Re: [Xen-devel] RFC: 32 bits as smallest atomic size.

[David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>]

Keir Fraser wrote:
> On 27 Mar 2005, at 00:27, David Hopwood wrote:
> > Keir Fraser wrote:
> > > On 26 Mar 2005, at 17:31, Jimi Xenidis wrote:
> > >
> > > > > > Few things to note:
> > > > > > 1) packed is [un]necessary since the ABI will do the right thing
> > > I prefer to pack things explicitly rather than rely on ABI padding.
> > If you use -Wpadded when compiling with gcc then you're not relying on
> > ABI padding; you're automatically checking that it is not used. That
> > would seem to be precisely what is required here.
> If I could specify it on a per-struct basis then it would be perfect.
There is no way to selectively enable/disable warnings in gcc:
<http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9049>  :-(

OTOH, spurious warnings for padding in private structures cause no real
harm. If only a few private structures are involved, you could add dummy
padding to those anyway.

--
David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>



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