tracing: is_legal_op() can return boolean

Make is_legal_op() return bool to improve readability due to this particular
function only using either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1443537816-5788-8-git-send-email-bywxiaobai@163.com

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index bd1bf184c5c9..f93a219b18da 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -973,15 +973,15 @@ static bool is_string_field(struct ftrace_event_field *field)
                field->filter_type == FILTER_PTR_STRING;
 }
 
-static int is_legal_op(struct ftrace_event_field *field, int op)
+static bool is_legal_op(struct ftrace_event_field *field, int op)
 {
         if (is_string_field(field) &&
             (op != OP_EQ && op != OP_NE && op != OP_GLOB))
-                return 0;
+                return false;
         if (!is_string_field(field) && op == OP_GLOB)
-                return 0;
+                return false;
 
-        return 1;
+        return true;
 }
 
 static filter_pred_fn_t select_comparison_fn(int op, int field_size,