diff --git a/[refs] b/[refs]
index 0643bcfc4694..476889d3a889 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3aafe5ae08f2aed378e06d78b207883879d25cbe
+refs/heads/master: 0fe7d7e9761ec7e23350b5543ddac470bb3cde1e
diff --git a/trunk/tools/perf/Documentation/jit-interface.txt b/trunk/tools/perf/Documentation/jit-interface.txt
new file mode 100644
index 000000000000..a8656f564915
--- /dev/null
+++ b/trunk/tools/perf/Documentation/jit-interface.txt
@@ -0,0 +1,15 @@
+perf supports a simple JIT interface to resolve symbols for dynamic code generated
+by a JIT.
+
+The JIT has to write a /tmp/perf-%d.map  (%d = pid of process) file
+
+This is a text file.
+
+Each line has the following format, fields separated with spaces:
+
+START SIZE symbolname
+
+START and SIZE are hex numbers without 0x.
+symbolname is the rest of the line, so it could contain special characters.
+
+The ownership of the file has to match the process.