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authorTrond Myklebust <trond.myklebust@primarydata.com>2014-09-02 13:58:58 -0400
committerJ. Bruce Fields <bfields@redhat.com>2014-09-02 17:53:30 -0400
commit66f09ca717e7905e0eebe000b86e27d0274b95ac (patch)
treeec63e3a95616c279d9b5ae6014daf198f0a93603 /fs/nfs/callback.c
parentd4e89902990e3fae1b8d2ca501d2fa5f0657c053 (diff)
downloadlinux-66f09ca717e7905e0eebe000b86e27d0274b95ac.tar.bz2
nfs: do not start the callback thread until we set rqstp->rq_task
This fixes an Oopsable race when starting up the callback server. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfs/callback.c')
-rw-r--r--fs/nfs/callback.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index e3dd1cd175d9..b8fb3a4ef649 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -235,7 +235,7 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
cb_info->serv = serv;
cb_info->rqst = rqstp;
- cb_info->task = kthread_run(callback_svc, cb_info->rqst,
+ cb_info->task = kthread_create(callback_svc, cb_info->rqst,
"nfsv4.%u-svc", minorversion);
if (IS_ERR(cb_info->task)) {
ret = PTR_ERR(cb_info->task);
@@ -245,6 +245,7 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
return ret;
}
rqstp->rq_task = cb_info->task;
+ wake_up_process(cb_info->task);
dprintk("nfs_callback_up: service started\n");
return 0;
}