qcacmn: Use save_stack_trace_tsk() to save task stack trace

qdf_print_thread_trace() currently uses stack_trace_save_tsk() to save
task stack strace into a storage array, but stack_trace_save_tsk() is
undefined because it is not exported. Switch to using
save_stack_trace_tsk() as originally was done.

Change-Id: Ie90cdd87233581718e9a40436128a92691fc9a17
CRs-Fixed: 2587454

qdf/linux/src/qdf_threads.c

@@ -190,7 +190,7 @@ qdf_export_symbol(qdf_wake_up_process);
 #if ((defined(WLAN_HOST_ARCH_ARM) && !WLAN_HOST_ARCH_ARM) || \
 	LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) || \
 	defined(BACKPORTED_EXPORT_SAVE_STACK_TRACE_TSK_ARM)) && \
-	defined(CONFIG_STACKTRACE)
+	defined(CONFIG_STACKTRACE) && !defined(CONFIG_ARCH_STACKWALK)
 #define QDF_PRINT_TRACE_COUNT 32
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0))
@@ -199,12 +199,15 @@ void qdf_print_thread_trace(qdf_thread_t *thread)
 	const int spaces = 4;
 	struct task_struct *task = thread;
 	unsigned long entries[QDF_PRINT_TRACE_COUNT] = {0};
-	unsigned int nr_entries;
-	unsigned int max_entries = QDF_PRINT_TRACE_COUNT;
-	int skip = 0;
+	struct stack_trace trace = {
+		.nr_entries = 0,
+		.skip = 0,
+		.entries = &entries[0],
+		.max_entries = QDF_PRINT_TRACE_COUNT,
+	};
 
-	nr_entries = stack_trace_save_tsk(task, entries, max_entries, skip);
-	stack_trace_print(entries, nr_entries, spaces);
+	save_stack_trace_tsk(task, &trace);
+	stack_trace_print(entries, trace.nr_entries, spaces);
 }
 #else
 void qdf_print_thread_trace(qdf_thread_t *thread)