s390/idle: merge enabled_wait() and arch_cpu_idle()

The only caller of enabled_wait() besides arch_cpu_idle() was
udelay(). Since that call doesn't exist anymore, merge enabled_wait()
and arch_cpu_idle().
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/processor.h

@@ -290,11 +290,6 @@ static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
 	return (psw.addr - ilc) & mask;
 }
 
-/*
- * Function to stop a processor until the next interrupt occurs
- */
-void enabled_wait(void);
-
 /*
  * Function to drop a processor into disabled wait state
  */

arch/s390/kernel/idle.c

@@ -21,7 +21,7 @@
 
 static DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
 
-void enabled_wait(void)
+void arch_cpu_idle(void)
 {
 	struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
 	unsigned long long idle_time;
@@ -46,8 +46,9 @@ void enabled_wait(void)
 	idle->idle_count++;
 	account_idle_time(cputime_to_nsecs(idle_time));
 	raw_write_seqcount_end(&idle->seqcount);
+	raw_local_irq_enable();
 }
-NOKPROBE_SYMBOL(enabled_wait);
+NOKPROBE_SYMBOL(arch_cpu_idle);
 
 static ssize_t show_idle_count(struct device *dev,
 				struct device_attribute *attr, char *buf)
@@ -120,12 +121,6 @@ void arch_cpu_idle_enter(void)
 {
 }
 
-void arch_cpu_idle(void)
-{
-	enabled_wait();
-	raw_local_irq_enable();
-}
-
 void arch_cpu_idle_exit(void)
 {
 }