x86 always seems to include asm/page.h, PPC (and presumably others) don't.
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .22822-2.5.45-bk-module-ppc.pre/include/linux/smp.h .22822-2.5.45-bk-module-ppc/include/linux/smp.h
--- .22822-2.5.45-bk-module-ppc.pre/include/linux/smp.h 2002-10-15 15:19:44.000000000 +1000
+++ .22822-2.5.45-bk-module-ppc/include/linux/smp.h 2002-11-04 18:28:52.000000000 +1100
@@ -79,6 +79,7 @@ extern void unregister_cpu_notifier(stru
int cpu_up(unsigned int cpu);
#else /* !SMP */
+#include <asm/page.h> /* For BUG() */
/*
* These macros fold the SMP functionality into a single CPU system
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This archive was generated by hypermail 2b29 : Thu Nov 07 2002 - 22:00:32 EST