diff.c: factor out diff_flush_patch_all_file_pairs

diff --git a/read-cache.c b/read-cache.c
index ad692e198d9b869883017c941be76b05be6f7d7a..3c4354ee21c898813e3fdbecf82a5e703e3f1b5e 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -1895,8 +1895,7 @@ int discard_index(struct index_state *istate)
        free_name_hash(istate);
        cache_tree_free(&(istate->cache_tree));
        istate->initialized = 0;
-       free(istate->cache);
-       istate->cache = NULL;
+       FREE_AND_NULL(istate->cache);
        istate->cache_alloc = 0;
        discard_split_index(istate);
        free_untracked_cache(istate->untracked);
@@ -2610,8 +2609,7 @@ void *read_blob_data_from_index(const struct index_state *istate,
 
 void stat_validity_clear(struct stat_validity *sv)
 {
-       free(sv->sd);
-       sv->sd = NULL;
+       FREE_AND_NULL(sv->sd);
 }
 
 int stat_validity_check(struct stat_validity *sv, const char *path)