s390/idle: remove raw_local_irq_save()/restore() from arch_cpu_idle()

arch_cpu_idle() gets called with interrupts disabled,
and psw_idle() returns with interrupts disabled.
No reason to use raw_local_irq_save() / restore().

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index bbf6b7d..ae27e9f 100644 (file)
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -25,18 +25,15 @@ void arch_cpu_idle(void)
 {
        struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
        unsigned long long idle_time;
-       unsigned long psw_mask, flags;
-
+       unsigned long psw_mask;
 
        /* Wait for external, I/O or machine check interrupt. */
        psw_mask = PSW_KERNEL_BITS | PSW_MASK_WAIT | PSW_MASK_DAT |
                PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
        clear_cpu_flag(CIF_NOHZ_DELAY);
 
-       raw_local_irq_save(flags);
-       /* Call the assembler magic in entry.S */
+       /* psw_idle() returns with interrupts disabled. */
        psw_idle(idle, psw_mask);
-       raw_local_irq_restore(flags);
 
        /* Account time spent with enabled wait psw loaded as idle time. */
        raw_write_seqcount_begin(&idle->seqcount);