diff -ru blcr-0.8.2.orig/configure.ac blcr-0.8.2/configure.ac
--- blcr-0.8.2.orig/configure.ac	2010-03-08 21:48:09.865618000 +0000
+++ blcr-0.8.2/configure.ac	2010-03-08 21:45:30.784618000 +0000
@@ -1004,7 +1004,7 @@
 fi
 
 # put_task_struct() requires one of these:
-CR_FIND_KSYM([__put_task_struct],[CODE])
+CR_FIND_KSYM([__put_task_struct],[CODE],[extern void __put_task_struct(struct task_struct *);])
 CR_FIND_KSYM([__put_task_struct_cb],[CODE])
 
 CR_CHECK_KERNEL_MEMBER([mm.task_size],[#include <linux/sched.h>],
diff -ru blcr-0.8.2.orig/cr_module/cr_kcompat.h blcr-0.8.2/cr_module/cr_kcompat.h
--- blcr-0.8.2.orig/cr_module/cr_kcompat.h	2010-03-08 21:48:09.821618000 +0000
+++ blcr-0.8.2/cr_module/cr_kcompat.h	2010-03-08 21:46:33.455618000 +0000
@@ -584,4 +584,9 @@
   #error "no cr_do_pipe() definition"
 #endif
 
+#if !defined(DECLARE_MUTEX)
+  #define DECLARE_MUTEX(m) DEFINE_SEMAPHORE(m)
+  #define init_MUTEX(m) sema_init(m, 1)
+#endif
+
 #endif /* _CR_KCOMPAT_H */