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 #define __LOCK(lock) \ 28 do { preempt_disable(); __acquire(lock); (void)(lock); } while (0) 29 30 #define __LOCK_BH(lock) \ 31 do { local_bh_disable(); __LOCK(lock); } while (0) 32 33 #define __LOCK_IRQ(lock) \ 34 do { local_irq_disable(); __LOCK(lock); } while (0) 35 36 #define __LOCK_IRQSAVE(lock, flags) \ 37 do { local_irq_save(flags); __LOCK(lock); } while (0) 38 39 #define __UNLOCK(lock) \ 40 do { preempt_enable(); __release(lock); (void)(lock); } while (0) 41 42 #define __UNLOCK_BH(lock) \ 43 do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0) 44 45 #define __UNLOCK_IRQ(lock) \ 46 do { local_irq_enable(); __UNLOCK(lock); } while (0) 47 48 #define __UNLOCK_IRQRESTORE(lock, flags) \ 49 do { local_irq_restore(flags); __UNLOCK(lock); } while (0) 50 51 #define _spin_lock(lock) __LOCK(lock) 52 #define _spin_lock_nested(lock, subclass) __LOCK(lock) 53 #define _read_lock(lock) __LOCK(lock) 54 #define _write_lock(lock) __LOCK(lock) 55 #define _spin_lock_bh(lock) __LOCK_BH(lock) 56 #define _read_lock_bh(lock) __LOCK_BH(lock) 57 #define _write_lock_bh(lock) __LOCK_BH(lock) 58 #define _spin_lock_irq(lock) __LOCK_IRQ(lock) 59 #define _read_lock_irq(lock) __LOCK_IRQ(lock) 60 #define _write_lock_irq(lock) __LOCK_IRQ(lock) 61 #define _spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 62 #define _read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 63 #define _write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 64 #define _spin_trylock(lock) ({ __LOCK(lock); 1; }) 65 #define _read_trylock(lock) ({ __LOCK(lock); 1; }) 66 #define _write_trylock(lock) ({ __LOCK(lock); 1; }) 67 #define _spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; }) 68 #define _spin_unlock(lock) __UNLOCK(lock) 69 #define _read_unlock(lock) __UNLOCK(lock) 70 #define _write_unlock(lock) __UNLOCK(lock) 71 #define _spin_unlock_bh(lock) __UNLOCK_BH(lock) 72 #define _write_unlock_bh(lock) __UNLOCK_BH(lock) 73 #define _read_unlock_bh(lock) __UNLOCK_BH(lock) 74 #define _spin_unlock_irq(lock) __UNLOCK_IRQ(lock) 75 #define _read_unlock_irq(lock) __UNLOCK_IRQ(lock) 76 #define _write_unlock_irq(lock) __UNLOCK_IRQ(lock) 77 #define _spin_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags) 78 #define _read_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags) 79 #define _write_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags) 80 81 #endif /* __LINUX_SPINLOCK_API_UP_H */ 82
