| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __ASM_ARM_SWITCH_TO_H |
| #define __ASM_ARM_SWITCH_TO_H |
| |
| #include <linux/thread_info.h> |
| |
| /* |
| * For v7 SMP cores running a preemptible kernel we may be pre-empted |
| * during a TLB maintenance operation, so execute an inner-shareable dsb |
| * to ensure that the maintenance completes in case we migrate to another |
| * CPU. |
| */ |
| #if defined(CONFIG_PREEMPTION) && defined(CONFIG_SMP) && defined(CONFIG_CPU_V7) |
| #define __complete_pending_tlbi() dsb(ish) |
| #else |
| #define __complete_pending_tlbi() |
| #endif |
| |
| /* |
| * switch_to(prev, next) should switch from task `prev' to `next' |
| * `prev' will never be the same as `next'. schedule() itself |
| * contains the memory barrier to tell GCC not to cache `current'. |
| */ |
| extern struct task_struct *__switch_to(struct task_struct *, struct thread_info *, struct thread_info *); |
| |
| #define switch_to(prev,next,last) \ |
| do { \ |
| __complete_pending_tlbi(); \ |
| last = __switch_to(prev,task_thread_info(prev), task_thread_info(next)); \ |
| } while (0) |
| |
| #endif /* __ASM_ARM_SWITCH_TO_H */ |
