Help with a bug in mmap

[Siddharth Muralee <siddharth.muralee%gmail.com@localhost>]

Hello All,
    I have recently been working on porting the kcov(4) feature to NetBSD.
The feature comes as a /dev module. I have been stuck for a while with the
mmap() function of the device. I have been trying to populate a buffer from
the module and then pass it to the userspace program.

The mmap function of the device is here
<https://github.com/R3x/src/blob/32806c3abfcfb5e82d1a0c69e00749ef97fdaf21/sys/dev/kcov.c#L205>
and the function populating the buffer is here
<https://github.com/R3x/src/blob/32806c3abfcfb5e82d1a0c69e00749ef97fdaf21/sys/dev/kcov.c#L86>