Messages in this thread Patch in this message | | | From | Alexander Kuleshov <> | Subject | [PATCH 2/2] x86/earlyprintk: setup earlyprintk as possible | Date | Tue, 7 Apr 2015 17:02:58 +0600 |
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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'.
This patch removes 'earlyprintk' from the early_param and setup it right after boot data copying. So 'early_printk' function will be usabable after decompression of kernel and before parse_early_param will be called.
Kernel with this patch was tested with qemu-i386. early_printk function works after early_printk initialization.
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com> --- arch/x86/kernel/head32.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c index 2911ef3..dd0aadc 100644 --- a/arch/x86/kernel/head32.c +++ b/arch/x86/kernel/head32.c @@ -34,6 +34,9 @@ asmlinkage __visible void __init i386_start_kernel(void) cr4_init_shadow(); sanitize_boot_params(&boot_params); + /* setup earlyprintk as early as possible */ + setup_early_printk(boot_command_line); + /* Call the subarch specific early setup function */ switch (boot_params.hdr.hardware_subarch) { case X86_SUBARCH_INTEL_MID: -- 2.3.3.611.g09038fc.dirty
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