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| author | Thomas Gleixner <tglx@linutronix.de> | 2009-07-21 11:09:39 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-07-21 14:35:07 +0200 |
| commit | 591d2fb02ea80472d846c0b8507007806bdd69cc (patch) | |
| tree | c7962a95a47bbdf664f15a504eff24c351f33613 /kernel/irq/internals.h | |
| parent | aea1f7964ae6cba5eb419a958956deb9016b3341 (diff) | |
| download | kernel_samsung_smdk4412-591d2fb02ea80472d846c0b8507007806bdd69cc.zip kernel_samsung_smdk4412-591d2fb02ea80472d846c0b8507007806bdd69cc.tar.gz kernel_samsung_smdk4412-591d2fb02ea80472d846c0b8507007806bdd69cc.tar.bz2 | |
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.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 7346825..e70ed55 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: |