linux-kernel - Re: 8250.nr_uarts broken in 3.7

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Message-ID: <20130308231100.GN13719@hansolo.jdub.homelinux.org>
Date:	Fri, 8 Mar 2013 18:11:01 -0500
From:	Josh Boyer <jwboyer@...hat.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: 8250.nr_uarts broken in 3.7

On Fri, Mar 08, 2013 at 11:58:39PM +0100, Jiri Slaby wrote:
> On 03/08/2013 11:49 PM, Josh Boyer wrote:
> > On Fri, Mar 08, 2013 at 11:47:01PM +0100, Jiri Slaby wrote:
> >> Yeah, I agree this is ugly. Just re-definining MODULE_PARAM_PREFIX at
> >> the end of the file should do the trick (followed by
> >> "module_param(nr_uarts, uint, 0644)").
> > 
> > For some reason, I thought I had tried that.  Maybe I didn't.  I'll look
> > into it again.
> 
> I see. Because we would re-define some global variables. What if we put

Right.  For the peanut gallery, you get this error:

CC      drivers/tty/serial/8250/8250.o
drivers/tty/serial/8250/8250.c:3351:1: error: redefinition of ‘__check_share_irqs’
drivers/tty/serial/8250/8250.c:3333:1: note: previous definition of ‘__check_share_irqs’ was here
drivers/tty/serial/8250/8250.c:3351:1: error: redefinition of ‘__param_perm_check_share_irqs’
drivers/tty/serial/8250/8250.c:3333:1: note: previous definition of ‘__param_perm_check_share_irqs’ was here
drivers/tty/serial/8250/8250.c:3351:1: error: redefinition of ‘__param_str_share_irqs’
drivers/tty/serial/8250/8250.c:3333:1: note: previous definition of ‘__param_str_share_irqs’ was here
drivers/tty/serial/8250/8250.c:3351:1: error: redefinition of ‘__param_share_irqs’
drivers/tty/serial/8250/8250.c:3333:1: note: previous definition of ‘__param_share_irqs’ was here

for each variable you redefine like that.

> module_param into a function?

Not sure what you mean by that.

josh
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