BIO_ISSUE_SIZE_BITS 103 include/linux/blk_types.h #define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS) BIO_ISSUE_SIZE_BITS 106 include/linux/blk_types.h (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT) BIO_ISSUE_SIZE_BITS 134 include/linux/blk_types.h size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1;