Re: Modpost warning on Alchemy

[Ralf Baechle <ralf@linux-mips.org>]

On Thu, Aug 02, 2007 at 10:39:21AM +0100, Maciej W. Rozycki wrote:

> > >    No, I don't.  But that was why the original code preferred the wired
> > > entry approach over ioremap() -- not to map a whole range...
> > 
> >    Not the only one: dynamic ioremap() seems to be impossible in interrupt
> > context.
> 
>  Well, ioremap() may sleep indeed.  How about using a softirq then?  
> Broken hardware (=one that requires PCI configuration accesses from the 
> IRQ context) is not an excuse to extend the breakage over to software.

Lockdep would trigger on ioremap from an interrupt almost immediately.
But I guess not a whole lot of people are using it, probably because they
think they're safe from locking problems on uniprocessors ...

  Ralf