Ocfs2/move_extents: Avoid doing division in extent moving.
Ocfs2/move_extents: Avoid doing division in extent moving.

It's not wise enough to do a 64bits division anywhere in kernside, replace it
with a decent helper or proper shifts.

Signed-off-by: Tristan Ye <1c61ece1e0e3e7d92a41e9a901fc3956c7c63903@oracle.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas