Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f10ac8a2 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Ingo Molnar
Browse files

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: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: default avatarMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bee44f29

arch/x86/kernel/pci-calgary_64.c

+2 −0
Original line number Diff line number Diff line
@@ -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)