== static check against sys ==
PASS  linux/shrinker.h shim has NO register_shrinker (struct-only: 3 decl(s))
PASS  no OOM/vmap notifier registration exists in the shim either
PASS  i915 registration of shrinker/oom/vmap notifiers is #if 0'd out
PASS  i915_gem_shrinker_count body is #if 0 (returns 0)
PASS  i915_gem_shrinker_scan body is #if 0 (returns 0)
PASS  vm_lowmem is never EVENTHANDLER_INVOKE'd anywhere in sys/ (0 sites)
note: live i915_gem_shrink callers (explicit only):
      sys/dev/drm/i915/i915_gem.c:2935:			i915_gem_shrink(dev_priv, 2 * page_count, NULL, *s++);
      sys/dev/drm/i915/i915_gem.c:6353:	i915_gem_shrink(i915, -1UL, NULL, I915_SHRINK_UNBOUND);
      sys/dev/drm/i915/i915_gem_gtt.c:2449:	} while (i915_gem_shrink(to_i915(obj->base.dev),