Orange Pi5 kernel

#ifndef _ASM_POWERPC_MEMBARRIER_H
#define _ASM_POWERPC_MEMBARRIER_H
 
static inline void membarrier_arch_switch_mm(struct mm_struct *prev,
<------><------><------><------><------>     struct mm_struct *next,
<------><------><------><------><------>     struct task_struct *tsk)
{
<------>/*
<------> * Only need the full barrier when switching between processes.
<------> * Barrier when switching from kernel to userspace is not
<------> * required here, given that it is implied by mmdrop(). Barrier
<------> * when switching from userspace to kernel is not needed after
<------> * store to rq->curr.
<------> */
<------>if (likely(!(atomic_read(&next->membarrier_state) &
<------><------>     (MEMBARRIER_STATE_PRIVATE_EXPEDITED |
<------><------>      MEMBARRIER_STATE_GLOBAL_EXPEDITED)) || !prev))
<------><------>return;
 
<------>/*
<------> * The membarrier system call requires a full memory barrier
<------> * after storing to rq->curr, before going back to user-space.
<------> */
<------>smp_mb();
}
 
#endif /* _ASM_POWERPC_MEMBARRIER_H */