Re: WARN_ON(): proc_dir_entry 'rtc' already registered

From: Pavel Machek
Date: Mon Feb 18 2008 - 05:54:31 EST


Hi!

> > I'm getting this during bootup:
> >
> > PM: Adding info for No Bus:event6
> > PM: Adding info for No Bus:uinput
> > PM: Adding info for No Bus:rtc0
> > proc_dir_entry 'rtc' already registered
> > Pid: 1, comm: swapper Not tainted 2.6.25-rc1 #125
> > ... deletia
> > =======================
> > rtc_cmos 00:07: rtc core: registered rtc_cmos as rtc0
> > rtc0: alarms up to one month, y3k
> > PM: Adding info for platform:coretemp.0
> > PM: Adding info for No Bus:hwmon1
> >
> > ... .config attached.
>
> Which shows:
>
> CONFIG_GEN_RTC=y
> CONFIG_GEN_RTC_X=y
>
> Disable that, then those warnings will vanish. (I'm told that
> having proc_register() return a fault code is off the table,
> much like impeachment.)

Ok.

> How to fix ... how about: instead of just warning folk
> off such legacy RTC drivers [1] we just wrap them with
> an "if RTC_LIB != n" so this mistake won't be possible.

Yes, disabling bad configs in Kconfig seems like way to go.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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