Interface for communicating from kernel to user mode

Peter Skvarka <[email protected]>
Newsgroups gmane.os.netbsd.devel.kernel
Message-ID <[email protected]> 
Hello,
what is suitable interface or mechanism on NetBSD to send message with 
some data from kernel-mode code to user-mode process ?
For example in the past on Linux I used on call nlmsg_unicast(socket, 
buffer, pid) to send data to some user-mode process.
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