____napi_schedule() needs to be invoked with disabled interrupts due to __raise_softirq_irqoff (in order not to corrupt the per-CPU list). ____napi_schedule() needs also to be invoked from an interrupt context so that the raised-softirq is processed while the interrupt context is left. Add lockdep asserts for both conditions. While this is the second time the irq/softirq check is needed, provide a generic lockdep_assert_softirq_will_run() which is used by both caller.
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| @@ -329,6 +329,12 @@ extern void lock_unpin_lock(struct lockdep_map *lock, struct pin_cookie); · 328 unmodified lines | |||
| 329 | 329 | ||
| 330 | #define lockdep_assert_none_held_once() \ | 330 | #define lockdep_assert_none_held_once() \ |
| 331 | lockdep_assert_once(!current->lockdep_depth) | 331 | lockdep_assert_once(!current->lockdep_depth) |
| 332 | /* | ||
| 333 | * Ensure that softirq is handled within the callchain and not delayed and | ||
| 334 | * handled by chance. | ||
| 335 | */ | ||
| 336 | #define lockdep_assert_softirq_will_run() \ | ||
| 337 | lockdep_assert_once(hardirq_count() | softirq_count()) | ||
| 332 | 338 | ||
| 333 | #define lockdep_recursing(tsk) ((tsk)->lockdep_recursion) | 339 | #define lockdep_recursing(tsk) ((tsk)->lockdep_recursion) |
| 334 | 340 | ||
| @@ -414,6 +420,7 @@ extern int lockdep_is_held(const void *); · 79 unmodified lines | |||
| 414 | #define lockdep_assert_held_read(l) do { (void)(l); } while (0) | 420 | #define lockdep_assert_held_read(l) do { (void)(l); } while (0) |
| 415 | #define lockdep_assert_held_once(l) do { (void)(l); } while (0) | 421 | #define lockdep_assert_held_once(l) do { (void)(l); } while (0) |
| 416 | #define lockdep_assert_none_held_once() do { } while (0) | 422 | #define lockdep_assert_none_held_once() do { } while (0) |
| 423 | #define lockdep_assert_softirq_will_run() do { } while (0) | ||
| 417 | 424 | ||
| 418 | #define lockdep_recursing(tsk) (0) | 425 | #define lockdep_recursing(tsk) (0) |
| 419 | 426 | ||