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| author | Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> | 2023-09-01 11:51:11 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-09-08 11:25:26 -0700 |
| commit | e7ddd00eb3752b109e24eee19cb6b7421059d4db (patch) | |
| tree | f712410e27e6325a5c6f116df0c18d6dd71eeff8 /arch | |
| parent | 77eea559bae925e3cd3c5193efcd37675ec227df (diff) | |
| download | lwn-e7ddd00eb3752b109e24eee19cb6b7421059d4db.tar.gz lwn-e7ddd00eb3752b109e24eee19cb6b7421059d4db.zip | |
riscv: Kconfig: Select DMA_DIRECT_REMAP only if MMU is enabled
kernel/dma/mapping.c has its use of pgprot_dmacoherent() inside
an #ifdef CONFIG_MMU block. kernel/dma/pool.c has its use of
pgprot_dmacoherent() inside an #ifdef CONFIG_DMA_DIRECT_REMAP block.
So select DMA_DIRECT_REMAP only if MMU is enabled for RISCV_DMA_NONCOHERENT
config.
This avoids users to explicitly select MMU.
Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20230901105111.311200-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 712ae0269131..d607ab0f7c6d 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -273,7 +273,7 @@ config RISCV_DMA_NONCOHERENT select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB - select DMA_DIRECT_REMAP + select DMA_DIRECT_REMAP if MMU config RISCV_NONSTANDARD_CACHE_OPS bool |