diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-06-10 10:29:49 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-06-17 09:29:31 +0200 |
| commit | 1fbf57d0530217b9f264eedc4867bf91479cdf3c (patch) | |
| tree | 24d8dfeea45accda549aa7cfba9cbcabe5f9c684 /kernel/dma/Kconfig | |
| parent | dbed452a078d56bc7f1abecc3edd6a75e8e4484e (diff) | |
dma-direct: re-enable mmap for !CONFIG_MMU
nommu configfs can trivially map the coherent allocations to user space,
as no actual page table setup is required and the kernel and the user
space programs share the same address space.
Fixes: 62fcee9a3bd7 ("dma-mapping: remove CONFIG_ARCH_NO_COHERENT_DMA_MMAP")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: dillon min <dillon.minfei@gmail.com>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Tested-by: dillon min <dillon.minfei@gmail.com>
Diffstat (limited to 'kernel/dma/Kconfig')
| -rw-r--r-- | kernel/dma/Kconfig | 1 |
1 files changed, 1 insertions, 0 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 |