[Bug 8091] New: mount: mounting dev on /dev failed: device or resource busy

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=8091

           Summary: mount: mounting dev on /dev failed: device or resource
                    busy
           Product: Busybox
           Version: 1.21.x
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
        AssignedTo: unassigned at busybox.net
        ReportedBy: linuxcbon at gmail.com
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


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

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