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b23eb636d7
s390 is the only architecture in the kernel which makes use of gcc's atomic builtin functions. Even though I don't see any technical problem with that right now, remove this code and open-code compare-and-swap loops again, like every other architecture is doing it also. We can switch to a generic implementation when other architectures are doing that also. See also https://lwn.net/Articles/586838/ for forther details. Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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.