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[ Upstream commit b3e1eb8e7ac9aaa283989496651d99267c4cad6c ] So that when it is unset, ie. '-1', userspace can see it properly. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>