I'm studying device files and I've seen some mount points cannot accept the device file creation (if
nodev option is set).
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) ..... debugfs on /sys/kernel/debug type debugfs (rw,relatime)
I've tried to create a device file in
/sys/kernel/debug (the directory has been chosen only because it doesn't have the
nodev option) but the operation is not permitted. I don't understand the rationale behind it: why is the operation not possible?