BIO_ISSUE_SIZE_SHIFT 104 include/linux/blk_types.h #define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1) BIO_ISSUE_SIZE_SHIFT 106 include/linux/blk_types.h (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT) BIO_ISSUE_SIZE_SHIFT 128 include/linux/blk_types.h return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT); BIO_ISSUE_SIZE_SHIFT 137 include/linux/blk_types.h ((u64)size << BIO_ISSUE_SIZE_SHIFT));