XArray tests: Add missing locking

Lockdep caught me being sloppy in the test suite and failing to lock
the XArray appropriately.

Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Matthew Wilcox <willy@infradead.org>

diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index 5f9c14e..0598e86 100644 (file)
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -208,15 +208,19 @@ static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index)
                        XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_2));
 
                        /* We should see two elements in the array */
+                       rcu_read_lock();
                        xas_for_each(&xas, entry, ULONG_MAX)
                                seen++;
+                       rcu_read_unlock();
                        XA_BUG_ON(xa, seen != 2);
 
                        /* One of which is marked */
                        xas_set(&xas, 0);
                        seen = 0;
+                       rcu_read_lock();
                        xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0)
                                seen++;
+                       rcu_read_unlock();
                        XA_BUG_ON(xa, seen != 1);
                }
                XA_BUG_ON(xa, xa_get_mark(xa, next, XA_MARK_0));
@@ -442,7 +446,9 @@ static noinline void check_multi_store_1(struct xarray *xa, unsigned long index,
        XA_BUG_ON(xa, xa_load(xa, max) != NULL);
        XA_BUG_ON(xa, xa_load(xa, min - 1) != NULL);
 
+       xas_lock(&xas);
        XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(min)) != xa_mk_value(index));
+       xas_unlock(&xas);
        XA_BUG_ON(xa, xa_load(xa, min) != xa_mk_value(min));
        XA_BUG_ON(xa, xa_load(xa, max - 1) != xa_mk_value(min));
        XA_BUG_ON(xa, xa_load(xa, max) != NULL);
@@ -458,9 +464,11 @@ static noinline void check_multi_store_2(struct xarray *xa, unsigned long index,
        XA_STATE(xas, xa, index);
        xa_store_order(xa, index, order, xa_mk_value(0), GFP_KERNEL);
 
+       xas_lock(&xas);
        XA_BUG_ON(xa, xas_store(&xas, xa_mk_value(1)) != xa_mk_value(0));
        XA_BUG_ON(xa, xas.xa_index != index);
        XA_BUG_ON(xa, xas_store(&xas, NULL) != xa_mk_value(1));
+       xas_unlock(&xas);
        XA_BUG_ON(xa, !xa_empty(xa));
 }
 #endif
@@ -1180,10 +1188,12 @@ static noinline void check_account(struct xarray *xa)
                XA_STATE(xas, xa, 1 << order);
 
                xa_store_order(xa, 0, order, xa, GFP_KERNEL);
+               rcu_read_lock();
                xas_load(&xas);
                XA_BUG_ON(xa, xas.xa_node->count == 0);
                XA_BUG_ON(xa, xas.xa_node->count > (1 << order));
                XA_BUG_ON(xa, xas.xa_node->nr_values != 0);
+               rcu_read_unlock();
 
                xa_store_order(xa, 1 << order, order, xa_mk_value(1 << order),
                                GFP_KERNEL);