linux-kernel - Re: blank filenames in /sys/modules, kernel 2.6.21

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Date:	Fri, 8 Jun 2007 14:48:49 -0400 (EDT)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Pete Zaitcev <zaitcev@...hat.com>
cc:	Greg KH <greg@...ah.com>,
	USB development list <linux-usb-devel@...ts.sourceforge.net>,
	Chuck Ebbert <cebbert@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: blank filenames in /sys/modules, kernel 2.6.21

On Fri, 8 Jun 2007, Pete Zaitcev wrote:

> On Fri, 8 Jun 2007 11:32:32 -0700, Greg KH <greg@...ah.com> wrote:
>
> > >   and from drivers/usb/core/usb.c:
> > >
> > > /* format to disable USB on kernel command line is: nousb */
> > > __module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
>
> > Pete added that back in December of 2005 (git-blame rocks...).  So what
> > has changed recently to cause this to do different things in sysfs?
> >
> > Robert, what do you suggest we change this usage to look like?
>
> Aww. I thought it was a nice patch, but my foresight was inadequate.
>
> The problem I tried to fix was related to strncmp used in the code which
> supported __setup(). Our installer, Anaconda, recognizes both "nousb" and
> "nousbstorage" - in theory. In practice, passing "nousbstorage" switched
> USB completely off because of improper strncmp(). If we back out my patch,
> this problem is going to reoccur.
>
> We might want to ask Jeremy Katz if "nousbstorage" is even used anymore,
> then revert all this if not. Or, we can add a name somehow and live
> with it visible in sysfs...

there appears to be no reference to "nousbstorage" anywhere in the
tree.  go for it.

rday
-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

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