Re: page_launder() bug

[Anuradha Ratnaweera]

On Mon, 7 May 2001, J . A . Magallon wrote:

> 
> On 05.07 Helge Hafting wrote:
> >
> > !0 is 1.  !(anything else) is 0.  It is zero and one, not
> > zero and "non-zero".  So a !! construction gives zero if you have
> > zero, and one if you had anything else.  There's no doubt about it.
> > >
> 
> Isn't this asking for trouble with the optimizer ? It could kill both
> !!. Using that is like trusting on a certain struct padding-alignment.
> 

It isn't, or rather it can't. Because !!x is not x unless x is one or
zero.

Anuradha

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