linux-kernel - Re: [PATCH v4 17/20] iommu/tegra: gart: Prepend error/debug messages with "GART:"

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Date:   Mon, 24 Sep 2018 12:57:14 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 17/20] iommu/tegra: gart: Prepend error/debug messages
 with "GART:"

On Mon, Sep 24, 2018 at 03:41:50AM +0300, Dmitry Osipenko wrote:
> GART became a part of Memory Controller, hence now the drivers device
> is Memory Controller and not GART. As a result all printed messages are
> prepended with the "tegra-mc 7000f000.memory-controller:", so let's
> prepend GART's messages with "GART:" in order to differentiate them
> from the MC.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/iommu/tegra-gart.c | 36 ++++++++++++++++++------------------
>  1 file changed, 18 insertions(+), 18 deletions(-)

There's a macro called dev_fmt (similar to pr_fmt) to do this for dev_*
printers. Also I think this would be more readable if the prefix was
"gart: " rather than "GART: ". At least from my personal experience I
get easily distracted by all-caps words in logs, because they usually
indicate something that requires immediate attention. I think it's
better to leave that up to higher level mechanisms, such as the color
keying of messages based on level by tools like dmesg.

Thierry

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