drivers/gpu/drm/radeon/Kconfig - kernel/common - Git at Google

 # SPDX-License-Identifier: MIT
 config DRM_RADEON_USERPTR
 	bool "Always enable userptr support"
 	depends on DRM_RADEON
 	select MMU_NOTIFIER
 	help
 	  This option selects CONFIG_MMU_NOTIFIER if it isn't already
 	  selected to enabled full userptr support.
	# SPDX-License-Identifier: MIT
	config DRM_RADEON_USERPTR
	bool "Always enable userptr support"
	depends on DRM_RADEON
	select MMU_NOTIFIER
	help
	This option selects CONFIG_MMU_NOTIFIER if it isn't already
	selected to enabled full userptr support.