Extern or forward variable declaration at drivers/md/bcache/bcache.h, line 380 References: drivers/md/bcache/bcache.h, line 380 drivers/md/bcache/bcache.h, line 388 drivers/md/bcache/bcache.h, line 390 drivers/md/bcache/bcache.h, line 515 drivers/md/bcache/bcache.h, line 808 drivers/md/bcache/btree.c, line 2306 drivers/md/bcache/btree.c, line 2363 drivers/md/bcache/btree.c, line 2398 drivers/md/bcache/btree.c, line 2404 drivers/md/bcache/btree.c, line 2411 drivers/md/bcache/btree.c, line 2439 drivers/md/bcache/btree.c, line 2457 drivers/md/bcache/btree.c, line 2478 drivers/md/bcache/debug.c, line 327 drivers/md/bcache/debug.c, line 330 drivers/md/bcache/movinggc.c, line 18 drivers/md/bcache/writeback.c, line 103 drivers/md/bcache/writeback.c, line 128