On Fri, 2015-10-02 at 17:47 +1000, Michael Ellerman wrote:

On Fri, 2015-25-09 at 04:01:40 UTC, Michael Neuling wrote:

quoted

powerpc has a link register (lr) used for calling functions. We "bl
<func>" to call a function, and "blr" to return back to the call
site.

<snip, geez that was long>

quoted

For the benchmark in
tools/testing/selftests/powerpc/benchmarks/gettimeofday.c
  POWER8:
    64bit gets ~4% improvement
    32bit gets ~9% improvement
  POWER7:
    64bit gets ~7% improvement

Signed-off-by: Michael Neuling <redacted>
Reported-by: Aaron Sawdey <redacted>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/c974809a26a13e40254dbe3c

I'd argue this is a bug fix and should hit stable too..

Cheers,
Ben.