[PATCH v9 2/3] kernel.h: add to_user_ptr()

[Joe Perches]

On Thu, 2016-03-17 at 14:30 -0300, Gustavo Padovan wrote:
> This function had copies in 3 different files. Unify them in
> kernel.h.

This is only used by gpu/drm.

I think this is a poor name for a generic function
that would be in kernel.h.

Isn't there an include file in linux/drm that's
appropriate for this.  Maybe drmP.h

Maybe prefix this function name with drm_ too.

Also, there's this that might conflict:

arch/powerpc/kernel/signal_32.c:#define to_user_ptr(p)          ptr_to_compat(p)
arch/powerpc/kernel/signal_32.c:#define to_user_ptr(p)          ((unsigned long)(p))