Make fsck reachability avoid doing unnecessary work for

parents that we reach multiple ways.

This doesn't matter right now. It _will_ matter once we have
complex revision graphs.

diff --git a/fsck-cache.c b/fsck-cache.c
index bb2b867..34c8081 100644 (file)
--- a/fsck-cache.c
+++ b/fsck-cache.c
@@ -108,6 +108,9 @@ static void mark_reachable(struct revision *rev)
 {
        struct parent *p = rev->parent;
 
+       /* If we've been here already, don't bother */
+       if (rev->flags & REACHABLE)
+               return;
        rev->flags |= REACHABLE | USED;
        while (p) {
                mark_reachable(p->parent);