[PATCH 0/2] x86/earlyprintk: setup earlyprintk as early as possible

[Alexander Kuleshov <kuleshovmail@gmail.com>]

As setup_early_printk passed to the early_param, it will be usable only after
'parse_early_param' function will be called from the 'setup_arch'. So we have
earlyprintk during early boot and decompression. Next point after decompression
of the kernel where we can use early_printk is after call of the
'parse_early_param'.

These patchset provides two patches where:

1. Move handling of the builtin command line to the separate function
from the setup_arch. Now we can call it from the arch/x86/kernel/head{32,64}.c,
and find 'earlyprintk' kernel command line paramter there.

2. Provide setup_serial_console function to setup serial earlyprintk in the
arch/x86/kernel/head{32,64}.c

Alexander Kuleshov (2):
  x86/setup: update boot_command_line with builtin_cmdline in separate
    function
  x86/earlyprintk: setup earlyprintk as early as possible

 arch/x86/include/asm/serial.h  |  2 ++
 arch/x86/include/asm/setup.h   |  3 ++-
 arch/x86/kernel/early_printk.c | 25 +++++++++++++++++++++++++
 arch/x86/kernel/head32.c       |  6 ++++++
 arch/x86/kernel/head64.c       |  7 +++++++
 arch/x86/kernel/setup.c        | 28 +++++++++++++++-------------
 6 files changed, 57 insertions(+), 14 deletions(-)

-- 
2.4.0