43 static inline struct mutex *kernfs_open_file_mutex_ptr(struct kernfs_node *kn)  in kernfs_open_file_mutex_ptr()
50 static inline struct mutex *kernfs_open_file_mutex_lock(struct kernfs_node *kn)  in kernfs_open_file_mutex_lock()
52 	struct mutex *lock;  in kernfs_open_file_mutex_lock()
100  * the caller guarantees that this mutex is being held, other updaters can't
169 	 * @of->mutex nests outside active ref and is primarily to ensure that  in kernfs_seq_start()
172 	mutex_lock(&of->mutex);  in kernfs_seq_start()
214 	mutex_unlock(&of->mutex);  in kernfs_seq_stop()
255 	 * @of->mutex nests outside active ref and is used both to ensure that  in kernfs_file_read_iter()
258 	mutex_lock(&of->mutex);  in kernfs_file_read_iter()
261 		mutex_unlock(&of->mutex);  in kernfs_file_read_iter()
274 	mutex_unlock(&of->mutex);  in kernfs_file_read_iter()
340 	 * @of->mutex nests outside active ref and is used both to ensure that  in kernfs_fop_write_iter()
343 	mutex_lock(&of->mutex);  in kernfs_fop_write_iter()
345 		mutex_unlock(&of->mutex);  in kernfs_fop_write_iter()
357 	mutex_unlock(&of->mutex);  in kernfs_fop_write_iter()
464 	 * mmap path and of->mutex are prone to triggering spurious lockdep  in kernfs_fop_mmap()
467 	 * without grabbing @of->mutex by testing HAS_MMAP flag.  See the  in kernfs_fop_mmap()
473 	mutex_lock(&of->mutex);  in kernfs_fop_mmap()
513 	mutex_unlock(&of->mutex);  in kernfs_fop_mmap()
536 	struct mutex *mutex;  in kernfs_get_open_node()  local
538 	mutex = kernfs_open_file_mutex_lock(kn);  in kernfs_get_open_node()
545 			mutex_unlock(mutex);  in kernfs_get_open_node()
558 	mutex_unlock(mutex);  in kernfs_get_open_node()
581 	struct mutex *mutex;  in kernfs_unlink_open_file()  local
583 	mutex = kernfs_open_file_mutex_lock(kn);  in kernfs_unlink_open_file()
587 		mutex_unlock(mutex);  in kernfs_unlink_open_file()
607 	mutex_unlock(mutex);  in kernfs_unlink_open_file()
647 	 * @of->mutex for files which implement mmap.  This is a rather  in kernfs_fop_open()
649 	 * mm->mmap_lock - mmap nests @of->mutex under mm->mmap_lock and  in kernfs_fop_open()
651 	 * which mm->mmap_lock nests, while holding @of->mutex.  As each  in kernfs_fop_open()
652 	 * open file has a separate mutex, it's okay as long as those don't  in kernfs_fop_open()
663 	 * look that way and give @of->mutex different static lockdep keys.  in kernfs_fop_open()
666 		mutex_init(&of->mutex);  in kernfs_fop_open()
668 		mutex_init(&of->mutex);  in kernfs_fop_open()
670 		mutex_init(&of->mutex);  in kernfs_fop_open()
723 		/* nobody has access to @of yet, skip @of->mutex */  in kernfs_fop_open()
752 	 * @kernfs_open_file_mutex_ptr(kn) is enough. @of->mutex can't be used  in kernfs_release_file()
776 		struct mutex *mutex;  in kernfs_fop_release()  local
778 		mutex = kernfs_open_file_mutex_lock(kn);  in kernfs_fop_release()
780 		mutex_unlock(mutex);  in kernfs_fop_release()
815 	struct mutex *mutex;  in kernfs_drain_open_files()  local
817 	mutex = kernfs_open_file_mutex_lock(kn);  in kernfs_drain_open_files()
820 		mutex_unlock(mutex);  in kernfs_drain_open_files()
838 	mutex_unlock(mutex);  in kernfs_drain_open_files()
892 	 * @of->mutex nests outside active ref and is primarily to ensure that  in kernfs_fop_llseek()
895 	mutex_lock(&of->mutex);  in kernfs_fop_llseek()
897 		mutex_unlock(&of->mutex);  in kernfs_fop_llseek()
908 	mutex_unlock(&of->mutex);  in kernfs_fop_llseek()