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x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bit

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Use MAX_DMA_PFN which represents the 16 MB ISA DMA limit on
32-bit x86 just like we do on 64-bit.

Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Link: http://lkml.kernel.org/r/1320155902-10424-1-git-send-email-penberg@kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Pekka Enberg 2011-11-01 15:58:16 +02:00 committed by Ingo Molnar
parent 5e442a493f
commit ff14c1d015
1 changed files with 1 additions and 2 deletions
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3
arch/x86/mm/init_32.c
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@ -679,8 +679,7 @@ static void __init zone_sizes_init(void)
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] =
virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_HIGHMEM