linux-kernel - Re: [PATCH 19/20] objtool: uaccess PUSHF/POPF support

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Message-ID: <20190310131251.GJ2482@worktop.programming.kicks-ass.net>
Date:   Sun, 10 Mar 2019 14:12:51 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     torvalds@...ux-foundation.org, tglx@...utronix.de, hpa@...or.com,
        julien.thierry@....com, will.deacon@....com, luto@...capital.net,
        mingo@...nel.org, catalin.marinas@....com, james.morse@....com,
        valentin.schneider@....com, brgerst@...il.com, luto@...nel.org,
        bp@...en8.de, dvlasenk@...hat.com, linux-kernel@...r.kernel.org,
        dvyukov@...gle.com, rostedt@...dmis.org
Subject: Re: [PATCH 19/20] objtool: uaccess PUSHF/POPF support

On Fri, Mar 08, 2019 at 03:11:22PM -0600, Josh Poimboeuf wrote:
> On Thu, Mar 07, 2019 at 12:45:30PM +0100, Peter Zijlstra wrote:
> > Add PUSHF / POPF state.uaccess restore logic.
> > 
> > XXX: should possibly be merged with the previous patch such that KASAN
> > doesn't explode in between. Split for review.
> 
> Needs more description -- namely, what and why.

See patch 8. This really should be folded back in the previous patch,
but it is easier to look at without all that mixed in.