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Linking the CMA framebuffer helpers into a CMA helper library in commit4b2b5e142f("drm: Move GEM memory managers into modules") results in linker errors: arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.o: \ in function `drm_fb_cma_get_gem_obj': \ drivers/gpu/drm/drm_fb_cma_helper.c:46: undefined reference \ to `drm_gem_fb_get_obj' arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.c:46: \ undefined reference to `drm_gem_fb_get_obj' arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.c:46: \ undefined reference to `drm_gem_fb_get_obj' arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.o: in \ function `drm_fb_cma_sync_non_coherent': \ drivers/gpu/drm/drm_fb_cma_helper.c:133: undefined reference \ to `drm_atomic_helper_damage_iter_init' arm-linux-gnueabihf-ld: drivers/gpu/drm/drm_fb_cma_helper.c:135: \ undefined reference to `drm_atomic_helper_damage_iter_next' Link the CMA framebuffer helpers into the KMS helper library to fix the problem. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Fixes:4b2b5e142f("drm: Move GEM memory managers into modules") Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: dri-devel@lists.freedesktop.org Link: https://patchwork.freedesktop.org/patch/msgid/20211026175700.27664-1-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.