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>

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index bd1bf184c5c98b6cc36d5c7e183bd4698702a514..f93a219b18daaa92ed314ad7ac4ba8e0ed3c4c09 100644 (file)
--- 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,