Here is the right patch.
I'm sorry for my carelessness.

Signed-off-by: Miao Xie <[email protected]>
Signed-off-by: Liu Bo <[email protected]>
---
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_def_task01.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_def_task01.c
index 00a25bc..1fb398a 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_def_task01.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_def_task01.c
@@ -82,7 +82,7 @@ extern void cleanup()
        kill(scriptpid, SIGUSR1);/* Inform the shell to do cleanup*/
        tst_exit();             /* Report exit status*/
 }
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char *argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_def_task02.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_def_task02.c
index 1bfa187..56ddacc 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_def_task02.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_def_task02.c
@@ -79,7 +79,7 @@ cleanup()
        tst_exit();             /* Report exit status*/
 }
 
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char *argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_def_task03.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_def_task03.c
index e4ce3ad..4f3ddc1 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_def_task03.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_def_task03.c
@@ -79,7 +79,7 @@ cleanup()
        tst_exit();               /* Report exit status*/
 }
 
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char *argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c
index 15e2b5f..7f184c8 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c
@@ -78,7 +78,7 @@ cleanup()
        tst_exit();               /* Report exit status*/
 }
 
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char *argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_test01.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_test01.c
index ab0a4c9..7d7cc48 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_test01.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_test01.c
@@ -80,7 +80,7 @@ cleanup()
        kill (scriptpid, SIGUSR1);/* Inform the shell to do cleanup*/
        tst_exit ();            /* Report exit status*/
 }
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char* argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_test02.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_test02.c
index 801716d..153a293 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_test02.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_test02.c
@@ -80,7 +80,7 @@ cleanup()
 }
 
 int migrate_task ();
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char* argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_test03.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_test03.c
index c4b9978..c21b69c 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_test03.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_test03.c
@@ -79,7 +79,7 @@ cleanup()
        tst_exit ();              /* Report exit status*/
 }
 
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char* argv[])
 {
diff --git a/testcases/kernel/controllers/cpuctl/cpuctl_test04.c 
b/testcases/kernel/controllers/cpuctl/cpuctl_test04.c
index b0a2329..ed00b0d 100644
--- a/testcases/kernel/controllers/cpuctl/cpuctl_test04.c
+++ b/testcases/kernel/controllers/cpuctl/cpuctl_test04.c
@@ -79,7 +79,7 @@ cleanup()
        tst_exit ();              /* Report exit status*/
 }
 
-int timer_expired = 0;
+volatile int timer_expired = 0;
 
 int main(int argc, char* argv[])
 {
diff --git a/testcases/kernel/controllers/libcontrollers/libcontrollers.h 
b/testcases/kernel/controllers/libcontrollers/libcontrollers.h
index 777ff67..e6ab6a0 100644
--- a/testcases/kernel/controllers/libcontrollers/libcontrollers.h
+++ b/testcases/kernel/controllers/libcontrollers/libcontrollers.h
@@ -48,7 +48,8 @@ char fullpath[PATH_MAX];
 char fullpath[1024]; /* Guess */
 #endif
 
-int FLAG, timer_expired;
+int FLAG;
+volatile int timer_expired;
 
 int retval;

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