Re: [PATCH 2/5] console: console handover to preferred console

[Yinghai Lu <Yinghai.Lu@Sun.COM>]

Andrew Morton wrote:
> On Thu, 31 May 2007 13:58:26 -0700
> Yinghai Lu <Yinghai.Lu@Sun.COM> wrote:
>
> > [PATCH 2/5] console: console handover to preferred console
> >
> > Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
> >
> > diff --git a/kernel/printk.c b/kernel/printk.c
> > index 0bbdeac..7b96cae 100644
> > --- a/kernel/printk.c
> > +++ b/kernel/printk.c
> > @@ -985,12 +1007,15 @@ void register_console(struct console *console)
> >  	if (!(console->flags & CON_ENABLED))
> >  		return;
> >  
> > -	if (bootconsole) {
> > +	if (bootconsole && (console->flags & CON_CONSDEV)) {
> >  		printk(KERN_INFO "console handover: boot [%s%d] -> real [%s%d]\n",
> >  		       bootconsole->name, bootconsole->index,
> >  		       console->name, console->index);
> >  		unregister_console(bootconsole);
> >  		console->flags &= ~CON_PRINTBUFFER;
> > +	} else {
> > +		printk(KERN_INFO "console [%s%d] enabled\n",
> > +		       console->name, console->index);
> >  	}
> >  
> >  	/*
>
> What does this change do, and what is the reason for it??

for earlyprintk=ttyS0,9600 console=tty0 console=ttyS0,9600n8

the handover will happen from earlyser0 to tty0. but what we want is to ttyS0.

later with patch4,
console=tty0 console=uart8250,io,0x3f8,9600n8
will handover to ttyS0 instead of tty0.

Maybe can put above lines into commit log.

YH

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