1 files changed, 44 insertions, 0 deletions

diff --git a/lib/test_sort.c b/lib/test_sort.c
new file mode 100644
index 000000000000..4db3911db50a
--- /dev/null
+++ b/lib/test_sort.c
@@ -0,0 +1,44 @@
+#include <linux/sort.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+
+/*
+ * A simple boot-time regression test
+ * License: GPL
+ */
+
+#define TEST_LEN 1000
+
+static int __init cmpint(const void *a, const void *b)
+{
+        return *(int *)a - *(int *)b;
+}
+
+static int __init test_sort_init(void)
+{
+        int *a, i, r = 1, err = -ENOMEM;
+
+        a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL);
+        if (!a)
+                return err;
+
+        for (i = 0; i < TEST_LEN; i++) {
+                r = (r * 725861) % 6599;
+                a[i] = r;
+        }
+
+        sort(a, TEST_LEN, sizeof(*a), cmpint, NULL);
+
+        err = -EINVAL;
+        for (i = 0; i < TEST_LEN-1; i++)
+                if (a[i] > a[i+1]) {
+                        pr_err("test has failed\n");
+                        goto exit;
+                }
+        err = 0;
+        pr_info("test passed\n");
+exit:
+        kfree(a);
+        return err;
+}
+subsys_initcall(test_sort_init);