706 	struct devkmsg_user *user = file->private_data;  in devkmsg_write()  local
710 	if (!user || len > LOG_LINE_MAX)  in devkmsg_write()
719 		if (!___ratelimit(&user->rs, current->comm))  in devkmsg_write()
766 	struct devkmsg_user *user = file->private_data;  in devkmsg_read()  local
767 	struct printk_record *r = &user->record;  in devkmsg_read()
771 	if (!user)  in devkmsg_read()
774 	ret = mutex_lock_interruptible(&user->lock);  in devkmsg_read()
779 	if (!prb_read_valid(prb, user->seq, r)) {  in devkmsg_read()
788 					prb_read_valid(prb, user->seq, r));  in devkmsg_read()
794 	if (r->info->seq != user->seq) {  in devkmsg_read()
796 		user->seq = r->info->seq;  in devkmsg_read()
802 	len = info_print_ext_header(user->buf, sizeof(user->buf), r->info);  in devkmsg_read()
803 	len += msg_print_ext_body(user->buf + len, sizeof(user->buf) - len,  in devkmsg_read()
807 	user->seq = r->info->seq + 1;  in devkmsg_read()
815 	if (copy_to_user(buf, user->buf, len)) {  in devkmsg_read()
821 	mutex_unlock(&user->lock);  in devkmsg_read()
835 	struct devkmsg_user *user = file->private_data;  in devkmsg_llseek()  local
838 	if (!user)  in devkmsg_llseek()
847 		user->seq = prb_first_valid_seq(prb);  in devkmsg_llseek()
855 		user->seq = clear_seq;  in devkmsg_llseek()
859 		user->seq = prb_next_seq(prb);  in devkmsg_llseek()
870 	struct devkmsg_user *user = file->private_data;  in devkmsg_poll()  local
874 	if (!user)  in devkmsg_poll()
880 	if (prb_read_valid_info(prb, user->seq, &info, NULL)) {  in devkmsg_poll()
882 		if (info.seq != user->seq)  in devkmsg_poll()
894 	struct devkmsg_user *user;  in devkmsg_open()  local
908 	user = kmalloc(sizeof(struct devkmsg_user), GFP_KERNEL);  in devkmsg_open()
909 	if (!user)  in devkmsg_open()
912 	ratelimit_default_init(&user->rs);  in devkmsg_open()
913 	ratelimit_set_flags(&user->rs, RATELIMIT_MSG_ON_RELEASE);  in devkmsg_open()
915 	mutex_init(&user->lock);  in devkmsg_open()
917 	prb_rec_init_rd(&user->record, &user->info,  in devkmsg_open()
918 			&user->text_buf[0], sizeof(user->text_buf));  in devkmsg_open()
921 	user->seq = prb_first_valid_seq(prb);  in devkmsg_open()
924 	file->private_data = user;  in devkmsg_open()
930 	struct devkmsg_user *user = file->private_data;  in devkmsg_release()  local
932 	if (!user)  in devkmsg_release()
935 	ratelimit_state_exit(&user->rs);  in devkmsg_release()
937 	mutex_destroy(&user->lock);  in devkmsg_release()
938 	kfree(user);  in devkmsg_release()