Extern or forward variable declaration at include/linux/libata.h, line 1016 References: drivers/ata/libata-core.c, line 6752 drivers/ata/libata-core.c, line 6835 drivers/ata/pata_cmd64x.c, line 479 drivers/ata/pata_cmd64x.c, line 484 drivers/ata/pata_cs5520.c, line 144 drivers/ata/pata_cs5535.c, line 186 drivers/ata/pata_cs5536.c, line 275 drivers/ata/pata_cypress.c, line 132 drivers/ata/pata_it8213.c, line 268 drivers/ata/pata_marvell.c, line 147 drivers/ata/pata_piccolo.c, line 95 drivers/ata/pata_serverworks.c, line 442 drivers/ata/pata_via.c, line 603 include/linux/libata.h, line 1016