linux-kernel - Re: [PATCH 4.14 04/69] x86/power/32: Move SYSENTER MSR restoration to fix_processor

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Date:   Mon, 15 Apr 2019 22:07:47 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bpetkov@...e.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Zhang Rui <rui.zhang@...el.com>,
        Ingo Molnar <mingo@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.14 04/69] x86/power/32: Move SYSENTER MSR restoration
 to fix_processor_context()

On Mon 2019-04-15 20:58:22, Greg Kroah-Hartman wrote:
> [ Upstream commit 896c80bef4d3b357814a476663158aaf669d0fb3 ]
> 
> x86_64 restores system call MSRs in fix_processor_context(), and
> x86_32 restored them along with segment registers.  The 64-bit
> variant makes more sense, so move the 32-bit code to match the
> 64-bit code.
> 
> No side effects are expected to runtime behavior.

Again, this is cleanup, not a bugfix.
							Pavel
							
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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