linux-kernel - Re: [RFC][PATCH] objtool: STAC/CLAC validation

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Message-ID: <20190225115521.GC32494@hirez.programming.kicks-ass.net>
Date:   Mon, 25 Feb 2019 12:55:21 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Julien Thierry <julien.thierry@....com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Will Deacon <will.deacon@....com>,
        Andy Lutomirski <luto@...capital.net>,
        Ingo Molnar <mingo@...nel.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        "linux-alpha@...r.kernel.org" <linux-arm-kernel@...ts.infradead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>, valentin.schneider@....com,
        Brian Gerst <brgerst@...il.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrew Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Denys Vlasenko <dvlasenk@...hat.com>
Subject: Re: [RFC][PATCH] objtool: STAC/CLAC validation

On Mon, Feb 25, 2019 at 08:33:35AM +0000, Julien Thierry wrote:
> > It has an AC_SAFE(func) annotation which allows marking specific
> > functions as safe to call. The patch includes 2 instances which were
> > required to make arch/x86 'build':

> I haven't looked at all the details. But could the annotation be called
> UACCESS_SAFE() (and corresponding naming in the objtool checks)? Since
> this is not an x86 only issue and the AC flags only exists for x86.

Sure that works. Lemme sed the patches.