Defined in 2 files as a macro:

• include/linux/ctype.h, line 32 (as a macro)
• tools/perf/util/util.h, line 236 (as a macro)

Referenced in 6 files:

• drivers/target/iscsi/iscsi_target_nego.c, line 963
• drivers/target/tcm_fc/tfc_conf.c, line 95
• include/acpi/platform/acenv.h, line 339
• include/linux/ctype.h, line 40
• tools/lib/symbol/kallsyms.h, line 17
• tools/perf/util/util.h, line 208