tracing: Only create stacktrace option when STACKTRACE is configured

Only create the stacktrace trace option when CONFIG_STACKTRACE is
configured.

Cleaned up the ftrace_trace_stack() function call a little to allow better
encapsulation of the stacktrace trace flag.

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

1 files changed, 8 insertions, 1 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b389d409b952..af34e1822dad 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -911,6 +911,13 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
 # define FUNCTION_DEFAULT_FLAGS         0UL
 #endif
 
+#ifdef CONFIG_STACKTRACE
+# define STACK_FLAGS                            \
+                C(STACKTRACE,           "stacktrace"),
+#else
+# define STACK_FLAGS
+#endif
+
 /*
  * trace_iterator_flags is an enumeration that defines bit
  * positions into trace_flags that controls the output.
@@ -927,7 +934,6 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
                 C(HEX,                  "hex"),                 \
                 C(BIN,                  "bin"),                 \
                 C(BLOCK,                "block"),               \
-                C(STACKTRACE,           "stacktrace"),          \
                 C(PRINTK,               "trace_printk"),        \
                 C(ANNOTATE,             "annotate"),            \
                 C(USERSTACKTRACE,       "userstacktrace"),      \
@@ -942,6 +948,7 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
                 C(MARKERS,              "markers"),             \
                 FUNCTION_FLAGS                                  \
                 FGRAPH_FLAGS                                    \
+                STACK_FLAGS                                     \
                 BRANCH_FLAGS
 
 /*