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_NOTIFIER_H 13 #define _LINUX_NOTIFIER_H 14 #include <linux/errno.h> 15 #include <linux/mutex.h> 16 #include <linux/rwsem.h> 17 18 struct notifier_block { 19 int (*notifier_call)(struct notifier_block *, unsigned long, void *); 20 struct notifier_block *next; 21 int priority; 22 }; 23 24 struct atomic_notifier_head { 25 spinlock_t lock; 26 struct notifier_block *head; 27 }; 28 29 struct blocking_notifier_head { 30 struct rw_semaphore rwsem; 31 struct notifier_block *head; 32 }; 33 34 struct raw_notifier_head { 35 struct notifier_block *head; 36 }; 37 38 #define ATOMIC_INIT_NOTIFIER_HEAD(name) do { spin_lock_init(&(name)->lock); (name)->head = NULL; } while (0) 39 #define BLOCKING_INIT_NOTIFIER_HEAD(name) do { init_rwsem(&(name)->rwsem); (name)->head = NULL; } while (0) 40 #define RAW_INIT_NOTIFIER_HEAD(name) do { (name)->head = NULL; } while (0) 41 42 #define ATOMIC_NOTIFIER_INIT(name) { .lock = __SPIN_LOCK_UNLOCKED(name.lock), .head = NULL } 43 #define BLOCKING_NOTIFIER_INIT(name) { .rwsem = __RWSEM_INITIALIZER((name).rwsem), .head = NULL } 44 #define RAW_NOTIFIER_INIT(name) { .head = NULL } 45 46 #define ATOMIC_NOTIFIER_HEAD(name) struct atomic_notifier_head name = ATOMIC_NOTIFIER_INIT(name) 47 #define BLOCKING_NOTIFIER_HEAD(name) struct blocking_notifier_head name = BLOCKING_NOTIFIER_INIT(name) 48 #define RAW_NOTIFIER_HEAD(name) struct raw_notifier_head name = RAW_NOTIFIER_INIT(name) 49 50 #endif 51