linux-kernel - [PATCH v2 0/2] libfs: Introduce tokenize_user

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Date:   Thu, 25 Aug 2022 18:48:31 +0200
From:   Cezary Rojewski <cezary.rojewski@...el.com>
To:     alsa-devel@...a-project.org, broonie@...nel.org
Cc:     tiwai@...e.com, perex@...ex.cz,
        amadeuszx.slawinski@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, hdegoede@...hat.com,
        lgirdwood@...il.com, kai.vehmanen@...ux.intel.com,
        peter.ujfalusi@...ux.intel.com, ranjani.sridharan@...ux.intel.com,
        yung-chuan.liao@...ux.intel.com, viro@...iv.linux.org.uk,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        andy.shevchenko@...il.com,
        Cezary Rojewski <cezary.rojewski@...el.com>
Subject: [PATCH v2 0/2] libfs: Introduce tokenize_user_input()

Continuation of recent upstream discussion [1] regarding user string
tokenization.

First, tokenize_user_input() is introduced to allow for splitting
specified user string into a sequence of integers. Makes use of
get_options() internally so the parsing logic is not duplicated.

With that done, redundant parts of the sound driver are removed.

Originally similar functionality was added for the SOF sound driver. As
more users are on the horizon, it is desirable to update existing fs
code and provide a unified solution.


Changes in v2:
- reused get_options() so no parsing logic is duplicated
- simplified __user variant with help of memdup_user_nul()
  Both suggested by Andy, thanks for thourough review


[1]: https://lore.kernel.org/alsa-devel/20220707091301.1282291-1-cezary.rojewski@intel.com/


Cezary Rojewski (2):
  libfs: Introduce tokenize_user_input()
  ASoC: SOF: Remove strsplit_u32() and tokenize_input()

 fs/libfs.c                        | 45 +++++++++++++++
 include/linux/fs.h                |  1 +
 sound/soc/sof/sof-client-probes.c | 92 ++++---------------------------
 3 files changed, 57 insertions(+), 81 deletions(-)

-- 
2.25.1