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dmaengine: remove arch dependency from DMADEVICES

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The dependency is redundant since all drivers set their specific arch
dependencies.  The NET_DMA option is modified to be enabled only on platforms
where it is known to have a positive effect.  HAS_DMA is added as an explicit
dependency for the DMADEVICES menu.

Acked-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2008-06-27 01:21:11 -07:00
parent 1099dc7924
commit 9c402f4e19
1 changed files with 8 additions and 5 deletions
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13
drivers/dma/Kconfig
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@@ -4,13 +4,14 @@
menuconfig DMADEVICES menuconfig DMADEVICES
bool "DMA Engine support" bool "DMA Engine support"
depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX || PPC depends on !HIGHMEM64G && HAS_DMA
depends on !HIGHMEM64G
help help
DMA engines can do asynchronous data transfers without DMA engines can do asynchronous data transfers without
involving the host CPU. Currently, this framework can be involving the host CPU. Currently, this framework can be
used to offload memory copies in the network stack and used to offload memory copies in the network stack and
RAID operations in the MD driver. RAID operations in the MD driver. This menu only presents
DMA Device drivers supported by the configured arch, it may
be empty in some cases.
if DMADEVICES if DMADEVICES
@@ -55,10 +56,12 @@ comment "DMA Clients"
config NET_DMA config NET_DMA
bool "Network: TCP receive copy offload" bool "Network: TCP receive copy offload"
depends on DMA_ENGINE && NET depends on DMA_ENGINE && NET
default (INTEL_IOATDMA || FSL_DMA)
help help
This enables the use of DMA engines in the network stack to This enables the use of DMA engines in the network stack to
offload receive copy-to-user operations, freeing CPU cycles. offload receive copy-to-user operations, freeing CPU cycles.
Since this is the main user of the DMA engine, it should be enabled;
say Y here. Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
say N.
endif endif