linux-kernel - Re: [PATCH v12 2/7] x86/arch_prctl/64: Rename do_arch_prctl to do_arch_prctl

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Date:   Fri, 18 Nov 2016 09:16:44 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Kyle Huey <me@...ehuey.com>,
        Robert O'Callahan <robert@...llahan.org>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shuah Khan <shuah@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Borislav Petkov <bp@...e.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Len Brown <len.brown@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Dmitry Safonov <dsafonov@...tuozzo.com>,
        David Matlack <dmatlack@...gle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        linux-kernel@...r.kernel.org,
        user-mode-linux-devel@...ts.sourceforge.net,
        user-mode-linux-user@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH v12 2/7] x86/arch_prctl/64: Rename do_arch_prctl to
 do_arch_prctl_64


* Thomas Gleixner <tglx@...utronix.de> wrote:

> On Fri, 18 Nov 2016, Ingo Molnar wrote:
> 
> > 
> > * Kyle Huey <me@...ehuey.com> wrote:
> > 
> > > In order to introduce new arch_prctls that are not 64 bit only, rename the
> > > existing 64 bit implementation to do_arch_prctl_64(). Also rename the second
> > > argument to arch_prctl(), which will no longer always be an address.
> > 
> > >  #ifdef CONFIG_X86_64
> > >  void entry_SYSCALL_64(void);
> > > +long do_arch_prctl_64(struct task_struct *task, int code, unsigned long arg2);
> > >  #endif
> > 
> > Could you please also rename the weirdly named 'code' argument to 'option',
> > to be in line with the existing sys_prctl() interface nomenclature?
> 
> I'll fix that up when picking up the series. No need for another iteration, ok?

I think the main patch needs a bit of conceptual work still:

 - simpler ABI
 - better exec() behavior
 - simpler, better, faster implementation for the MSR writes

... see the mail I just wrote.

Thanks,

	Ingo