Extern or forward variable declaration at drivers/md/bcache/journal.h, line 167 References: drivers/md/bcache/btree.c, line 1290 drivers/md/bcache/btree.c, line 1297 drivers/md/bcache/btree.c, line 1297 drivers/md/bcache/btree.c, line 1301 drivers/md/bcache/btree.c, line 1395 drivers/md/bcache/btree.c, line 1400 drivers/md/bcache/btree.c, line 1415 drivers/md/bcache/btree.c, line 1418 drivers/md/bcache/btree.c, line 1419 drivers/md/bcache/btree.c, line 1422 drivers/md/bcache/btree.c, line 1423 drivers/md/bcache/btree.c, line 1438 drivers/md/bcache/btree.c, line 1445 drivers/md/bcache/btree.c, line 1447 drivers/md/bcache/btree.c, line 1462 drivers/md/bcache/btree.c, line 1913 drivers/md/bcache/btree.c, line 1955 drivers/md/bcache/btree.c, line 1962 drivers/md/bcache/btree.c, line 2089 drivers/md/bcache/btree.c, line 2150 drivers/md/bcache/btree.c, line 2184 drivers/md/bcache/btree.c, line 2202 drivers/md/bcache/journal.c, line 320 drivers/md/bcache/journal.c, line 320 drivers/md/bcache/journal.c, line 334 drivers/md/bcache/journal.c, line 336 drivers/md/bcache/journal.c, line 340 drivers/md/bcache/journal.c, line 754 drivers/md/bcache/journal.c, line 789 drivers/md/bcache/journal.h, line 167 drivers/md/bcache/journal.h, line 169 drivers/md/bcache/request.c, line 100 drivers/md/bcache/writeback.c, line 138