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authorThomas Gleixner <tglx@linutronix.de>2009-07-21 11:09:39 +0200
committerThomas Gleixner <tglx@linutronix.de>2009-07-21 14:35:07 +0200
commit591d2fb02ea80472d846c0b8507007806bdd69cc (patch)
treec7962a95a47bbdf664f15a504eff24c351f33613 /kernel/irq/internals.h
parentaea1f7964ae6cba5eb419a958956deb9016b3341 (diff)
genirq: Delegate irq affinity setting to the irq thread
irq_set_thread_affinity() calls set_cpus_allowed_ptr() which might sleep, but irq_set_thread_affinity() is called with desc->lock held and can be called from hard interrupt context as well. The code has another bug as it does not hold a ref on the task struct as required by set_cpus_allowed_ptr(). Just set the IRQTF_AFFINITY bit in action->thread_flags. The next time the thread runs it migrates itself. Solves all of the above problems nicely. Add kerneldoc to irq_set_thread_affinity() while at it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <new-submission>
Diffstat (limited to 'kernel/irq/internals.h')
-rw-r--r--kernel/irq/internals.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 73468253143..e70ed5592eb 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -42,8 +42,7 @@ static inline void unregister_handler_proc(unsigned int irq,
extern int irq_select_affinity_usr(unsigned int irq);
-extern void
-irq_set_thread_affinity(struct irq_desc *desc, const struct cpumask *cpumask);
+extern void irq_set_thread_affinity(struct irq_desc *desc);
/*
* Debugging printout: