CACHE_DISCARD 2278 drivers/md/bcache/super.c ca->discard = CACHE_DISCARD(&ca->sb); CACHE_DISCARD 1111 drivers/md/bcache/sysfs.c if (v != CACHE_DISCARD(&ca->sb)) { CACHE_DISCARD 217 include/uapi/linux/bcache.h BITMASK(CACHE_DISCARD, struct cache_sb, flags, 1, 1);