kasan: check CONFIG_KASAN_KUNIT_TEST instead of CONFIG_KUNIT

Check the more specific CONFIG_KASAN_KUNIT_TEST config option when
defining things related to KUnit-compatible KASAN tests instead of
CONFIG_KUNIT.

Also put the kunit_kasan_status definition next to the definitons of other
KASAN-related structs.

Link: https://lkml.kernel.org/r/223592d38d2a601a160a3b2b3d5a9f9090350e62.1646237226.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/kasan/kasan.h

@@ -7,16 +7,6 @@
 #include <linux/kfence.h>
 #include <linux/stackdepot.h>
 
-#if IS_ENABLED(CONFIG_KUNIT)
-
-/* Used in KUnit-compatible KASAN tests. */
-struct kunit_kasan_status {
-	bool report_found;
-	bool sync_fault;
-};
-
-#endif
-
 #ifdef CONFIG_KASAN_HW_TAGS
 
 #include <linux/static_key.h>
@@ -224,6 +214,14 @@ struct kasan_free_meta {
 #endif
 };
 
+#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
+/* Used in KUnit-compatible KASAN tests. */
+struct kunit_kasan_status {
+	bool report_found;
+	bool sync_fault;
+};
+#endif
+
 struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
 						const void *object);
 #ifdef CONFIG_KASAN_GENERIC

mm/kasan/report.c

@@ -356,7 +356,7 @@ static bool report_enabled(void)
 	return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags);
 }
 
-#if IS_ENABLED(CONFIG_KUNIT)
+#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
 static void update_kunit_status(bool sync)
 {
 	struct kunit *test;