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a864809894
If the kernel is built without e.g. the imon IR decoder, the protocols sysfs file still show the protocol as available. If user-space tries to enable this decoder, the kernel will report an error: $ echo +imon > /sys/class/rc/rc0/protocols [ 57.693033] rc_core: Loaded IR protocol module ir-imon-decoder, but protocol imon still not available Ensuring that unavailable protocols are not advertised, ensures that users space knows it is not available, and a BPF based IR decoder can be loaded instead. This supports the case when no kernel-based codec needs to be compiled in, and every IR decoder can be BPF based. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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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 Restructured Text 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.