Re: [RFC PATCH v1 01/10] riscv: Define ioremap_cache for RISC-V

Anup Patel
2025-05-05T12:32:13Z

On Thu, Feb 27, 2025 at 6:08 PM Himanshu Chauhan
<hchauhan@ventanamicro.com> wrote:
>
> bert and einj drivers use ioremap_cache for mapping entries
> but ioremap_cache is not defined for RISC-V.
>
> Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
> ---
> arch/riscv/include/asm/io.h | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h
> index 1c5c641075d2..e23a4901e928 100644
> --- a/arch/riscv/include/asm/io.h
> +++ b/arch/riscv/include/asm/io.h
> @@ -30,6 +30,9 @@
> #define PCI_IOBASE ((void __iomem *)PCI_IO_START)
> #endif /* CONFIG_MMU */
>
> +#define ioremap_cache(addr, size) \
> + ((__force void *)ioremap_prot((addr), (size), _PAGE_KERNEL))
> +

There is a compile error observed with this patch applied
on the latest Linux-6.15-rcX kernel.

To fix compile error, we need the following change:
s/_PAGE_KERNEL/PAGE_KERNEL/

Regards,
Anup