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Commit f7887ee1 authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Richard Weinberger
Browse files

um: Add os_info() for pre-boot information messages 



Add os_info() for printing out pre-boot information
level messages in stderr. The messages via os_info()
are suppressed by "quiet" kernel command line.

Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent e03c78ac

arch/um/include/shared/os.h

+2 −0
Original line number Diff line number Diff line
@@ -242,6 +242,8 @@ extern void setup_hostinfo(char *buf, int len); 
extern void os_dump_core(void) __attribute__ ((noreturn));

extern void um_early_printk(const char *s, unsigned int n);

extern void os_fix_helper_signals(void);

extern void os_info(const char *fmt, ...)

	__attribute__ ((format (printf, 1, 2)));



/* time.c */

extern void os_idle_sleep(unsigned long long nsecs);

arch/um/os-Linux/util.c

+25 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <wait.h>

#include <sys/mman.h>

#include <sys/utsname.h>

#include <init.h>

#include <os.h>



void stack_protections(unsigned long address)
@@ -152,3 +153,27 @@ void um_early_printk(const char *s, unsigned int n) 
{

	printf("%.*s", n, s);

}



static int quiet_info;



static int __init quiet_cmd_param(char *str, int *add)

{

	quiet_info = 1;

	return 0;

}



__uml_setup("quiet", quiet_cmd_param,

"quiet\n"

"    Turns off information messages during boot.\n\n");



void os_info(const char *fmt, ...)

{

	va_list list;



	if (quiet_info)

		return;



	va_start(list, fmt);

	vfprintf(stderr, fmt, list);

	va_end(list);

}