Re: [PATCH 1/2] arm64: mm: apply __ro_after_init to memory_limit

[Ard Biesheuvel]

On Wed, 15 Dec 2021 at 07:55, Peng Fan (OSS) <peng.fan@xxxxxxxxxxx> wrote:
>
> From: Peng Fan <peng.fan@xxxxxxx>
>
> This variable is only set during initialization, so mark with
> __ro_after_init.
>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>

Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>

> ---
>  arch/arm64/mm/init.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> index a8834434af99..db63cc885771 100644
> --- a/arch/arm64/mm/init.c
> +++ b/arch/arm64/mm/init.c
> @@ -172,7 +172,7 @@ int pfn_is_map_memory(unsigned long pfn)
>  }
>  EXPORT_SYMBOL(pfn_is_map_memory);
>
> -static phys_addr_t memory_limit = PHYS_ADDR_MAX;
> +static phys_addr_t memory_limit __ro_after_init = PHYS_ADDR_MAX;
>
>  /*
>   * Limit the memory size that was specified via FDT.
> --
> 2.25.1
>
>
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