percpu_down_write
percpu_down_write(&hu->proto_lock);
percpu_down_write(&EXT4_SB(sb)->s_writepages_rwsem);
percpu_down_write(&file_rwsem);
percpu_down_write(&kclist_lock);
percpu_down_write(sb->s_writers.rw_sem + level-1);
extern void percpu_down_write(struct percpu_rw_semaphore *);
percpu_down_write(_T), percpu_up_write(_T))
percpu_down_write(&cgroup_threadgroup_rwsem);
percpu_down_write(&cgroup_threadgroup_rwsem);
percpu_down_write(&cpu_hotplug_lock);
percpu_down_write(&bp_cpuinfo_sem);
percpu_down_write(&dup_mmap_sem);
percpu_down_write(&pcpu_rwsem);
EXPORT_SYMBOL_GPL(percpu_down_write);
percpu_down_write(&scx_cgroup_ops_rwsem);
percpu_down_write(&scx_fork_rwsem);
percpu_down_write(&scx_fork_rwsem);
percpu_down_write(&scx_fork_rwsem);
percpu_down_write(&mem_hotplug_lock);