Re: [PATCH v4 1/2] serial_core: add pci uart early console support

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, May 20, 2015 at 02:17:40PM -0700, Bin Gao wrote:
> On some Intel Atom SoCs, the legacy IO port UART(0x3F8) is not available.
> Instead, a 8250 compatible PCI uart can be used as early console.
> This patch adds pci support to the 8250 early console driver uart8250.
> For example, to enable pci uart(00:21.3) as early console on these
> platforms, append the following line to the kernel command line
> (assume baud rate is 115200):
> earlyprintk=uart8250,pci32,0:24.2,115200n8
> 
> Signed-off-by: Bin Gao <bin.gao@intel.com>
> ---
>  arch/x86/Kconfig                 |   1 +
>  drivers/pci/Kconfig              |  11 +++
>  drivers/tty/serial/earlycon.c    |   9 +++
>  drivers/tty/serial/serial_core.c | 145 ++++++++++++++++++++++++++++++++++++++-
>  4 files changed, 164 insertions(+), 2 deletions(-)

What changed in this version?

You can't just put "v4" without giving us some hint as to the
differences here, sorry.