From: Pekka Enberg <penberg@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, Pekka Enberg <penberg@kernel.org>,
Tejun Heo <tj@kernel.org>, Yinghai Lu <yinghai@kernel.org>,
"H. Peter Anvin" <hpa@linux.intel.com>,
David Rientjes <rientjes@google.com>
Subject: [RFC/PATCH 1/7] x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bit
Date: Fri, 28 Oct 2011 17:23:15 +0300 [thread overview]
Message-ID: <1319811801-1725-1-git-send-email-penberg@kernel.org> (raw)
Use MAX_DMA_PFN which represents the 16 MB ISA DMA limit on 32-bit x86 just
like we do on 64-bit.
Cc: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---
arch/x86/mm/init_32.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 29f7c6d..434c97d 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
--
1.7.6.4
next reply other threads:[~2011-10-28 14:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-28 14:23 Pekka Enberg [this message]
2011-10-28 14:23 ` [RFC/PATCH 2/7] x86, mm: Move zone init from paging_init() on 64-bit Pekka Enberg
2011-10-31 22:50 ` David Rientjes
2011-10-28 14:23 ` [RFC/PATCH 3/7] x86, mm: Use max_pfn instead of highend_pfn Pekka Enberg
2011-10-31 22:54 ` David Rientjes
2011-11-01 6:37 ` Pekka Enberg
2011-10-28 14:23 ` [RFC/PATCH 4/7] x86, mm: Wrap ZONE_DMA32 with CONFIG_ZONE_DMA32 Pekka Enberg
2011-10-31 22:52 ` David Rientjes
2011-10-31 23:01 ` Arun Sharma
2011-10-28 14:23 ` [RFC/PATCH 5/7] x86, mm: Use max_low_pfn for ZONE_NORMAL on 64-bit Pekka Enberg
2011-10-31 22:54 ` David Rientjes
2011-10-28 14:23 ` [RFC/PATCH 6/7] x86, mm: Prepare zone_sizes_init() for unification Pekka Enberg
2011-10-31 22:56 ` David Rientjes
2011-11-01 6:32 ` Pekka Enberg
2011-10-28 14:23 ` [RFC/PATCH 7/7] x86, mm: Unify zone_sizes_init() Pekka Enberg
2011-10-28 15:48 ` Tejun Heo
2011-10-31 18:30 ` [RFC/PATCH 1/7] x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bit Yinghai Lu
2011-10-31 22:50 ` David Rientjes
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