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When the last reference to a TTM BO is dropped, ttm_bo_release() will acquire the DMA reservation object's wound/wait mutex while trying to clean up (ttm_bo_cleanup_refs_or_queue() via ttm_bo_release()). It is therefore essential that drm_gem_object_release() be called after the TTM BO has been uninitialized, otherwise drm_gem_object_release() has already destroyed the wound/wait mutex (via dma_resv_fini()). Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.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.