uffd: do not treat VDSO pages as lazy

VDSO is just a few pages and they can be loaded directly rather than go
through userfaultfd to save some complexity on the lazy-pages daemon side.
Signed-off-by: Mike Rapoport <rapoport@il.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/include/vma.h

@@ -129,6 +129,7 @@ static inline bool vma_entry_can_be_lazy(VmaEntry *e)
 {
 	return ((e->flags & MAP_ANONYMOUS) &&
 		(e->flags & MAP_PRIVATE) &&
+		!(vma_entry_is(e, VMA_AREA_VDSO)) &&
 		!(vma_entry_is(e, VMA_AREA_VSYSCALL)));
 }