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SubjectRe: [PATCH] platform_driver_register: warn if probe is in .init.text
Hello Dmitry,

> > > > + if (drv->probe && kernel_init_text_address((unsigned long)drv->probe))
> > > > + pr_warning("oops-warning: probe function of platform driver %s"
> > > > + " lives in .init.text\n", drv->driver.name);
> > > > +#else
> > > > + /*
> > > > + * without HOTPLUG probe functions can be discarded after the driver is
> > > > + * loaded.
> > > > + * There is a little chance for false positives, namely if the driver is
> > > > + * registered after the .init sections are discarded.
> > > > + */
> > > > + if (drv->probe && !kernel_init_text_address((unsigned long)drv->probe))
> > > > + pr_info("probably the probe function of platform driver %s can"
> > > > + " be moved to .init.text\n", drv->driver.name);
> > >
> > > It really depends on the user's (or rather builder's) local
> > > configuration so how can we make this suggestion?
> > Can you point out a situation that makes the suggestion wrong? AFAIK
> > there only the possibility that the driver is loaded after .init is
> > discarded (as written in the comment).
> >
>
> The presence of CONFIG_HOTPLUG depends on particular .config, so, for
> example, you may not have it set while I have. So you will boot, get the
> suggestion, submit a patch, then I will boot and will get a warning that
> the probe function is in wrong section.
>
> So in general I wonder if it is possible to request that all probe
> functions are marked as __devinit or not marked at all, regardless of
> CONFIG_HOTPLUG and CONFIG_MODULE settings.
Would you agree if the message would change to

probably the probe function of platform driver %s can be moved
to .devinit.text

?

Best regards
Uwe

--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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