trace2: use system/global config for default trace2 settings

diff --git a/Documentation/technical/api-diff.txt b/Documentation/technical/api-diff.txt
index 2d2ebc04b74ef2b1bf39df892d303d37076325d1..30fc0e9c93b2562b87abb107acf5ad2ae1c7fea0 100644 (file)
--- a/Documentation/technical/api-diff.txt
+++ b/Documentation/technical/api-diff.txt
@@ -18,8 +18,8 @@ Calling sequence
 ----------------
 
 * Prepare `struct diff_options` to record the set of diff options, and
-  then call `diff_setup()` to initialize this structure.  This sets up
-  the vanilla default.
+  then call `repo_diff_setup()` to initialize this structure.  This
+  sets up the vanilla default.
 
 * Fill in the options structure to specify desired output format, rename
   detection, etc.  `diff_opt_parse()` can be used to parse options given
@@ -28,7 +28,8 @@ Calling sequence
 
 * Call `diff_setup_done()`; this inspects the options set up so far for
   internal consistency and make necessary tweaking to it (e.g. if
-  textual patch output was asked, recursive behaviour is turned on).
+  textual patch output was asked, recursive behaviour is turned on);
+  the callback set_default in diff_options can be used to tweak this more.
 
 * As you find different pairs of files, call `diff_change()` to feed
   modified files, `diff_addremove()` to feed created or deleted files,
@@ -115,6 +116,13 @@ Notable members are:
        operation, but some do not have anything to do with the diffcore
        library.
 
+`touched_flags`::
+       Records whether a flag has been changed due to user request
+       (rather than just set/unset by default).
+
+`set_default`::
+       Callback which allows tweaking the options in diff_setup_done().
+
 BINARY, TEXT;;
        Affects the way how a file that is seemingly binary is treated.