Re: Can't turn off SSB (CONFIG_SSB)?

["John W. Linville" <linville@tuxdriver.com>]

On Mon, Dec 21, 2009 at 10:51:16AM -0800, Philip A. Prindeville wrote:
> On 12/21/2009 12:24 AM, Holger Schurig wrote:
> >> And what are the steps to figuring out the dependency that
> >> keeps forcing it on?  Something must be doing a "select SSB"
> >> but I'm not sure what.  
> > 
> > "make xconfig", and then turn on "Options -> Show Debug Info".
> > 
> > Then you see the reverse dep.
> > 
> > 
> > Another thing would be "find -name Kconfig |xargs grep 
> > SSB_POSSIBLE" and then carefully check those files.
> 
> Well, as I mentioned, arch/x86/configs/i386_defconfig contains:
> 
> CONFIG_SSB_POSSIBLE=y
> 
> which I've not been able to understand why.  There are lots of x86 configurations where this might *not* be possible, in embedded platforms in particular.

config SSB_POSSIBLE
        bool
        depends on HAS_IOMEM && HAS_DMA
        default y

What x86 configurations don't have IOMEM or DMA?  And what difference
does it make if SSB_POSSIBLE is defined if it doesn't build any code?

John
-- 
John W. Linville		Someday the world will need a hero, and you
linville@tuxdriver.com			might be all we have.  Be ready.