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

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Date:   Wed, 15 Dec 2021 08:30:35 +0100
From:   Ard Biesheuvel <ardb@...nel.org>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        NXP Linux Team <linux-imx@....com>,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 1/2] arm64: mm: apply __ro_after_init to memory_limit

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

Acked-by: Ard Biesheuvel <ardb@...nel.org>

> ---
>  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
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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