As setup_earlyprintk 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.
Signed-off-by: Alexander Kuleshov <kuleshovm...@gmail.com>
---
arch/x86/kernel/early_printk.c | 4 +---
arch/x86/kernel/head64.c | 1 +
include/linux/printk.h | 1 +
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index a62536a..4b0577b 100644
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -329,7 +329,7 @@ static inline void early_console_register(struct console
*con, int keep_early)
register_console(early_console);
}
-static int __init setup_early_printk(char *buf)
+int __init setup_early_printk(char *buf)
{
int keep;
@@ -390,5 +390,3 @@ static int __init setup_early_printk(char *buf)
}
return 0;
}
-
-early_param("earlyprintk", setup_early_printk);
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index c4f8d46..0141de7 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -171,6 +171,7 @@ asmlinkage __visible void __init x86_64_start_kernel(char *
real_mode_data)
load_idt((const struct desc_ptr *)&idt_descr);
copy_bootdata(__va(real_mode_data));
+ setup_early_printk(boot_command_line);
/*
* Load microcode early on BSP.
diff --git a/include/linux/printk.h b/include/linux/printk.h
index baa3f97..47e3919 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -115,6 +115,7 @@ int no_printk(const char *fmt, ...)
#ifdef CONFIG_EARLY_PRINTK
extern asmlinkage __printf(1, 2)
void early_printk(const char *fmt, ...);
+int setup_early_printk(char *buf);
#else
static inline __printf(1, 2) __cold
void early_printk(const char *s, ...) { }
--
2.3.3.611.g09038fc.dirty
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