IDE0_MAJOR 1187 drivers/ide/ide-probe.c { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, IDE0_MAJOR 15 include/linux/root_dev.h Root_HDA1 = MKDEV(IDE0_MAJOR, 1), IDE0_MAJOR 16 include/linux/root_dev.h Root_HDA2 = MKDEV(IDE0_MAJOR, 2), IDE0_MAJOR 16 include/uapi/linux/major.h #define HD_MAJOR IDE0_MAJOR