Here's a change that Niels Kristian Bech Jensen posted for 2.1.81, which
was not applied in 2.1.82.
--- linux/arch/i386/kernel/i386_ksyms.c.orig Mon Jan 26 19:44:27 1998
+++ linux/arch/i386/kernel/i386_ksyms.c Mon Jan 26 20:11:13 1998
@@ -72,6 +72,9 @@
EXPORT_SYMBOL(lk_lockmsg);
/* Global SMP irq stuff */
+EXPORT_SYMBOL(synchronize_bh);
+EXPORT_SYMBOL(global_bh_count);
+EXPORT_SYMBOL(global_bh_lock);
EXPORT_SYMBOL(synchronize_irq);
EXPORT_SYMBOL(synchronize_bh);
EXPORT_SYMBOL(global_bh_lock);