Am Montag 13 August 2007 schrieb Alan Cox:
> On Mon, 13 Aug 2007 15:48:40 +0200
> Oliver Neukum <[EMAIL PROTECTED]> wrote:
>
> > Am Montag 13 August 2007 schrieb Alan Cox:
> > > +static int iuu_alloc_buf(struct iuu_private *priv)
> > > > +{
> > > > + priv->buf = kzalloc(256, GFP_KERNEL);
> > > > + priv->dbgbuf = kzalloc(256, GFP_KERNEL);
> > > > + priv->writebuf = kzalloc(256, GFP_KERNEL);
> > > > + if (!priv->buf || !priv->dbgbuf || !priv->writebuf) {
> > > > + dbg("%s problem allocation buffer", __FUNCTION__);
> > > > + return -ENOMEM;
> > > > + }
> > > > + return 0;
> > > > +}
> > > >
> > >
> > >
> > > Given they have the same lifetime what is wrong with simply putting them
> > > in struct iuu_private as arrays ?
> >
> > Alignment issue for the architectures which don't have cache consistent DMA.
>
> Is using __cacheline_aligned not sufficient for that ?
I think so. You'd need to ask the dma layer guys for a definitive answer.
However, is it simpler?
Regards
Oliver
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