From: Jeff Layton <jlayton@primarydata.com>
Date: Wed, 10 Sep 2014 13:03:55 +0000 (-0400)
Subject: nfs: fix RCU cl_xprt handling in nfs_swap_activate/deactivate
X-Git-Tag: fixes-for-v3.18-merge-window~10^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dad2b015bb85799f8005da637954f8eafb83f34c;p=pandora-kernel.git

nfs: fix RCU cl_xprt handling in nfs_swap_activate/deactivate

sparse says:

fs/nfs/file.c:543:60: warning: incorrect type in argument 1 (different address spaces)
fs/nfs/file.c:543:60:    expected struct rpc_xprt *xprt
fs/nfs/file.c:543:60:    got struct rpc_xprt [noderef] <asn:4>*cl_xprt
fs/nfs/file.c:548:53: warning: incorrect type in argument 1 (different address spaces)
fs/nfs/file.c:548:53:    expected struct rpc_xprt *xprt
fs/nfs/file.c:548:53:    got struct rpc_xprt [noderef] <asn:4>*cl_xprt

cl_xprt is RCU-managed, so we need to take care to dereference and use
it while holding the RCU read lock.

Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

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