Re: page_launder() bug

[J . A . Magallon]

On 05.07 Helge Hafting wrote:
> Tobias Ringstrom wrote:
> > 
> > On Sun, 6 May 2001, David S. Miller wrote:
> > > It is the most straightforward way to make a '1' or '0'
> > > integer from the NULL state of a pointer.
> > 
> > But is it really specified in the C "standards" to be exctly zero or one,
> > and not zero and non-zero?
> 
> !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.

-- 
J.A. Magallon                           #  Let the source be with you...        
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