diff -u --recursive --new-file linux-2.4.9/lib/Makefile linux-2.4.9-atomic_lock/lib/Makefile
--- linux-2.4.9/lib/Makefile	Wed Apr 25 22:31:03 2001
+++ linux-2.4.9-atomic_lock/lib/Makefile	Fri Aug 17 12:38:24 2001
@@ -8,7 +8,7 @@
 
 L_TARGET := lib.a
 
-export-objs := cmdline.o rwsem-spinlock.o rwsem.o
+export-objs := cmdline.o dec_and_lock.o rwsem-spinlock.o rwsem.o
 
 obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o
 
diff -u --recursive --new-file linux-2.4.9/lib/dec_and_lock.c linux-2.4.9-atomic_lock/lib/dec_and_lock.c
--- linux-2.4.9/lib/dec_and_lock.c	Sat Jul  8 01:22:48 2000
+++ linux-2.4.9-atomic_lock/lib/dec_and_lock.c	Fri Aug 17 12:22:49 2001
@@ -1,3 +1,4 @@
+#include <linux/module.h>
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
@@ -34,4 +35,6 @@
 	spin_unlock(lock);
 	return 0;
 }
+
+EXPORT_SYMBOL(atomic_dec_and_lock);
 #endif