diff options
| -rw-r--r-- | arch/arm/include/asm/delay.h | 1 | ||||
| -rw-r--r-- | arch/arm/kernel/smp.c | 3 | ||||
| -rw-r--r-- | arch/arm/lib/delay.c | 1 |
3 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/include/asm/delay.h b/arch/arm/include/asm/delay.h index ab98fdd083bd..720799fd3a81 100644 --- a/arch/arm/include/asm/delay.h +++ b/arch/arm/include/asm/delay.h @@ -24,6 +24,7 @@ extern struct arm_delay_ops { void (*delay)(unsigned long); void (*const_udelay)(unsigned long); void (*udelay)(unsigned long); + bool const_clock; } arm_delay_ops; #define __delay(n) arm_delay_ops.delay(n) diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 84f4cbf652e5..58af91c2a2f7 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -693,6 +693,9 @@ static int cpufreq_callback(struct notifier_block *nb, if (freq->flags & CPUFREQ_CONST_LOOPS) return NOTIFY_OK; + if (arm_delay_ops.const_clock) + return NOTIFY_OK; + if (!per_cpu(l_p_j_ref, cpu)) { per_cpu(l_p_j_ref, cpu) = per_cpu(cpu_data, cpu).loops_per_jiffy; diff --git a/arch/arm/lib/delay.c b/arch/arm/lib/delay.c index 0dc53854a5d8..6b93f6a1a3c7 100644 --- a/arch/arm/lib/delay.c +++ b/arch/arm/lib/delay.c @@ -77,6 +77,7 @@ void __init register_current_timer_delay(const struct delay_timer *timer) arm_delay_ops.delay = __timer_delay; arm_delay_ops.const_udelay = __timer_const_udelay; arm_delay_ops.udelay = __timer_udelay; + arm_delay_ops.const_clock = true; delay_calibrated = true; } else { pr_info("Ignoring duplicate/late registration of read_current_timer delay\n"); |