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))