Revert "locking, percpu_counter: Annotate ::lock as raw"

This reverts commit ae6e03e00e429d84a4bd5eb8bf2d8f0e3139d179.
Revert "readahead: fault retry breaks mmap file read random detection"

This reverts commit 57908f637e05561af6e52e258f55d8c0fc2f091d.