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d9a96cc18b
Provide inline memcpy and memset functions that can be used instead of the GCC builtins when necessary. The immediate use case is for the text poking functions to avoid the standard memcpy()/memset() calls because objtool complains about such dynamic calls within an AC=1 region. See tools/objtool/Documentation/objtool.txt, warning #9, regarding function calls with UACCESS enabled. Some user copy functions such as copy_user_generic() and __clear_user() have similar rep_{movs,stos} usages. But, those are highly specialized and hard to combine or reuse for other things. Define these new helpers for all other usages that need a completely unoptimized, strictly inline version of memcpy() or memset(). Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Sohil Mehta <sohil.mehta@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://patch.msgid.link/20251118182911.2983253-4-sohil.mehta%40intel.com |
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| .clang-format | ||
| .clippy.toml | ||
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| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
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| README | ||
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.