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3993ca9d64
In struct slab we currently have freelist and counters pair, where counters itself is a union of unsigned long with a sub-struct of several smaller fields. Then for the usage with double cmpxchg we have freelist_aba_t that duplicates the definition of the freelist+counters with implicitly the same layout as the full definition in struct slab. Thanks to -fms-extension we can now move the full counters definition to freelist_aba_t (while changing it to struct freelist_counters as a typedef is unnecessary and discouraged) and replace the relevant part in struct slab to an unnamed reference to it. The immediate benefit is the removal of duplication and no longer relying on the same layout implicitly. It also allows further cleanups thanks to having the full definition of counters in struct freelist_counters. Reviewed-by: Harry Yoo <harry.yoo@oracle.com> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> |
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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.