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 #if defined(CONFIG_SMP) 13 # include <asm/spinlock_types.h> 14 #else 15 # include <linux/spinlock_types_up.h> 16 #endif 17 18 #include <linux/lockdep.h> 19 20 typedef struct raw_spinlock { 21 arch_spinlock_t raw_lock; 22 #ifdef CONFIG_GENERIC_LOCKBREAK 23 unsigned int break_lock; 24 #endif 25 #ifdef CONFIG_DEBUG_SPINLOCK 26 unsigned int magic, owner_cpu; 27 void *owner; 28 #endif 29 #ifdef CONFIG_DEBUG_LOCK_ALLOC 30 struct lockdep_map dep_map; 31 #endif 32 } raw_spinlock_t; 33 34 #define SPINLOCK_MAGIC 0xdead4ead 35 36 #define SPINLOCK_OWNER_INIT ((void *)-1L) 37 38 #ifdef CONFIG_DEBUG_LOCK_ALLOC 39 # define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } 40 #else 41 # define SPIN_DEP_MAP_INIT(lockname) 42 #endif 43 44 #ifdef CONFIG_DEBUG_SPINLOCK 45 # define SPIN_DEBUG_INIT(lockname) \ 46 .magic = SPINLOCK_MAGIC, \ 47 .owner_cpu = -1, \ 48 .owner = SPINLOCK_OWNER_INIT, 49 #else 50 # define SPIN_DEBUG_INIT(lockname) 51 #endif 52 53 #define __RAW_SPIN_LOCK_INITIALIZER(lockname) \ 54 { \ 55 .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \ 56 SPIN_DEBUG_INIT(lockname) \ 57 SPIN_DEP_MAP_INIT(lockname) } 58 59 #define __RAW_SPIN_LOCK_UNLOCKED(lockname) \ 60 (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname) 61 62 #define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x) 63 64 typedef struct spinlock { 65 union { 66 struct raw_spinlock rlock; 67 68 #ifdef CONFIG_DEBUG_LOCK_ALLOC 69 # define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map)) 70 struct { 71 u8 __padding[LOCK_PADSIZE]; 72 struct lockdep_map dep_map; 73 }; 74 #endif 75 }; 76 } spinlock_t; 77 78 #define __SPIN_LOCK_INITIALIZER(lockname) \ 79 { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } } 80 81 #define __SPIN_LOCK_UNLOCKED(lockname) \ 82 (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname) 83 84 #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) 85 86 #include <linux/rwlock_types.h> 87 88 #endif /* __LINUX_SPINLOCK_TYPES_H */ 89