Defined in 2 files as a macro:

• include/linux/ctype.h, line 32 (as a macro)
• tools/perf/util/util.h, line 224 (as a macro)

Referenced in 7 files:

• arch/mips/powertv/powertv_setup.c, line 232
• drivers/target/iscsi/iscsi_target_nego.c, line 732
• drivers/target/tcm_fc/tfc_conf.c, line 95
• include/acpi/platform/acenv.h, line 265
• include/linux/ctype.h, line 40
• tools/perf/util/symbol.c, line 617
• tools/perf/util/util.h, line 202