Re: [PATCH v5 2/2] arch/x86: remove pci uart early console from early_prink.c

From: Thomas Gleixner
Date: Tue Jun 02 2015 - 17:07:59 EST


On Tue, 2 Jun 2015, Bin Gao wrote:
> On Tue, Jun 02, 2015 at 01:54:33PM +0200, Ingo Molnar wrote:
> >
> > * Bin Gao <bin.gao@xxxxxxxxxxxxxxx> wrote:
> >
> > > The arch independent uart8250 early console driver has good support for memory
> > > mapped and io port based 8250 uarts. Since pci is arch independent so it's
> > > natural to extend uart8250 to support mem, io and pci. Hence pci uart early
> > > console in arch/x86/kernel_printk.c by the following commit: 'commit
> > > 5140fda16051 ("Specify PCI based UART for earlyprintk")' is removed. And its
> > > equivalent function will be available from uart8250 early console driver.
> >
> > In what way have you tested this change, does serial-earlyprintk still work on x86
> > after the change?
> >
> > Thanks,
> >
> > Ingo
>
> Yes, this patch was tested with earlyprintk=serial,0x3f8 on my x86 box and
> the early console worked fine.

What about the memory mapped uarts which have been source of trouble
in the past?

Thanks,

tglx
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