[IA64] Hook up getcpu system call for IA64

getcpu system call returns cpu# and node# on which this system call and
its caller are running. This patch hooks up its implementation on IA64.
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

arch/ia64/kernel/entry.S

@@ -1610,5 +1610,7 @@ sys_call_table:
 	data8 sys_sync_file_range		// 1300
 	data8 sys_tee
 	data8 sys_vmsplice
+	data8 sys_ni_syscall			// reserved for move_pages
+	data8 sys_getcpu
 
 	.org sys_call_table + 8*NR_syscalls	// guard against failures to increase NR_syscalls

include/asm-ia64/unistd.h

@@ -291,11 +291,13 @@
 #define __NR_sync_file_range		1300
 #define __NR_tee			1301
 #define __NR_vmsplice			1302
+/* 1303 reserved for move_pages */
+#define __NR_getcpu			1304
 
 #ifdef __KERNEL__
 
 
-#define NR_syscalls			279 /* length of syscall table */
+#define NR_syscalls			281 /* length of syscall table */
 
 #define __ARCH_WANT_SYS_RT_SIGACTION