移植文件系统时，我们可能会遇到这个问题：
VFS: Mounted root (cramfs filesystem) readonly on device 31:3.
Freeing unused kernel memory: 176K (c0616000 - c0642000)
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
CPU: 0 PID: 1 Comm: sh Not tainted 3.16.1-svn57 #5
[<c011b0e8>] (unwind_backtrace) from [<c0118978>] (show_stack+0x10/0x14)
[<c0118978>] (show_stack) from [<c04d5898>] (panic+0x80/0x1f4)
[<c04d5898>] (panic) from [<c0126954>] (do_exit+0x77c/0x88c)
[<c0126954>] (do_exit) from [<c0126aac>] (do_group_exit+0x48/0xb0)
[<c0126aac>] (do_group_exit) from [<c0132428>] (get_signal_to_deliver+0x22c/0x4dc)
[<c0132428>] (get_signal_to_deliver) from [<c0117cf4>] (do_work_pending+0xc8/0x444)
[<c0117cf4>] (do_work_pending) from [<c01157bc>] (work_pending+0xc/0x20)
---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
[<c0132428>] (get_signal_to_deliver) from [<c0117cf4>] (do_work_pending+0xc8/0x444)
[<c0117cf4>] (do_work_pending) from [<c01157bc>] (work_pending+0xc/0x20)
---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
原文地址：http://blog.csdn.net/xiangpingli/article/details/38884905
