Re: [RESEND][PATCH 1/2] lib/scatterlist: Make ARCH_HAS_SG_CHAIN an actual Kconfig

[Thomas Gleixner]

On Sat, 22 Mar 2014, James Bottomley wrote:

> On Sat, 2014-03-22 at 11:13 -0700, Laura Abbott wrote:
> > Rather than have architectures #define ARCH_HAS_SG_CHAIN in an architecture
> > specific scatterlist.h, make it a proper Kconfig option and use that
> > instead. At same time, remove the header files are are now mostly
> > useless and just include asm-generic/scatterlist.h.
> 
> Well, the transformation looks fine.  Perhaps part of the reason for the
> lack of response is that there's no compelling reason in the change log
> above for doing this.  The usual reason for eliminating ARCH_HAS is that
> it's hiding something that would be better expressed a different way
> (that's actually intuitive to grep) or that it's expressing something
> that should be configurable.  Neither of these reasons apply in this
> case, because SG_CHAIN definitely is a property of the architecture not
> the config space and it's not really hiding anything.

Getting rid of pointless copied code is definitely a good enough
reason and the patch removes quite some of that.
 
Thanks,

	tglx
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