diff options
Diffstat (limited to 'include/linux/notifier.h')
| -rw-r--r-- | include/linux/notifier.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/notifier.h b/include/linux/notifier.h index 9431101bf876..fad7ff17e468 100644 --- a/include/linux/notifier.h +++ b/include/linux/notifier.h @@ -157,6 +157,19 @@ extern int __srcu_notifier_call_chain(struct srcu_notifier_head *nh, */ #define NOTIFY_STOP (NOTIFY_OK|NOTIFY_STOP_MASK) +/* Encapsulate (negative) errno value (in particular, NOTIFY_BAD <=> EPERM). */ +static inline int notifier_from_errno(int err) +{ + return NOTIFY_STOP_MASK | (NOTIFY_OK - err); +} + +/* Restore (negative) errno value from notify return value. */ +static inline int notifier_to_errno(int ret) +{ + ret &= ~NOTIFY_STOP_MASK; + return ret > NOTIFY_OK ? NOTIFY_OK - ret : 0; +} + /* * Declared notifiers so far. I can imagine quite a few more chains * over time (eg laptop power reset chains, reboot chain (to clean @@ -196,6 +209,8 @@ extern int __srcu_notifier_call_chain(struct srcu_notifier_head *nh, #define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */ #define CPU_LOCK_ACQUIRE 0x0008 /* Acquire all hotcpu locks */ #define CPU_LOCK_RELEASE 0x0009 /* Release all hotcpu locks */ +#define CPU_DYING 0x000A /* CPU (unsigned)v not running any task, + * not handling interrupts, soon dead */ /* Used for CPU hotplug events occuring while tasks are frozen due to a suspend * operation in progress @@ -208,6 +223,13 @@ extern int __srcu_notifier_call_chain(struct srcu_notifier_head *nh, #define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN) #define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN) #define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN) +#define CPU_DYING_FROZEN (CPU_DYING | CPU_TASKS_FROZEN) + +/* Hibernation and suspend events */ +#define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ +#define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ +#define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ +#define PM_POST_SUSPEND 0x0004 /* Suspend finished */ #endif /* __KERNEL__ */ #endif /* _LINUX_NOTIFIER_H */ |