From: tip-bot for Thomas Gleixner <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
k.kozlowski@samsung.com, kgene.kim@samsung.com,
kyungmin.park@samsung.com, b.zolnierkie@samsung.com,
m.szyprowski@samsung.com, tglx@linutronix.de
Subject: [tip:irq/urgent] irqchip: Gic: Support forced affinity setting
Date: Thu, 17 Apr 2014 14:39:56 -0700 [thread overview]
Message-ID: <tip-ffde1de64012c406dfdda8690918248b472f24e4@git.kernel.org> (raw)
In-Reply-To: <20140416143315.916984416@linutronix.de>
Commit-ID: ffde1de64012c406dfdda8690918248b472f24e4
Gitweb: http://git.kernel.org/tip/ffde1de64012c406dfdda8690918248b472f24e4
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Wed, 16 Apr 2014 14:36:44 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 17 Apr 2014 23:36:28 +0200
irqchip: Gic: Support forced affinity setting
To support the affinity setting of per cpu timers in the early startup
of a not yet online cpu, implement the force logic, which disables the
cpu online check.
Tagged for stable to allow a simple fix of the affected SoC clock
event drivers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Tomasz Figa <t.figa@samsung.com>,
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org,
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20140416143315.916984416@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/irqchip/irq-gic.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4300b66..57d165e 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -246,10 +246,14 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
bool force)
{
void __iomem *reg = gic_dist_base(d) + GIC_DIST_TARGET + (gic_irq(d) & ~3);
- unsigned int shift = (gic_irq(d) % 4) * 8;
- unsigned int cpu = cpumask_any_and(mask_val, cpu_online_mask);
+ unsigned int cpu, shift = (gic_irq(d) % 4) * 8;
u32 val, mask, bit;
+ if (!force)
+ cpu = cpumask_any_and(mask_val, cpu_online_mask);
+ else
+ cpu = cpumask_first(mask_val);
+
if (cpu >= NR_GIC_CPU_IF || cpu >= nr_cpu_ids)
return -EINVAL;
next prev parent reply other threads:[~2014-04-17 21:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-16 14:36 [patch 0/4] genirq/exynos timers: Fix the CPU hotplug wreckage sanely Thomas Gleixner
2014-04-16 14:36 ` [patch 2/4] irqchip: gic: Support forced affinity setting Thomas Gleixner
2014-04-17 21:39 ` tip-bot for Thomas Gleixner [this message]
2014-04-16 14:36 ` [patch 1/4] genirq: Allow forcing cpu affinity of interrupts Thomas Gleixner
2014-04-17 21:39 ` [tip:irq/urgent] " tip-bot for Thomas Gleixner
2014-04-16 14:36 ` [patch 4/4] clocksource: exynos_mct: Register clock event after request_irq() Thomas Gleixner
2014-04-17 21:40 ` [tip:irq/urgent] clocksource: Exynos_mct: " tip-bot for Krzysztof Kozlowski
2014-04-16 14:36 ` [patch 3/4] clocksource: exynos_mct: Use irq_force_affinity() in cpu bringup Thomas Gleixner
2014-04-17 21:40 ` [tip:irq/urgent] clocksource: Exynos_mct: Use irq_force_affinity( ) " tip-bot for Thomas Gleixner
2014-04-16 15:59 ` [patch 0/4] genirq/exynos timers: Fix the CPU hotplug wreckage sanely Krzysztof Kozlowski
2014-04-16 21:16 ` Thomas Gleixner
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