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Subject[PATCH 09/10] sh: don't allow non-coherent DMA for NOMMU
Date
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>
---
arch/sh/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 808b638b11f3..b97d9712c252 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -48,6 +48,7 @@ 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
@@ -155,7 +156,7 @@ 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
--
2.25.1
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