Re: arca-1-against-pre-2.1.127-3
Linus Torvalds (torvalds@transmeta.com)
31 Oct 1998 18:34:53 GMT
In article <Pine.LNX.4.02A.9810311434520.242-100000@mikeg.weiden.de>,
Mike Galbraith <mikeg@weiden.de> wrote:
>
>--- include/linux/timer.h.org Sat Oct 31 09:08:31 1998
>+++ include/linux/timer.h Sat Oct 31 09:38:17 1998
>@@ -99,4 +99,8 @@
> return((long)((a) - (b)) >= 0L);
> }
>
>+extern inline unsigned long time_delta(unsigned long now, unsigned long then)
>+{
>+ return now < then ? ~then + now + 1 : now - then;
>+}
> #endif
One of us must be on drugs. As far as I can tell, the above is
equivalent to unconditionally doing
"now - then"
except your version is much stranger.
Correct me if I'm wrong, but (~then+1) == -then in two's complement (and
nothing else matters), so (~then+now+1) is the same as (now-then).
Linus
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