Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3611553ef985ef7c5863c8a94641738addd04cff
Commit: 3611553ef985ef7c5863c8a94641738addd04cff
Parent: 49914084e797530d9baaf51df9eda77babc98fa8
Author: Haavard Skinnemoen <[EMAIL PROTECTED]>
AuthorDate: Thu Jul 5 17:08:09 2007 +0200
Committer: Haavard Skinnemoen <[EMAIL PROTECTED]>
CommitDate: Fri Jan 25 08:31:39 2008 +0100
[AVR32] Drop GFP_COMP for DMA memory allocations
dma_alloc_coherent wants to split pages after allocation in order to
reduce the memory footprint. This does not work well with GFP_COMP
pages, so drop this flag before allocation.
This patch was forward-ported from BSP 2.0
Signed-off-by: Haavard Skinnemoen <[EMAIL PROTECTED]>
---
arch/avr32/mm/dma-coherent.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/avr32/mm/dma-coherent.c b/arch/avr32/mm/dma-coherent.c
index 177fea8..6d8c794 100644
--- a/arch/avr32/mm/dma-coherent.c
+++ b/arch/avr32/mm/dma-coherent.c
@@ -41,6 +41,13 @@ static struct page *__dma_alloc(struct device *dev, size_t
size,
struct page *page, *free, *end;
int order;
+ /* Following is a work-around (a.k.a. hack) to prevent pages
+ * with __GFP_COMP being passed to split_page() which cannot
+ * handle them. The real problem is that this flag probably
+ * should be 0 on AVR32 as it is not supported on this
+ * platform--see CONFIG_HUGETLB_PAGE. */
+ gfp &= ~(__GFP_COMP);
+
size = PAGE_ALIGN(size);
order = get_order(size);
-
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