas.herrmann3@amd.com
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Andi Kleen 2008-03-12 03:53:27 +01:00 • committed by Ingo Molnar

parent 41bd4eac74

commit 7d1116a92d

3 changed files with 7 additions and 2 deletions

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4

arch/x86/mm/init_32.c

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4

include/asm-x86/page.h

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1

include/asm-x86/page_64.h

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