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_raw_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 suppress compiler warnings of unused lock 25 * variables, and to add the proper checker annotations: 26 */ 27 #define ___LOCK(lock) \ 28 do { __acquire(lock); (void)(lock); } while (0) 29 30 #define __LOCK(lock) \ 31 do { preempt_disable(); ___LOCK(lock); } while (0) 32 33 #define __LOCK_BH(lock) \ 34 do { __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); ___LOCK(lock); } while (0) 35 36 #define __LOCK_IRQ(lock) \ 37 do { local_irq_disable(); __LOCK(lock); } while (0) 38 39 #define __LOCK_IRQSAVE(lock, flags) \ 40 do { local_irq_save(flags); __LOCK(lock); } while (0) 41 42 #define ___UNLOCK(lock) \ 43 do { __release(lock); (void)(lock); } while (0) 44 45 #define __UNLOCK(lock) \ 46 do { preempt_enable(); ___UNLOCK(lock); } while (0) 47 48 #define __UNLOCK_BH(lock) \ 49 do { __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); \ 50 ___UNLOCK(lock); } while (0) 51 52 #define __UNLOCK_IRQ(lock) \ 53 do { local_irq_enable(); __UNLOCK(lock); } while (0) 54 55 #define __UNLOCK_IRQRESTORE(lock, flags) \ 56 do { local_irq_restore(flags); __UNLOCK(lock); } while (0) 57 58 #define _raw_spin_lock(lock) __LOCK(lock) 59 #define _raw_spin_lock_nested(lock, subclass) __LOCK(lock) 60 #define _raw_read_lock(lock) __LOCK(lock) 61 #define _raw_write_lock(lock) __LOCK(lock) 62 #define _raw_spin_lock_bh(lock) __LOCK_BH(lock) 63 #define _raw_read_lock_bh(lock) __LOCK_BH(lock) 64 #define _raw_write_lock_bh(lock) __LOCK_BH(lock) 65 #define _raw_spin_lock_irq(lock) __LOCK_IRQ(lock) 66 #define _raw_read_lock_irq(lock) __LOCK_IRQ(lock) 67 #define _raw_write_lock_irq(lock) __LOCK_IRQ(lock) 68 #define _raw_spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 69 #define _raw_read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 70 #define _raw_write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags) 71 #define _raw_spin_trylock(lock) ({ __LOCK(lock); 1; }) 72 #define _raw_read_trylock(lock) ({ __LOCK(lock); 1; }) 73 #define _raw_write_trylock(lock) ({ __LOCK(lock); 1; }) 74 #define _raw_spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; }) 75 #define _raw_spin_unlock(lock) __UNLOCK(lock) 76 #define _raw_read_unlock(lock) __UNLOCK(lock) 77 #define _raw_write_unlock(lock) __UNLOCK(lock) 78 #define _raw_spin_unlock_bh(lock) __UNLOCK_BH(lock) 79 #define _raw_write_unlock_bh(lock) __UNLOCK_BH(lock) 80 #define _raw_read_unlock_bh(lock) __UNLOCK_BH(lock) 81 #define _raw_spin_unlock_irq(lock) __UNLOCK_IRQ(lock) 82 #define _raw_read_unlock_irq(lock) __UNLOCK_IRQ(lock) 83 #define _raw_write_unlock_irq(lock) __UNLOCK_IRQ(lock) 84 #define _raw_spin_unlock_irqrestore(lock, flags) \ 85 __UNLOCK_IRQRESTORE(lock, flags) 86 #define _raw_read_unlock_irqrestore(lock, flags) \ 87 __UNLOCK_IRQRESTORE(lock, flags) 88 #define _raw_write_unlock_irqrestore(lock, flags) \ 89 __UNLOCK_IRQRESTORE(lock, flags) 90 91 #endif /* __LINUX_SPINLOCK_API_UP_H */ 92