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Moving the driver-specific mmap code into a GEM object function allows for using DRM helpers for various mmap callbacks. The respective rockchip functions are being removed. The file_operations structure fops is now being created by the helper macro DEFINE_DRM_GEM_FOPS(). Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> [On rk3288 (pinky), rk3399 (gru-kevin, puma) and rk3328 (rock64)] Tested-by: Heiko Stuebner <heiko@sntech.de> [On RK3188/RK3066 (without iommu)] Tested-by: Alex Bee <knaerzche@gmail.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Link: https://patchwork.freedesktop.org/patch/msgid/20210624095502.8945-1-tzimmermann@suse.de