Re: [PATCH 02/10] Driver core: Add iommu_ops to bus_type

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On Tue, Sep 13, 2011 at 05:38:11PM +0200, Roedel, Joerg wrote:
> On Tue, Sep 13, 2011 at 10:58:55AM -0400, Greg KH wrote:
> > On Tue, Sep 13, 2011 at 04:54:02PM +0200, Roedel, Joerg wrote:
> > > --- a/include/linux/device.h
> > > +++ b/include/linux/device.h
> > > @@ -22,6 +22,7 @@
> > >  #include <linux/types.h>
> > >  #include <linux/module.h>
> > >  #include <linux/pm.h>
> > > +#include <linux/iommu.h>
> > 
> > Ick, please don't add new #includes to device.h, it makes the whole
> > build slower.  Just pre-declare the structure and all should be fine.
> 
> Hmm, since linux/iommu.h provides 'struct iommu_ops', and this patch
> adds a 'struct iommu_ops' to 'struct bus_type', wouldn't a simple
> forward declaration make the bus_type incomplete in most other places?

No, just like it doesn't make iommu.h incomplete as you used a struct
bus_type there.

> To lower the impact I can move the 'struct iommu_ops' to a seperate
> header file instead.

No, that should not be necessary.

greg k-h
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