diff options
Diffstat (limited to 'include/linux/unwind_deferred.h')
| -rw-r--r-- | include/linux/unwind_deferred.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/unwind_deferred.h b/include/linux/unwind_deferred.h index baacf4a1eb4c..14efd8c027aa 100644 --- a/include/linux/unwind_deferred.h +++ b/include/linux/unwind_deferred.h @@ -2,9 +2,19 @@ #ifndef _LINUX_UNWIND_USER_DEFERRED_H #define _LINUX_UNWIND_USER_DEFERRED_H +#include <linux/task_work.h> #include <linux/unwind_user.h> #include <linux/unwind_deferred_types.h> +struct unwind_work; + +typedef void (*unwind_callback_t)(struct unwind_work *work, struct unwind_stacktrace *trace, u64 cookie); + +struct unwind_work { + struct list_head list; + unwind_callback_t func; +}; + #ifdef CONFIG_UNWIND_USER void unwind_task_init(struct task_struct *task); @@ -12,8 +22,19 @@ void unwind_task_free(struct task_struct *task); int unwind_user_faultable(struct unwind_stacktrace *trace); +int unwind_deferred_init(struct unwind_work *work, unwind_callback_t func); +int unwind_deferred_request(struct unwind_work *work, u64 *cookie); +void unwind_deferred_cancel(struct unwind_work *work); + static __always_inline void unwind_reset_info(void) { + if (unlikely(current->unwind_info.id.id)) + current->unwind_info.id.id = 0; + /* + * As unwind_user_faultable() can be called directly and + * depends on nr_entries being cleared on exit to user, + * this needs to be a separate conditional. + */ if (unlikely(current->unwind_info.cache)) current->unwind_info.cache->nr_entries = 0; } @@ -24,6 +45,9 @@ static inline void unwind_task_init(struct task_struct *task) {} static inline void unwind_task_free(struct task_struct *task) {} static inline int unwind_user_faultable(struct unwind_stacktrace *trace) { return -ENOSYS; } +static inline int unwind_deferred_init(struct unwind_work *work, unwind_callback_t func) { return -ENOSYS; } +static inline int unwind_deferred_request(struct unwind_work *work, u64 *timestamp) { return -ENOSYS; } +static inline void unwind_deferred_cancel(struct unwind_work *work) {} static inline void unwind_reset_info(void) {} |