XArray: Permit storing 2-byte-aligned pointers

[thirdparty/kernel/stable.git] / lib / test_xarray.c

diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index dc02eff562b8a044f3509e2c12e5dfc18933757f..6e0212a60b08e912253aa9f3bffd3a92d2781f02 100644 (file)
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -1184,6 +1184,35 @@ static noinline void check_store_range(struct xarray *xa)
        }
 }
 
+static void check_align_1(struct xarray *xa, char *name)
+{
+       int i;
+       unsigned int id;
+       unsigned long index;
+       void *entry;
+
+       for (i = 0; i < 8; i++) {
+               id = 0;
+               XA_BUG_ON(xa, xa_alloc(xa, &id, UINT_MAX, name + i, GFP_KERNEL)
+                               != 0);
+               XA_BUG_ON(xa, id != i);
+       }
+       xa_for_each(xa, index, entry)
+               XA_BUG_ON(xa, xa_is_err(entry));
+       xa_destroy(xa);
+}
+
+static noinline void check_align(struct xarray *xa)
+{
+       char name[] = "Motorola 68000";
+
+       check_align_1(xa, name);
+       check_align_1(xa, name + 1);
+       check_align_1(xa, name + 2);
+       check_align_1(xa, name + 3);
+//     check_align_2(xa, name);
+}
+
 static LIST_HEAD(shadow_nodes);
 
 static void test_update_node(struct xa_node *node)
@@ -1333,6 +1362,7 @@ static int xarray_checks(void)
        check_create_range(&array);
        check_store_range(&array);
        check_store_iter(&array);
+       check_align(&xa0);
 
        check_workingset(&array, 0);
        check_workingset(&array, 64);