diff options
Diffstat (limited to 'arch/s390/lib/delay.c')
| -rw-r--r-- | arch/s390/lib/delay.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c index 02854449b74b..70f2a862b670 100644 --- a/arch/s390/lib/delay.c +++ b/arch/s390/lib/delay.c @@ -15,6 +15,7 @@ #include <linux/delay.h> #include <linux/timex.h> #include <linux/irqflags.h> +#include <linux/interrupt.h> void __delay(unsigned long loops) { @@ -35,7 +36,11 @@ void __udelay(unsigned long usecs) { u64 end, time, jiffy_timer = 0; unsigned long flags, cr0, mask, dummy; + int irq_context; + irq_context = in_interrupt(); + if (!irq_context) + local_bh_disable(); local_irq_save(flags); if (raw_irqs_disabled_flags(flags)) { jiffy_timer = S390_lowcore.jiffy_timer; @@ -62,6 +67,8 @@ void __udelay(unsigned long usecs) __ctl_load(cr0, 0, 0); S390_lowcore.jiffy_timer = jiffy_timer; } + if (!irq_context) + _local_bh_enable(); set_clock_comparator(S390_lowcore.jiffy_timer); local_irq_restore(flags); } |