3.13.11.3 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Gleixner <t...@linutronix.de> commit 30ccf03b4a6a2102a2219058bdc6d779dc637dd7 upstream. The starting cpu is not yet in the online mask so irq_set_affinity() fails which results in per cpu timers for this cpu ending up on some other online cpu, ususally cpu 0. Use irq_force_affinity() which disables the online mask check and makes things work. Signed-off-by: Thomas Gleixner <t...@linutronix.de> Tested-by: Krzysztof Kozlowski <k.kozlow...@samsung.com> Cc: Kyungmin Park <kyungmin.p...@samsung.com> Cc: Marek Szyprowski <m.szyprow...@samsung.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnier...@samsung.com> Cc: Tomasz Figa <t.f...@samsung.com>, Cc: Daniel Lezcano <daniel.lezc...@linaro.org>, Cc: Kukjin Kim <kgene....@samsung.com> Cc: linux-arm-ker...@lists.infradead.org, Link: http://lkml.kernel.org/r/20140416143316.106665...@linutronix.de Signed-off-by: Thomas Gleixner <t...@linutronix.de> Signed-off-by: Kamal Mostafa <ka...@canonical.com> --- drivers/clocksource/exynos_mct.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index 62b0de6..b17b3e0 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -428,6 +428,7 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt) evt->irq); return -EIO; } + irq_force_affinity(mct_irqs[MCT_L0_IRQ + cpu], cpumask_of(cpu)); } else { enable_percpu_irq(mct_irqs[MCT_L0_IRQ], 0); } @@ -448,7 +449,6 @@ static int exynos4_mct_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) { struct mct_clock_event_device *mevt; - unsigned int cpu; /* * Grab cpu pointer in each case to avoid spurious @@ -459,12 +459,6 @@ static int exynos4_mct_cpu_notify(struct notifier_block *self, mevt = this_cpu_ptr(&percpu_mct_tick); exynos4_local_timer_setup(&mevt->evt); break; - case CPU_ONLINE: - cpu = (unsigned long)hcpu; - if (mct_int_type == MCT_INT_SPI) - irq_set_affinity(mct_irqs[MCT_L0_IRQ + cpu], - cpumask_of(cpu)); - break; case CPU_DYING: mevt = this_cpu_ptr(&percpu_mct_tick); exynos4_local_timer_stop(&mevt->evt); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
