===== arch/ppc/mm/pgtable.c 1.7 vs edited =====
--- 1.7/arch/ppc/mm/pgtable.c	Sun Nov  4 18:54:46 2001
+++ edited/arch/ppc/mm/pgtable.c	Fri Nov 16 15:12:48 2001
@@ -242,7 +242,7 @@
 	/*
 	 * Use a BAT for this if possible...
 	 */
-	if (io_bat_index < 2 && is_power_of_2(size)
+	if (io_bat_index < 2 && is_power_of_2(size) && size >= 0x20000
 	    && (virt & (size - 1)) == 0 && (phys & (size - 1)) == 0) {
 		setbat(io_bat_index, virt, phys, size, flags);
 		++io_bat_index;