Subject: powerpc: Make direct DMA use node local allocations From: Benjamin Herrenschmidt This patch makes dma_alloc_coherent() use node local allocation when using the direct DMA ops. The node is obtained from the new device extension. If no such extension is present, the current node is used. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Arnd Bergmann --- arch/powerpc/kernel/dma_64.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) Index: linux-2.6/arch/powerpc/kernel/dma_64.c =================================================================== --- linux-2.6.orig/arch/powerpc/kernel/dma_64.c +++ linux-2.6/arch/powerpc/kernel/dma_64.c @@ -120,14 +120,18 @@ unsigned long dma_direct_offset; static void *dma_direct_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { + struct page *page; void *ret; + int node = dev->sysdata.numa_node; /* TODO: Maybe use the numa node here too ? */ - ret = (void *)__get_free_pages(flag, get_order(size)); - if (ret != NULL) { - memset(ret, 0, size); - *dma_handle = virt_to_abs(ret) | dma_direct_offset; - } + page = alloc_pages_node(node, flag, get_order(size)); + if (page == NULL) + return NULL; + ret = page_address(page); + memset(ret, 0, size); + *dma_handle = virt_to_abs(ret) | dma_direct_offset; + return ret; }