Re: [PATCH 6/7] powerpc/uaccess: Add unsafe_clear_user()

On Tue, Jun 15, 2021 at 06:41:02AM +0000, Christophe Leroy wrote:

Implement unsafe_clear_user() for powerpc.
It's a copy/paste of unsafe_copy_to_user() with value 0 as source.

It may be improved in a later patch by using 'dcbz' instruction
to zeroize full cache lines at once.

Please add this to common code insted of making it powerpc specific.