const golang.org/x/sys/unix._C__NSIG

3 uses

	golang.org/x/sys/unix (current package)
		syscall_linux.go#L1946: 	return signalfd(fd, sigmask, _C__NSIG/8, flags)
		syscall_linux.go#L2394: 	return rtSigprocmask(how, set, oldset, _C__NSIG/8)
		ztypes_linux_amd64.go#L270: const _C__NSIG = 0x41