On Sun, Dec 03, 2006 at 01:24:01AM -0800, Andrew Morton wrote:
> On Sun, 3 Dec 2006 09:15:52 +0100
> Adrian Bunk <[email protected]> wrote:
>
> > On Sun, Dec 03, 2006 at 12:58:24AM -0800, Andrew Morton wrote:
> > > On Sun, 3 Dec 2006 08:16:37 +0100
> > > Adrian Bunk <[email protected]> wrote:
> > >
> > > > Since FW_LOADER is an option that is always select'ed by the code using
> > > > it, it mustn't depend on HOTPLUG.
> > > >
> > > > It's only relevant in the EMBEDDED=y case, but this might have resulted
> > > > in illegal FW_LOADER=, HOTPLUG=n configurations.
> > > >
> > > > Signed-off-by: Adrian Bunk <[email protected]>
> > > >
> > > > --- linux-2.6.19-rc6-mm2/drivers/base/Kconfig.old 2006-12-02 20:36:49.000000000 +0100
> > > > +++ linux-2.6.19-rc6-mm2/drivers/base/Kconfig 2006-12-02 20:37:03.000000000 +0100
> > > > @@ -19,8 +19,8 @@
> > > > If unsure say Y here.
> > > >
> > > > config FW_LOADER
> > > > - tristate "Userspace firmware loading support"
> > > > - depends on HOTPLUG
> > > > + tristate
> > > > + select HOTPLUG
> > >
> > > It would be a retrograde step to start selecting HOTPLUG - we've managed to
> > > avoid it thus far.
> >
> > $ grep -r "select HOTPLUG" * | wc -l
> > 4
> > $
> >
> > > It'd be better to make those drivers which select FW_LOADER dependent upon
> > > HOTPLUG.
> >
> > $ grep -r "select FW_LOADER" * | wc -l
> > 71
>
> 46 actually. And it's immaterial.
Sorry, I had some .old and .orig files in my tree...
> > And since the only case where depends<->select makes a difference is
> > CONFIG_EMBEDDED=y, people will always continue to forget the dependency
> > on HOTPLUG when select'ing FW_LOADER.
>
> I realise that. But having HOTPLUG magically and mysteriously turn itself
> back on again is a pita.
In practice, it's already always turned on (except for CONFIG_EMBEDDED=n).
Unless Kconfig gets changed to automatically inherit dependencies of
select'ed symbols, FW_LOADER not select'ing HOTPLUG is simply a constant
source of bugs.
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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