[PATCH v2] kunit: test: Avoid cast warning when adding kfree() as an action

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In kunit_log_test() pass the kfree_wrapper() function to kunit_add_action()
instead of directly passing kfree().

This prevents a cast warning:

lib/kunit/kunit-test.c:565:25: warning: cast from 'void (*)(const void *)'
to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible
function type [-Wcast-function-type-strict]

   564		full_log = string_stream_get_string(test->log);
 > 565		kunit_add_action(test, (kunit_action_t *)kfree, full_log);

Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202311070041.kWVYx7YP-lkp@xxxxxxxxx/
Fixes: 05e2006ce493 ("kunit: Use string_stream for test log")
---
 lib/kunit/kunit-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c
index 99d2a3a528e1..de2113a58fa0 100644
--- a/lib/kunit/kunit-test.c
+++ b/lib/kunit/kunit-test.c
@@ -562,7 +562,7 @@ static void kunit_log_test(struct kunit *test)
 	KUNIT_EXPECT_TRUE(test, test->log->append_newlines);
 
 	full_log = string_stream_get_string(test->log);
-	kunit_add_action(test, (kunit_action_t *)kfree, full_log);
+	kunit_add_action(test, kfree_wrapper, full_log);
 	KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
 				     strstr(full_log, "put this in log."));
 	KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
-- 
2.30.2




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