Did you perform a backport of commit 7b2b160da7661bb2ade3f924b1bd3e3084e53341 ( Upstream commit: b7649158a0d241f8d53d13ff7441858539e16656)?
It seems upstream commit b764915 was cc'd to stable, but was dropped from all but the 3.10 stable tree due to the complexity of the backport.
Did you perform a backport of commit 7b2b160da7661bb 2ade3f924b1bd3e 3084e53341 ( Upstream commit: b7649158a0d241f 8d53d13ff744185 8539e16656) ?
It seems upstream commit b764915 was cc'd to stable, but was dropped from all but the 3.10 stable tree due to the complexity of the backport.