[PATCH] riscv: split cache ops out of dma-noncoherent.c

[Lad, Prabhakar]

On Sat, Oct 28, 2023 at 4:55 PM Christoph Hellwig <hch at lst.de> wrote:
>
> The cache ops are also used by the pmem code which is unconditionally
> built into the kernel.  Move them into a separate file that is built
> based on the correct config option.
>
> Fixes: fd962781270e ("riscv: RISCV_NONSTANDARD_CACHE_OPS shouldn't depend on RISCV_DMA_NONCOHERENT")
> Reported-by: kernel test robot <lkp at intel.com>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  arch/riscv/mm/Makefile          |  1 +
>  arch/riscv/mm/cache-ops.c       | 17 +++++++++++++++++
>  arch/riscv/mm/dma-noncoherent.c | 15 ---------------
>  3 files changed, 18 insertions(+), 15 deletions(-)
>  create mode 100644 arch/riscv/mm/cache-ops.c
>

Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com> #
On RZ/Five SMARC

Cheers,
Prabhakar

> diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile
> index 9c454f90fd3da2..3a4dfc8babcf8c 100644
> --- a/arch/riscv/mm/Makefile
> +++ b/arch/riscv/mm/Makefile
> @@ -36,3 +36,4 @@ endif
>
>  obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o
>  obj-$(CONFIG_RISCV_DMA_NONCOHERENT) += dma-noncoherent.o
> +obj-$(CONFIG_RISCV_NONSTANDARD_CACHE_OPS) += cache-ops.o
> diff --git a/arch/riscv/mm/cache-ops.c b/arch/riscv/mm/cache-ops.c
> new file mode 100644
> index 00000000000000..a993ad11d0eca9
> --- /dev/null
> +++ b/arch/riscv/mm/cache-ops.c
> @@ -0,0 +1,17 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2021 Western Digital Corporation or its affiliates.
> + */
> +
> +#include <asm/dma-noncoherent.h>
> +
> +struct riscv_nonstd_cache_ops noncoherent_cache_ops __ro_after_init;
> +
> +void
> +riscv_noncoherent_register_cache_ops(const struct riscv_nonstd_cache_ops *ops)
> +{
> +       if (!ops)
> +               return;
> +       noncoherent_cache_ops = *ops;
> +}
> +EXPORT_SYMBOL_GPL(riscv_noncoherent_register_cache_ops);
> diff --git a/arch/riscv/mm/dma-noncoherent.c b/arch/riscv/mm/dma-noncoherent.c
> index b76e7e192eb183..341bd6706b4c56 100644
> --- a/arch/riscv/mm/dma-noncoherent.c
> +++ b/arch/riscv/mm/dma-noncoherent.c
> @@ -15,12 +15,6 @@ static bool noncoherent_supported __ro_after_init;
>  int dma_cache_alignment __ro_after_init = ARCH_DMA_MINALIGN;
>  EXPORT_SYMBOL_GPL(dma_cache_alignment);
>
> -struct riscv_nonstd_cache_ops noncoherent_cache_ops __ro_after_init = {
> -       .wback = NULL,
> -       .inv = NULL,
> -       .wback_inv = NULL,
> -};
> -
>  static inline void arch_dma_cache_wback(phys_addr_t paddr, size_t size)
>  {
>         void *vaddr = phys_to_virt(paddr);
> @@ -162,12 +156,3 @@ void __init riscv_set_dma_cache_alignment(void)
>         if (!noncoherent_supported)
>                 dma_cache_alignment = 1;
>  }
> -
> -void riscv_noncoherent_register_cache_ops(const struct riscv_nonstd_cache_ops *ops)
> -{
> -       if (!ops)
> -               return;
> -
> -       noncoherent_cache_ops = *ops;
> -}
> -EXPORT_SYMBOL_GPL(riscv_noncoherent_register_cache_ops);
> --
> 2.39.2
>
>
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