sys_tkill         490 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_tkill, sys_tkill)
sys_tkill         675 include/linux/syscalls.h asmlinkage long sys_tkill(pid_t pid, int sig);
sys_tkill         421 include/uapi/asm-generic/unistd.h __SYSCALL(__NR_tkill, sys_tkill)
sys_tkill         421 tools/include/uapi/asm-generic/unistd.h __SYSCALL(__NR_tkill, sys_tkill)