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From: "Norbert Koch" <NKoch@demig.de>
To: "Freebsd-Hackers@Freebsd. Org" <freebsd-hackers@freebsd.org>
Date: Fri, 3 Jun 2005 14:03:56 +0200
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Subject: O_NONBLOCK vs IO_NDELAY: what to use where?
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Hello.

In releng-4 the device driver's
read/write functions check for
non-blocking i/o using
  (flag & IO_NDELAY)
Is that changed in current to
O_NONBLOCK?

As I understand:

#include <vnode.h>
IO_NDELAY
for releng-4

and

#include <fcntl.h>
O_NONBLOCK
for current.

Correct?
If yes, what exact version should I test for?

Thank you,

Norbert Koch