kernel dev_t elimination patch for review

Robert Watson rwatson at
Fri Jun 11 12:53:53 GMT 2004

On Fri, 11 Jun 2004, Poul-Henning Kamp wrote:

> This patch changes "dev_t" in the kernel to "struct cdev *"
> and is 337K of boredom like:
> 	-static dev_t perfdev;
> 	+static struct cdev *perfdev;
> People who maintain cross-platform or cross-version source code in the
> kernel, should take a close look at this patch. 
> If you don't like the way I have done it (which is mostly automated) 
> you are more than welcome to commit your own patch, all you have to do
> is use "struct cdev *" instead of "dev_t", and you can do that already
> now. 
> In about a week or so, I will commit the remaining bits of this patch. 

It looks reasonable to me, although bde will no doubt point out there are
a couple of places where function declarations get too long for a line,
comments don't line up, etc.

Do you plan to eliminate udev_t in a following step and return it to
dev_t?  There are some positive and negative aspecets of doing so relating
to cross-platform compatibility, one suspects, but it would be nice for
consistency purposes now that the kernel dev_t is gone.

Looks good!

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert at      Senior Research Scientist, McAfee Research

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