--- linux-work/kernel/module.c-RCUMOD	Tue Nov 27 22:58:19 2001
+++ linux-work/kernel/module.c	Mon Jan  7 16:37:54 2002
@@ -4,6 +4,7 @@
 #include <asm/module.h>
 #include <asm/uaccess.h>
 #include <linux/vmalloc.h>
+#include <linux/rcupdate.h>
 #include <linux/smp_lock.h>
 #include <asm/pgalloc.h>
 #include <linux/init.h>
@@ -1065,6 +1066,12 @@
 		p->next = mod->next;
 	}
 	spin_unlock_irqrestore(&modlist_lock, flags);
+
+	/* Wait for all other cpus to go through a context switch. This
+	 * doesn't plug all module unload races, but at least some of
+	 * them and makes the window much smaller.  
+	 */
+	synchronize_kernel(); 
 
 	/* And free the memory.  */