[RFC] remove dead code from link_elf.c

[Konstantin Belousov]

On Thu, May 15, 2014 at 03:36:51PM +0200, Oliver Pinter wrote:
> Hi all!
> 
> I found that the SPARSE_MAPPING used only in sys/kern/link_elf.c file,
> and no other place in kernel, nor in generated codes in /usr/obj/...
> 
> op at pandora-d opBSD.git> git grep -i SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> sys/kern/link_elf.c:#ifdef SPARSE_MAPPING
> 
> I proposed to remove the old/dead codes. Patch attached. Tested on amd64.

I agree that SPARSE_MAPPING could go away.  But your testing is void,
since link_elf.c is practically not used on amd64, which utilizes object
file format for klds.
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