linux-kernel - Re: [PATCH v2 0/4] Add trace events for SD registers.

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Message-ID: <CAPDyKFqYNMhDKy94zV8Bk80OUiS9JNFf2EmkbhJ0W_N=5=bZJQ@mail.gmail.com>
Date:   Tue, 23 Apr 2019 08:29:15 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Raul E Rangel <rrangel@...omium.org>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        linux-trace-devel@...r.kernel.org,
        Daniel Kurtz <djkurtz@...omium.org>, zwisler@...omium.org,
        Steven Rostedt <rostedt@...dmis.org>,
        hongjiefang <hongjiefang@...micro.com>,
        Jennifer Dahm <jennifer.dahm@...com>,
        Ingo Molnar <mingo@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Kyle Roeschley <kyle.roeschley@...com>,
        Avri Altman <avri.altman@....com>,
        Simon Horman <horms+renesas@...ge.net.au>
Subject: Re: [PATCH v2 0/4] Add trace events for SD registers.

On Tue, 16 Apr 2019 at 20:33, Raul E Rangel <rrangel@...omium.org> wrote:
>
> I am not able to make a single event class for all these registers. They
> all have different struct sizes and different printf formats.
>
> Thanks for the reviews!
>
> Changes in v2:
> - Made trace_sd_scr print out flags.
> - Add BUILD_BUG_ON to make sure tracing stays in sync with structs.
> - memcpy using sizeof(__entry->raw)
>
> Raul E Rangel (4):
>   mmc: core: Add trace event for SD SCR response
>   mmc: core: Add trace event for SD SSR response
>   mmc: core: Add trace event for SD OCR response
>   mmc: core: Add trace event for CSD response
>
>  drivers/mmc/core/mmc.c     |   4 +
>  drivers/mmc/core/sd.c      |  10 ++
>  drivers/mmc/core/sd_ops.c  |   6 ++
>  include/trace/events/mmc.h | 204 +++++++++++++++++++++++++++++++++++++
>  4 files changed, 224 insertions(+)
>
> --
> 2.21.0.392.gf8f6787159e-goog
>

Why do you need this? We already have these card registers reflected
though sysfs files, isn't that sufficient?

Kind regards
Uffe