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

2 uses

	golang.org/x/sys/unix (current package)
		zsyscall_linux_amd64.go#L305: 	r0, _, e1 := Syscall6(SYS_SENDFILE, uintptr(outfd), uintptr(infd), uintptr(unsafe.Pointer(offset)), uintptr(count), 0, 0)
		zsysnum_linux_amd64.go#L50: 	SYS_SENDFILE                = 40