--- 2.4/include/linux/bitops.h	Sat Apr 28 00:48:19 2001
+++ build-2.4/include/linux/bitops.h	Tue Jun  5 19:40:43 2001
@@ -68,5 +68,27 @@
 
 #include <asm/bitops.h>
 
+#ifdef __KERNEL__
+#include <linux/types.h>
+#define BUILD_SET_BIT(n) \
+static inline void __set_bit_##n(int offset, u##n *data) \
+{ \
+	data[offset/n] |= (1 << (offset%n)); \
+}
+
+#ifndef _HAVE_ARCH_SET_BIT_8
+BUILD_SET_BIT(8)
+#endif
+#ifndef _HAVE_ARCH_SET_BIT_16
+BUILD_SET_BIT(16)
+#endif
+#ifndef _HAVE_ARCH_SET_BIT_32
+BUILD_SET_BIT(32)
+#endif
+#ifndef _HAVE_ARCH_SET_BIT_64
+BUILD_SET_BIT(64)
+#endif
+#undef BUILD_SET_BIT
+#endif
 
 #endif