diff mbox series

[v2,3/5] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT

Message ID 20230223113644.23356-4-jiaxun.yang@flygoat.com (mailing list archive)
State Handled Elsewhere
Headers show
Series Use dma_default_coherent for devicetree default coherency | expand

Commit Message

Jiaxun Yang Feb. 23, 2023, 11:36 a.m. UTC
Provide a kconfig option to allow arches to manipulate default
value of dma_default_coherent in Kconfig.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 kernel/dma/Kconfig   | 3 +++
 kernel/dma/mapping.c | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

Comments

Christoph Hellwig March 1, 2023, 1:03 p.m. UTC | #1
> +config ARCH_DMA_DEFAULT_COHERENT
> +	bool

Please add a comment here explaining when an architecture should
Ń•elect this symbol.
diff mbox series

Patch

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 56866aaa2ae1..968108fdf9bf 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -76,6 +76,9 @@  config ARCH_HAS_DMA_PREP_COHERENT
 config ARCH_HAS_FORCE_DMA_UNENCRYPTED
 	bool
 
+config ARCH_DMA_DEFAULT_COHERENT
+	bool
+
 config SWIOTLB
 	bool
 	select NEED_DMA_MAP_STATE
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 80f9663ffe26..9a4db5cce600 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -20,7 +20,7 @@ 
 #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
 	defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
 	defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
-bool dma_default_coherent;
+bool dma_default_coherent = IS_ENABLED(CONFIG_ARCH_DMA_DEFAULT_COHERENT);
 #endif
 
 /*