diff options
Diffstat (limited to 'include/linux/freezer.h')
| -rw-r--r-- | include/linux/freezer.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/include/linux/freezer.h b/include/linux/freezer.h index 1effc8b56b4e..a49b52934c55 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -49,6 +49,7 @@ extern int thaw_process(struct task_struct *p); extern void refrigerator(void); extern int freeze_processes(void); +extern int freeze_kernel_threads(void); extern void thaw_processes(void); static inline int try_to_freeze(void) @@ -134,10 +135,25 @@ static inline void set_freezable_with_signal(void) } /* - * Freezer-friendly wrappers around wait_event_interruptible() and - * wait_event_interruptible_timeout(), originally defined in <linux/wait.h> + * Freezer-friendly wrappers around wait_event_interruptible(), + * wait_event_killable() and wait_event_interruptible_timeout(), originally + * defined in <linux/wait.h> */ +#define wait_event_freezekillable(wq, condition) \ +({ \ + int __retval; \ + do { \ + __retval = wait_event_killable(wq, \ + (condition) || freezing(current)); \ + if (__retval && !freezing(current)) \ + break; \ + else if (!(condition)) \ + __retval = -ERESTARTSYS; \ + } while (try_to_freeze()); \ + __retval; \ +}) + #define wait_event_freezable(wq, condition) \ ({ \ int __retval; \ @@ -171,7 +187,8 @@ static inline void clear_freeze_flag(struct task_struct *p) {} static inline int thaw_process(struct task_struct *p) { return 1; } static inline void refrigerator(void) {} -static inline int freeze_processes(void) { BUG(); return 0; } +static inline int freeze_processes(void) { return -ENOSYS; } +static inline int freeze_kernel_threads(void) { return -ENOSYS; } static inline void thaw_processes(void) {} static inline int try_to_freeze(void) { return 0; } @@ -188,6 +205,9 @@ static inline void set_freezable_with_signal(void) {} #define wait_event_freezable_timeout(wq, condition, timeout) \ wait_event_interruptible_timeout(wq, condition, timeout) +#define wait_event_freezekillable(wq, condition) \ + wait_event_killable(wq, condition) + #endif /* !CONFIG_FREEZER */ #endif /* FREEZER_H_INCLUDED */ |