| Andrew Morton | c777ac5 | 2006-03-25 03:07:36 -0800 | [diff] [blame^] | 1 | #include <linux/irq.h> |
| 2 | |
| 3 | #if defined(CONFIG_GENERIC_PENDING_IRQ) |
| 4 | |
| 5 | void set_pending_irq(unsigned int irq, cpumask_t mask) |
| 6 | { |
| 7 | irq_desc_t *desc = irq_desc + irq; |
| 8 | unsigned long flags; |
| 9 | |
| 10 | spin_lock_irqsave(&desc->lock, flags); |
| 11 | desc->move_irq = 1; |
| 12 | pending_irq_cpumask[irq] = mask; |
| 13 | spin_unlock_irqrestore(&desc->lock, flags); |
| 14 | } |
| 15 | |
| 16 | void move_native_irq(int irq) |
| 17 | { |
| 18 | cpumask_t tmp; |
| 19 | irq_desc_t *desc = irq_descp(irq); |
| 20 | |
| 21 | if (likely (!desc->move_irq)) |
| 22 | return; |
| 23 | |
| 24 | desc->move_irq = 0; |
| 25 | |
| 26 | if (likely(cpus_empty(pending_irq_cpumask[irq]))) |
| 27 | return; |
| 28 | |
| 29 | if (!desc->handler->set_affinity) |
| 30 | return; |
| 31 | |
| 32 | /* note - we hold the desc->lock */ |
| 33 | cpus_and(tmp, pending_irq_cpumask[irq], cpu_online_map); |
| 34 | |
| 35 | /* |
| 36 | * If there was a valid mask to work with, please |
| 37 | * do the disable, re-program, enable sequence. |
| 38 | * This is *not* particularly important for level triggered |
| 39 | * but in a edge trigger case, we might be setting rte |
| 40 | * when an active trigger is comming in. This could |
| 41 | * cause some ioapics to mal-function. |
| 42 | * Being paranoid i guess! |
| 43 | */ |
| 44 | if (unlikely(!cpus_empty(tmp))) { |
| 45 | desc->handler->disable(irq); |
| 46 | desc->handler->set_affinity(irq,tmp); |
| 47 | desc->handler->enable(irq); |
| 48 | } |
| 49 | cpus_clear(pending_irq_cpumask[irq]); |
| 50 | } |
| 51 | |
| 52 | #endif |