Commit 117090b5 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
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[PATCH] x86-64: Micro optimization to dma_alloc_coherent node lookup 



Use pcibus_to_node directly

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1d3fbbf9

arch/x86_64/kernel/pci-gart.c

+3 −5
Original line number Diff line number Diff line
@@ -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;