Date: Tue, 14 Jul 2015 20:02:35 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Andrey Vagin <avagin@openvz.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Cyrill Gorcunov <gorcunov@openvz.org>,
        Pavel Emelyanov <xemul@parallels.com>, Roger Luethi <rl@hellgate.ch>,
        Arnd Bergmann <arnd@arndb.de>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        David Ahern <dsahern@gmail.com>, Andy Lutomirski <luto@amacapital.net>,
        Pavel Odintsov <pavel.odintsov@gmail.com>
Subject: Re: [PATCH 08/24] proc: pick out a function to iterate task
	children
Message-ID: <20150714180235.GB8088@redhat.com>
References: <1436172445-6979-1-git-send-email-avagin@openvz.org> <1436172445-6979-9-git-send-email-avagin@openvz.org>
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On 07/06, Andrey Vagin wrote:
>
> -static struct pid *
> -get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos)
> +static struct task_struct *
> +task_next_child(struct task_struct *parent, struct task_struct *prev, unsigned int pos)
>  {

I won't really argue, just a question...

So this patch changes it to accept/return task_struct rather pid. Why?
it is better to get/put "struct pid" only, not the whole task_struct.

If another caller want task_struct, the necessary conversion is simple.
But again, I won't argue if you think this will complicate the non-proc
users of this helper.

Oleg.

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