| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | #ifndef _LINUX_LIVEPATCH_SCHED_H_ |
| 3 | #define _LINUX_LIVEPATCH_SCHED_H_ |
| 4 | |
| 5 | #include <linux/jump_label.h> |
| 6 | #include <linux/sched.h> |
| 7 | |
| 8 | #ifdef CONFIG_LIVEPATCH |
| 9 | |
| 10 | void __klp_sched_try_switch(void); |
| 11 | |
| 12 | DECLARE_STATIC_KEY_FALSE(klp_sched_try_switch_key); |
| 13 | |
| 14 | static __always_inline void klp_sched_try_switch(struct task_struct *curr) |
| 15 | { |
| 16 | if (static_branch_unlikely(&klp_sched_try_switch_key) && |
| 17 | READ_ONCE(curr->__state) & TASK_FREEZABLE) |
| 18 | __klp_sched_try_switch(); |
| 19 | } |
| 20 | |
| 21 | #else /* !CONFIG_LIVEPATCH */ |
| 22 | static inline void klp_sched_try_switch(struct task_struct *curr) {} |
| 23 | #endif /* CONFIG_LIVEPATCH */ |
| 24 | |
| 25 | #endif /* _LINUX_LIVEPATCH_SCHED_H_ */ |
| 26 | |