linux-kernel - Re: [PATCH 4/4] riscv: check for kernel config option in t-head memory types errata

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Date:   Fri, 2 Sep 2022 11:50:16 +0200
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, conor.dooley@...rochip.com,
        guoren@...nel.org, apatel@...tanamicro.com, atishp@...osinc.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] riscv: check for kernel config option in t-head
 memory types errata

On Fri, Sep 02, 2022 at 12:27:44AM +0200, Heiko Stuebner wrote:
> The t-head variant of page-based memory types should also check first
> for the enabled kernel config option.
> 
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> ---
>  arch/riscv/errata/thead/errata.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c
> index a6f4bd8ccf3f..902e12452821 100644
> --- a/arch/riscv/errata/thead/errata.c
> +++ b/arch/riscv/errata/thead/errata.c
> @@ -17,6 +17,9 @@
>  static bool errata_probe_pbmt(unsigned int stage,
>  			      unsigned long arch_id, unsigned long impid)
>  {
> +	if (!IS_ENABLED(CONFIG_ERRATA_THEAD_PBMT))
> +		return false;
> +
>  	if (arch_id != 0 || impid != 0)
>  		return false;
>  
> -- 
> 2.35.1
>

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>