linux-kernel - Re: [PATCH 3/4] x86/cpufeature: Remove unused and seldomly used cpu_has

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Message-ID: <20151207094504.GA27386@gmail.com>
Date:	Mon, 7 Dec 2015 10:45:04 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] x86/cpufeature: Remove unused and seldomly used
 cpu_has_xx macros

* Borislav Petkov <bp@...en8.de> wrote:

>  static int __init chacha20_simd_mod_init(void)
>  {
> -	if (!cpu_has_ssse3)
> +	if (!boot_cpu_has(X86_FEATURE_SSSE3))
>  		return -ENODEV;

Btw., could we rename 'boot_cpu_has()' to the more appropriate (and shorter!) 
'system_has()' form?

'boot cpu' is a conceptual misnomer here really: it's just an implementational 
detail that we are looking at the boot CPU's flags, what we really mean to express 
is that these are system-wide features with no per-cpu properties.

Agreed?

Thanks,

	Ingo
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