Bug 8091

Summary:	mount: mounting dev on /dev failed: device or resource busy
Product:	Busybox	Reporter:	linuxcbon
Component:	Other	Assignee:	unassigned
Status:	NEW ---
Severity:	normal	CC:	busybox-cvs
Priority:	P5
Version:	1.21.x
Target Milestone:	---
Hardware:	PC
OS:	Linux
Host:		Target:
Build:

Description linuxcbon 2015-05-06 22:14:07 UTC

Kernel 3.19.2

inittab 
::sysinit:/etc/rc.d/rc.sysinit
tty1::respawn:/sbin/getty 38400 tty1
tty2::respawn:/sbin/getty 38400 tty2
::ctrlaltdel:/sbin/reboot

/etc/rc.d/rc.sysinit
#!/bin/busybox ash
busybox mount -t devtmpfs dev /dev

At bootup /dev is empty. After the kernel is loaded I get this :
mount: mounting dev on /dev failed: device or resource busy
But /dev was created normally :
drwxr-xr-x  2 root root       60 May  6 23:39 bsg
drwxr-xr-x  3 root root       60 May  6 23:39 bus
crw-------  1 root root   5,   1 May  6 23:40 console
......

dmesg
[    3.523940] devtmpfs: mounted
[    3.524235] Freeing unused kernel memory: 796K (ffffffff816a3000 - ffffffff8176a000)
[    3.884091] Switched to clocksource tsc