[LTP] [PATCH v1] Fix ltp-aiodio tests failing on s390

[Andrea Cervesato]

run_child flag is commonly used by aiodio tests in order to check if
tests are passed or not and compiler seems to optimize run_child flag
because it's not defined as volatile. With this patch we ensure that the
flag is set as volatile so tests will work as expected on s390.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.de>
---
 testcases/kernel/io/ltp-aiodio/aiodio_append.c | 4 ++--
 testcases/kernel/io/ltp-aiodio/aiodio_sparse.c | 4 ++--
 testcases/kernel/io/ltp-aiodio/dio_append.c    | 7 +++++--
 testcases/kernel/io/ltp-aiodio/dio_sparse.c    | 4 ++--
 testcases/kernel/io/ltp-aiodio/dio_truncate.c  | 4 ++--
 5 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/testcases/kernel/io/ltp-aiodio/aiodio_append.c b/testcases/kernel/io/ltp-aiodio/aiodio_append.c
index 46cc74ee4..e42c577cd 100644
--- a/testcases/kernel/io/ltp-aiodio/aiodio_append.c
+++ b/testcases/kernel/io/ltp-aiodio/aiodio_append.c
@@ -24,7 +24,7 @@
 #include <libaio.h>
 #include "common.h"
 
-static int *run_child;
+static volatile int *run_child;
 
 static char *str_numchildren;
 static char *str_writesize;
@@ -133,7 +133,7 @@ static void cleanup(void)
 {
 	if (run_child) {
 		*run_child = 0;
-		SAFE_MUNMAP(run_child, sizeof(int));
+		SAFE_MUNMAP((void *)run_child, sizeof(int));
 	}
 }
 
diff --git a/testcases/kernel/io/ltp-aiodio/aiodio_sparse.c b/testcases/kernel/io/ltp-aiodio/aiodio_sparse.c
index 2aa5662bb..9aa9b8d54 100644
--- a/testcases/kernel/io/ltp-aiodio/aiodio_sparse.c
+++ b/testcases/kernel/io/ltp-aiodio/aiodio_sparse.c
@@ -28,7 +28,7 @@
 #include <libaio.h>
 #include "common.h"
 
-static int *run_child;
+static volatile int *run_child;
 
 static char *str_numchildren;
 static char *str_writesize;
@@ -181,7 +181,7 @@ static void cleanup(void)
 {
 	if (run_child) {
 		*run_child = 0;
-		SAFE_MUNMAP(run_child, sizeof(int));
+		SAFE_MUNMAP((void *)run_child, sizeof(int));
 	}
 }
 
diff --git a/testcases/kernel/io/ltp-aiodio/dio_append.c b/testcases/kernel/io/ltp-aiodio/dio_append.c
index c099793f6..3a7e7c836 100644
--- a/testcases/kernel/io/ltp-aiodio/dio_append.c
+++ b/testcases/kernel/io/ltp-aiodio/dio_append.c
@@ -19,7 +19,7 @@
 #include "tst_test.h"
 #include "common.h"
 
-static int *run_child;
+static volatile int *run_child;
 
 static char *str_numchildren;
 static char *str_writesize;
@@ -49,7 +49,10 @@ static void setup(void)
 
 static void cleanup(void)
 {
-	SAFE_MUNMAP(run_child, sizeof(int));
+	if (run_child) {
+		*run_child = 0;
+		SAFE_MUNMAP((void *)run_child, sizeof(int));
+	}
 }
 
 static void run(void)
diff --git a/testcases/kernel/io/ltp-aiodio/dio_sparse.c b/testcases/kernel/io/ltp-aiodio/dio_sparse.c
index 0039daa8d..661afde4c 100644
--- a/testcases/kernel/io/ltp-aiodio/dio_sparse.c
+++ b/testcases/kernel/io/ltp-aiodio/dio_sparse.c
@@ -26,7 +26,7 @@
 #include "tst_test.h"
 #include "common.h"
 
-static int *run_child;
+static volatile int *run_child;
 
 static char *str_numchildren;
 static char *str_writesize;
@@ -85,7 +85,7 @@ static void cleanup(void)
 {
 	if (run_child) {
 		*run_child = 0;
-		SAFE_MUNMAP(run_child, sizeof(int));
+		SAFE_MUNMAP((void *)run_child, sizeof(int));
 	}
 }
 
diff --git a/testcases/kernel/io/ltp-aiodio/dio_truncate.c b/testcases/kernel/io/ltp-aiodio/dio_truncate.c
index 1fbf83de0..0fe6b87ac 100644
--- a/testcases/kernel/io/ltp-aiodio/dio_truncate.c
+++ b/testcases/kernel/io/ltp-aiodio/dio_truncate.c
@@ -33,7 +33,7 @@
 #include "tst_test.h"
 #include "common.h"
 
-static int *run_child;
+static volatile int *run_child;
 
 static char *str_numchildren;
 static char *str_filesize;
@@ -109,7 +109,7 @@ static void cleanup(void)
 {
 	if (run_child) {
 		*run_child = 0;
-		SAFE_MUNMAP(run_child, sizeof(int));
+		SAFE_MUNMAP((void *)run_child, sizeof(int));
 	}
 }
 
-- 
2.36.1