811 	struct devkmsg_user *user = file->private_data;  in devkmsg_write()  local
815 	if (!user || len > LOG_LINE_MAX)  in devkmsg_write()
824 		if (!___ratelimit(&user->rs, current->comm))  in devkmsg_write()
871 	struct devkmsg_user *user = file->private_data;  in devkmsg_read()  local
876 	if (!user)  in devkmsg_read()
879 	ret = mutex_lock_interruptible(&user->lock);  in devkmsg_read()
884 	while (user->seq == log_next_seq) {  in devkmsg_read()
893 					       user->seq != log_next_seq);  in devkmsg_read()
899 	if (user->seq < log_first_seq) {  in devkmsg_read()
901 		user->idx = log_first_idx;  in devkmsg_read()
902 		user->seq = log_first_seq;  in devkmsg_read()
908 	msg = log_from_idx(user->idx);  in devkmsg_read()
909 	len = msg_print_ext_header(user->buf, sizeof(user->buf),  in devkmsg_read()
910 				   msg, user->seq);  in devkmsg_read()
911 	len += msg_print_ext_body(user->buf + len, sizeof(user->buf) - len,  in devkmsg_read()
915 	user->idx = log_next(user->idx);  in devkmsg_read()
916 	user->seq++;  in devkmsg_read()
924 	if (copy_to_user(buf, user->buf, len)) {  in devkmsg_read()
930 	mutex_unlock(&user->lock);  in devkmsg_read()
936 	struct devkmsg_user *user = file->private_data;  in devkmsg_llseek()  local
939 	if (!user)  in devkmsg_llseek()
948 		user->idx = log_first_idx;  in devkmsg_llseek()
949 		user->seq = log_first_seq;  in devkmsg_llseek()
957 		user->idx = clear_idx;  in devkmsg_llseek()
958 		user->seq = clear_seq;  in devkmsg_llseek()
962 		user->idx = log_next_idx;  in devkmsg_llseek()
963 		user->seq = log_next_seq;  in devkmsg_llseek()
974 	struct devkmsg_user *user = file->private_data;  in devkmsg_poll()  local
977 	if (!user)  in devkmsg_poll()
983 	if (user->seq < log_next_seq) {  in devkmsg_poll()
985 		if (user->seq < log_first_seq)  in devkmsg_poll()
997 	struct devkmsg_user *user;  in devkmsg_open()  local
1011 	user = kmalloc(sizeof(struct devkmsg_user), GFP_KERNEL);  in devkmsg_open()
1012 	if (!user)  in devkmsg_open()
1015 	ratelimit_default_init(&user->rs);  in devkmsg_open()
1016 	ratelimit_set_flags(&user->rs, RATELIMIT_MSG_ON_RELEASE);  in devkmsg_open()
1018 	mutex_init(&user->lock);  in devkmsg_open()
1021 	user->idx = log_first_idx;  in devkmsg_open()
1022 	user->seq = log_first_seq;  in devkmsg_open()
1025 	file->private_data = user;  in devkmsg_open()
1031 	struct devkmsg_user *user = file->private_data;  in devkmsg_release()  local
1033 	if (!user)  in devkmsg_release()
1036 	ratelimit_state_exit(&user->rs);  in devkmsg_release()
1038 	mutex_destroy(&user->lock);  in devkmsg_release()
1039 	kfree(user);  in devkmsg_release()