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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:51 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:51 -0500
commit43ac3f2961b8616da26114ec6dc76ac2a61f76ad (patch)
tree461fc961f6c7d9a724425654523cf61cb6c2e485 /net/sunrpc/clnt.c
parentc42de9dd67250fe984e0e31c9b542d721af6454b (diff)
downloadop-kernel-dev-43ac3f2961b8616da26114ec6dc76ac2a61f76ad.zip
op-kernel-dev-43ac3f2961b8616da26114ec6dc76ac2a61f76ad.tar.gz
SUNRPC: Fix memory barriers for req->rq_received
We need to ensure that all writes to the XDR buffers are done before req->rq_received is visible to other processors. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r--net/sunrpc/clnt.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 9f77530..6e71d6a 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1069,6 +1069,11 @@ call_decode(struct rpc_task *task)
return;
}
+ /*
+ * Ensure that we see all writes made by xprt_complete_rqst()
+ * before it changed req->rq_received.
+ */
+ smp_rmb();
req->rq_rcv_buf.len = req->rq_private_buf.len;
/* Check that the softirq receive buffer is valid */
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