1 files changed, 20 insertions, 14 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 00077a57b746..9e5841dc14b5 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3631,22 +3631,20 @@ ftrace_match_record(struct dyn_ftrace *rec, struct ftrace_glob *func_g,
 		/* blank module name to match all modules */
 		if (!mod_g->len) {
 			/* blank module globbing: modname xor exclude_mod */
-			if ((!exclude_mod) != (!modname))
+			if (!exclude_mod != !modname)
 				goto func_match;
 			return 0;
 		}
 
-		/* not matching the module */
-		if (!modname || !mod_matches) {
-			if (exclude_mod)
-				goto func_match;
-			else
-				return 0;
-		}
-
-		if (mod_matches && exclude_mod)
+		/*
+		 * exclude_mod is set to trace everything but the given
+		 * module. If it is set and the module matches, then
+		 * return 0. If it is not set, and the module doesn't match
+		 * also return 0. Otherwise, check the function to see if
+		 * that matches.
+		 */
+		if (!mod_matches == !exclude_mod)
 			return 0;
-
 func_match:
 		/* blank search means to match all funcs in the mod */
 		if (!func_g->len)
@@ -4146,9 +4144,9 @@ unregister_ftrace_function_probe_func(char *glob, struct trace_array *tr,
 	int i, ret = -ENODEV;
 	int size;
 
-	if (glob && (strcmp(glob, "*") == 0 || !strlen(glob)))
+	if (!glob || !strlen(glob) || !strcmp(glob, "*"))
 		func_g.search = NULL;
-	else if (glob) {
+	else {
 		int not;
 
 		func_g.type = filter_parse_regex(glob, strlen(glob),
@@ -4258,6 +4256,14 @@ unregister_ftrace_function_probe_func(char *glob, struct trace_array *tr,
 	return ret;
 }
 
+void clear_ftrace_function_probes(struct trace_array *tr)
+{
+	struct ftrace_func_probe *probe, *n;
+
+	list_for_each_entry_safe(probe, n, &tr->func_probes, list)
+		unregister_ftrace_function_probe_func(NULL, tr, probe->probe_ops);
+}
+
 static LIST_HEAD(ftrace_commands);
 static DEFINE_MUTEX(ftrace_cmd_mutex);
 
@@ -5057,7 +5063,7 @@ ftrace_graph_release(struct inode *inode, struct file *file)
 	}
 
  out:
-	kfree(fgd->new_hash);
+	free_ftrace_hash(fgd->new_hash);
 	kfree(fgd);
 
 	return ret;