diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-07-08 09:30:00 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-07-19 09:29:23 +0200 |
| commit | 2f9237d4f6df49b74c51cdac555b0a9979d0c237 (patch) | |
| tree | 6a09811a657e87bc6b716443993bceb2775a1b8f /kernel/dma | |
| parent | dma-mapping: inline the fast path dma-direct calls (diff) | |
| download | linux-2f9237d4f6df49b74c51cdac555b0a9979d0c237.tar.xz linux-2f9237d4f6df49b74c51cdac555b0a9979d0c237.zip | |
dma-mapping: make support for dma ops optional
Avoid the overhead of the dma ops support for tiny builds that only
use the direct mapping.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/Kconfig | 4 | ||||
| -rw-r--r-- | kernel/dma/Makefile | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 1da3f44f2565..5cfb2428593a 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -5,6 +5,9 @@ config HAS_DMA depends on !NO_DMA default y +config DMA_OPS + bool + config NEED_SG_DMA_LENGTH bool @@ -60,6 +63,7 @@ config DMA_NONCOHERENT_CACHE_SYNC config DMA_VIRT_OPS bool depends on HAS_DMA + select DMA_OPS config SWIOTLB bool diff --git a/kernel/dma/Makefile b/kernel/dma/Makefile index 370f63344e9c..32c7c1942bbd 100644 --- a/kernel/dma/Makefile +++ b/kernel/dma/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_HAS_DMA) += mapping.o direct.o dummy.o +obj-$(CONFIG_HAS_DMA) += mapping.o direct.o +obj-$(CONFIG_DMA_OPS) += dummy.o obj-$(CONFIG_DMA_CMA) += contiguous.o obj-$(CONFIG_DMA_DECLARE_COHERENT) += coherent.o obj-$(CONFIG_DMA_VIRT_OPS) += virt.o |