On Tue, 11 Feb 2014, Paul Gortmaker wrote:

> > > Fixes:
> > > 
> > > arch/x86/boot/compressed/../string.c:60:14: warning: symbol 'atou' was 
> > > not declared. Should it be static?
> > > arch/x86/boot/string.c:133:6: warning: symbol 'strstr' was not declared. 
> > > Should it be static?
> > > 
> > > The atou one could be considered a false positive; it seems somehow
> > > caused by including ./string.c from within /compressed/string.c file.
> > > However git grep shows only the atou prototype and declaration, so
> > > it is completely unused and we can hence delete it.
> > > 
> > 
> > Declaring a prototype in a header file would be pointless if there is no 
> > current breakage; I don't see why you can't remove strstr() in 
> > arch/x86/boot/string.c entirely.  What breaks?
> 
> Explicit breakage vs. sparse warnings are two different things.  It may
> be that we can delete strstr() just like I did for atou() -- but in the
> interest of doing the minimal change, I did just what was needed for
> fixing the sparse warnings for strstr.  I can test if it can be removed,
> but it has the smell of generic-libc usage all over it...
> 

When the minimal change is to add an unnecessary prototype for a function 
that is not referenced, it doesn't seem acceptable.
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