user_arg2          31 tools/testing/selftests/powerpc/ptrace/ptrace-syscall.c #define user_arg2		gpr[5]
user_arg2          23 tools/testing/selftests/x86/ptrace_syscall.c # define user_arg2		rdx
user_arg2          33 tools/testing/selftests/x86/ptrace_syscall.c # define user_arg2		edx