linux-kernel - Re: [PATCH 10/11] x86: Remove unnecessary ifdefs from i387 code.

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Message-ID: <4C7B951B.3060007@kernel.org>
Date:	Mon, 30 Aug 2010 14:25:15 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Brian Gerst <brgerst@...il.com>
CC:	hpa@...or.com, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/11] x86: Remove unnecessary ifdefs from i387 code.

  On 8/30/10 2:21 PM, Brian Gerst wrote:
> FXSR is a required feature on 64-bit, therefore cpu_has_fxsr is always
>>> true.
>> Yes, I realize that but it will still read boot_cpu_data at runtime, no?
> Look at cpu_has().  It checks REQUIRED_MASK* if the feature bit is a
> constant, and returns true without testing the actual bit in
> boot_cpu_data for required features.
Right you are, thanks for the explanation!
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