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 for <linuxppc-dev@lists.ozlabs.org>; Mon, 19 Jun 2017 22:25:43 +1000 (AEST)
In-Reply-To: <20170613130557.26315-6-npiggin@gmail.com>
To: Nicholas Piggin <npiggin@gmail.com>, linuxppc-dev@lists.ozlabs.org
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: "Gautham R . Shenoy" <ego@linux.vnet.ibm.com>,
 Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [05/13] powerpc/64s: interrupt replay balance the return branch
 predictor
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Date: Mon, 19 Jun 2017 22:25:43 +1000 (AEST)
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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 <ego@linux.vnet.ibm.com>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/b48bbb82e2b83537c500417d60218a

cheers