From: "Andi Kleen" <ak@suse.de>
To: torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org, discuss@x86-64.org
Subject: [3/3] Use the DMA32 zone for dma_alloc_coherent()/pci_alloc_consistent on x86-64
Date: Sun, 11 Sep 2005 18:59:19 +0200 [thread overview]
Message-ID: <43246267.mailL4Y1GM1RI@suse.de> (raw)
Use the DMA32 zone for dma_alloc_coherent()/pci_alloc_consistent on x86-64
Signed-off-by: Andi Kleen <ak@suse.de>
Index: linux/arch/x86_64/kernel/pci-gart.c
===================================================================
--- linux.orig/arch/x86_64/kernel/pci-gart.c
+++ linux/arch/x86_64/kernel/pci-gart.c
@@ -219,6 +219,8 @@ dma_alloc_coherent(struct device *dev, s
/* Kludge to make it bug-to-bug compatible with i386. i386
uses the normal dma_mask for alloc_coherent. */
dma_mask &= *dev->dma_mask;
+ if (dma_mask <= 0xffffffff)
+ gfp |= GFP_DMA32;
again:
memory = dma_alloc_pages(dev, gfp, get_order(size));
@@ -245,7 +247,7 @@ dma_alloc_coherent(struct device *dev, s
}
if (!(gfp & GFP_DMA)) {
- gfp |= GFP_DMA;
+ gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
goto again;
}
return NULL;
next reply other threads:[~2005-09-11 16:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-11 16:59 Andi Kleen [this message]
2005-09-12 17:41 ` [3/3] Use the DMA32 zone for dma_alloc_coherent()/pci_alloc_consistent on x86-64 Linus Torvalds
2005-09-12 17:59 ` Andi Kleen
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