Perf modules abuse irq_set_affinity_hint() to set the affinity of system PMU interrupts just because irq_set_affinity() was not exported. The fact that irq_set_affinity_hint() actually sets the affinity is a non-documented side effect and the name is clearly saying it's a hint. To clean this up, export the real affinity setter.
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| @@ -441,7 +441,8 @@ out_unlock: · 440 unmodified lines | |||
| 441 | return ret; | 441 | return ret; |
| 442 | } | 442 | } |
| 443 | 443 | ||
| 444 | int __irq_set_affinity(unsigned int irq, const struct cpumask *mask, bool force) | 444 | static int __irq_set_affinity(unsigned int irq, const struct cpumask *mask, |
| 445 | bool force) | ||
| 445 | { | 446 | { |
| 446 | struct irq_desc *desc = irq_to_desc(irq); | 447 | struct irq_desc *desc = irq_to_desc(irq); |
| 447 | unsigned long flags; | 448 | unsigned long flags; |
| @@ -456,6 +457,36 @@ int __irq_set_affinity(unsigned int irq, const struct cpumask *mask, bool force) · 8 unmodified lines | |||
| 456 | return ret; | 457 | return ret; |
| 457 | } | 458 | } |
| 458 | 459 | ||
| 460 | /** | ||
| 461 | * irq_set_affinity - Set the irq affinity of a given irq | ||
| 462 | * @irq: Interrupt to set affinity | ||
| 463 | * @cpumask: cpumask | ||
| 464 | * | ||
| 465 | * Fails if cpumask does not contain an online CPU | ||
| 466 | */ | ||
| 467 | int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask) | ||
| 468 | { | ||
| 469 | return __irq_set_affinity(irq, cpumask, false); | ||
| 470 | } | ||
| 471 | EXPORT_SYMBOL_GPL(irq_set_affinity); | ||
| 472 | |||
| 473 | /** | ||
| 474 | * irq_force_affinity - Force the irq affinity of a given irq | ||
| 475 | * @irq: Interrupt to set affinity | ||
| 476 | * @cpumask: cpumask | ||
| 477 | * | ||
| 478 | * Same as irq_set_affinity, but without checking the mask against | ||
| 479 | * online cpus. | ||
| 480 | * | ||
| 481 | * Solely for low level cpu hotplug code, where we need to make per | ||
| 482 | * cpu interrupts affine before the cpu becomes online. | ||
| 483 | */ | ||
| 484 | int irq_force_affinity(unsigned int irq, const struct cpumask *cpumask) | ||
| 485 | { | ||
| 486 | return __irq_set_affinity(irq, cpumask, true); | ||
| 487 | } | ||
| 488 | EXPORT_SYMBOL_GPL(irq_force_affinity); | ||
| 489 | |||
| 459 | int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m) | 490 | int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m) |
| 460 | { | 491 | { |
| 461 | unsigned long flags; | 492 | unsigned long flags; |