Christophe JAILLET d22d91fb1d media: dvb-usb-v2: Constify struct i2c_algorithm
'struct i2c_algorithm' are not modified in these drivers.

Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.

More over, dvb_usb_device_properties->i2c_algo seems to only be copied in
i2c_adapter->algo, which is already a "const struct i2c_algorithm".
This is done in dvb_usbv2_i2c_init()

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  35366	   5832	     36	  41234	   a112	drivers/media/usb/dvb-usb-v2/af9015.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  35430	   5768	     36	  41234	   a112	drivers/media/usb/dvb-usb-v2/af9015.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2025-02-21 10:33:14 +01:00
2024-09-01 20:43:24 -07:00
2022-09-28 09:02:20 +02:00
2025-02-02 15:39:26 -08:00
2024-03-18 03:36:32 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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