From: Pekka Enberg Date: Tue, 1 Nov 2011 13:58:16 +0000 (+0200) Subject: x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bit X-Git-Tag: firefly_0821_release~3680^2~3748^2~12 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ff14c1d01576fb839a925a42596582f6c68a1a1a;p=firefly-linux-kernel-4.4.55.git 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 Acked-by: Yinghai Lu Acked-by: David Rientjes Signed-off-by: Pekka Enberg Link: http://lkml.kernel.org/r/1320155902-10424-1-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar --- 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