663 	struct devkmsg_user *user = file->private_data;  in devkmsg_write()  local
667 	if (!user || len > LOG_LINE_MAX)  in devkmsg_write()
676 		if (!___ratelimit(&user->rs, current->comm))  in devkmsg_write()
722 	struct devkmsg_user *user = file->private_data;  in devkmsg_read()  local
723 	struct printk_record *r = &user->record;  in devkmsg_read()
727 	if (!user)  in devkmsg_read()
730 	ret = mutex_lock_interruptible(&user->lock);  in devkmsg_read()
734 	if (!prb_read_valid(prb, atomic64_read(&user->seq), r)) {  in devkmsg_read()
752 					atomic64_read(&user->seq), r)); /* LMM(devkmsg_read:A) */  in devkmsg_read()
757 	if (r->info->seq != atomic64_read(&user->seq)) {  in devkmsg_read()
759 		atomic64_set(&user->seq, r->info->seq);  in devkmsg_read()
764 	len = info_print_ext_header(user->buf, sizeof(user->buf), r->info);  in devkmsg_read()
765 	len += msg_print_ext_body(user->buf + len, sizeof(user->buf) - len,  in devkmsg_read()
769 	atomic64_set(&user->seq, r->info->seq + 1);  in devkmsg_read()
776 	if (copy_to_user(buf, user->buf, len)) {  in devkmsg_read()
782 	mutex_unlock(&user->lock);  in devkmsg_read()
796 	struct devkmsg_user *user = file->private_data;  in devkmsg_llseek()  local
799 	if (!user)  in devkmsg_llseek()
807 		atomic64_set(&user->seq, prb_first_valid_seq(prb));  in devkmsg_llseek()
815 		atomic64_set(&user->seq, latched_seq_read_nolock(&clear_seq));  in devkmsg_llseek()
819 		atomic64_set(&user->seq, prb_next_seq(prb));  in devkmsg_llseek()
829 	struct devkmsg_user *user = file->private_data;  in devkmsg_poll()  local
833 	if (!user)  in devkmsg_poll()
838 	if (prb_read_valid_info(prb, atomic64_read(&user->seq), &info, NULL)) {  in devkmsg_poll()
840 		if (info.seq != atomic64_read(&user->seq))  in devkmsg_poll()
851 	struct devkmsg_user *user;  in devkmsg_open()  local
865 	user = kvmalloc(sizeof(struct devkmsg_user), GFP_KERNEL);  in devkmsg_open()
866 	if (!user)  in devkmsg_open()
869 	ratelimit_default_init(&user->rs);  in devkmsg_open()
870 	ratelimit_set_flags(&user->rs, RATELIMIT_MSG_ON_RELEASE);  in devkmsg_open()
872 	mutex_init(&user->lock);  in devkmsg_open()
874 	prb_rec_init_rd(&user->record, &user->info,  in devkmsg_open()
875 			&user->text_buf[0], sizeof(user->text_buf));  in devkmsg_open()
877 	atomic64_set(&user->seq, prb_first_valid_seq(prb));  in devkmsg_open()
879 	file->private_data = user;  in devkmsg_open()
885 	struct devkmsg_user *user = file->private_data;  in devkmsg_release()  local
887 	if (!user)  in devkmsg_release()
890 	ratelimit_state_exit(&user->rs);  in devkmsg_release()
892 	mutex_destroy(&user->lock);  in devkmsg_release()
893 	kvfree(user);  in devkmsg_release()