linux-kernel - Re: [PATCH v1 -next 1/2] RISC-V: ACPI : Fix for usage of pointers in different address space

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Date:   Tue, 6 Jun 2023 16:35:29 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Sunil V L <sunilvl@...tanamicro.com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atishp@...shpatra.org>,
        Anup Patel <anup@...infault.org>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v1 -next 1/2] RISC-V: ACPI : Fix for usage of pointers in
 different address space

Hey Sunil,

On Mon, Jun 05, 2023 at 08:05:11PM +0530, Sunil V L wrote:
> The arch specific __acpi_map_table can be wrapper around either
> early_memremap or early_ioremap. But early_memremap
> routine works with normal pointers whereas __acpi_map_table expects
> pointers in iomem address space. This causes kernel test bot to fail
> while using the sparse tool. Fix the issue by using early_ioremap and
> similar fix done for __acpi_unmap_table.
> 
> Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202305201427.I7QhPjNW-lkp@intel.com/

Is this
Fixes: a91a9ffbd3a5 ("RISC-V: Add support to build the ACPI core")
?
Otherwise,
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks,
Conor.

> ---
>  arch/riscv/kernel/acpi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/riscv/kernel/acpi.c b/arch/riscv/kernel/acpi.c
> index df5a45a2eb93..5ee03ebab80e 100644
> --- a/arch/riscv/kernel/acpi.c
> +++ b/arch/riscv/kernel/acpi.c
> @@ -204,7 +204,7 @@ void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
>  	if (!size)
>  		return NULL;
>  
> -	return early_memremap(phys, size);
> +	return early_ioremap(phys, size);
>  }
>  
>  void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
> @@ -212,7 +212,7 @@ void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
>  	if (!map || !size)
>  		return;
>  
> -	early_memunmap(map, size);
> +	early_iounmap(map, size);
>  }
>  
>  void *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
> -- 
> 2.34.1
> 

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