Another 4.x ABI question; uidinfo

From: Mike Silbersack (silby_at_silby.com)
Date: 08/02/03

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    Date: Sat, 2 Aug 2003 01:04:09 -0500 (CDT)
To: arch@freebsd.org

    Ok, so I took another at the uidinfo ui_ref field being only a u_short in
    4.x. As I recall, the reason this was not changed to a u_int was binary
    compatibility... however, as I look around the source tree, it appears
    that the only places uidinfos are used are within kern/, and then
    generally only by things touching procs. Thirdly, it appears that the
    refcount is only modified within three functions in kern_resource.c, and
    that ui_ref is the last member in that structure.

    So, is there _really_ a problem in promoting ui_ref to an int from a
    short? As far as I can tell, any network or sound driver should be
    completely insulated from such a change; do we have any other class of
    binary modules to worry about?

    Thanks,

    Mike "Silby" Silbersack
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