diff options
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/mqueue.c | 5 | ||||
| -rw-r--r-- | ipc/namespace.c | 13 | ||||
| -rw-r--r-- | ipc/util.h | 2 |
3 files changed, 10 insertions, 10 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index d09aa1c1e3e65..6c5bf7cce7fe3 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -1709,11 +1709,6 @@ void mq_clear_sbinfo(struct ipc_namespace *ns) ns->mq_mnt->mnt_sb->s_fs_info = NULL; } -void mq_put_mnt(struct ipc_namespace *ns) -{ - kern_unmount(ns->mq_mnt); -} - static int __init init_mqueue_fs(void) { int error; diff --git a/ipc/namespace.c b/ipc/namespace.c index a26860a41daca..6ecc30effd3ec 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -145,10 +145,11 @@ void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, static void free_ipc_ns(struct ipc_namespace *ns) { - /* mq_put_mnt() waits for a grace period as kern_unmount() - * uses synchronize_rcu(). + /* + * Caller needs to wait for an RCU grace period to have passed + * after making the mount point inaccessible to new accesses. */ - mq_put_mnt(ns); + mntput(ns->mq_mnt); sem_exit_ns(ns); msg_exit_ns(ns); shm_exit_ns(ns); @@ -169,6 +170,12 @@ static void free_ipc(struct work_struct *unused) struct ipc_namespace *n, *t; llist_for_each_entry_safe(n, t, node, mnt_llist) + mnt_make_shortterm(n->mq_mnt); + + /* Wait for any last users to have gone away. */ + synchronize_rcu(); + + llist_for_each_entry_safe(n, t, node, mnt_llist) free_ipc_ns(n); } diff --git a/ipc/util.h b/ipc/util.h index b2906e3665394..67bdd2aa2c28d 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -56,10 +56,8 @@ struct pid_namespace; #ifdef CONFIG_POSIX_MQUEUE extern void mq_clear_sbinfo(struct ipc_namespace *ns); -extern void mq_put_mnt(struct ipc_namespace *ns); #else static inline void mq_clear_sbinfo(struct ipc_namespace *ns) { } -static inline void mq_put_mnt(struct ipc_namespace *ns) { } #endif #ifdef CONFIG_SYSVIPC |