Add "scheduler-locking" to documentation index

I noticed that "scheduler-locking" does not appear in the index of the
gdb manual.  This patch corrects this oversight.

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 4ae84ec5a6399b9d8472e0d848aeb11224cd79d6..531147f6e6b74288b1dad4a6c21dc7f2eeea93d4 100644 (file)
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -7048,6 +7048,7 @@ locking the OS scheduler to allow only a single thread to run.
 
 @table @code
 @item set scheduler-locking @var{mode}
+@cindex scheduler-locking
 @cindex scheduler locking mode
 @cindex lock scheduler
 Set the scheduler locking mode.  It applies to normal execution,