On Wed, Dec 31, 2003 at 11:36:26AM -0700, Justin T. Gibbs wrote:
> > consistent memory ALWAYS comes from lower 4Gb regardless of the
> > pci_set_dma_mask() setting;
> 
> This isn't true on some architectures in the 2.4 kernel.  Look at, for
> example, arch/ia64/hp/common/sba_iommu.c in the RedHat 2.4.18-e.31 kernel.
> This is why this particular hack was added.

Thank you for reporting this very serious bug in our kernel; we will fix it
as soon as possible.

> I'm more than happy to change the #ifdefs on the hack to exclude 2.6
> so long as all platforms the driver operates under behave as expected.
> If 2.4 is any guide, however, there may still be some bogus code lurking
> around that uses the "normal" dma mask incorrectly.

Those platforms break the API and should be fixed as opposed to hacks added
to every single driver in drivers/*

Greetings,
    Arjan van de Ven