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    Subject[PATCH RESEND v5 0/2] x86/earlyprintk: setup earlyprintk as early as possible
    Date
    The early_printk function is usable after setup_early_printk will be executed. We
    pass 'earlyprintk' through the kernel command line. It means that earlyprintk
    will be usable only after the 'parse_early_param' will be executed. So we have
    usable earlyprintk only during early boot, kernel decompression and after call
    of the 'parse_early_param'. This patchset makes earlyprintk usable before the
    call of the 'parse_early_param'.

    These patchset provides two patches:

    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

    Changes v5:

    * Call setup_builtin_cmdline instead of setup_cmdline

    Changes v4:

    * Move setup_early_serial_console from the include/linux/printk.h
    to the arch/x86/include/asm/serial.h, because this function is only
    for x86 now.

    Changes v3:

    * Call setup_cmdline before setup_early_printk;
    * setup_early_printk call wrapped with the setup_early_serial_console which
    checks that 'serial' given to the earlyprintk command line option. This
    prevents call of the setup_early_printk with the given pciserial/dbgp/efi,
    because they are using early_ioremap.

    Changes v2:

    * Comment added before the setup_early_printk call;
    * Added information about testing to the commit message.

    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



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