linux-kernel - Re: [PATCH V2] LoongArch: Provide kernel fpu functions

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Message-ID: <984b486f-0613-6adc-4e87-5fc00560498f@infradead.org>
Date:   Sun, 5 Mar 2023 19:15:39 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Huacai Chen <chenhuacai@...ngson.cn>,
        Arnd Bergmann <arnd@...db.de>,
        Huacai Chen <chenhuacai@...nel.org>
Cc:     loongarch@...ts.linux.dev, linux-arch@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-kernel@...r.kernel.org, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH V2] LoongArch: Provide kernel fpu functions

Hi,


On 3/5/23 19:12, Huacai Chen wrote:
> +void kernel_fpu_begin(void)
> +{
> +	if(this_cpu_read(in_kernel_fpu))

	if (
> +		return;
> +
> +	preempt_disable();
> +	this_cpu_write(in_kernel_fpu, true);
> +
> +	if (!is_fpu_owner())
> +		enable_fpu();
> +	else
> +		_save_fp(&current->thread.fpu);
> +}
> +EXPORT_SYMBOL(kernel_fpu_begin);
> +
> +void kernel_fpu_end(void)
> +{
> +	if(!this_cpu_read(in_kernel_fpu))

	if (

i.e., add a space after "if".

> +		return;
> +
> +	if (!is_fpu_owner())
> +		disable_fpu();
> +	else
> +		_restore_fp(&current->thread.fpu);
> +
> +	this_cpu_write(in_kernel_fpu, false);
> +	preempt_enable();
> +}
> +EXPORT_SYMBOL(kernel_fpu_end);

-- 
~Randy