1
2 #include <linux/irq.h>
3 #include <linux/interrupt.h>
4
5 #include "internals.h"
6
7 void move_masked_irq(int irq)
8 {
9 struct irq_desc *desc = irq_to_desc(irq);
10
11 if (likely(!(desc->status & IRQ_MOVE_PENDING)))
12 return;
13
14 /*
15 * Paranoia: cpu-local interrupts shouldn't be calling in here anyway.
16 */
17 if (CHECK_IRQ_PER_CPU(desc->status)) {
18 WARN_ON(1);
19 return;
20 }
21
22 desc->status &= ~IRQ_MOVE_PENDING;
23
24 if (unlikely(cpumask_empty(desc->pending_mask)))
25 return;
26
27 if (!desc->chip->set_affinity)
28 return;
29
30 assert_spin_locked(&desc->lock);
31
32 /*
33 * If there was a valid mask to work with, please
34 * do the disable, re-program, enable sequence.
35 * This is *not* particularly important for level triggered
36 * but in a edge trigger case, we might be setting rte
37 * when an active trigger is comming in. This could
38 * cause some ioapics to mal-function.
39 * Being paranoid i guess!
40 *
41 * For correct operation this depends on the caller
42 * masking the irqs.
43 */
44 if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
45 < nr_cpu_ids))
46 if (!desc->chip->set_affinity(irq, desc->pending_mask)) {
47 cpumask_copy(desc->affinity, desc->pending_mask);
48 irq_set_thread_affinity(desc);
49 }
50
51 cpumask_clear(desc->pending_mask);
52 }
53
54 void move_native_irq(int irq)
55 {
56 struct irq_desc *desc = irq_to_desc(irq);
57
58 if (likely(!(desc->status & IRQ_MOVE_PENDING)))
59 return;
60
61 if (unlikely(desc->status & IRQ_DISABLED))
62 return;
63
64 desc->chip->mask(irq);
65 move_masked_irq(irq);
66 desc->chip->unmask(irq);
67 }
68
69
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