e0602c35fe3bcbe5fe9179be78882b3101780781 is the first bad commit
commit e0602c35fe3bcbe5fe9179be78882b3101780781
Author: Christian König <christian.koenig@amd.com>
Date:   Wed Nov 19 14:01:21 2014 +0100

    drm/radeon: remove unnecessary VM syncs

    The PD/PTs reservation object now contains everything needed.

    Signed-off-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 417037855b216eafaf9da4088f744a6d6fa033de c91f78cc9bfdb32e20e7e235768f77810ce21416 M	drivers