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sh: don't allow non-coherent DMA for NOMMU 

The code handling non-coherent DMA depends on being able to remap code
as non-cached.  But that can't be done without an MMU, so using this
option on NOMMU builds is broken.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rich Felker <dalias@libc.org>
This commit is contained in:
Christoph Hellwig 2020-07-14 14:18:55 +02:00 committed by Rich Felker
parent 846f9e1fb9
commit cd57d07b1e
1 changed files with 2 additions and 1 deletions
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arch/sh/Kconfig
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@ -61,6 +61,7 @@ config SUPERH
select MAY_HAVE_SPARSE_IRQ
select MODULES_USE_ELF_RELA
select NEED_SG_DMA_LENGTH
select NO_DMA if !MMU && !DMA_COHERENT
select NO_GENERIC_PCI_IOPORT_MAP if PCI
select OLD_SIGACTION
select OLD_SIGSUSPEND
@ -135,7 +136,7 @@ config DMA_COHERENT
bool
config DMA_NONCOHERENT
def_bool !DMA_COHERENT
def_bool !NO_DMA && !DMA_COHERENT
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
config PGTABLE_LEVELS