docs: Fix Sphinx toctree warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167905 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/subsystems.rst b/docs/subsystems.rst
index 80d0eed6633932b13372e9e946d032671f266f35..1c4fd232deb95e008884969ea7bd75dff4285d06 100644 (file)
--- a/docs/subsystems.rst
+++ b/docs/subsystems.rst
@@ -18,6 +18,10 @@ Subsystem Documentation
    DebuggingJITedCode
    GoldPlugin
    MarkedUpDisassembly
+   HowToUseInstrMappings
+
+.. FIXME: once LangRef is Sphinxified, HowToUseInstrMappings should be put
+   under LangRef's toctree instead of this page's toctree.
 
 * `Writing an LLVM Pass <WritingAnLLVMPass.html>`_