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[ Upstream commit2ef0785b30] The empty stub functions are defined as global functions, which causes a warning because of missing prototypes: drivers/gpu/drm/exynos/exynos_drm_g2d.h:37:5: error: no previous prototype for 'g2d_open' drivers/gpu/drm/exynos/exynos_drm_g2d.h:42:5: error: no previous prototype for 'g2d_close' Mark them as 'static inline' to avoid the warning and to make them behave as intended. Fixes:eb4d9796fa("drm/exynos: g2d: Convert to driver component API") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Sasha Levin <sashal@kernel.org>