linux-kernel - Re: [PATCH v1] regmap: introduce value tracing for regmap bulk operations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 24 Aug 2022 00:39:26 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Dmitry Rokosov <DDRokosov@...rdevices.ru>
Cc:     "broonie@...nel.org" <broonie@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "rafael@...nel.org" <rafael@...nel.org>,
        "jic23@...nel.org" <jic23@...nel.org>,
        kernel <kernel@...rdevices.ru>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] regmap: introduce value tracing for regmap bulk operations

On Tue, Aug 16, 2022 at 9:14 PM Dmitry Rokosov <DDRokosov@...rdevices.ru> wrote:
>
> Currently, only one-register io operations support tracepoints with
> value logging. For the regmap bulk operations developer can view
> hw_start/hw_done tracepoints with starting reg number and registers
> count to be reading or writing. This patch injects tracepoints with
> dumping registers values in the hex format to regmap bulk reading
> and writing.

Since it's applied, below might be considered for follow-ups.

...

> +               if (val)
> +                       memcpy(__get_dynamic_array(buf), val, val_len);

I'm probably missing something, but what this condition prevents from?

...

> +       TP_printk("%s reg=%x val=%s", __get_str(name),
> +                 (unsigned int)__entry->reg,

Why do you need casting?

-- 
With Best Regards,
Andy Shevchenko