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c33196c942
In functions such as [__]slab_update_freelist() and __slab_update_freelist_fast/slow() we pass old and new freelist and counters as 4 separate parameters. The underlying __update_freelist_fast() then constructs struct freelist_counters variables for passing the full freelist+counter combinations to cmpxchg double. In most cases we actually start with struct freelist_counters variables, but then pass the individual fields, only to construct new struct freelist_counters variables. While it's all inlined and thus should be efficient, we can simplify this code. Thus replace the 4 parameters for individual fields with two pointers to struct freelist_counters wherever applicable. __update_freelist_fast() can then pass them directly to try_cmpxchg_freelist(). The code is also more obvious as the pattern becomes unified such that we set up "old" and "new" struct freelist_counters variables upfront as we fully need them to be, and simply call [__]slab_update_freelist() on them. Previously some of the "new" values would be hidden among the many parameters and thus make it harder to figure out what the code does. 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.