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[PATCH] x86-64: Micro optimization to dma_alloc_coherent node lookup 

Use pcibus_to_node directly

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2005-09-12 18:49:24 +02:00 committed by Linus Torvalds
parent 1d3fbbf9fe
commit 117090b5e8
1 changed files with 3 additions and 5 deletions
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8
arch/x86_64/kernel/pci-gart.c
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@ -191,11 +191,9 @@ static void *dma_alloc_pages(struct device *dev, unsigned gfp, unsigned order)
{
struct page *page;
int node;
if (dev->bus == &pci_bus_type) {
cpumask_t mask;
mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
node = cpu_to_node(first_cpu(mask));
} else
if (dev->bus == &pci_bus_type)
node = pcibus_to_node(to_pci_dev(dev)->bus);
else
node = numa_node_id();
page = alloc_pages_node(node, gfp, order);
return page ? page_address(page) : NULL;