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Commit e148582e authored by Trond Myklebust's avatar Trond Myklebust
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NFSv4: Add lockdep checks to nfs4_wait_clnt_recover() 



Attempt to detect deadlocks due to caller holding locks on clp->cl_sem

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent a6a352e9

fs/nfs/nfs4proc.c

+4 −0
Original line number Diff line number Diff line
@@ -2711,11 +2711,15 @@ static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp) 


	might_sleep();



	rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);



	rpc_clnt_sigmask(clnt, &oldset);

	res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,

			nfs4_wait_bit_interruptible,

			TASK_INTERRUPTIBLE);

	rpc_clnt_sigunmask(clnt, &oldset);



	rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);

	return res;

}