1#ifndef __LINUX_SPINLOCK_API_UP_H 2#define __LINUX_SPINLOCK_API_UP_H 3 4#ifndef __LINUX_SPINLOCK_H 5# error "please don't include this file directly" 6#endif 7 8/* 9 * include/linux/spinlock_api_up.h 10 * 11 * spinlock API implementation on UP-nondebug (inlined implementation) 12 * 13 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar 14 * Released under the General Public License (GPL). 15 */ 16 17#define in_lock_functions(ADDR) 0 18 19#define assert_spin_locked(lock) do { (void)(lock); } while (0) 20 21/* 22 * In the UP-nondebug case there's no real locking going on, so the 23 * only thing we have to do is to keep the preempt counts and irq 24 * flags straight, to supress compiler warnings of unused lock 25 * variables, and to add the proper checker annotations: 26 */ 27#ifdef CONFIG_PREEMPT 28#define __LOCK(lock) \ 29 do { preempt_disable(); __acquire(lock); (void)(lock); } while (0) 30#else /* CONFIG_PREEMPT */ 31#define __LOCK(lock) \ 32 (void)(lock) 33#endif 34 35#define __LOCK_BH(lock) \ 36 do { local_bh_disable(); __LOCK(lock); } while (0) 37 38#define __LOCK_IRQ(lock) \ 39 do { local_irq_disable(); __LOCK(lock); } while (0) 40 41#define __LOCK_IRQSAVE(lock, flags) \ 42 do { local_irq_save(flags); __LOCK(lock); } while (0) 43 44#ifdef CONFIG_PREEMPT 45#define __UNLOCK(lock) \ 46 do { preempt_enable(); __release(lock); (void)(lock); } while (0) 47#else 48#define __UNLOCK(lock) \ 49 do { } while(0) 50#endif 51 52#define __UNLOCK_BH(lock) \ 53 do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0) 54 55#define __UNLOCK_IRQ(lock) \ 56 do { local_irq_enable(); __UNLOCK(lock); } while (0) 57 58#define __UNLOCK_IRQRESTORE(lock, flags) \ 59 do { local_irq_restore(flags); __UNLOCK(lock); } while (0) 60 61#define _spin_lock(lock) __LOCK(lock) 62#define _spin_lock_nested(lock, subclass) __LOCK(lock) 63#define _read_lock(lock) __LOCK(lock) 64#define _write_lock(lock) __LOCK(lock) 65#define _spin_lock_bh(lock) __LOCK_BH(lock) 66#define _read_lock_bh(lock) __LOCK_BH(lock) 67#define _write_lock_bh(lock) __LOCK_BH(lock) 68#define _spin_lock_irq(lock) __LOCK_IRQ(lock) 69#define _read_lock_irq(lock) __LOCK_IRQ(lock) 70#define _write_lock_irq(lock) __LOCK_IRQ(lock) 71#define _spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 72#define _read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 73#define _write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 74#define _spin_trylock(lock) ({ __LOCK(lock); 1; }) 75#define _read_trylock(lock) ({ __LOCK(lock); 1; }) 76#define _write_trylock(lock) ({ __LOCK(lock); 1; }) 77#define _spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; }) 78#define _spin_unlock(lock) __UNLOCK(lock) 79#define _read_unlock(lock) __UNLOCK(lock) 80#define _write_unlock(lock) __UNLOCK(lock) 81#define _spin_unlock_bh(lock) __UNLOCK_BH(lock) 82#define _write_unlock_bh(lock) __UNLOCK_BH(lock) 83#define _read_unlock_bh(lock) __UNLOCK_BH(lock) 84#define _spin_unlock_irq(lock) __UNLOCK_IRQ(lock) 85#define _read_unlock_irq(lock) __UNLOCK_IRQ(lock) 86#define _write_unlock_irq(lock) __UNLOCK_IRQ(lock) 87#define _spin_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags) 88#define _read_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags) 89#define _write_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags) 90 91#endif /* __LINUX_SPINLOCK_API_UP_H */ 92