/* * When in kernel-mode, we cannot use printf, as fs is liable to * point to 'interesting' things. Make a printf with fs-saving, and * all is well. */#include <stdarg.h>#include <stddef.h>#include <linux/kernel.h>static char buf[1024];int printk(const char *fmt, ...){	va_list args;	int i;	va_start(args, fmt);	i=vsprintf(buf,fmt,args);	va_end(args);	__asm__("push %%fs\n\t"		"push %%ds\n\t"		"pop %%fs\n\t"		"pushl %0\n\t"		"pushl $buf\n\t"		"pushl $0\n\t"		"call tty_write\n\t"		"addl $8,%%esp\n\t"		"popl %0\n\t"		"pop %%fs"		::"r" (i):"ax","cx","dx");	return i;}