tracing: Add build bug if we have more trace_flags than bits

[cascardo/linux.git] / kernel / trace / trace.h

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 8ed9787..0715565 100644 (file)
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -966,7 +966,11 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
 #undef C
 #define C(a, b) TRACE_ITER_##a##_BIT
 
-enum trace_iterator_bits { TRACE_FLAGS };
+enum trace_iterator_bits {
+       TRACE_FLAGS
+       /* Make sure we don't go more than we have bits for */
+       TRACE_ITER_LAST_BIT
+};
 
 /*
  * By redefining C, we can make TRACE_FLAGS a list of masks that