David Rientjes wrote:

On Fri, 24 Jul 2015, Kirill A. Shutemov wrote:

quoted

sparse complains on each and every vm_flags_t initialization, even with
proper VM_* constants.

Do we really want to fix that?

To me it's too much pain and no gain. __nocast is not beneficial here.

And I'm not sure that vm_flags_t typedef was a good idea after all.
Originally, it was intended to become 64-bit one day, but four years later
it's still unsigned long. Plain unsigned long works fine for other bit
field.

What is special about vm_flags?

Maybe remove the __nocast until it's a different type?  Seems like all 
these sites would have to be audited when that happens anyway.