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At the moment, accel drivers can be built-in even with CONFIG_DRM=m, but this causes a link failure: x86_64-linux-ld: drivers/accel/ivpu/ivpu_drv.o: in function `ivpu_dev_init': ivpu_drv.c:(.text+0x1535): undefined reference to `drmm_kmalloc' x86_64-linux-ld: ivpu_drv.c:(.text+0x1562): undefined reference to `drmm_kmalloc' x86_64-linux-ld: drivers/accel/ivpu/ivpu_drv.o: in function `ivpu_remove': ivpu_drv.c:(.text+0x1faa): undefined reference to `drm_dev_unregister' x86_64-linux-ld: drivers/accel/ivpu/ivpu_drv.o: in function `ivpu_probe': ivpu_drv.c:(.text+0x1fef): undefined reference to `__devm_drm_dev_alloc' The problem is that DRM_ACCEL is a 'bool' symbol, so driver that only depend on DRM_ACCEL but not also on DRM do not see the restriction to =m configs. To ensure that each accel driver has an implied dependency on CONFIG_DRM, enclose the entire Kconfig file in an if/endif check. Fixes:8bf4889762("drivers/accel: define kconfig and register a new major") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230127221504.2522909-1-arnd@kernel.org (cherry picked from commit3524c96a12) Signed-off-by: Thomas Zimmermann <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.