linux-kernel - Re: [PATCH RT 27/32] x86/fpu: Dont cache access to fpu_fpregs_owner

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Message-ID: <20200122084352.nyqnlfaumjgnvgih@linutronix.de>
Date:   Wed, 22 Jan 2020 09:43:52 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Carsten Emde <C.Emde@...dl.org>,
        John Kacur <jkacur@...hat.com>,
        Julia Cartwright <julia@...com>,
        Daniel Wagner <wagi@...om.org>,
        Tom Zanussi <zanussi@...nel.org>, Borislav Petkov <bp@...e.de>,
        Rik van Riel <riel@...riel.com>,
        Aubrey Li <aubrey.li@...el.com>,
        Austin Clements <austin@...gle.com>,
        Barret Rhoden <brho@...gle.com>,
        Dave Hansen <dave.hansen@...el.com>,
        David Chase <drchase@...ang.org>,
        "H. Peter Anvin" <hpa@...or.com>, ian@...s.com,
        Ingo Molnar <mingo@...hat.com>,
        Josh Bleecher Snyder <josharian@...il.com>,
        x86-ml <x86@...nel.org>, stable-rt@...r.kernel.org
Subject: Re: [PATCH RT 27/32] x86/fpu: Dont cache access to
 fpu_fpregs_owner_ctx

On 2020-01-17 12:41:38 [-0500], Steven Rostedt wrote:
> 4.19.94-rt39-rc1 stable review patch.
> If anyone has any objections, please let me know.
> 
…
> Fixes: 5f409e20b7945 ("x86/fpu: Defer FPU state load until return to userspace")

This isn't needed for the v4.19 tree. As far as I can tell, there is no
"Defer FPU state load until return to userspace" in it.

Sebastian