Prefer using kmalloc_array(a, b) over kmalloc(a * b) as this
improves semantics since kmalloc is intended for allocating an
array of memory.
Signed-off-by: NKenneth Lee <klee33@uw.edu>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>