hashmap: introduce hash_ops to make struct Hashmap smaller

It is redundant to store 'hash' and 'compare' function pointers in
struct Hashmap separately. The functions always comprise a pair.
Store a single pointer to struct hash_ops instead.

systemd keeps hundreds of hashmaps, so this saves a little bit of
memory.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/remount-fs/remount-fs.c b/src/remount-fs/remount-fs.c
index 847637a12c..cd7cfe7a47 100644
--- a/src/remount-fs/remount-fs.c
+++ b/src/remount-fs/remount-fs.c
@@ -64,7 +64,7 @@ int main(int argc, char *argv[]) {
                 return EXIT_FAILURE;
         }
 
-        pids = hashmap_new(trivial_hash_func, trivial_compare_func);
+        pids = hashmap_new(NULL);
         if (!pids) {
                 log_error("Failed to allocate set");
                 goto finish;