lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

SUNRPC: Fix memory barriers for req->rq_received

Browse Source 
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>
This commit is contained in:
Trond Myklebust
2006-03-20 13:44:51 -05:00
parent c42de9dd67
commit 43ac3f2961
2 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
net/sunrpc/xprt.c
View File

@@ -651,6 +651,8 @@ void xprt_complete_rqst(struct rpc_task *task, int copied)
task->tk_rtt = (long)jiffies - req->rq_xtime;
list_del_init(&req->rq_list);
/* Ensure all writes are done before we update req->rq_received */
smp_wmb();
req->rq_received = req->rq_private_buf.len = copied;
rpc_wake_up_task(task);
}
@@ -727,7 +729,6 @@ void xprt_transmit(struct rpc_task *task)
dprintk("RPC: %4d xprt_transmit(%u)\n", task->tk_pid, req->rq_slen);
smp_rmb();
if (!req->rq_received) {
if (list_empty(&req->rq_list)) {
spin_lock_bh(&xprt->transport_lock);