mmap device-drivers

[Poul-Henning Kamp]

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In message <20170314090905.GA94880 at freebsd-t420.fritz.box>, Manuel =?iso-8859-1
?Q?St=FChn?= writes:

>is it possible for a device driver to keep track if there are still
>active mmap() pointers pointing to that device?

I looked at this back in PCMCIA days and it was not possible, and my
attempts to implement it did not succeed.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.