tracing: Only create branch tracer options when compiled in

When the branch tracer is not compiled in, do not create the option files
associated to it.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 9 insertions, 2 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 33cd09799ceb..3f1cc45b7007 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -895,6 +895,13 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
 # define FUNCTION_GRAPH_DEFAULT_FLAGS  0UL
 #endif
 
+#ifdef CONFIG_BRANCH_TRACER
+# define BRANCH_FLAGS                                   \
+                C(BRANCH,               "branch"),
+#else
+# define BRANCH_FLAGS
+#endif
+
 /*
  * trace_iterator_flags is an enumeration that defines bit
  * positions into trace_flags that controls the output.
@@ -913,7 +920,6 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
                 C(BLOCK,                "block"),               \
                 C(STACKTRACE,           "stacktrace"),          \
                 C(PRINTK,               "trace_printk"),        \
-                C(BRANCH,               "branch"),              \
                 C(ANNOTATE,             "annotate"),            \
                 C(USERSTACKTRACE,       "userstacktrace"),      \
                 C(SYM_USEROBJ,          "sym-userobj"),         \
@@ -926,7 +932,8 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
                 C(IRQ_INFO,             "irq-info"),            \
                 C(MARKERS,              "markers"),             \
                 C(FUNCTION,             "function-trace"),      \
-                FGRAPH_FLAGS
+                FGRAPH_FLAGS                                    \
+                BRANCH_FLAGS
 
 /*
  * By defining C, we can make TRACE_FLAGS a list of bit names