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caabdd0f59
gcc warns a few thousand times about the isdigit() shadow: include/linux/ctype.h:26:19: warning: declaration of 'isdigit' shadows a built-in function [-Wshadow] As there is already a compiler builtin, just use that, and make it clear we do that by defining a macro. Unfortunately, clang does not have the isdigit() builtin, so this has to be conditional. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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.