diff options
| -rw-r--r-- | kernel/dma/Kconfig | 1 | ||||
| -rw-r--r-- | kernel/dma/direct.c | 14 |
2 files changed, 1 insertions, 14 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index a0ce3c1494fd..14ef8e1bdefe 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -71,6 +71,7 @@ config SWIOTLB # in the pagetables # config DMA_NONCOHERENT_MMAP + default y if !MMU bool config DMA_COHERENT_POOL diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 0a4881e59aa7..9ec6a5c3fc57 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -459,7 +459,6 @@ int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt, return ret; } -#ifdef CONFIG_MMU bool dma_direct_can_mmap(struct device *dev) { return dev_is_dma_coherent(dev) || @@ -485,19 +484,6 @@ int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff, user_count << PAGE_SHIFT, vma->vm_page_prot); } -#else /* CONFIG_MMU */ -bool dma_direct_can_mmap(struct device *dev) -{ - return false; -} - -int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size, - unsigned long attrs) -{ - return -ENXIO; -} -#endif /* CONFIG_MMU */ int dma_direct_supported(struct device *dev, u64 mask) { |