diff -urN --exclude-from=/home/davej/.exclude linux-2.4.15pre6/arch/i386/config.in linux-ac/arch/i386/config.in
--- linux-2.4.15pre6/arch/i386/config.in	Mon Nov 19 13:40:53 2001
+++ linux-ac/arch/i386/config.in	Mon Nov 19 14:09:18 2001
@@ -52,6 +55,7 @@
    define_int  CONFIG_X86_L1_CACHE_SHIFT 4
    define_bool CONFIG_RWSEM_GENERIC_SPINLOCK y
    define_bool CONFIG_RWSEM_XCHGADD_ALGORITHM n
+   define_bool CONFIG_X86_PPRO_FENCE y
 else
    define_bool CONFIG_X86_WP_WORKS_OK y
    define_bool CONFIG_X86_INVLPG y
@@ -66,17 +70,20 @@
    define_int  CONFIG_X86_L1_CACHE_SHIFT 4
    define_bool CONFIG_X86_USE_STRING_486 y
    define_bool CONFIG_X86_ALIGNMENT_16 y
+   define_bool CONFIG_X86_PPRO_FENCE y
 fi
 if [ "$CONFIG_M586" = "y" ]; then
    define_int  CONFIG_X86_L1_CACHE_SHIFT 5
    define_bool CONFIG_X86_USE_STRING_486 y
    define_bool CONFIG_X86_ALIGNMENT_16 y
+   define_bool CONFIG_X86_PPRO_FENCE y
 fi
 if [ "$CONFIG_M586TSC" = "y" ]; then
    define_int  CONFIG_X86_L1_CACHE_SHIFT 5
    define_bool CONFIG_X86_USE_STRING_486 y
    define_bool CONFIG_X86_ALIGNMENT_16 y
    define_bool CONFIG_X86_TSC y
+   define_bool CONFIG_X86_PPRO_FENCE y
 fi
 if [ "$CONFIG_M586MMX" = "y" ]; then
    define_int  CONFIG_X86_L1_CACHE_SHIFT 5
@@ -84,6 +91,7 @@
    define_bool CONFIG_X86_ALIGNMENT_16 y
    define_bool CONFIG_X86_TSC y
    define_bool CONFIG_X86_GOOD_APIC y
+   define_bool CONFIG_X86_PPRO_FENCE y
 fi
 if [ "$CONFIG_M686" = "y" ]; then
    define_int  CONFIG_X86_L1_CACHE_SHIFT 5
@@ -91,6 +99,7 @@
    define_bool CONFIG_X86_GOOD_APIC y
    define_bool CONFIG_X86_PGE y
    define_bool CONFIG_X86_USE_PPRO_CHECKSUM y
+   define_bool CONFIG_X86_PPRO_FENCE y
 fi
 if [ "$CONFIG_MPENTIUMIII" = "y" ]; then
    define_int  CONFIG_X86_L1_CACHE_SHIFT 5