block: add secure discard

[karo-tx-linux.git] / include / linux / ftrace.h

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 41e46330d9bedfd16d46a920cbd840dad54afffe..dcd6a7c3a4358b310b430a16dc52f43b547e02f2 100644 (file)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -1,3 +1,8 @@
+/*
+ * Ftrace header.  For implementation details beyond the random comments
+ * scattered below, see: Documentation/trace/ftrace-design.txt
+ */
+
 #ifndef _LINUX_FTRACE_H
 #define _LINUX_FTRACE_H