xarray: Destroy an XArray
This function frees all the internal memory allocated to the xarray
and reinitialises it to be empty.
Signed-off-by: Matthew Wilcox <[email protected]>
diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index e3c2d4d..a96f67ca 100644
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -465,6 +465,39 @@ static noinline void check_find(struct xarray *xa)
check_multi_find_2(xa);
}
+static noinline void check_destroy(struct xarray *xa)
+{
+ unsigned long index;
+
+ XA_BUG_ON(xa, !xa_empty(xa));
+
+ /* Destroying an empty array is a no-op */
+ xa_destroy(xa);
+ XA_BUG_ON(xa, !xa_empty(xa));
+
+ /* Destroying an array with a single entry */
+ for (index = 0; index < 1000; index++) {
+ xa_store_index(xa, index, GFP_KERNEL);
+ XA_BUG_ON(xa, xa_empty(xa));
+ xa_destroy(xa);
+ XA_BUG_ON(xa, !xa_empty(xa));
+ }
+
+ /* Destroying an array with a single entry at ULONG_MAX */
+ xa_store(xa, ULONG_MAX, xa, GFP_KERNEL);
+ XA_BUG_ON(xa, xa_empty(xa));
+ xa_destroy(xa);
+ XA_BUG_ON(xa, !xa_empty(xa));
+
+#ifdef CONFIG_XARRAY_MULTI
+ /* Destroying an array with a multi-index entry */
+ xa_store_order(xa, 1 << 11, 11, xa, GFP_KERNEL);
+ XA_BUG_ON(xa, xa_empty(xa));
+ xa_destroy(xa);
+ XA_BUG_ON(xa, !xa_empty(xa));
+#endif
+}
+
static DEFINE_XARRAY(array);
static int xarray_checks(void)
@@ -478,6 +511,7 @@ static int xarray_checks(void)
check_cmpxchg(&array);
check_multi_store(&array);
check_find(&array);
+ check_destroy(&array);
printk("XArray: %u of %u tests passed\n", tests_passed, tests_run);
return (tests_run == tests_passed) ? 0 : -EINVAL;
