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Commit d498b25a authored by Al Viro's avatar Al Viro
Browse files

get rid of useless vfsmount_lock use in put_mnt_ns() 



It hadn't been needed since we'd sanitized the logics in
mark_mounts_for_expiry() (which, in turn, used to be a
rudiment of bad old times when namespace_sem was per-ns).

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 47cd813f

fs/namespace.c

+2 −6
Original line number Diff line number Diff line
@@ -2344,17 +2344,13 @@ void __init mnt_init(void) 


void put_mnt_ns(struct mnt_namespace *ns)

{

	struct vfsmount *root;

	LIST_HEAD(umount_list);



	if (!atomic_dec_and_lock(&ns->count, &vfsmount_lock))

	if (!atomic_dec_and_test(&ns->count))

		return;

	root = ns->root;

	ns->root = NULL;

	spin_unlock(&vfsmount_lock);

	down_write(&namespace_sem);

	spin_lock(&vfsmount_lock);

	umount_tree(root, 0, &umount_list);

	umount_tree(ns->root, 0, &umount_list);

	spin_unlock(&vfsmount_lock);

	up_write(&namespace_sem);

	release_mounts(&umount_list);