kernel: Update to 3.2.45.

Also fix compilation of compat-drivers.

src/patches/compat-drivers-3.8-1-u-kref_get_unless_zero.patch

@@ -0,0 +1,38 @@
+--- compat-drivers-3.8-1-u/include/linux/compat-3.8.h.orig	2013-05-16 20:35:27.046386772 +0200
++++ compat-drivers-3.8-1-u/include/linux/compat-3.8.h	2013-05-16 20:35:39.219767618 +0200
+@@ -24,35 +24,6 @@
+ 
+ /* This backports:
+  *
+- * commit 4b20db3de8dab005b07c74161cb041db8c5ff3a7
+- * Author: Thomas Hellstrom <thellstrom@vmware.com>
+- * Date:   Tue Nov 6 11:31:49 2012 +0000
+- *
+- *	kref: Implement kref_get_unless_zero v3
+- */
+-/**
+- * kref_get_unless_zero - Increment refcount for object unless it is zero.
+- * @kref: object.
+- *
+- * Return non-zero if the increment succeeded. Otherwise return 0.
+- *
+- * This function is intended to simplify locking around refcounting for
+- * objects that can be looked up from a lookup structure, and which are
+- * removed from that lookup structure in the object destructor.
+- * Operations on such objects require at least a read lock around
+- * lookup + kref_get, and a write lock around kref_put + remove from lookup
+- * structure. Furthermore, RCU implementations become extremely tricky.
+- * With a lookup followed by a kref_get_unless_zero *with return value check*
+- * locking in the kref_put path can be deferred to the actual removal from
+- * the lookup structure and RCU lookups become trivial.
+- */
+-static inline int __must_check kref_get_unless_zero(struct kref *kref)
+-{
+-	return atomic_add_unless(&kref->refcount, 1, 0);
+-}
+-
+-/* This backports:
+- *
+  * commit 83e68189745ad931c2afd45d8ee3303929233e7f
+  * Author: Matt Fleming <matt.fleming@intel.com>
+  * Date:   Wed Nov 14 09:42:35 2012 +0000