test: Thread function is a candidate for attribute noreturn.

The start_test_thread function never returns, it is always
cancelled by the main thread.
(cherry picked from commit b9cb387a109f4d09cdef84a62194201e78f97cb7)

1 files changed, 1 insertions, 3 deletions

diff --git a/tests/c-api/test-user-cancel.c b/tests/c-api/test-user-cancel.c
index 4908f953..25faf619 100644
--- a/tests/c-api/test-user-cancel.c
+++ b/tests/c-api/test-user-cancel.c
@@ -50,7 +50,7 @@ static const char *filename = "test.img";
 static const off_t filesize = 1024*1024*1024;
 
 static void remove_test_img (void);
-static void *start_test_thread (void *);
+static void *start_test_thread (void *) __attribute__((noreturn));
 static off_t random_cancel_posn (void);
 
 struct test_thread_data {
@@ -327,8 +327,6 @@ start_test_thread (void *datav)
     while (1)
       pause ();
   }
-
-  return NULL;
 }
 
 static double random_gauss (double mu, double sd);