21dcd70ed4
There were two doorbells, one embedded in another, which are very confusing.
Change the member variable name to mapping to differentiate them. Also,
rename doorbells_mutex to just mutext for brevity.
Change-Id: Iaa14a1a3ee09449a9089fc1fb39c916fdf32fb44
Signed-off-by: Yong Zhao <yong.zhao@amd.com>
[ROCm/ROCR-Runtime commit: 5972fac417]