MAP_ERR_SHIFT     130 drivers/nvdimm/btt.c 		mapping |= (1 << MAP_ERR_SHIFT);
MAP_ERR_SHIFT      19 drivers/nvdimm/btt.h #define MAP_ERR_MASK (1 << MAP_ERR_SHIFT)
MAP_ERR_SHIFT      20 drivers/nvdimm/btt.h #define MAP_LBA_MASK (~((1 << MAP_TRIM_SHIFT) | (1 << MAP_ERR_SHIFT)))