tree 422ea77709dc782164d7c09a9cc3a0593a7a4fc9
parent 09689703d29a3b75c510c198c3aca85d7d8b50c7
author Jason Gunthorpe <jgg@mellanox.com> 1570637375 -0300
committer Jason Gunthorpe <jgg@mellanox.com> 1572291674 -0300

RDMA/odp: Remove broken debugging call to invalidate_range

invalidate_range() also obtains the umem_mutex which is being held at this
point, so if this path were was ever called it would deadlock. Thus
conclude the debugging never triggers and rework it into a simple WARN_ON
and leave things as they are.

While here add a note to explain how we could possibly get inconsistent
page pointers.

Link: https://lore.kernel.org/r/20191009160934.3143-16-jgg@ziepe.ca
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>