[alsa-devel] [PATCH] driver core: remove CONFIG_SYSFS_DEPRECATED
Eric W. Biederman
ebiederm at xmission.com
Thu Jul 15 06:29:53 CEST 2010
Greg KH <gregkh at suse.de> writes:
> On Wed, Jul 14, 2010 at 05:40:27PM -0700, Eric W. Biederman wrote:
>> Andrew Morton <akpm at linux-foundation.org> writes:
>> > On Fri, 9 Jul 2010 11:54:50 -0700
>> > Greg Kroah-Hartman <gregkh at suse.de> wrote:
>> >> This is no longer needed by any userspace tools, so it's safe to
>> >> remove.
>> > Makes my FC6 test box not boot - can't find /dev/root. Then when I go
>> > back to plain old mainline (2.6.35-rc5) and run `make oldconfig', the
>> > .config change sticks:
>> > @@ -106,8 +106,7 @@
>> > CONFIG_LOG_BUF_SHIFT=17
>> > CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
>> > # CONFIG_CGROUPS is not set
>> > -CONFIG_SYSFS_DEPRECATED=y
>> > -CONFIG_SYSFS_DEPRECATED_V2=y
>> > +# CONFIG_SYSFS_DEPRECATED_V2 is not set
>> > CONFIG_RELAY=y
>> > CONFIG_NAMESPACES=y
>> > # CONFIG_UTS_NS is not set
>> > and the box still won't boot.
>> The reason FC6 doesn't boot is there is a userspace tool
>> I believe in the initrd that cares about symlinks when it should
> Anyone happen to know which tool it is? I remember we had had issues
> with FC3 around this area, but I thought we resolved them, so it's
> supprising to me that FC6 has issues.
It was something in the initrd, that didn't like the symlinks. It
has been a year or more since I looked at it. At that point I just
enabled SYSFS_DEPRECATED and moved on.
>> What is more interesting is that currently there is a bug in
>> 2.6.35-rc5 where rmmod <netdriver> modprobe <netdriver> will in fact
>> fail. There was an inadvertent regression and no one has noticed or
>> complained. I spotted it by code review just a little bit ago and I
>> haven't had a chance to write and test the fix yet.
>> If the code is going to start bitrotting and no one is going to
>> notice or care simply removing the code instead of subjecting users
>> to weird unexpected breakage seems like a responsible thing to do.
> Yeah, that's what prompted this removal. After the s390 guys said that
> they were all good to go, I figured no one else would have problems with
> it :)
> If it turns out there still are issues with older userspaces like FC6
> that we can't resolve, I have no problem dropping this patch and then we
> will have to fix up the regression.
I still have to test it but it looks like a one liner. Actually two lines
now that I have to fix the error in symlink creation as well.
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