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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-09-11 23:08:47 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-14 16:43:58 +0200 |
| commit | f10ac8a232496bf9271cfc67c6eea432891f04a6 (patch) | |
| tree | 54da320913c87df4e634013b841b9063b5082511 | |
| parent | bee44f294efd8417f5e68553778a6cc957af1547 (diff) | |
| download | linux-f10ac8a232496bf9271cfc67c6eea432891f04a6.tar.gz linux-f10ac8a232496bf9271cfc67c6eea432891f04a6.tar.bz2 linux-f10ac8a232496bf9271cfc67c6eea432891f04a6.zip | |
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 <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/pci-calgary_64.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c index 8415d92853c4..fe7695e4caae 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) |