linux-kernel - Re: [RFC][PATCHES] termios.h cleanups

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Date:   Sun, 21 Aug 2022 01:30:54 +0100
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [RFC][PATCHES] termios.h cleanups

On Sat, Aug 20, 2022 at 02:44:09PM -0700, Linus Torvalds wrote:
> On Sat, Aug 20, 2022 at 11:44 AM Al Viro <viro@...iv.linux.org.uk> wrote:
> >
> >         Umm...  Might as well, I guess...  Where to put those, though?
> > drivers/tty/tty_ioctl.c is not an option, unfortunately - it'll pick
> > the local definitions, __weak or no __weak.
> 
> IThat bug is ancient history, and tty_ioctl.c is just fine.
> 
> Yes, we used to have the "you can't have __weak function definitions
> in the same file that uses them" rule.
> 
> But it was due to a bug in gcc-4.1, which would inline weak functions.
> 
> But we long since gave up on gcc-4.1, and we have __weak functions
> declarations in the same file as the use in multiple places. See for
> example arch_release_task_struct() in kernel/fork.c.

OK, that allows to reorder the whole thing better...  See #work.termios2
(very lightly tested)