XArray: Fix infinite loop with entry at ULONG_MAX

[linux-2.6-microblaze.git] / lib / test_xarray.c

diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index c477f22..90584c6 100644 (file)
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -1046,11 +1046,28 @@ static noinline void check_find_3(struct xarray *xa)
        xa_destroy(xa);
 }
 
+static noinline void check_find_4(struct xarray *xa)
+{
+       unsigned long index = 0;
+       void *entry;
+
+       xa_store_index(xa, ULONG_MAX, GFP_KERNEL);
+
+       entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT);
+       XA_BUG_ON(xa, entry != xa_mk_index(ULONG_MAX));
+
+       entry = xa_find_after(xa, &index, ULONG_MAX, XA_PRESENT);
+       XA_BUG_ON(xa, entry);
+
+       xa_erase_index(xa, ULONG_MAX);
+}
+
 static noinline void check_find(struct xarray *xa)
 {
        check_find_1(xa);
        check_find_2(xa);
        check_find_3(xa);
+       check_find_4(xa);
        check_multi_find(xa);
        check_multi_find_2(xa);
 }