diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-02-12 12:16:16 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-19 12:58:23 +0100 |
| commit | d5eb4ad2dfb2dfae43fd51bc8630b4fc3ef00e92 (patch) | |
| tree | ec164ed62dd55d14e0f73e1ba6f894433f70394e /kernel/irq/irqdesc.c | |
| parent | genirq: Remove real old transition functions (diff) | |
| download | linux-d5eb4ad2dfb2dfae43fd51bc8630b4fc3ef00e92.tar.xz linux-d5eb4ad2dfb2dfae43fd51bc8630b4fc3ef00e92.zip | |
genirq: Implement irq_get/put_desc_[bus]locked/unlock()
Most of the managing functions get the irq descriptor and lock it -
either with or without buslock. Instead of open coding this over and
over provide a common function to do that.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq/irqdesc.c')
| -rw-r--r-- | kernel/irq/irqdesc.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 3387fbd7f2f4..394ab6a6c62c 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -402,6 +402,26 @@ unsigned int irq_get_next_irq(unsigned int offset) return find_next_bit(allocated_irqs, nr_irqs, offset); } +struct irq_desc * +__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus) +{ + struct irq_desc *desc = irq_to_desc(irq); + + if (desc) { + if (bus) + chip_bus_lock(desc); + raw_spin_lock_irqsave(&desc->lock, *flags); + } + return desc; +} + +void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus) +{ + raw_spin_unlock_irqrestore(&desc->lock, flags); + if (bus) + chip_bus_sync_unlock(desc); +} + /** * dynamic_irq_cleanup - cleanup a dynamically allocated irq * @irq: irq number to initialize |