1 #ifndef __LINUX_SPINLOCK_TYPES_H 2 #define __LINUX_SPINLOCK_TYPES_H 3 4 /* 5 * include/linux/spinlock_types.h - generic spinlock type definitions 6 * and initializers 7 * 8 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar 9 * Released under the General Public License (GPL). 10 */ 11 12 #include <linux/spinlock_types_raw.h> 13 14 #ifndef CONFIG_PREEMPT_RT 15 16 /* Non PREEMPT_RT kernels map spinlock to raw_spinlock */ 17 typedef struct spinlock { 18 union { 19 struct raw_spinlock rlock; 20 21 #ifdef CONFIG_DEBUG_LOCK_ALLOC 22 # define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map)) 23 struct { 24 u8 __padding[LOCK_PADSIZE]; 25 struct lockdep_map dep_map; 26 }; 27 #endif 28 }; 29 } spinlock_t; 30 31 #define ___SPIN_LOCK_INITIALIZER(lockname) \ 32 { \ 33 .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \ 34 SPIN_DEBUG_INIT(lockname) \ 35 SPIN_DEP_MAP_INIT(lockname) } 36 37 #define __SPIN_LOCK_INITIALIZER(lockname) \ 38 { { .rlock = ___SPIN_LOCK_INITIALIZER(lockname) } } 39 40 #define __SPIN_LOCK_UNLOCKED(lockname) \ 41 (spinlock_t) __SPIN_LOCK_INITIALIZER(lockname) 42 43 #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) 44 45 #else /* !CONFIG_PREEMPT_RT */ 46 47 /* PREEMPT_RT kernels map spinlock to rt_mutex */ 48 #include <linux/rtmutex.h> 49 50 typedef struct spinlock { 51 struct rt_mutex_base lock; 52 #ifdef CONFIG_DEBUG_LOCK_ALLOC 53 struct lockdep_map dep_map; 54 #endif 55 } spinlock_t; 56 57 #define __SPIN_LOCK_UNLOCKED(name) \ 58 { \ 59 .lock = __RT_MUTEX_BASE_INITIALIZER(name.lock), \ 60 SPIN_DEP_MAP_INIT(name) \ 61 } 62 63 #define __LOCAL_SPIN_LOCK_UNLOCKED(name) \ 64 { \ 65 .lock = __RT_MUTEX_BASE_INITIALIZER(name.lock), \ 66 LOCAL_SPIN_DEP_MAP_INIT(name) \ 67 } 68 69 #define DEFINE_SPINLOCK(name) \ 70 spinlock_t name = __SPIN_LOCK_UNLOCKED(name) 71 72 #endif /* CONFIG_PREEMPT_RT */ 73 74 #include <linux/rwlock_types.h> 75 76 #endif /* __LINUX_SPINLOCK_TYPES_H */ 77