diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py
index f9440891d048a60a574c925d0fc61cb3c94d0017..e9cc689033fe8f0edb696003845cd00872fe0ff2 100644
--- a/scripts/checkkconfigsymbols.py
+++ b/scripts/checkkconfigsymbols.py
@@ -1,36 +1,31 @@
 #!/usr/bin/env python
 
-"""Find Kconfig identifieres that are referenced but not defined."""
+"""Find Kconfig identifiers that are referenced but not defined."""
 
-# Copyright (C) 2014 Valentin Rothberg <valentinrothberg@gmail.com>
-# Copyright (C) 2014 Stefan Hengelein <stefan.hengelein@fau.de>
+# (c) 2014 Valentin Rothberg <valentinrothberg@gmail.com>
+# (c) 2014 Stefan Hengelein <stefan.hengelein@fau.de>
 #
-# This program is free software; you can redistribute it and/or modify it
-# under the terms and conditions of the GNU General Public License,
-# version 2, as published by the Free Software Foundation.
-#
-# This program is distributed in the hope it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-# more details.
+# Licensed under the terms of the GNU GPL License version 2
 
 
 import os
 import re
 from subprocess import Popen, PIPE, STDOUT
 
-# REGEX EXPRESSIONS
+
+# regex expressions
 OPERATORS = r"&|\(|\)|\||\!"
-FEATURE = r"\w*[A-Z]{1}\w*"
-CONFIG_DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
+FEATURE = r"(?:\w*[A-Z0-9]\w*){2,}"
+DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
 EXPR = r"(?:" + OPERATORS + r"|\s|" + FEATURE + r")+"
 STMT = r"^\s*(?:if|select|depends\s+on)\s+" + EXPR
+SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
 
-# REGEX OBJECTS
+# regex objects
 REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
 REGEX_FEATURE = re.compile(r"(" + FEATURE + r")")
-REGEX_SOURCE_FEATURE = re.compile(r"(?:D|\W|\b)+CONFIG_(" + FEATURE + r")")
-REGEX_KCONFIG_DEF = re.compile(CONFIG_DEF)
+REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
+REGEX_KCONFIG_DEF = re.compile(DEF)
 REGEX_KCONFIG_EXPR = re.compile(EXPR)
 REGEX_KCONFIG_STMT = re.compile(STMT)
 REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
@@ -42,7 +37,7 @@ def main():
     source_files = []
     kconfig_files = []
     defined_features = set()
-    referenced_features = dict()
+    referenced_features = dict()  # {feature: [files]}
 
     # use 'git ls-files' to get the worklist
     pop = Popen("git ls-files", stdout=PIPE, stderr=STDOUT, shell=True)
@@ -52,12 +47,12 @@ def main():
 
     for gitfile in stdout.rsplit("\n"):
         if ".git" in gitfile or "ChangeLog" in gitfile or \
-                os.path.isdir(gitfile):
+                ".log" in gitfile or os.path.isdir(gitfile):
             continue
         if REGEX_FILE_KCONFIG.match(gitfile):
             kconfig_files.append(gitfile)
         else:
-            # All non-Kconfig files are checked for consistency
+            # all non-Kconfig files are checked for consistency
             source_files.append(gitfile)
 
     for sfile in source_files:
@@ -68,15 +63,17 @@ def main():
 
     print "Undefined symbol used\tFile list"
     for feature in sorted(referenced_features):
+        # filter some false positives
+        if feature == "FOO" or feature == "BAR" or \
+                feature == "FOO_BAR" or feature == "XXX":
+            continue
         if feature not in defined_features:
             if feature.endswith("_MODULE"):
-                # Avoid false positives for kernel modules
+                # avoid false positives for kernel modules
                 if feature[:-len("_MODULE")] in defined_features:
                     continue
-            if "FOO" in feature or "BAR" in feature:
-                continue
             files = referenced_features.get(feature)
-            print "%s:\t%s" % (feature, ", ".join(files))
+            print "%s\t%s" % (feature, ", ".join(files))
 
 
 def parse_source_file(sfile, referenced_features):
@@ -92,9 +89,9 @@ def parse_source_file(sfile, referenced_features):
         for feature in features:
             if not REGEX_FILTER_FEATURES.search(feature):
                 continue
-            paths = referenced_features.get(feature, set())
-            paths.add(sfile)
-            referenced_features[feature] = paths
+            sfiles = referenced_features.get(feature, set())
+            sfiles.add(sfile)
+            referenced_features[feature] = sfiles
 
 
 def get_features_in_line(line):
@@ -113,7 +110,7 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
     for i in range(len(lines)):
         line = lines[i]
         line = line.strip('\n')
-        line = line.split("#")[0]  # Ignore Kconfig comments
+        line = line.split("#")[0]  # ignore comments
 
         if REGEX_KCONFIG_DEF.match(line):
             feature_def = REGEX_KCONFIG_DEF.findall(line)
@@ -122,11 +119,11 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
         elif REGEX_KCONFIG_HELP.match(line):
             skip = True
         elif skip:
-            # Ignore content of help messages
+            # ignore content of help messages
             pass
         elif REGEX_KCONFIG_STMT.match(line):
             features = get_features_in_line(line)
-            # Multi-line statements
+            # multi-line statements
             while line.endswith("\\"):
                 i += 1
                 line = lines[i]