linux-kernel - Re: [PATCH v3 07/13] riscv: fpu: switch has_fpu() to riscv_has_extension_likely()

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Message-ID: <Y8CChK9XBXTcT9wn@spud>
Date:   Thu, 12 Jan 2023 21:58:28 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Heiko Stuebner <heiko@...ech.de>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, kvm-riscv@...ts.infradead.org,
        Andrew Jones <ajones@...tanamicro.com>
Subject: Re: [PATCH v3 07/13] riscv: fpu: switch has_fpu() to
 riscv_has_extension_likely()

On Thu, Jan 12, 2023 at 01:10:21AM +0800, Jisheng Zhang wrote:
> Switch has_fpu() from statich branch to the new helper

s/statich/static

> riscv_has_extension_likely().
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
> Reviewed-by: Heiko Stuebner <heiko@...ech.de>

Modulo whatever psuedo-cpufeature shenanigans require renaming the
function, you can tack my name onto this list also...
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks,
Conor.

> ---
>  arch/riscv/include/asm/switch_to.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/include/asm/switch_to.h b/arch/riscv/include/asm/switch_to.h
> index 11463489fec6..60f8ca01d36e 100644
> --- a/arch/riscv/include/asm/switch_to.h
> +++ b/arch/riscv/include/asm/switch_to.h
> @@ -59,7 +59,8 @@ static inline void __switch_to_aux(struct task_struct *prev,
>  
>  static __always_inline bool has_fpu(void)
>  {
> -	return static_branch_likely(&riscv_isa_ext_keys[RISCV_ISA_EXT_KEY_FPU]);
> +	return riscv_has_extension_likely(RISCV_ISA_EXT_f) ||
> +		riscv_has_extension_likely(RISCV_ISA_EXT_d);
>  }
>  #else
>  static __always_inline bool has_fpu(void) { return false; }
> -- 
> 2.38.1
> 
> 
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

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