If o->merge is set, the struct traverse_info member conflicts is shifted
left in unpack_callback, then passed through traverse_trees_recursive
to unpack_nondirectories, where it is shifted right before use.  Stop
the shifting and just pass the conflict bit mask as is.  Rename the
member to df_conflicts to prove that it isn't used anywhere else.

Signed-off-by: René Scharfe <rene.scha...@lsrfire.ath.cx>
---
 tree-walk.h    |  2 +-
 unpack-trees.c | 18 +++---------------
 2 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/tree-walk.h b/tree-walk.h
index 2bf0db9..ae04b64 100644
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -46,7 +46,7 @@ struct traverse_info {
        int pathlen;
        struct pathspec *pathspec;
 
-       unsigned long conflicts;
+       unsigned long df_conflicts;
        traverse_callback_t fn;
        void *data;
        int show_all_errors;
diff --git a/unpack-trees.c b/unpack-trees.c
index 57b4074..b27f2a6 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -464,7 +464,7 @@ static int traverse_trees_recursive(int n, unsigned long 
dirmask,
        newinfo.pathspec = info->pathspec;
        newinfo.name = *p;
        newinfo.pathlen += tree_entry_len(p) + 1;
-       newinfo.conflicts |= df_conflicts;
+       newinfo.df_conflicts |= df_conflicts;
 
        for (i = 0; i < n; i++, dirmask >>= 1) {
                const unsigned char *sha1 = NULL;
@@ -565,17 +565,12 @@ static int unpack_nondirectories(int n, unsigned long 
mask,
 {
        int i;
        struct unpack_trees_options *o = info->data;
-       unsigned long conflicts;
+       unsigned long conflicts = info->df_conflicts | dirmask;
 
        /* Do we have *only* directories? Nothing to do */
        if (mask == dirmask && !src[0])
                return 0;
 
-       conflicts = info->conflicts;
-       if (o->merge)
-               conflicts >>= 1;
-       conflicts |= dirmask;
-
        /*
         * Ok, we've filled in up to any potential index entry in src[0],
         * now do the rest.
@@ -807,13 +802,6 @@ static int unpack_callback(int n, unsigned long mask, 
unsigned long dirmask, str
 
        /* Now handle any directories.. */
        if (dirmask) {
-               unsigned long conflicts = mask & ~dirmask;
-               if (o->merge) {
-                       conflicts <<= 1;
-                       if (src[0])
-                               conflicts |= 1;
-               }
-
                /* special case: "diff-index --cached" looking at a tree */
                if (o->diff_index_cached &&
                    n == 1 && dirmask == 1 && S_ISDIR(names->mode)) {
@@ -832,7 +820,7 @@ static int unpack_callback(int n, unsigned long mask, 
unsigned long dirmask, str
                        }
                }
 
-               if (traverse_trees_recursive(n, dirmask, conflicts,
+               if (traverse_trees_recursive(n, dirmask, mask & ~dirmask,
                                             names, info) < 0)
                        return -1;
                return mask;
-- 
1.8.3

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