BIO_RW_DISCARD 180 include/linux/bio.h #define bio_discard(bio) ((bio)->bi_rw & (1 << BIO_RW_DISCARD)) BIO_RW_DISCARD 206 include/linux/blktrace_api.h rw |= (1 << BIO_RW_DISCARD); BIO_RW_DISCARD 90 include/linux/fs.h #define DISCARD_NOBARRIER (1 << BIO_RW_DISCARD) BIO_RW_DISCARD 91 include/linux/fs.h #define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))