X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=lib%2Ffault-inject.c;h=b18fc2ff9ffea5df3d3377fc092bb8306d556fd2;hb=485cf925d8b7a6b3c62fe5f1e167f2d0d4edf32a;hp=d143c0faf248f8485f45c6ad655283e9388f8284;hpb=cd39301a68f9604854f3543117b01dc73cbe193f;p=powerpc.git

diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index d143c0faf2..b18fc2ff9f 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -55,37 +55,7 @@ static bool fail_task(struct fault_attr *attr, struct task_struct *task)
 
 #define MAX_STACK_TRACE_DEPTH 32
 
-#ifdef CONFIG_STACK_UNWIND
-
-static asmlinkage int fail_stacktrace_callback(struct unwind_frame_info *info,
-						void *arg)
-{
-	int depth;
-	struct fault_attr *attr = arg;
-	bool found = (attr->require_start == 0 && attr->require_end == ULONG_MAX);
-
-	for (depth = 0; depth < attr->stacktrace_depth
-			&& unwind(info) == 0 && UNW_PC(info); depth++) {
-		if (arch_unw_user_mode(info))
-			break;
-		if (attr->reject_start <= UNW_PC(info) &&
-			       UNW_PC(info) < attr->reject_end)
-			return false;
-		if (attr->require_start <= UNW_PC(info) &&
-			       UNW_PC(info) < attr->require_end)
-			found = true;
-	}
-	return found;
-}
-
-static bool fail_stacktrace(struct fault_attr *attr)
-{
-	struct unwind_frame_info info;
-
-	return unwind_init_running(&info, fail_stacktrace_callback, attr);
-}
-
-#elif defined(CONFIG_STACKTRACE)
+#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
 
 static bool fail_stacktrace(struct fault_attr *attr)
 {
@@ -102,9 +72,8 @@ static bool fail_stacktrace(struct fault_attr *attr)
 	trace.entries = entries;
 	trace.max_entries = depth;
 	trace.skip = 1;
-	trace.all_contexts = 0;
 
-	save_stack_trace(&trace, NULL);
+	save_stack_trace(&trace);
 	for (n = 0; n < trace.nr_entries; n++) {
 		if (attr->reject_start <= entries[n] &&
 			       entries[n] < attr->reject_end)
@@ -120,17 +89,10 @@ static bool fail_stacktrace(struct fault_attr *attr)
 
 static inline bool fail_stacktrace(struct fault_attr *attr)
 {
-	static bool firsttime = true;
-
-	if (firsttime) {
-		printk(KERN_WARNING
-		"This architecture does not implement save_stack_trace()\n");
-		firsttime = false;
-	}
-	return false;
+	return true;
 }
 
-#endif
+#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
 
 /*
  * This code is stolen from failmalloc-1.0
@@ -247,6 +209,8 @@ void cleanup_fault_attr_dentries(struct fault_attr *attr)
 	debugfs_remove(attr->dentries.task_filter_file);
 	attr->dentries.task_filter_file = NULL;
 
+#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
+
 	debugfs_remove(attr->dentries.stacktrace_depth_file);
 	attr->dentries.stacktrace_depth_file = NULL;
 
@@ -262,6 +226,8 @@ void cleanup_fault_attr_dentries(struct fault_attr *attr)
 	debugfs_remove(attr->dentries.reject_end_file);
 	attr->dentries.reject_end_file = NULL;
 
+#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
+
 	if (attr->dentries.dir)
 		WARN_ON(!simple_empty(attr->dentries.dir));
 
@@ -299,6 +265,13 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
 	attr->dentries.task_filter_file = debugfs_create_bool("task-filter",
 						mode, dir, &attr->task_filter);
 
+	if (!attr->dentries.probability_file || !attr->dentries.interval_file ||
+	    !attr->dentries.times_file || !attr->dentries.space_file ||
+	    !attr->dentries.verbose_file || !attr->dentries.task_filter_file)
+		goto fail;
+
+#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
+
 	attr->dentries.stacktrace_depth_file =
 		debugfs_create_ul_MAX_STACK_TRACE_DEPTH(
 			"stacktrace-depth", mode, dir, &attr->stacktrace_depth);
@@ -315,18 +288,15 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
 	attr->dentries.reject_end_file =
 		debugfs_create_ul("reject-end", mode, dir, &attr->reject_end);
 
-
-	if (!attr->dentries.probability_file || !attr->dentries.interval_file
-	    || !attr->dentries.times_file || !attr->dentries.space_file
-	    || !attr->dentries.verbose_file || !attr->dentries.task_filter_file
-	    || !attr->dentries.stacktrace_depth_file
-	    || !attr->dentries.require_start_file
-	    || !attr->dentries.require_end_file
-	    || !attr->dentries.reject_start_file
-	    || !attr->dentries.reject_end_file
-	    )
+	if (!attr->dentries.stacktrace_depth_file ||
+	    !attr->dentries.require_start_file ||
+	    !attr->dentries.require_end_file ||
+	    !attr->dentries.reject_start_file ||
+	    !attr->dentries.reject_end_file)
 		goto fail;
 
+#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
+
 	return 0;
 fail:
 	cleanup_fault_attr_dentries(attr);