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645e954137
Moving the driver-specific mmap code into a GEM object function allows for using DRM helpers for various mmap callbacks. This change also allows to support prime-based mmap via DRM's helper drm_gem_prime_mmap(). Permission checks are implemented by drm_gem_mmap(), with an additional check for radeon_ttm_tt_has_userptr() in the GEM object function. The function radeon_verify_access() is now unused and has thus been removed. As a side effect, radeon_ttm_vm_ops and radeon_ttm_fault() are now implemented in amdgpu's GEM code. v3: * remove unnecessary checks from mmap (Christian) v2: * rename radeon_ttm_vm_ops and radeon_ttm_fault() to radeon_gem_vm_ops and radeon_gem_fault() (Christian) * fix commit description (Alex) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210525151055.8174-4-tzimmermann@suse.de
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.