linux-kernel - Re: WMI and Kernel:User interface

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Message-ID: <20170620072906.GI32387@pali>
Date:   Tue, 20 Jun 2017 09:29:06 +0200
From:   Pali Rohár <pali.rohar@...il.com>
To:     Darren Hart <dvhart@...radead.org>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Christoph Hellwig <hch@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mario Limonciello <mario_limonciello@...l.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rafael Wysocki <rjw@...ysocki.net>,
        LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org
Subject: Re: WMI and Kernel:User interface

On Monday 19 June 2017 20:37:25 Darren Hart wrote:
> dell-wmi:
> Type and code, where type may be, for example, "sequence" and then each byte of
> buffen length is processed as a key.

It is more complicated. Buffer can contain more sequences (each has own
length) and each sequence can contain different hotkey + additional info.

So I doubt it would be possible to describe in context-free grammar
specification of even buffer... And something more complicated (as L0 or
L1) is not a good idea to parse in kernel.

-- 
Pali Rohár
pali.rohar@...il.com