drm_fb_helper_sys_read 733 drivers/gpu/drm/drm_fb_helper.c ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, drm_fb_helper_sys_read 381 include/drm/drm_fb_helper.h static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,