/* * Generic cpu hotunplug interrupt migration code copied from the * arch/arm implementation * * Copyright (C) Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include "internals.h" static bool migrate_one_irq(struct irq_desc *desc) { struct irq_data *d = irq_desc_get_irq_data(desc); const struct cpumask *affinity = d->common->affinity; struct irq_chip *c; bool ret = false; /* * If this is a per-CPU interrupt, or the affinity does not * include this CPU, then we have nothing to do. */ if (irqd_is_per_cpu(d) || !cpumask_test_cpu(smp_processor_id(), affinity)) return false; if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) { affinity = cpu_online_mask; ret = true; } c = irq_data_get_irq_chip(d); if (!c->irq_set_affinity) { pr_debug("IRQ%u: unable to set affinity\n", d->irq); } else { int r = irq_do_set_affinity(d, affinity, false); if (r) pr_warn_ratelimited("IRQ%u: set affinity failed(%d).\n", d->irq, r); } return ret; } /** * irq_migrate_all_off_this_cpu - Migrate irqs away from offline cpu * * The current CPU has been marked offline. Migrate IRQs off this CPU. * If the affinity settings do not allow other CPUs, force them onto any * available CPU. * * Note: we must iterate over all IRQs, whether they have an attached * action structure or not, as we need to get chained interrupts too. */ void irq_migrate_all_off_this_cpu(void) { unsigned int irq; struct irq_desc *desc; unsigned long flags; local_irq_save(flags); for_each_active_irq(irq) { bool affinity_broken; desc = irq_to_desc(irq); raw_spin_lock(&desc->lock); affinity_broken = migrate_one_irq(desc); raw_spin_unlock(&desc->lock); if (affinity_broken) pr_warn_ratelimited("IRQ%u no longer affine to CPU%u\n", irq, smp_processor_id()); } local_irq_restore(flags); } git.cgi/linux/net-next.git/diff/sound/soc/blackfin/bf5xx-i2s-pcm.h?id=1f369d1655c1de415a186c6ce9004e40ca790989'>diff
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /sound/soc/codecs/tas5720.h
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'sound/soc/codecs/tas5720.h')