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We don't populate drm_driver.gem_prime_import_sg_table so only DMA-BUFs exported from our own device can be imported. We don't populate drm_gem_object_funcs.get_sg_table so DMA-BUFs cannot be imported into another device. Still, this is useful to user-space to share buffers between processes and between API boundaries (e.g. wlroots hard-requires PRIME import/export support). v2: expand commit message Signed-off-by: Simon Ser <contact@emersion.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Tian Tao <tiantao6@hisilicon.com> Cc: Maxime Ripard <maxime@cerno.tech> Cc: Hans de Goede <hdegoede@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230302143502.500661-2-contact@emersion.fr
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.