Merge branch 'jc/index-update-if-able'

* jc/index-update-if-able:
  update $GIT_INDEX_FILE when there are racily clean entries
  diff/status: refactor opportunistic index update

diff --cc builtin/commit.c
index 3979b823ef4227aac641be48c47581c56423b9d7,0b6ce2fa3757b0d052ee28d716687a70e1c4ca37..54b20497b120bc2bf5ee6e4904eca0ca5d83ff4f
--- 1/builtin/commit.c
--- 2/builtin/commit.c
+++ b/builtin/commit.c
@@@ -1203,15 -1090,11 +1203,10 @@@ int cmd_status(int argc, const char **a
        refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, s.pathspec, NULL, NULL);
  
        fd = hold_locked_index(&index_lock, 0);
-       if (0 <= fd) {
-               if (active_cache_changed &&
-                   !write_cache(fd, active_cache, active_nr))
-                       commit_locked_index(&index_lock);
-               else
-                       rollback_lock_file(&index_lock);
-       }
+       if (0 <= fd)
+               update_index_if_able(&the_index, &index_lock);
  
        s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0;
 -      s.in_merge = in_merge;
        s.ignore_submodule_arg = ignore_submodule_arg;
        wt_status_collect(&s);
  

diff --cc builtin/diff.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc read-cache.c
Simple merge