Re: [Dri-devel] DRM patch for Linux 2.4.0-prerelease

From: Keith Whitwell (keithw@valinux.com)
Date: Thu Jan 04 2001 - 16:27:22 EST


Rik,

It looks like this patch goes further than syncing with xfree 4.0.2, but syncs
with the dri trunk instead. There has been a version bump in the mga drm
module on the dri trunk to add a 'blit' ioctl. XFree 4.0.2 will barf on this.

As a broader question: All our version checking (in client drivers and DDX
drivers) check

        found major == expected major
        found minor == expected minor
        found patch >= expected patch

and if they don't receive this, they refuse to play.

As I understood it, the major number is bumped on backwards-incompatible
changes, the minor number on backwards-compatible changes and the patch on all
other changes, though in practise never.

Thus, wouldn't the appropriate test be:

        found major == expected major
        found minor >= expected minor
        (no test on patch)

This seems to match the semantics of the 3 numbers better?

Keith
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