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cd4f430770
If acc_setup() is called when there is already an allocated instance, misc_register() will fail but the error path leaves a dangling pointer to freed memory in the global 'acc_dev' state. Fix this by ensuring that the refcount is zero before we start, and then using a cmpxchg() from NULL to serialise any concurrent initialisers. Bug: 173789633 Signed-off-by: Will Deacon <willdeacon@google.com> Change-Id: I2c26289dcce7dbc493964516c49b05d04aaa6839 Signed-off-by: Giuliano Procida <gprocida@google.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.