linux-kernel - Re: [PATCH v9 1/2] fork: extend clone3() to support setting a PID

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Date:   Thu, 14 Nov 2019 09:22:09 +0100
From:   Adrian Reber <areber@...hat.com>
To:     Christian Brauner <christian.brauner@...ntu.com>
Cc:     Eric Biederman <ebiederm@...ssion.com>,
        Pavel Emelyanov <ovzxemul@...il.com>,
        Jann Horn <jannh@...gle.com>, Oleg Nesterov <oleg@...hat.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-kernel@...r.kernel.org, Andrei Vagin <avagin@...il.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Radostin Stoyanov <rstoyanov1@...il.com>
Subject: Re: [PATCH v9 1/2] fork: extend clone3() to support setting a PID

On Thu, Nov 14, 2019 at 09:14:00AM +0100, Christian Brauner wrote:
> On Thu, Nov 14, 2019 at 08:07:08AM +0100, Adrian Reber wrote:
> >   * The structure is versioned by size and thus extensible.
> >   * New struct members must go at the end of the struct and
> > @@ -71,6 +85,8 @@ struct clone_args {
> >  	__aligned_u64 stack;
> >  	__aligned_u64 stack_size;
> >  	__aligned_u64 tls;
> > +	__aligned_u64 set_tid;
> > +	__aligned_u64 set_tid_size;
> 
> Oh, one thing that is missing is the addition of
> 
> +#define CLONE_ARGS_SIZE_VER1 80 /* sizeof second published struct */
> 
> in sched.h. Please add that, when you resend.

Even if it is unused?

		Adrian