Remove memset zero valued and use kzalloc. This type of construction can be an order of magnitude faster.
Revert "Remove memset zero valued and use kzalloc. This type of construction can be an order of magnitude faster."

This reverts commit 5998dac7b85c4d02e0e817ad993a1c379d128e9f.
Use kzalloc that is orderof magnitude faster and remove memset(0).