| commit | 1166fde6a923c30f4351515b6a9a1efc513e7d00 | |
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | |
| Mon, 25 Mar 2013 15:23:40 +0000 (25 11:23 -0400) | ||
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | |
| Mon, 25 Mar 2013 15:23:40 +0000 (25 11:23 -0400) | ||
| tree | c324a24baa26658651d2e1ecbf2771da569ff38b | treesnapshot (tar.gz zip) |
| parent | 240286725d854331422cb15957f8d9bf2741d4e3 | commitdiff |
SUNRPC: Add barriers to ensure read ordering in rpc_wake_up_task_queue_locked
We need to be careful when testing task->tk_waitqueue in
rpc_wake_up_task_queue_locked, because it can be changed while we
are holding the queue->lock.
By adding appropriate memory barriers, we can ensure that it is safe to
test task->tk_waitqueue for equality if the RPC_TASK_QUEUED bit is set.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
We need to be careful when testing task->tk_waitqueue in
rpc_wake_up_task_queue_locked, because it can be changed while we
are holding the queue->lock.
By adding appropriate memory barriers, we can ensure that it is safe to
test task->tk_waitqueue for equality if the RPC_TASK_QUEUED bit is set.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
| net/sunrpc/sched.c | diffblobblamehistory |