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authorPekka Enberg <penberg@kernel.org>2011-11-01 15:58:16 +0200
committerIngo Molnar <mingo@elte.hu>2011-11-11 10:22:41 +0100
commitff14c1d01576fb839a925a42596582f6c68a1a1a (patch)
treeaaeb66880b5da8a7bb358f8d7b419ba284fe6317 /arch/x86/mm/init_32.c
parent5e442a493fc59fa536c76db1fff5b49ca36a88c5 (diff)
downloadlinux-ff14c1d01576fb839a925a42596582f6c68a1a1a.tar.bz2
x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bit
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>
Diffstat (limited to 'arch/x86/mm/init_32.c')
-rw-r--r--arch/x86/mm/init_32.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 29f7c6d98179..434c97d620c2 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -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