[IA64] Remove warnings for gcc 4.0 IA64 compilation.

This patch removes some compilation warnings, mostly
trivially. acpi.c fix also noted by Kenji Kaneshige.

Signed-off-by; Peter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/acpi.c

@@ -899,7 +899,7 @@ int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 	if ((err = iosapic_init(phys_addr, gsi_base)))
 		return err;
 
-#if CONFIG_ACPI_NUMA
+#ifdef CONFIG_ACPI_NUMA
 	acpi_map_iosapic(handle, 0, NULL, NULL);
 #endif				/* CONFIG_ACPI_NUMA */
 

arch/ia64/kernel/entry.S

@@ -491,7 +491,7 @@ GLOBAL_ENTRY(prefetch_stack)
 	;;
 	lfetch.fault [r16], 128
 	br.ret.sptk.many rp
-END(prefetch_switch_stack)
+END(prefetch_stack)
 
 GLOBAL_ENTRY(execve)
 	mov r15=__NR_execve			// put syscall number in place

arch/ia64/kernel/perfmon.c

@@ -574,7 +574,7 @@ pfm_protect_ctx_ctxsw(pfm_context_t *x)
 	return 0UL;
 }
 
-static inline unsigned long
+static inline void
 pfm_unprotect_ctx_ctxsw(pfm_context_t *x, unsigned long f)
 {
 	spin_unlock(&(x)->ctx_lock);

drivers/char/agp/hp-agp.c

@@ -252,7 +252,7 @@ hp_zx1_configure (void)
 		readl(hp->ioc_regs+HP_ZX1_PDIR_BASE);
 		writel(hp->io_tlb_ps, hp->ioc_regs+HP_ZX1_TCNFG);
 		readl(hp->ioc_regs+HP_ZX1_TCNFG);
-		writel(~(HP_ZX1_IOVA_SIZE-1), hp->ioc_regs+HP_ZX1_IMASK);
+		writel((unsigned int)(~(HP_ZX1_IOVA_SIZE-1)), hp->ioc_regs+HP_ZX1_IMASK);
 		readl(hp->ioc_regs+HP_ZX1_IMASK);
 		writel(hp->iova_base|1, hp->ioc_regs+HP_ZX1_IBASE);
 		readl(hp->ioc_regs+HP_ZX1_IBASE);