diff options
Diffstat (limited to 'arch/s390/lib/delay.c')
| -rw-r--r-- | arch/s390/lib/delay.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c index 97c1eca83cc..752b362bf65 100644 --- a/arch/s390/lib/delay.c +++ b/arch/s390/lib/delay.c @@ -25,13 +25,13 @@ void __delay(unsigned long loops) asm volatile("0: brct %0,0b" : : "d" ((loops/2) + 1)); } -static void __udelay_disabled(unsigned long usecs) +static void __udelay_disabled(unsigned long long usecs) { unsigned long mask, cr0, cr0_saved; u64 clock_saved; clock_saved = local_tick_disable(); - set_clock_comparator(get_clock() + ((u64) usecs << 12)); + set_clock_comparator(get_clock() + (usecs << 12)); __ctl_store(cr0_saved, 0, 0); cr0 = (cr0_saved & 0xffff00e0) | 0x00000800; __ctl_load(cr0 , 0, 0); @@ -46,20 +46,25 @@ static void __udelay_disabled(unsigned long usecs) set_clock_comparator(S390_lowcore.clock_comparator); } -static void __udelay_enabled(unsigned long usecs) +static void __udelay_enabled(unsigned long long usecs) { unsigned long mask; - u64 end, time; + u64 clock_saved; + u64 end; mask = psw_kernel_bits | PSW_MASK_WAIT | PSW_MASK_EXT | PSW_MASK_IO; - end = get_clock() + ((u64) usecs << 12); + end = get_clock() + (usecs << 12); do { - time = end < S390_lowcore.clock_comparator ? - end : S390_lowcore.clock_comparator; - set_clock_comparator(time); + clock_saved = 0; + if (end < S390_lowcore.clock_comparator) { + clock_saved = local_tick_disable(); + set_clock_comparator(end); + } trace_hardirqs_on(); __load_psw_mask(mask); local_irq_disable(); + if (clock_saved) + local_tick_enable(clock_saved); } while (get_clock() < end); set_clock_comparator(S390_lowcore.clock_comparator); } @@ -67,7 +72,7 @@ static void __udelay_enabled(unsigned long usecs) /* * Waits for 'usecs' microseconds using the TOD clock comparator. */ -void __udelay(unsigned long usecs) +void __udelay(unsigned long long usecs) { unsigned long flags; @@ -101,11 +106,11 @@ EXPORT_SYMBOL(__udelay); * Simple udelay variant. To be used on startup and reboot * when the interrupt handler isn't working. */ -void udelay_simple(unsigned long usecs) +void udelay_simple(unsigned long long usecs) { u64 end; - end = get_clock() + ((u64) usecs << 12); + end = get_clock() + (usecs << 12); while (get_clock() < end) cpu_relax(); } |