1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __LINUX_MUTEX_H 13 #define __LINUX_MUTEX_H 14 15 #include <linux/list.h> 16 #include <linux/spinlock_types.h> 17 #include <linux/linkage.h> 18 #include <linux/lockdep.h> 19 20 #include <asm/atomic.h> 21 22 struct mutex { 23 24 atomic_t count; 25 spinlock_t wait_lock; 26 struct list_head wait_list; 27 }; 28 29 struct mutex_waiter { 30 struct list_head list; 31 struct task_struct *task; 32 }; 33 34 #define __DEBUG_MUTEX_INITIALIZER(lockname) 35 #define mutex_init(mutex) do { static struct lock_class_key __key; __mutex_init((mutex), #mutex, &__key); } while (0) 36 #define mutex_destroy(mutex) do { } while (0) 37 38 #define __DEP_MAP_MUTEX_INITIALIZER(lockname) 39 40 #define __MUTEX_INITIALIZER(lockname) { .count = ATOMIC_INIT(1) , .wait_lock = SPIN_LOCK_UNLOCKED , .wait_list = LIST_HEAD_INIT(lockname.wait_list) __DEBUG_MUTEX_INITIALIZER(lockname) __DEP_MAP_MUTEX_INITIALIZER(lockname) } 41 42 #define DEFINE_MUTEX(mutexname) struct mutex mutexname = __MUTEX_INITIALIZER(mutexname) 43 44 #define mutex_lock_nested(lock, subclass) mutex_lock(lock) 45 46 #endif 47