After call of ref_for_same_block, ref1->parent must equals to
ref2->parent, the block of exchange is never reached.

So remove the block of exchange.

Signed-off-by: Su Yue <suy.f...@cn.fujitsu.com>
---
 backref.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/backref.c b/backref.c
index c144dbf060f2..51553c702187 100644
--- a/backref.c
+++ b/backref.c
@@ -497,7 +497,6 @@ static void __merge_refs(struct pref_state *prefstate, int 
mode)
                for (pos2 = pos1->next, n2 = pos2->next; pos2 != head;
                     pos2 = n2, n2 = pos2->next) {
                        struct __prelim_ref *ref2;
-                       struct __prelim_ref *xchg;
                        struct extent_inode_elem *eie;
 
                        ref2 = list_entry(pos2, struct __prelim_ref, list);
@@ -505,11 +504,6 @@ static void __merge_refs(struct pref_state *prefstate, int 
mode)
                        if (mode == 1) {
                                if (!ref_for_same_block(ref1, ref2))
                                        continue;
-                               if (!ref1->parent && ref2->parent) {
-                                       xchg = ref1;
-                                       ref1 = ref2;
-                                       ref2 = xchg;
-                               }
                        } else {
                                if (ref1->parent != ref2->parent)
                                        continue;
-- 
2.17.0



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