hrtimer: Revert CLOCK_MONOTONIC_RAW support
Revert commits:
a6e707ddbdf1: KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW
9006a01829a5: hrtimer: Catch illegal clockids
9c808765e88e: hrtimer: Add support for CLOCK_MONOTONIC_RAW
Marc found out, that there are fundamental issues with that patch series
because __hrtimer_get_next_event() and hrtimer_forward() need support for
CLOCK_MONOTONIC_RAW. Nothing which is easily fixed, so revert the whole lot.
Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/56D6CEF0.8060607@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index a6d64af..76dd4f0 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -151,7 +151,6 @@
HRTIMER_BASE_REALTIME,
HRTIMER_BASE_BOOTTIME,
HRTIMER_BASE_TAI,
- HRTIMER_BASE_MONOTONIC_RAW,
HRTIMER_MAX_CLOCK_BASES,
};
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index cb0fe70..435b885 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -90,30 +90,19 @@
.clockid = CLOCK_TAI,
.get_time = &ktime_get_clocktai,
},
- {
- .index = HRTIMER_BASE_MONOTONIC_RAW,
- .clockid = CLOCK_MONOTONIC_RAW,
- .get_time = &ktime_get_raw,
- },
}
};
static const int hrtimer_clock_to_base_table[MAX_CLOCKS] = {
- /* Make sure we catch unsupported clockids */
- [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
-
[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME,
[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC,
- [CLOCK_MONOTONIC_RAW] = HRTIMER_BASE_MONOTONIC_RAW,
[CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME,
[CLOCK_TAI] = HRTIMER_BASE_TAI,
};
static inline int hrtimer_clockid_to_base(clockid_t clock_id)
{
- int base = hrtimer_clock_to_base_table[clock_id];
- BUG_ON(base == HRTIMER_MAX_CLOCK_BASES);
- return base;
+ return hrtimer_clock_to_base_table[clock_id];
}
/*
@@ -1279,10 +1268,7 @@
if (!(active & 0x01))
continue;
- if (unlikely(base->index == HRTIMER_BASE_MONOTONIC_RAW))
- basenow = ktime_get_raw();
- else
- basenow = ktime_add(now, base->offset);
+ basenow = ktime_add(now, base->offset);
while ((node = timerqueue_getnext(&base->active))) {
struct hrtimer *timer;
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 97c5815..69bca18 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -48,7 +48,7 @@
static void timer_arm(struct arch_timer_cpu *timer, u64 ns)
{
timer->armed = true;
- hrtimer_start(&timer->timer, ktime_add_ns(ktime_get_raw(), ns),
+ hrtimer_start(&timer->timer, ktime_add_ns(ktime_get(), ns),
HRTIMER_MODE_ABS);
}
@@ -308,7 +308,7 @@
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
INIT_WORK(&timer->expired, kvm_timer_inject_irq_work);
- hrtimer_init(&timer->timer, CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
+ hrtimer_init(&timer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
timer->timer.function = kvm_timer_expire;
}