tests/kernel/fifo/fifo_api: Don't reuse name for different thread stacks

A limitation on current HW shadow stack implementation for x86 is that
more than one thread stack can't share the same variable name, even if
they are static. To avoid skipping useful tests, for now, while this
limitation holds, change the name of the stack variable.

Signed-off-by: Ederson de Souza <ederson.desouza@intel.com>

Author: edersondisouza

tests/kernel/fifo/fifo_api/src/test_fifo_cancel.c

@@ -13,7 +13,7 @@ K_FIFO_DEFINE(kfifo_c);
 
 struct k_fifo fifo_c;
 
-static K_THREAD_STACK_DEFINE(tstack, STACK_SIZE);
+static K_THREAD_STACK_DEFINE(tstack_cancel, STACK_SIZE);
 static struct k_thread thread;
 
 static void t_cancel_wait_entry(void *p1, void *p2, void *p3)
@@ -24,7 +24,7 @@ static void t_cancel_wait_entry(void *p1, void *p2, void *p3)
 
 static void tfifo_thread_thread(struct k_fifo *pfifo)
 {
-	k_tid_t tid = k_thread_create(&thread, tstack, STACK_SIZE,
+	k_tid_t tid = k_thread_create(&thread, tstack_cancel, STACK_SIZE,
 				      t_cancel_wait_entry, pfifo, NULL, NULL,
 				      K_PRIO_PREEMPT(0), 0, K_NO_WAIT);
 	uint32_t start_t = k_uptime_get_32();

tests/kernel/fifo/fifo_api/src/test_fifo_contexts.c

@@ -16,7 +16,7 @@ static fdata_t data[LIST_LEN];
 static fdata_t data_l[LIST_LEN];
 static fdata_t data_sl[LIST_LEN];
 
-static K_THREAD_STACK_DEFINE(tstack, STACK_SIZE);
+static K_THREAD_STACK_DEFINE(tstack_contexts, STACK_SIZE);
 static struct k_thread tdata;
 static struct k_sem end_sema;
 
@@ -88,7 +88,7 @@ static void tfifo_thread_thread(struct k_fifo *pfifo)
 {
 	k_sem_init(&end_sema, 0, 1);
 	/**TESTPOINT: thread-thread data passing via fifo*/
-	k_tid_t tid = k_thread_create(&tdata, tstack, STACK_SIZE,
+	k_tid_t tid = k_thread_create(&tdata, tstack_contexts, STACK_SIZE,
 				      tThread_entry, pfifo, NULL, NULL,
 				      K_PRIO_PREEMPT(0), 0, K_NO_WAIT);
 	tfifo_put(pfifo);

tests/kernel/fifo/fifo_api/src/test_fifo_loop.c

@@ -12,7 +12,7 @@
 
 static fdata_t data[LIST_LEN];
 static struct k_fifo fifo;
-static K_THREAD_STACK_DEFINE(tstack, STACK_SIZE);
+static K_THREAD_STACK_DEFINE(tstack_loop, STACK_SIZE);
 static struct k_thread tdata;
 static struct k_sem end_sema;
 
@@ -60,7 +60,7 @@ static void tfifo_read_write(struct k_fifo *pfifo)
 {
 	k_sem_init(&end_sema, 0, 1);
 	/**TESTPOINT: thread-isr-thread data passing via fifo*/
-	k_tid_t tid = k_thread_create(&tdata, tstack, STACK_SIZE,
+	k_tid_t tid = k_thread_create(&tdata, tstack_loop, STACK_SIZE,
 				      tThread_entry, pfifo, NULL, NULL,
 				      K_PRIO_PREEMPT(0), 0, K_NO_WAIT);