Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
sched.h: Move (spin|rwlock)_needbreak() to spinlock.h
This lets us kill the dependency on spinlock.h.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
+31
-31
-31
include/linux/sched.h
-31
include/linux/sched.h
···
2227
2227
return preempt_model_full() || preempt_model_rt();
2228
2228
}
2229
2229
2230
-
/*
2231
-
* Does a critical section need to be broken due to another
2232
-
* task waiting?: (technically does not depend on CONFIG_PREEMPTION,
2233
-
* but a general need for low latency)
2234
-
*/
2235
-
static inline int spin_needbreak(spinlock_t *lock)
2236
-
{
2237
-
#ifdef CONFIG_PREEMPTION
2238
-
return spin_is_contended(lock);
2239
-
#else
2240
-
return 0;
2241
-
#endif
2242
-
}
2243
-
2244
-
/*
2245
-
* Check if a rwlock is contended.
2246
-
* Returns non-zero if there is another task waiting on the rwlock.
2247
-
* Returns zero if the lock is not contended or the system / underlying
2248
-
* rwlock implementation does not support contention detection.
2249
-
* Technically does not depend on CONFIG_PREEMPTION, but a general need
2250
-
* for low latency.
2251
-
*/
2252
-
static inline int rwlock_needbreak(rwlock_t *lock)
2253
-
{
2254
-
#ifdef CONFIG_PREEMPTION
2255
-
return rwlock_is_contended(lock);
2256
-
#else
2257
-
return 0;
2258
-
#endif
2259
-
}
2260
-
2261
2230
static __always_inline bool need_resched(void)
2262
2231
{
2263
2232
return unlikely(tif_need_resched());
+31
include/linux/spinlock.h
+31
include/linux/spinlock.h
···
449
449
return raw_spin_is_contended(&lock->rlock);
450
450
}
451
451
452
+
/*
453
+
* Does a critical section need to be broken due to another
454
+
* task waiting?: (technically does not depend on CONFIG_PREEMPTION,
455
+
* but a general need for low latency)
456
+
*/
457
+
static inline int spin_needbreak(spinlock_t *lock)
458
+
{
459
+
#ifdef CONFIG_PREEMPTION
460
+
return spin_is_contended(lock);
461
+
#else
462
+
return 0;
463
+
#endif
464
+
}
465
+
466
+
/*
467
+
* Check if a rwlock is contended.
468
+
* Returns non-zero if there is another task waiting on the rwlock.
469
+
* Returns zero if the lock is not contended or the system / underlying
470
+
* rwlock implementation does not support contention detection.
471
+
* Technically does not depend on CONFIG_PREEMPTION, but a general need
472
+
* for low latency.
473
+
*/
474
+
static inline int rwlock_needbreak(rwlock_t *lock)
475
+
{
476
+
#ifdef CONFIG_PREEMPTION
477
+
return rwlock_is_contended(lock);
478
+
#else
479
+
return 0;
480
+
#endif
481
+
}
482
+
452
483
#define assert_spin_locked(lock) assert_raw_spin_locked(&(lock)->rlock)
453
484
454
485
#else /* !CONFIG_PREEMPT_RT */