Re: [PATCH 3/3] ARM: shmobile: defconfig: Do not enable CONFIG_CPU_BPREDICT_DISABLE

On Mon, Jan 11, 2016 at 07:41:14PM +0100, Geert Uytterhoeven wrote:

Do not disable branch prediction, as this has a big performance impact.

After re-enabling branch prediction, __loop_delay() runs 16 (Cortex A15)
or 11 (Cortex A9) times faster than before.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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This used to be enabled in:

  - ag5evm_defconfig (sh73a0)
  - ape6evm_defconfig (r8a73a4)
  - armadillo800eva_defconfig (r8a7740)
  - koelsch_defconfig (r8a7791)
  - kota2_defconfig (sh73a0)

Was there ever a good reason for that?

If that was a concious decision then I believe it was made before my time.
I'm going ahead and queuing up this change for v4.6.