diff --git a/nmigen/_utils.py b/nmigen/_utils.py
index 85c8cdb..6168ea1 100644
--- a/nmigen/_utils.py
+++ b/nmigen/_utils.py
@@ -1,6 +1,8 @@
 import contextlib
 import functools
 import warnings
+import linecache
+import re
 from collections import OrderedDict
 from collections.abc import Iterable
 from contextlib import contextmanager
@@ -8,7 +10,8 @@ from contextlib import contextmanager
 from .utils import *
 
 
-__all__ = ["flatten", "union" , "log2_int", "bits_for", "memoize", "final", "deprecated"]
+__all__ = ["flatten", "union" , "log2_int", "bits_for", "memoize", "final", "deprecated",
+           "get_linter_options", "get_linter_option"]
 
 
 def flatten(i):
@@ -82,3 +85,32 @@ def extend(cls):
             name = f.__name__
         setattr(cls, name, f)
     return decorator
+
+
+def get_linter_options(filename):
+    first_line = linecache.getline(filename, 1)
+    if first_line:
+        match = re.match(r"^#\s*nmigen:\s*((?:\w+=\w+\s*)(?:,\s*\w+=\w+\s*)*)\n$", first_line)
+        if match:
+            return dict(map(lambda s: s.strip().split("=", 2), match.group(1).split(",")))
+    return dict()
+
+
+def get_linter_option(filename, name, type, default):
+    options = get_linter_options(filename)
+    if name not in options:
+        return default
+
+    option = options[name]
+    if type is bool:
+        if option in ("1", "yes", "enable"):
+            return True
+        if option in ("0", "no", "disable"):
+            return False
+        return default
+    if type is int:
+        try:
+            return int(option, 0)
+        except ValueError:
+            return default
+    assert False
diff --git a/nmigen/hdl/ir.py b/nmigen/hdl/ir.py
index 44c3ecd..c213943 100644
--- a/nmigen/hdl/ir.py
+++ b/nmigen/hdl/ir.py
@@ -21,19 +21,24 @@ class Elaboratable(metaclass=ABCMeta):
     _Elaboratable__silence = False
 
     def __new__(cls, *args, src_loc_at=0, **kwargs):
+        frame = sys._getframe(1 + src_loc_at)
         self = super().__new__(cls)
-        self._Elaboratable__src_loc = traceback.extract_stack(limit=2 + src_loc_at)[0]
         self._Elaboratable__used    = False
+        self._Elaboratable__context = dict(
+            filename=frame.f_code.co_filename,
+            lineno=frame.f_lineno,
+            source=self)
         return self
 
     def __del__(self):
         if self._Elaboratable__silence:
             return
         if hasattr(self, "_Elaboratable__used") and not self._Elaboratable__used:
-            warnings.warn_explicit("{!r} created but never used".format(self), UnusedElaboratable,
-                                   filename=self._Elaboratable__src_loc.filename,
-                                   lineno=self._Elaboratable__src_loc.lineno,
-                                   source=self)
+            if get_linter_option(self._Elaboratable__context["filename"],
+                                 "UnusedElaboratable", bool, True):
+                warnings.warn_explicit(
+                    "{!r} created but never used".format(self), UnusedElaboratable,
+                    **self._Elaboratable__context)
 
 
 _old_excepthook = sys.excepthook