linux-kernel - Re: [PATCH] gpu: host1x: do not check previously handled gathers

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Message-ID: <CABPQNSarSsWTuYTP0pmBQUiMPcbLG-iPHR-3rS60qSGSVKO0qw@mail.gmail.com>
Date:	Thu, 23 Jan 2014 18:31:22 +0100
From:	Erik Faye-Lund <kusmabite@...il.com>
To:	linux-tegra@...r.kernel.org
Cc:	thierry.reding@...il.com, tbergstrom@...dia.com,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Erik Faye-Lund <kusmabite@...il.com>
Subject: Re: [PATCH] gpu: host1x: do not check previously handled gathers

Ping?

On Tue, Jan 7, 2014 at 9:03 PM, Erik Faye-Lund <kusmabite@...il.com> wrote:
> When patching gathers, we don't need to check against
> gathers with lower indices than the current one, as
> they are guaranteed to already have been handled.
>
> Signed-off-by: Erik Faye-Lund <kusmabite@...il.com>
> ---
>
> Here's a trivial optimization I have been running with for a while.
>
>  drivers/gpu/host1x/job.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
> index de5ec33..e965805 100644
> --- a/drivers/gpu/host1x/job.c
> +++ b/drivers/gpu/host1x/job.c
> @@ -534,7 +534,7 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
>
>                 g->base = job->gather_addr_phys[i];
>
> -               for (j = 0; j < job->num_gathers; j++)
> +               for (j = i + 1; j < job->num_gathers; j++)
>                         if (job->gathers[j].bo == g->bo)
>                                 job->gathers[j].handled = true;
>
> --
> 1.8.1.2
>
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