From f10ac8a232496bf9271cfc67c6eea432891f04a6 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Thu, 11 Sep 2008 23:08:47 +0900 Subject: [PATCH] x86: avoid unnecessary low zone allocation in Calgary's alloc_coherent x86's common alloc_coherent (dma_alloc_coherent in dma-mapping.h) sets up the gfp flag according to the device dma_mask but Calgary doesn't need it because of virtual mappings. This patch avoids unnecessary low zone allocation. Signed-off-by: FUJITA Tomonori Acked-by: Muli Ben-Yehuda Signed-off-by: Ingo Molnar --- arch/x86/kernel/pci-calgary_64.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c index 8415d92853c..fe7695e4caa 100644 --- a/arch/x86/kernel/pci-calgary_64.c +++ b/arch/x86/kernel/pci-calgary_64.c @@ -491,6 +491,8 @@ static void* calgary_alloc_coherent(struct device *dev, size_t size, npages = size >> PAGE_SHIFT; order = get_order(size); + flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); + /* alloc enough pages (and possibly more) */ ret = (void *)__get_free_pages(flag, order); if (!ret) -- 2.41.1