On Tue, 13 Mar 2018, Laurent Dufour wrote:

The speculative page fault handler which is run without holding the
mmap_sem is calling lru_cache_add_active_or_unevictable() but the vm_flags
is not guaranteed to remain constant.
Introducing __lru_cache_add_active_or_unevictable() which has the vma flags
value parameter instead of the vma pointer.

Signed-off-by: Laurent Dufour <redacted>

Acked-by: David Rientjes <rientjes@google.com>