Convert ext4 to use unlocked_ioctl
Andi Kleen authored

I checked ext4_ioctl and it looked largely safe to not be used
without BKL.  So convert it over to unlocked_ioctl.
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
5cdd7b2d