we are holding namespace_sem and a reference to root of tree;
iterating through that tree does not need mount_lock. Neither
does the insertion into the rbtree of new namespace or incrementing
the mount count of that namespace.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/namespace.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c
index 2e35f5eb4f81..425c33377770 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3086,14 +3086,12 @@ static struct file *open_detached_copy(struct path *path, bool recursive)
return ERR_CAST(mnt);
}
- lock_mount_hash();
for (p = mnt; p; p = next_mnt(p, mnt)) {
mnt_add_to_ns(ns, p);
ns->nr_mounts++;
}
ns->root = mnt;
mntget(&mnt->mnt);
- unlock_mount_hash();
namespace_unlock();
mntput(path->mnt);
--
2.47.2
