Defined in 2 files as a macro:

• include/linux/ctype.h, line 31 (as a macro)
• tools/include/linux/ctype.h, line 31 (as a macro)

Defined in 1 files as a function:

• tools/include/nolibc/ctype.h, line 94 (as a function)

Referenced in 2 files:

• kernel/bpf/helpers.c
  • line 892
  • line 957
• net/ceph/ceph_common.c, line 203