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genirq: Split irq_set_affinity() so it can be called with lock held.

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The .irq_cpu_online() and .irq_cpu_offline() functions may need to
adjust affinity, but they are called with the descriptor lock held.
Create __irq_set_affinity_locked() which is called with the lock held.
Make irq_set_affinity() just a wrapper that acquires the lock.

[ tglx: Changed the argument to irq_data, added a !desc check and
        moved the !irq_set_affinity check where it belongs ]

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: ralf@linux-mips.org
LKML-Reference: <1301081931-11240-4-git-send-email-ddaney@caviumnetworks.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
David Daney 2011-03-25 12:38:50 -07:00 • committed by Thomas Gleixner
parent b3d422329f
commit c2d0c555c2
2 changed files with 37 additions and 24 deletions
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1
include/linux/irq.h
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@ -382,6 +382,7 @@ extern void remove_irq(unsigned int irq, struct irqaction *act);
extern void irq_cpu_online(void);
extern void irq_cpu_offline(void);
extern int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *cpumask);
#ifdef CONFIG_GENERIC_HARDIRQS