If a recursive read-write lock downgrade fails, don't change the depth.
If a recursive read-write lock downgrade fails, don't change the depth.

guiquanz/stronglink,shaunstanislaus/stronglink,feld/stronglink,yamingd/stronglink,iOSCowboy/stronglink,rmoorman/stronglink,nkatsaros/stronglink,yamingd/stronglink,btrask/stronglink,iOSCowboy/stronglink,guiquanz/stronglink,Ryezhang/stronglink,shaunstanislaus/stronglink,feld/stronglink,Ryezhang/stronglink,btrask/stronglink,Ryezhang/stronglink,guiquanz/stronglink,iOSCowboy/stronglink,rmoorman/stronglink,rmoorman/stronglink,feld/stronglink,btrask/stronglink,Lacra17/stronglink,btrask/stronglink,Lacra17/stronglink,Lacra17/stronglink,yamingd/stronglink,nkatsaros/stronglink,shaunstanislaus/stronglink,nkatsaros/stronglink