linux-kernel - Re: [PATCH 1/4] ns: prepare time namespace for clone3()

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Message-ID: <20200318105747.GP27301@uranus>
Date:   Wed, 18 Mar 2020 13:57:47 +0300
From:   Cyrill Gorcunov <gorcunov@...il.com>
To:     Adrian Reber <areber@...hat.com>
Cc:     Christian Brauner <christian.brauner@...ntu.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Pavel Emelyanov <ovzxemul@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Andrei Vagin <avagin@...il.com>, linux-kernel@...r.kernel.org,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Radostin Stoyanov <rstoyanov1@...il.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 1/4] ns: prepare time namespace for clone3()

On Tue, Mar 17, 2020 at 09:30:41AM +0100, Adrian Reber wrote:
...
> +/*
> + * This structure is used to set the time namespace offset
> + * via /proc as well as via clone3().
> + */
> +struct set_timens_offset {
> +	int			clockid;
> +	struct timespec64	val;
> +};
> +

I'm sorry, I didn't follow this series much so can't comment right now.
Still this structure made me a bit wonder -- the @val seems to be 8 byte
aligned and I guess we have a useless pad between these members. If so
can we swap them? Or it is already part of api?