Revert "Next try to update sl[auo]b from faux123"

This reverts commit 3b0ae98d41d49989a23bfb2e0939bd3680c8534a.
Revert "Forget to update include/linux/slab*.h"

This reverts commit 6ce93a7ade019ce59ec51027e1907debf4bf60a2.
Revert "Forget to add slab_common.c to makefile"

This reverts commit d91e78bc832f72e99390f8c0ba52eeb84dd5530d.
Revert "Update to sl[aou]b from faux123"

This reverts commit ae691cf95f1262d1cba2323ec85e1e09f80a3ecd.