linux-kernel - Re: [PATCH V8 05/44] x86/fpu: Refactor arch_set_user_pkey

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Date:   Fri, 28 Jan 2022 14:50:44 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     ira.weiny@...el.com, Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dan Williams <dan.j.williams@...el.com>
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V8 05/44] x86/fpu: Refactor arch_set_user_pkey_access()

On 1/27/22 09:54, ira.weiny@...el.com wrote:
> From: Ira Weiny <ira.weiny@...el.com>
> 
> Both PKU and PKS update their register values in the same way.  They can
> therefore share the update code.
> 
> Define a helper, pkey_update_pkval(), which will be used to support both
> Protection Key User (PKU) and the new Protection Key for Supervisor
> (PKS) in subsequent patches.
> 
> pkey_update_pkval() contributed by Thomas
> 
> Co-developed-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>

Looks better than my original code.  Waaaaaay simpler.

Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>