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c777ac55 AM |
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 |