From 53cbcbcf4362ef39e0a692b1d23c395999397fca Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Thu, 17 Nov 2011 13:11:21 +0100 Subject: ARM: 7166/1: Use PMD_SHIFT instead of PGDIR_SHIFT in dma-consistent.c Commit 99d1717d (ARM: Add init_consistent_dma_size()) introduces dynamic allocation of the consistent_pte array. The number of PTEs should be calculated based on the number of PMD entries rather than PGD, hence the PMD_SHIFT. Signed-off-by: Catalin Marinas Cc: Jon Medhurst Acked-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/mm/dma-mapping.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/mm/dma-mapping.c') diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index e4e7f6cba1ab..ab584569930e 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -168,7 +168,7 @@ static int __init consistent_init(void) pte_t *pte; int i = 0; unsigned long base = consistent_base; - unsigned long num_ptes = (CONSISTENT_END - base) >> PGDIR_SHIFT; + unsigned long num_ptes = (CONSISTENT_END - base) >> PMD_SHIFT; consistent_pte = kmalloc(num_ptes * sizeof(pte_t), GFP_KERNEL); if (!consistent_pte) { -- cgit v1.2.3 From ea2e7057c0234cfb8b09467d8f137760d371fc72 Mon Sep 17 00:00:00 2001 From: Sumit Bhattacharya Date: Thu, 24 Nov 2011 00:47:12 +0100 Subject: ARM: 7172/1: dma: 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 is ported from arch/avr32 (commit 3611553ef985ef7c5863c8a94641738addd04cff). [swarren: s/HUGETLB_PAGE/HUGETLBFS/ in comment, minor comment cleanup] Signed-off-by: Sumit Bhattacharya Tested-by: Varun Colbert Signed-off-by: Stephen Warren Signed-off-by: Russell King --- arch/arm/mm/dma-mapping.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/arm/mm/dma-mapping.c') diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index ab584569930e..1aa664a1999f 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -332,6 +332,15 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, struct page *page; void *addr; + /* + * 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 ARM as it is not supported on this + * platform; see CONFIG_HUGETLBFS. + */ + gfp &= ~(__GFP_COMP); + *handle = ~0; size = PAGE_ALIGN(size); -- cgit v1.2.3