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 18struct notifier_block { 19 int (*notifier_call)(struct notifier_block *, unsigned long, void *); 20 struct notifier_block *next; 21 int priority; 22}; 23 24struct atomic_notifier_head { 25 spinlock_t lock; 26 struct notifier_block *head; 27}; 28 29struct blocking_notifier_head { 30 struct rw_semaphore rwsem; 31 struct notifier_block *head; 32}; 33 34struct 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