572 	struct devkmsg_user *user = file->private_data;  in devkmsg_read()  local
580 	if (!user)  in devkmsg_read()
583 	ret = mutex_lock_interruptible(&user->lock);  in devkmsg_read()
587 	while (user->seq == log_next_seq) {  in devkmsg_read()
596 					       user->seq != log_next_seq);  in devkmsg_read()
602 	if (user->seq < log_first_seq) {  in devkmsg_read()
604 		user->idx = log_first_idx;  in devkmsg_read()
605 		user->seq = log_first_seq;  in devkmsg_read()
611 	msg = log_from_idx(user->idx);  in devkmsg_read()
623 	if (msg->flags & LOG_CONT && !(user->prev & LOG_CONT))  in devkmsg_read()
626 		 ((user->prev & LOG_CONT) && !(msg->flags & LOG_PREFIX)))  in devkmsg_read()
629 	len = sprintf(user->buf, "%u,%llu,%llu,%c;",  in devkmsg_read()
631 		      user->seq, ts_usec, cont);  in devkmsg_read()
632 	user->prev = msg->flags;  in devkmsg_read()
639 			len += sprintf(user->buf + len, "\\x%02x", c);  in devkmsg_read()
641 			user->buf[len++] = c;  in devkmsg_read()
643 	user->buf[len++] = '\n';  in devkmsg_read()
652 				user->buf[len++] = ' ';  in devkmsg_read()
657 				user->buf[len++] = '\n';  in devkmsg_read()
663 				len += sprintf(user->buf + len, "\\x%02x", c);  in devkmsg_read()
667 			user->buf[len++] = c;  in devkmsg_read()
669 		user->buf[len++] = '\n';  in devkmsg_read()
672 	user->idx = log_next(user->idx);  in devkmsg_read()
673 	user->seq++;  in devkmsg_read()
681 	if (copy_to_user(buf, user->buf, len)) {  in devkmsg_read()
687 	mutex_unlock(&user->lock);  in devkmsg_read()
693 	struct devkmsg_user *user = file->private_data;  in devkmsg_llseek()  local
696 	if (!user)  in devkmsg_llseek()
705 		user->idx = log_first_idx;  in devkmsg_llseek()
706 		user->seq = log_first_seq;  in devkmsg_llseek()
714 		user->idx = clear_idx;  in devkmsg_llseek()
715 		user->seq = clear_seq;  in devkmsg_llseek()
719 		user->idx = log_next_idx;  in devkmsg_llseek()
720 		user->seq = log_next_seq;  in devkmsg_llseek()
731 	struct devkmsg_user *user = file->private_data;  in devkmsg_poll()  local
734 	if (!user)  in devkmsg_poll()
740 	if (user->seq < log_next_seq) {  in devkmsg_poll()
742 		if (user->seq < log_first_seq)  in devkmsg_poll()
754 	struct devkmsg_user *user;  in devkmsg_open()  local
766 	user = kmalloc(sizeof(struct devkmsg_user), GFP_KERNEL);  in devkmsg_open()
767 	if (!user)  in devkmsg_open()
770 	mutex_init(&user->lock);  in devkmsg_open()
773 	user->idx = log_first_idx;  in devkmsg_open()
774 	user->seq = log_first_seq;  in devkmsg_open()
777 	file->private_data = user;  in devkmsg_open()
783 	struct devkmsg_user *user = file->private_data;  in devkmsg_release()  local
785 	if (!user)  in devkmsg_release()
788 	mutex_destroy(&user->lock);  in devkmsg_release()
789 	kfree(user);  in devkmsg_release()