NFS: Avoid RCU usage in tracepoints
authorAnna Schumaker <Anna.Schumaker@Netapp.com>
Wed, 1 Nov 2017 19:48:43 +0000 (15:48 -0400)
committerAnna Schumaker <Anna.Schumaker@Netapp.com>
Fri, 17 Nov 2017 21:43:43 +0000 (16:43 -0500)
commit3944369db701f075092357b511fd9f5755771585
treec1b5b6e3cd91ecefe8fc8de808237ef5edf5f328
parent62b56a675565a2e40f2cdf50455977448fd87413
NFS: Avoid RCU usage in tracepoints

There isn't an obvious way to acquire and release the RCU lock during a
tracepoint, so we can't use the rpc_peeraddr2str() function here.
Instead, rely on the client's cl_hostname, which should have similar
enough information without needing an rcu_dereference().

Reported-by: Dave Jones <davej@codemonkey.org.uk>
Cc: stable@vger.kernel.org # v3.12
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
fs/nfs/nfs4trace.h