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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980/* SPDX-License-Identifier: GPL-2.0 */#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>
#ifdef CONFIG_UNWIND_USER
enum { UNWIND_PENDING_BIT = 0, UNWIND_USED_BIT,};
enum { UNWIND_PENDING = BIT(UNWIND_PENDING_BIT),
/* Set if the unwinding was used (directly or deferred) */ UNWIND_USED = BIT(UNWIND_USED_BIT)};
void unwind_task_init(struct task_struct *task);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);
void unwind_deferred_task_exit(struct task_struct *task);
static __always_inline void unwind_reset_info(void){ struct unwind_task_info *info = ¤t->unwind_info; unsigned long bits = atomic_long_read(&info->unwind_mask);
/* Was there any unwinding? */ if (likely(!bits)) return;
do { /* Is a task_work going to run again before going back */ if (bits & UNWIND_PENDING) return; } while (!atomic_long_try_cmpxchg(&info->unwind_mask, &bits, 0UL)); current->unwind_info.id.id = 0;
if (unlikely(info->cache)) { info->cache->nr_entries = 0; info->cache->unwind_completed = 0; }}
#else /* !CONFIG_UNWIND_USER */
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 intunwind_deferred_init(struct unwind_work *work, unwind_callback_t func){ return -ENOSYS; }
static inline intunwind_deferred_request(struct unwind_work *work, u64 *timestamp){ return -ENOSYS; }
static inline void unwind_deferred_cancel(struct unwind_work *work) {}
static inline void unwind_deferred_task_exit(struct task_struct *task) {}static inline void unwind_reset_info(void) {}
#endif /* !CONFIG_UNWIND_USER */
#endif /* _LINUX_UNWIND_USER_DEFERRED_H */