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

Alexander Kuleshov
2015-05-10T19:14:00Z

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(-)

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2.4.0