Re: [PATCH]serial: make early_uart to use early_prarm instead of console_initcall

[Yinghai Lu]

On 5/21/07, Bjorn Helgaas <bjorn.helgaas@xxxxxx> wrote:
> > earlycon=uart,io,0x3f8,9600n8
> > earlycon=uart,io,0x3f8,9600n8 console=tty0
> > earlycon=uart,mmio,0xff5e0000,115200n8
>
> Why do we have to have a new "earlycon" argument?  Why can't we just
> parse "console=uart" early?

with console=uart, you need to call early_serial_console_init
explictly in your arch setup_arch to get early console.

with console_initcall(early_uart_console_init), the early_uart_console
will be called via console_init in start_kernel, init/main.c that is
not real early console.

YH
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