Re: [patch 2.6.13-rc3] i386: clean up user_mode macros
From: Andrew Morton
Date: Mon Jul 25 2005 - 20:36:49 EST
Miles Bader <miles@xxxxxxxxxxxxx> wrote:
> Linus Torvalds <torvalds@xxxxxxxx> writes:
> > Ask a hundred random C programmers what "!!x" means, versus what "x != 0"
> > means, and time their replies.
> I've always thought of "!!" as the "canonicalize boolean" operator...
Me too. Once you get used to it, it's just the "convert non-zero to 1"
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