Re: [PATCH 04/20] arm-nommu: use generic dma_noncoherent_ops

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On 11/05/2018 08:59, Christoph Hellwig wrote:
Switch to the generic noncoherent direct mapping implementation for
the nommu dma map implementation.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 arch/arc/Kconfig                |   1 +
 arch/arm/Kconfig                |   4 +
 arch/arm/mm/dma-mapping-nommu.c | 139 +++++---------------------------
 3 files changed, 23 insertions(+), 121 deletions(-)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 89d47eac18b2..3a492a9aeaad 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -9,6 +9,7 @@
 config ARC
 	def_bool y
 	select ARC_TIMERS
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE

I guess that this arc change is here by accident, no? And isn't ARCH_HAS_SYNC_DMA_FOR_DEVICE already selected (by 3/20)?

 	select ARCH_HAS_SG_CHAIN
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index c43f5bb55ac8..76ddd0064f87 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig




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