linux-kernel - Re: [RFC] tty: Add get- ioctls to fetch tty status

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Message-ID: <20120927160646.GO6618@moon>
Date:	Thu, 27 Sep 2012 20:06:46 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: Re: [RFC] tty: Add get- ioctls to fetch tty status

On Thu, Sep 27, 2012 at 05:00:37PM +0100, Alan Cox wrote:
> > > Otherwise - TICOGPKT is specific to pty devices. Please therefore put it
> > > in the pty.c code and note that not all platforms use asm-geneic TTY
> > > ioctls so check carefully they all build.
> > 
> > I put it into tty_ioctl.c simply because TIOCPKT was there already so
> > I thought it's good idea to keep them close to each other in code.
> 
> Perhaps we should move TIOCPKT out as well?

OK, so I'll do two patches instead of squashing everything on one patch.

Btw, as far as I see wee are zeroifying tty_struct always twice,
first in alloc_tty_struct and then in initialize_tty_struct again.
And alloc_tty_struct + initialize_tty_struct always used as a tuple
in current code, so I presume they might be squashed in one helper
instead to eliminate overhead, but it's different task.
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