[IA64] silence GCC ia64 unused variable warnings

Tell GCC to stop spewing out unnecessary warnings for unused variables
passed to functions as pointers for ia64 files.
Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/process.c

@@ -513,7 +513,8 @@ copy_thread (int nr, unsigned long clone_flags,
 static void
 do_copy_task_regs (struct task_struct *task, struct unw_frame_info *info, void *arg)
 {
-	unsigned long mask, sp, nat_bits = 0, ip, ar_rnat, urbs_end, cfm;
+	unsigned long mask, sp, nat_bits = 0, ar_rnat, urbs_end, cfm;
+	unsigned long uninitialized_var(ip);	/* GCC be quiet */
 	elf_greg_t *dst = arg;
 	struct pt_regs *pt;
 	char nat;

arch/ia64/mm/tlb.c

@@ -175,7 +175,7 @@ EXPORT_SYMBOL(flush_tlb_range);
 void __devinit
 ia64_tlb_init (void)
 {
-	ia64_ptce_info_t ptce_info;
+	ia64_ptce_info_t uninitialized_var(ptce_info); /* GCC be quiet */
 	unsigned long tr_pgbits;
 	long status;
 

arch/ia64/sn/kernel/tiocx.c

@@ -369,7 +369,7 @@ static void tio_corelet_reset(nasid_t nasid, int corelet)
 
 static int is_fpga_tio(int nasid, int *bt)
 {
-	u16 ioboard_type;
+	u16 uninitialized_var(ioboard_type);	/* GCC be quiet */
 	s64 rc;
 
 	rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard_type);

arch/ia64/sn/pci/pcibr/pcibr_provider.c

@@ -80,7 +80,7 @@ static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
 u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
 {
 	s64 rc;
-	u16 ioboard;
+	u16 uninitialized_var(ioboard);		/* GCC be quiet */
 	nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 
 	rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);