Why ctime and mtime of each files under "/dev" are updated on every reboot ?

Issue

• After every reboot time stamp of all files under /dev/all-sub-dirs changes.

  • Can a reboot change the timestamp of all the devices in /dev file-system ?
  • Is there any script which is active at the time of reboot which probably causes above change in timestamp?

• Before Reboot

/dev/vgroot:
total 0
lrwxrwxrwx 1 root root 23 Jan 27 15:34 home -> /dev/mapper/vgroot-home
lrwxrwxrwx 1 root root 25 Jan 27 15:34 homesa -> /dev/mapper/vgroot-homesa
lrwxrwxrwx 1 root root 24 Jan 27 15:34 local -> /dev/mapper/vgroot-local
lrwxrwxrwx 1 root root 22 Jan 27 15:34 opt -> /dev/mapper/vgroot-opt
lrwxrwxrwx 1 root root 23 Jan 27 15:34 root -> /dev/mapper/vgroot-root
lrwxrwxrwx 1 root root 23 Jan 27 15:34 swap -> /dev/mapper/vgroot-swap
lrwxrwxrwx 1 root root 22 Jan 27 15:34 tmp -> /dev/mapper/vgroot-tmp
lrwxrwxrwx 1 root root 22 Jan 27 15:34 usr -> /dev/mapper/vgroot-usr
lrwxrwxrwx 1 root root 22 Jan 27 15:34 var -> /dev/mapper/vgroot-var

• After Reboot

/dev/vgroot:
total 0
lrwxrwxrwx 1 root root 23 Jan 28 17:16 home -> /dev/mapper/vgroot-home
lrwxrwxrwx 1 root root 25 Jan 28 17:16 homesa -> /dev/mapper/vgroot-homesa
lrwxrwxrwx 1 root root 24 Jan 28 17:16 local -> /dev/mapper/vgroot-local
lrwxrwxrwx 1 root root 22 Jan 28 17:16 opt -> /dev/mapper/vgroot-opt
lrwxrwxrwx 1 root root 23 Jan 28 17:16 root -> /dev/mapper/vgroot-root
lrwxrwxrwx 1 root root 23 Jan 28 17:16 swap -> /dev/mapper/vgroot-swap
lrwxrwxrwx 1 root root 22 Jan 28 17:16 tmp -> /dev/mapper/vgroot-tmp
lrwxrwxrwx 1 root root 22 Jan 28 17:16 usr -> /dev/mapper/vgroot-usr
lrwxrwxrwx 1 root root 22 Jan 28 17:16 var -> /dev/mapper/vgroot-var