MAJOR              10 include/linux/kdev_t.h #define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))
MAJOR              10 include/uapi/linux/kdev_t.h #define MAJOR(dev)	((dev)>>8)
MAJOR              30 tools/lib/traceevent/plugins/plugin_jbd2.c #define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))