sys_tgkill        550 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_tgkill, sys_tgkill)
sys_tgkill        676 include/linux/syscalls.h asmlinkage long sys_tgkill(pid_t tgid, pid_t pid, int sig);
sys_tgkill        423 include/uapi/asm-generic/unistd.h __SYSCALL(__NR_tgkill, sys_tgkill)
sys_tgkill        423 tools/include/uapi/asm-generic/unistd.h __SYSCALL(__NR_tgkill, sys_tgkill)