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79a7f41f7f
6ab428604f("cgroup: Implement DEBUG_CGROUP_REF") added a config option which forces cgroup refcnt functions to be not inlined so that they can be kprobed for debugging. However, it forgot export them when the config is enabled breaking modules which make use of css reference counting. Fix it by adding CGROUP_REF_EXPORT() macro to cgroup_refcnt.h which is defined to EXPORT_SYMBOL_GPL when CONFIG_DEBUG_CGROUP_REF is set. Signed-off-by: Tejun Heo <tj@kernel.org> Fixes:6ab428604f("cgroup: Implement DEBUG_CGROUP_REF")
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.