Unable to compile 2.6.17.11 IA64 kernel

include/asm/mman.h: Assembler messages:
include/asm/mman.h:13: Error: Unknown opcode `int
ia64_map_check_rgn(unsigned long addr,unsigned
long len,'
include/asm/mman.h:14: Error: Unknown opcode `unsigned long
flags)'
make[1]: *** [arch/ia64/kernel/entry.o] Error 1
make: *** [arch/ia64/kernel] Error 2

-- 
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--- linux-2.6.17.11.ref/include/asm-ia64/mman.h	2006-08-23
23:16:33.000000000 +0200
+++ linux-2.6.17.11/include/asm-ia64/mman.h	2006-08-25
14:52:49.000000000 +0200
 -9,9
+9,11 
  */
 
 #ifdef __KERNEL__
+#if !defined(__ASSEMBLY__)
 #define arch_mmap_check	ia64_map_check_rgn
 int ia64_map_check_rgn(unsigned long addr, unsigned long
len,
 		unsigned long flags);
+#endif /* !__ASSEMBLY__ */
 #endif
 
 #include <asm-generic/mman.h>