I didn't checked ac5 but this is how I fixed the UP compile problem of 4pre2:
--- 2.4.4pre2aa/include/asm-i386/rwsem.h.~1~ Thu Apr 12 17:25:24 2001
+++ 2.4.4pre2aa/include/asm-i386/rwsem.h Thu Apr 12 17:38:10 2001
@@ -17,7 +17,7 @@
#include <asm/system.h>
#include <asm/atomic.h>
-#include <asm/spinlock.h>
+#include <linux/spinlock.h>
#include <linux/wait.h>
#if RWSEM_DEBUG
Andrea
-
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