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From: cpcahil@virtech.UUCP (Conor P. Cahill)
Newsgroups: comp.unix.questions
Subject: Re: Motorolla Unix Device Drivers
Keywords: Driver
Message-ID: <1184@virtech.UUCP>
Date: 20 Sep 89 02:54:38 GMT
References: <232@melpar.UUCP>
Organization: Virtual Technologies Inc
Lines: 21

In article <232@melpar.UUCP>, dan@melpar.UUCP (Dan Pawlowski) writes:
> 1. I am writing a Unix driver for a DMA device under system 5 release 3.
>    (Motorolla 68030-MVME147).
>    Is there any way to get to the strategy routine without calling it
> explicitly from the write routine. Somehow I am getting to my strategy routine
> from my application, by calling write, but not actually entering the write
> entry point. Does anyone have an idea on what is happening? 	

The strategy routine is normally used by the block i/o routines when a 
"dirty" block needs to be flushed.  This would be asynchronous to writes.

For block devices, the read/write system call operations will be performed
by the system block i/o routines, not the device driver read/write routines.
For character devices the device driver read/write routines will be used.


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| Conor P. Cahill     uunet!virtech!cpcahil      	703-430-9247	!
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