b69830b3d3
Resolves the follwing build error: drivers/dahdi/dahdi_dynamic_eth.c: In function ‘ztdeth_exit’: drivers/dahdi/dahdi_dynamic_eth.c:448: error: implicit declaration of function ‘cancel_work_sync’ RHEL kernel versions 2.6.18-238 (5.6) and greater had cancel_work_sync() backported which is what I did my original smoke test on. Reported-by: Oron Peled <oron.peled@xorcom.com> Signed-off-by: Shaun Ruffell <sruffell@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10588 a0bf4364-ded3-4de4-8d8a-66a801d63aff