Re: [RFC 5/5] HACK: serial: move pl011 initcall to device_initcall

From: Leif Lindholm
Date: Tue Sep 08 2015 - 12:55:34 EST


On Tue, Sep 08, 2015 at 01:56:08PM +0100, Mark Rutland wrote:
> On Tue, Sep 08, 2015 at 01:43:37PM +0100, Leif Lindholm wrote:
> > ---
> > drivers/tty/serial/amba-pl011.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
> > index 452dbba..31cf985 100644
> > --- a/drivers/tty/serial/amba-pl011.c
> > +++ b/drivers/tty/serial/amba-pl011.c
> > @@ -2806,7 +2806,7 @@ static void __exit pl011_exit(void)
> > * While this can be a module, if builtin it's most likely the console
> > * So let's leave module_exit but move module_init to an earlier place
> > */
> > -arch_initcall(pl011_init);
> > +device_initcall(pl011_init);
> > module_exit(pl011_exit);
>
> What's the ordering constraint that you're trying to solve with this?

Basically that _CRS is not available until the ACPI subsystem is up -
so when uart_add_one_port() calls acpi_console_check(), that function
looks for a match against variables that have not been set yet.

> The cover didn't mention anything, and there's no commit message.

That's because I really don't want it committed :)

> Mark.
>
> >
> > MODULE_AUTHOR("ARM Ltd/Deep Blue Solutions Ltd");
> > --
> > 2.1.4
> >
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