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Message-Id: <1161240308.3376.463.camel@pmac.infradead.org>
Date: Thu, 19 Oct 2006 07:45:08 +0100
From: David Woodhouse <dwmw2@...radead.org>
To: Alan Cox <alan@...rguk.ukuu.org.uk>
Cc: akpm@...l.org, linux-kernel@...r.kernel.org,
linux-serial@...r.kernel.org
Subject: Re: [PATCH] tty: preparatory structures for termios revamp
On Wed, 2006-10-18 at 18:39 +0100, Alan Cox wrote:
> In order to sort out our struct termios and add proper speed control we
> need to separate the kernel and user termios structures. Glibc is fine
> but the other libraries rely on the kernel exported struct termios and
> we need to extend this without breaking the ABI/API
>
> To do so we add a struct ktermios which is the kernel view of a termios
> structure and overlaps the struct termios with extra fields on the end
> for now. (That limitation will go away in later patches). Some platforms
> (eg alpha) planned ahead and thus use the same struct for both, others
> did not.
>
>
> This just adds the structures but does not use them, it seems a sensible
> splitting point for bisect if there are compile failures (not that I
> expect them)
Why have separate copies of almost identical structures in each
architecture -- can we not put the new structure in
asm-generic/termbits.h and use that for all but SPARC, which has the
extra _x_cc field?
--
dwmw2
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