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Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull timer fixes from Thomas Gleixner:
 "This contains:

   - a build regression fix introduced by the timeconst move

   - a hotplug regression fix introduced by the timer wheel diet

   - a cpu hotplug bug fix for the exynos clocksource driver"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  time: Remove development rules from Kbuild/Makefile
  timer: Fix hotplug regression
  clocksource: exynos_mct: Avoid blocking calls in the cpu hotplug notifier
hifive-unleashed-5.1
Linus Torvalds 2015-07-01 15:44:18 -07:00
parent d5fb82137b 65f26062cd
commit 6ac15baacb
4 changed files with 32 additions and 17 deletions
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1
Kbuild
View File

@ -52,7 +52,6 @@ $(obj)/$(bounds-file): kernel/bounds.s FORCE
timeconst-file := include/generated/timeconst.h
#always += $(timeconst-file)
targets += $(timeconst-file)
quiet_cmd_gentimeconst = GEN $@

43
drivers/clocksource/exynos_mct.c
View File

@ -462,15 +462,12 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt)
exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
if (mct_int_type == MCT_INT_SPI) {
evt->irq = mct_irqs[MCT_L0_IRQ + cpu];
if (request_irq(evt->irq, exynos4_mct_tick_isr,
IRQF_TIMER | IRQF_NOBALANCING,
evt->name, mevt)) {
pr_err("exynos-mct: cannot register IRQ %d\n",
evt->irq);
if (evt->irq == -1)
return -EIO;
}
irq_force_affinity(mct_irqs[MCT_L0_IRQ + cpu], cpumask_of(cpu));
irq_force_affinity(evt->irq, cpumask_of(cpu));
enable_irq(evt->irq);
} else {
enable_percpu_irq(mct_irqs[MCT_L0_IRQ], 0);
}
@ -483,10 +480,12 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt)
static void exynos4_local_timer_stop(struct clock_event_device *evt)
{
evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
if (mct_int_type == MCT_INT_SPI)
free_irq(evt->irq, this_cpu_ptr(&percpu_mct_tick));
else
if (mct_int_type == MCT_INT_SPI) {
if (evt->irq != -1)
disable_irq_nosync(evt->irq);
} else {
disable_percpu_irq(mct_irqs[MCT_L0_IRQ]);
}
}
static int exynos4_mct_cpu_notify(struct notifier_block *self,
@ -518,7 +517,7 @@ static struct notifier_block exynos4_mct_cpu_nb = {
static void __init exynos4_timer_resources(struct device_node *np, void __iomem *base)
{
int err;
int err, cpu;
struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick);
struct clk *mct_clk, *tick_clk;
@ -545,7 +544,25 @@ static void __init exynos4_timer_resources(struct device_node *np, void __iomem
WARN(err, "MCT: can't request IRQ %d (%d)\n",
mct_irqs[MCT_L0_IRQ], err);
} else {
irq_set_affinity(mct_irqs[MCT_L0_IRQ], cpumask_of(0));
for_each_possible_cpu(cpu) {
int mct_irq = mct_irqs[MCT_L0_IRQ + cpu];
struct mct_clock_event_device *pcpu_mevt =
per_cpu_ptr(&percpu_mct_tick, cpu);
pcpu_mevt->evt.irq = -1;
irq_set_status_flags(mct_irq, IRQ_NOAUTOEN);
if (request_irq(mct_irq,
exynos4_mct_tick_isr,
IRQF_TIMER | IRQF_NOBALANCING,
pcpu_mevt->name, pcpu_mevt)) {
pr_err("exynos-mct: cannot register IRQ (cpu%d)\n",
cpu);
continue;
}
pcpu_mevt->evt.irq = mct_irq;
}
}
err = register_cpu_notifier(&exynos4_mct_cpu_nb);

2
kernel/time/Makefile
View File

@ -12,5 +12,3 @@ obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o tick-sched.o
obj-$(CONFIG_TIMER_STATS) += timer_stats.o
obj-$(CONFIG_DEBUG_FS) += timekeeping_debug.o
obj-$(CONFIG_TEST_UDELAY) += test_udelay.o
$(obj)/time.o: $(objtree)/include/config/

3
kernel/time/timer.c
View File

@ -1566,7 +1566,7 @@ static void migrate_timers(int cpu)
BUG_ON(cpu_online(cpu));
old_base = per_cpu_ptr(&tvec_bases, cpu);
new_base = this_cpu_ptr(&tvec_bases);
new_base = get_cpu_ptr(&tvec_bases);
/*
* The caller is globally serialized and nobody else
* takes two locks at once, deadlock is not possible.
@ -1590,6 +1590,7 @@ static void migrate_timers(int cpu)
spin_unlock(&old_base->lock);
spin_unlock_irq(&new_base->lock);
put_cpu_ptr(&tvec_bases);
}
static int timer_cpu_notify(struct notifier_block *self,