From a5eb404b05f4771c6386057eae8045a8a4505ed0 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Mon, 21 Mar 2016 14:32:52 -0500
Subject: [PATCH] Add kernel cache invalidation mechanism

---
 sumpy/tools.py   | 4 +++-
 sumpy/version.py | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/sumpy/tools.py b/sumpy/tools.py
index f6c293be..d2a66c69 100644
--- a/sumpy/tools.py
+++ b/sumpy/tools.py
@@ -214,10 +214,12 @@ class KernelCacheWrapper(object):
 
         if CACHING_ENABLED:
             import loopy.version
+            from sumpy.version import KERNEL_VERSION
             cache_key = (
                     self.get_cache_key()
                     + tuple(sorted(six.iteritems(kwargs)))
-                    + (loopy.version.DATA_MODEL_VERSION,))
+                    + (loopy.version.DATA_MODEL_VERSION,)
+                    + (KERNEL_VERSION,))
 
             try:
                 result = code_cache[cache_key]
diff --git a/sumpy/version.py b/sumpy/version.py
index 6f6749a9..4765172e 100644
--- a/sumpy/version.py
+++ b/sumpy/version.py
@@ -24,3 +24,5 @@ THE SOFTWARE.
 VERSION = (2016, 1)
 VERSION_STATUS = "beta1"
 VERSION_TEXT = ".".join(str(x) for x in VERSION) + VERSION_STATUS
+
+KERNEL_VERSION = 2
-- 
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