lkml.org 
[lkml]   [2003]   [Feb]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] make jiffies wrap 5 min after boot
From
Date
Muli Ben-Yehuda <mulix@mulix.org> writes:

> On Sun, Feb 16, 2003 at 01:37:40AM -0500, Robert Love wrote:
> > On Sat, 2003-02-15 at 21:43, William Lee Irwin III wrote:
> >
> > > Can I get a vote for ~0UL instead of -1UL?
> >
> > OK, I bite. What is the difference? Aren't both equivalent?
>
> I have no idea if that's what wli meant, but -1UL is only "all ones"
> in a 2's complement binary representation.

No. Wraparound of unsigned types is well-defined. -1UL must be the
largest possible unsigned long value, which must consist of only 1
bits (except for possible padding bits).

Of course, no machines with ones-complement (or padding bits, or
integer trap representations, or any of the other ISO braindamages)
exist, so this is mostly irrelevant anyway.

--
Falk
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.681 / U:0.912 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site