From: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> Date: Sat, 27 Jan 2007 12:17:53 +0100 (MET) > > >Looking at init/main.c: > > > >if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) > > printk(KERN_WARNING "Warning: unable to open an initial console.\n"); > > That looks almost like a bug :-/ > "/dev/console" will decay into a pointer to kernel space, but > sys_open takes a userspace one. The __user annotation does not > change that. Try adding this: > > >... so, if root is mounted (over nfs), and root is mounted rw, > >and /dev/console exists on the nfsroot, and it has rw permissions (I > >gave it chmod 777 to just be sure), why would that sys_open call fail > >and trigger that printk? > > int ret = sys_open((const char __user *)"/dev/console", O_RDWR, 0); > if(ret < 0) > printk(KERN_WARNING "Warning: unable to open an " > "initial console (%d)\n", ret); > > I wonder what return code it will give (-EFAULT is my guess). It's not getting -EFAULT, the init task runs with set_fs(KERNEL_DS). It's getting -ENOENT because no console device has registered itself, and therefore even if you have a /dev/console node in the filesystem the open will still fail. - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
