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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-23 13:26:10 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-23 15:24:59 -0400
commit54ac471c83aff6b1e068eb8029c797dc68a76e89 (patch)
tree3311a74fc6f5cdbedbe4e1da9bbbbaf6671050a2 /fs/nfs/idmap.c
parent4697bd5e9419348ef9fa9b55cefe4355ad9d3d01 (diff)
downloadop-kernel-dev-54ac471c83aff6b1e068eb8029c797dc68a76e89.zip
op-kernel-dev-54ac471c83aff6b1e068eb8029c797dc68a76e89.tar.gz
NFS: Add memory barriers to the nfs_client->cl_cons_state initialisation
Ensure that a process that uses the nfs_client->cl_cons_state test for whether the initialisation process is finished does not read stale data. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/idmap.c')
-rw-r--r--fs/nfs/idmap.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 861be75..b5b86a0 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -548,6 +548,7 @@ restart:
/* Skip nfs_clients that failed to initialise */
if (clp->cl_cons_state < 0)
continue;
+ smp_rmb();
if (clp->rpc_ops != &nfs_v4_clientops)
continue;
cl_dentry = clp->cl_idmap->idmap_pipe->dentry;
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