Re: [05/13] powerpc/64s: interrupt replay balance the return branch predictor
From: Michael Ellerman <hidden>
Date: 2017-06-19 12:25:43
On Tue, 2017-06-13 at 13:05:49 UTC, Nicholas Piggin wrote:
The __replay_interrupt code is branched to with bl, but the caller is returned to directly with rfid from the interrupt. Instead, rfid to a stub that returns to the caller with blr, which should keep the return branch predictor balanced. Reviewed-by: Gautham R. Shenoy <redacted> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/b48bbb82e2b83537c500417d60218a cheers