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23d93aa4b3
In order to create the file at build time, modules.builtin.ranges, that contains the range of addresses for all built-in modules, there needs to be a way to identify what code is compiled into modules. To identify what code is compiled into modules during a kernel build, one can look for the presence of the -DKBUILD_MODFILE and -DKBUILD_MODNAME options in the compile command lines. A simple grep in .*.cmd files for those options is sufficient for this. Unfortunately, these options are only passed when compiling C source files. Various modules also include objects built from assembler source, and these options are not passed in that case. Adding $(modfile_flags) to modkern_aflags (similar to modkern_cflags), and adding $(modname_flags) to a_flags (similar to c_flags) makes it possible to identify which objects are compiled into modules for both C and assembler source files. While KBUILD_MODFILE is sufficient to generate the modules ranges data, KBUILD_MODNAME is passed as well for consistency with the C source code case. Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Tested-by: Sam James <sam@gentoo.org> Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Masahiro Yamada <masahiroy@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 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.