linux-kernel - Re: [PATCH] arm: multi_v7_defconfig: Enable more OMAP related configs

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Message-Id: <133a5da2-d161-411c-9cc9-0bad46ab981d@app.fastmail.com>
Date: Wed, 06 Aug 2025 17:41:33 +0200
From: "Arnd Bergmann" <arnd@...db.de>
To: "Beleswar Padhi" <b-padhi@...com>, "Russell King" <linux@...linux.org.uk>
Cc: "Krzysztof Kozlowski" <krzk@...nel.org>, "Andrew Davis" <afd@...com>,
 "Udit Kumar" <u-kumar1@...com>, "Praneeth Bajjuri" <praneeth@...com>,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm: multi_v7_defconfig: Enable more OMAP related configs

On Wed, Aug 6, 2025, at 16:18, Beleswar Padhi wrote:
> From: Sinthu Raja <sinthu.raja@...com>
>
> This allows us to enable various peripherals in the TI OMAP family
> platforms like AM571X-IDK, AM572X-IDK, AM574X-IDK, AM57XX-BEAGLE-X15,
> AM57XX-EVM using the multi_v7_defconfig, instead of only with the
> OMAP specific defconfigs.

Hi Beleswar,

It's fine to enable drivers that are only used on a specific
platform, but those should generally be loadable modules, not
built-in.

For the generic (platform-independent) options, I would
suggest splitting them out into a separate patch, so you
can describe better what the purpose is, since this is
clearly not just for OMAP.

> IKCONFIG*:
> Allows reading the current kernel configuration through /proc/config.gz

This one seems particularly unnecessary in a "defconfig" build
since the configuration is already known based on the version.

> THERMAL_EMULATION:
> Adds emul_temp sysfs node under thermal zones to allow emulating
> temperature changes.

The documentation for this option suggests that we probably
don't want it enabled.

> FANOTIFY:
> Allows sending open file descriptors to userspace listeners along with
> file access events.
>
> USER_NS:
> NAMESPACES:
> Enable user NS to provide user info of different users for different
> process.
>
> POSIX_MQUEUE:
> Supports POSIX message queues for priority-based IPC.
>
> BSD_PROCESS_ACCT:
> Enables BSD process accounting to allow user space program to write
> process accounting information to a file.

I assume these are all in order to run a particular userspace
distro?

      Arnd