[ARM SMP] Fix some sparse warnings in SMP code

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/smp.c

@@ -142,7 +142,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
 			ret = -EIO;
 	}
 
-	secondary_data.stack = 0;
+	secondary_data.stack = NULL;
 	secondary_data.pgdir = 0;
 
 	*pmd_offset(pgd, PHYS_OFFSET) = __pmd(0);
@@ -359,8 +359,8 @@ static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg)
  * You must not call this function with disabled interrupts, from a
  * hardware interrupt handler, nor from a bottom half handler.
  */
-int smp_call_function_on_cpu(void (*func)(void *info), void *info, int retry,
-                             int wait, cpumask_t callmap)
+static int smp_call_function_on_cpu(void (*func)(void *info), void *info,
+				    int retry, int wait, cpumask_t callmap)
 {
 	struct smp_call_struct data;
 	unsigned long timeout;

arch/arm/mach-realview/platsmp.c

@@ -32,7 +32,7 @@ static unsigned int __init get_core_count(void)
 {
 	unsigned int ncores;
 
-	ncores = __raw_readl(IO_ADDRESS(REALVIEW_MPCORE_SCU_BASE) + SCU_CONFIG);
+	ncores = __raw_readl(__io_address(REALVIEW_MPCORE_SCU_BASE) + SCU_CONFIG);
 
 	return (ncores & 0x03) + 1;
 }
@@ -133,12 +133,12 @@ static void __init poke_milo(void)
 #if 1
 #define REALVIEW_SYS_FLAGSS_OFFSET 0x30
 	__raw_writel(virt_to_phys(realview_secondary_startup),
-		     (IO_ADDRESS(REALVIEW_SYS_BASE) +
-		      REALVIEW_SYS_FLAGSS_OFFSET));
+		     __io_address(REALVIEW_SYS_BASE) +
+		     REALVIEW_SYS_FLAGSS_OFFSET);
 #define REALVIEW_SYS_FLAGSC_OFFSET 0x34
 	__raw_writel(3,
-		     (IO_ADDRESS(REALVIEW_SYS_BASE) +
-		      REALVIEW_SYS_FLAGSC_OFFSET));
+		     __io_address(REALVIEW_SYS_BASE) +
+		     REALVIEW_SYS_FLAGSC_OFFSET);
 #endif
 
 	mb();