Variable tools/perf/util/ctype.c, line 42 [usage...] Extern or forward variable declaration tools/perf/util/sane_ctype.h, line 7 [usage...] Local variable drivers/block/rbd.c, line 5054 [usage...] drivers/crypto/sunxi-ss/sun4i-ss-cipher.c, line 30 [usage...] drivers/crypto/sunxi-ss/sun4i-ss-cipher.c, line 142 [usage...] drivers/crypto/sunxi-ss/sun4i-ss-hash.c, line 182 [usage...] drivers/s390/char/sclp_rw.c, line 179 [usage...] drivers/tty/n_tty.c, line 418 [usage...] kernel/stacktrace.c, line 14 [usage...] kernel/stacktrace.c, line 26 [usage...] kernel/trace/trace_events_hist.c, line 4697 [usage...] kernel/trace/trace_functions_graph.c, line 564 [usage...] kernel/trace/trace_functions_graph.c, line 1313 [usage...] lib/vsprintf.c, line 547 [usage...] lib/vsprintf.c, line 576 [usage...] mm/swap_state.c, line 75 [usage...] mm/swap_state.c, line 622 [usage...] mm/swap_state.c, line 645 [usage...] tools/include/linux/stacktrace.h, line 13 [usage...] tools/lib/traceevent/event-parse.c, line 5549 [usage...] Class, struct, or union member include/uapi/linux/btrfs.h, line 591 [usage...]