On Mon, Feb 23, 2015 at 01:56:34PM -0800, Guenter Roeck wrote:

Guess there a philosophical difference in opinion if the architecture code
should (have to) provide copy_user_page() or not outside the architecture
code itself. After all, fs/dax.c _is_ the only user of this function outside
the architecture code.

Given that copy_user_page just is an optimized version of copy_page
all these architectures should just grab the trivial macro defintion
from the asm-generic version so that we could avoid this discussion.