From 60e21539d6d41f3791020e4b525c524adf33edcb Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Sat, 14 Mar 2015 00:18:04 -0400
Subject: [PATCH] Add a central kernel version number

---
 sumpy/tools.py   | 6 +++++-
 sumpy/version.py | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/sumpy/tools.py b/sumpy/tools.py
index f7ef6c1c..c9cd433f 100644
--- a/sumpy/tools.py
+++ b/sumpy/tools.py
@@ -200,11 +200,15 @@ class KernelCacheWrapper(object):
         from sumpy import code_cache, CACHING_ENABLED
 
         if CACHING_ENABLED:
+            from sumpy.version import SUMPY_KERNEL_VERSION
+
             import loopy.version
             cache_key = (
                     self.get_cache_key()
                     + tuple(sorted(kwargs.iteritems()))
-                    + (loopy.version.DATA_MODEL_VERSION,))
+                    + (loopy.version.DATA_MODEL_VERSION,
+                        SUMPY_KERNEL_VERSION,)
+                    )
 
             try:
                 result = code_cache[cache_key]
diff --git a/sumpy/version.py b/sumpy/version.py
index d311f19b..e0f86a84 100644
--- a/sumpy/version.py
+++ b/sumpy/version.py
@@ -24,3 +24,5 @@ THE SOFTWARE.
 VERSION = (2014, 1)
 VERSION_STATUS = "beta1"
 VERSION_TEXT = ".".join(str(x) for x in VERSION) + VERSION_STATUS
+
+SUMPY_KERNEL_VERSION = 1
-- 
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