Re: linux-next: build warnings after merge of the kbuild tree

On Wed, 17 Aug 2016 14:59:59 +0200
Michal Marek [off-list ref] wrote:

On 2016-08-17 03:44, Stephen Rothwell wrote:

quoted

Hi Michal,

After merging the kbuild tree, today's linux-next build (powerpc
ppc64_defconfig) produced these warnings:

WARNING: 25 bad relocations
c000000000cf2570 R_PPC64_ADDR64    __crc___arch_hweight16  

[...]

quoted

Introduced by commit

  9445aa1a3062 ("ppc: move exports to definitions")

I have reverted that commit for today.

[cc-ing the ppc guys for clues - also involved is commit

  22823ab419d8 ("EXPORT_SYMBOL() for asm")
]  

FWIW, I see these warnings as well. Any help from ppc developers is
appreciated - should the R_PPC64_ADDR64 be whitelisted for exported asm
symbols (their CRCs actually)?

The dangling relocation is a side effect of linker unable to resolve the
reference to the undefined weak symbols. So the real question is, why has
genksyms not overridden these symbols with their CRC values?

This may not even be powerpc specific, but  I'll poke at it a bit more
when I get a chance.

Thanks,
Nick