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a7b9ffd8c2
In a future patch, the port I/O functions (`inb()`, `outb()`, and friends will only be declared in the `HAS_IOPORT` configuration option is enabled. The ni_labpc_common module is used by the ni_labpc module (for ISA cards), the ni_labpc_cs module (for PCMCIA cards), and the ni_labpc_pci module (for PCI cards). The ISA and PCMCIA cards use port I/O and the PCI cards use memory-mapped I/O. Conditionally compile the parts of the module that use the port I/O functions so they are compiled if and only if the `CONFIG_HAS_IOPORT` macro is defined, so that the module can be built if the port I/O functions have not been declared. Add a run-time check in the `labpc_common_attach()` to return an error if the comedi device wants to use port I/O when the `CONFIG_HAS_IOPORT` macro is undefined. The changes allow the module to be built even if the port I/O functions have not been declared. Cc: Arnd Bergmann <arnd@kernel.org> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Link: https://lore.kernel.org/r/20230913170712.111719-9-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.