powerpc/vdso: Emit GNU & SysV hashes

[Michael Ellerman]

On Fri, 2015-07-08 at 03:05:42 UTC, Michael Ellerman wrote:
> Andy Lutomirski says:
> 
>   Some dynamic loaders may be slightly faster if a GNU hash is
>   available.
> 
>   This is unlikely to have any measurable effect on the time it takes
>   to resolve vdso symbols (since there are so few of them).  In some
>   contexts, it can be a win for a different reason: if every DSO has a
>   GNU hash section, then libc can avoid calculating SysV hashes at
>   all. Both musl and glibc appear to have this optimization.
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/787b393c9f6300c343600d39

cheers