u-boot of_live_active函数

 

/**
 * of_live_active() - check if livetree is active
 *
 * @returns true if livetree is active, false it not
 */
static inline bool of_live_active(void)
{
	return gd_of_root() != NULL;
}

/* These macros help avoid #ifdefs in the code */
#if CONFIG_IS_ENABLED(OF_LIVE)
#define gd_of_root()		gd->of_root
#define gd_of_root_ptr()	&gd->of_root
#define gd_set_of_root(_root)	gd->of_root = (_root)
#else
#define gd_of_root()		NULL
#define gd_of_root_ptr()	NULL
#define gd_set_of_root(_root)
#endif