linux-kernel - Re: [RFC 1/3] abi_spec: basic definitions of constraints, args and syscalls

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Date:   Wed, 23 Nov 2016 10:33:52 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     alexander.levin@...izon.com
Cc:     "dvyukov@...gle.com" <dvyukov@...gle.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "scientist@...com" <scientist@...com>,
        "glider@...gle.com" <glider@...gle.com>,
        "andreyknvl@...gle.com" <andreyknvl@...gle.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "mathieu.desnoyers@...icios.com" <mathieu.desnoyers@...icios.com>,
        "daniel.vetter@...ll.ch" <daniel.vetter@...ll.ch>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 1/3] abi_spec: basic definitions of constraints, args and
 syscalls

On Wed, 23 Nov 2016 15:03:23 +0000
alexander.levin@...izon.com wrote:


>  - This should also work for ioctls in the future.

Any ioctl that requires more than 6 arguments should also be NACKed in
the future. If you need that many arguments, its best to simply create
a structure and pass that it.

Again, the function syscalls_get_arguments() will BUG() on most archs
if it expects more than 6 arguments.

-- Steve