Comment 3 for bug 1809879

Ubuntu Trusty kernel does not contain this commit.

Before this patch, Trusty is missing:
 * 16e7549f045d33b0c5b0ebf19d08439e9221d40c

And this 16e7549 seems to be affected by commit 011f5ca18b53bf4c5db545f4b372d3e67a0052a4 in Trusty tree, which is a backport for e02119d5a7b4396c5a872582fddc8bd6d305a70a upstream