diff options
Diffstat (limited to 'fs/nfsd/localio.c')
| -rw-r--r-- | fs/nfsd/localio.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/nfsd/localio.c b/fs/nfsd/localio.c index be710d809a3b..c3eb0557b3e1 100644 --- a/fs/nfsd/localio.c +++ b/fs/nfsd/localio.c @@ -97,11 +97,15 @@ nfsd_open_local_fh(struct net *net, struct auth_domain *dom, } nfsd_file_get(localio); again: + rcu_read_lock(); new = unrcu_pointer(cmpxchg(pnf, NULL, RCU_INITIALIZER(localio))); if (new) { /* Some other thread installed an nfsd_file */ - if (nfsd_file_get(new) == NULL) + if (nfsd_file_get(new) == NULL) { + rcu_read_unlock(); goto again; + } + rcu_read_unlock(); /* * Drop the ref we were going to install (both file and * net) and the one we were going to return (only file). @@ -110,6 +114,8 @@ nfsd_open_local_fh(struct net *net, struct auth_domain *dom, nfsd_net_put(net); nfsd_file_put(localio); localio = new; + } else { + rcu_read_unlock(); } } else nfsd_net_put(net); |