Why the following codes in do_basic_setup() are always executed ?

Liu HongXun-a16975 a16975 at motorola.com
Wed Apr 11 12:56:50 EST 2001

Hi, all,
	Currently, I am porting HardHat linux 2.2.14 to my platform based on ppc823.
The bootloader is ppcboot(0.8.3), and I use ramdisk. But when I boot linux on my board,
 the following codes in do_basic_setup() are always executed and my board halt.

	root_mountflags = real_root_mountflags;
	if (mount_initrd && ROOT_DEV != real_root_dev
		int error;
		int i, pid;

		pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
		if (pid>0)
			while (pid != wait(&i));
		if (MAJOR(real_root_dev) != RAMDISK_MAJOR
		     || MINOR(real_root_dev) != 0) {
			error = change_root(real_root_dev,"/initrd");
			if (error)
				printk(KERN_ERR "Change root to /initrd: "
				    "error %d\n",error);

I know the halt is caused by this line "kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD)",
because there is no "/linuxrc" in my ramdisk. I just wonder why the above codes are executed.
Such codes are in do_basic_setup() in /init/main.c, and after that we will execute "/sbin/init" or
just "/bin/sash", which are the usual ones.

Rolf Liu

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