BIO_RW_BARRIER 175 include/linux/bio.h #define bio_barrier(bio) ((bio)->bi_rw & (1 << BIO_RW_BARRIER)) BIO_RW_BARRIER 89 include/linux/fs.h #define WRITE_BARRIER (WRITE | (1 << BIO_RW_BARRIER)) BIO_RW_BARRIER 91 include/linux/fs.h #define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))