cache.h: document `write_locked_index()`

diff --git a/merge.c b/merge.c
index 1d441ad94254257ad2ac28b8a17dc0b8e5ce14f9..a18a452b5c88597e146ad1771e03d5bf8f07566d 100644 (file)
--- a/merge.c
+++ b/merge.c
@@ -53,11 +53,11 @@ int checkout_fast_forward(const struct object_id *head,
        struct tree_desc t[MAX_UNPACK_TREES];
        int i, nr_trees = 0;
        struct dir_struct dir;
-       struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+       struct lock_file lock_file = LOCK_INIT;
 
        refresh_cache(REFRESH_QUIET);
 
-       if (hold_locked_index(lock_file, LOCK_REPORT_ON_ERROR) < 0)
+       if (hold_locked_index(&lock_file, LOCK_REPORT_ON_ERROR) < 0)
                return -1;
 
        memset(&trees, 0, sizeof(trees));
@@ -91,8 +91,8 @@ int checkout_fast_forward(const struct object_id *head,
        }
        if (unpack_trees(nr_trees, t, &opts))
                return -1;
-       if (write_locked_index(&the_index, lock_file, COMMIT_LOCK)) {
-               rollback_lock_file(lock_file);
+       if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK)) {
+               rollback_lock_file(&lock_file);
                return error(_("unable to write new index file"));
        }
        return 0;