kernel function call from user space

Hi,

 

I want to know how my kernel level functions map to user space in
comedilib.

Assuming I have a function (mydriver_read_scan_buffer) in kernel space
in my driver. I have seen that this function needs to be linked to
comedi_subdevice structure in the attach function of the driver. 

Please someone help as to how this function gets called in the user
library or through comedilib APIs.

 

Thanks,

Shalini

 

"This e-mail, and any attachments thereto, are intended only for use by
the addressee(s) named herein and may contain privileged and/or
confidential information. If you are not the intended recipient of this
e-mail, you are hereby notified that any dissemination, distribution or
copying of this e-mail, and any attachments thereto, is illegal and
strictly prohibited. If you have received this e-mail in error, please
immediately notify me by telephone and permanently delete the original
and any copy of any e-mail and any printout thereof."