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Re: [Qemu-ppc] [PATCH v2] cpu: Drop unnecessary dynamic casts in *_env_g
From: |
Richard Henderson |
Subject: |
Re: [Qemu-ppc] [PATCH v2] cpu: Drop unnecessary dynamic casts in *_env_get_cpu() |
Date: |
Fri, 28 Jun 2013 10:32:49 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130612 Thunderbird/17.0.6 |
On 06/28/2013 06:23 AM, Andreas Färber wrote:
> A transition from CPUFooState to FooCPU can be considered safe,
> just like FooCPU::env access in the opposite direction.
> The only benefit of the FOO_CPU() casts would be protection against
> bogus CPUFooState pointers, but then surrounding code would likely
> break, too.
>
> This should slightly improve interrupt etc. performance.
>
> Reported-by: Anthony Liguori <address@hidden>
> Signed-off-by: Andreas Färber <address@hidden>
Acked-by: Richard Henderson <address@hidden>
r~