linux-kernel - Re: drm/i915/gvt: Use common error handling code in shadow_workload_ring

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Date:   Tue, 24 Oct 2017 16:51:54 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Joe Perches <joe@...ches.com>, dri-devel@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org,
        intel-gvt-dev@...ts.freedesktop.org
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Garry Hurley <garry.hurley.jr@...il.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Zhi Wang <zhi.a.wang@...el.com>,
        kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: drm/i915/gvt: Use common error handling code in
 shadow_workload_ring_buffer()

>> …  It's just that two out of three error
>> messages happened to be the same and Markus wants to save a bit of
>> memory by using the same string.  The memory savings is not so big that
>> it's worth making the code less readable.
> 
> I agree with Dan.
> 
> It doesn't save any real memory either as the compiler/linker
> reuses the repeated string.

It might depend on passing appropriate parameters.


> It might, depending on the compiler, save a few bytes of
> object code as the compiler may not optimize the repeated
> call away though.

I am trying to show corresponding change possibilities.


> But a good compiler could do that too.

Do you prefer to delegate the proposed software refactoring
only to a corresponding optimiser?

Regards,
Markus