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-rw-r--r--fs/namespace.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index a0d0ef1..9d17541 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -869,7 +869,7 @@ void mark_mounts_for_expiry(struct list_head *mounts)
/* don't do anything if the namespace is dead - all the
* vfsmounts from it are going away anyway */
namespace = mnt->mnt_namespace;
- if (!namespace || atomic_read(&namespace->count) <= 0)
+ if (!namespace || !namespace->root)
continue;
get_namespace(namespace);
@@ -1450,9 +1450,12 @@ void __init mnt_init(unsigned long mempages)
void __put_namespace(struct namespace *namespace)
{
+ struct vfsmount *root = namespace->root;
+ namespace->root = NULL;
+ spin_unlock(&vfsmount_lock);
down_write(&namespace->sem);
spin_lock(&vfsmount_lock);
- umount_tree(namespace->root);
+ umount_tree(root);
spin_unlock(&vfsmount_lock);
up_write(&namespace->sem);
kfree(namespace);
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