From: Frank Filz <ffilzlnx@us.ibm.com>
Subject: [patch 0/4] correct kernel locking for RPC rpc_release
	callbacks
Date: Tue, 17 Oct 2006 10:24:30 -0700
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To: NFS List <nfs@lists.sourceforge.net>
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The following set of patches corrects use of the big kernel lock in
protecting RPC calls and associated call backs.

A problem was noted where nfs_async_unlink_release() was called without
the BKL being held as expected. Chuck Lever and Trond Myklebust noted
that the rpc_release() callback is a recent addition and other callbacks
might also expect the BKL to be held.

With the addition of lock_kernel()/unlock_kernel() around all calls to
the rpc_release() callbacks, there is no need for NFS code to hold the
BKL when making calls to rpc_execute(), rpc_call_sync(), and
rpc_call_async().

Frank Filz


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