dirty-bitmap: rename bdrv_undo_clear_dirty_bitmap

Use more generic names to reuse the function for bitmap merge in the
following commit.
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>

block/dirty-bitmap.c

@@ -633,12 +633,12 @@ void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out)
     bdrv_dirty_bitmap_unlock(bitmap);
 }
 
-void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in)
+void bdrv_restore_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *backup)
 {
     HBitmap *tmp = bitmap->bitmap;
     assert(bdrv_dirty_bitmap_enabled(bitmap));
     assert(!bdrv_dirty_bitmap_readonly(bitmap));
-    bitmap->bitmap = in;
+    bitmap->bitmap = backup;
     hbitmap_free(tmp);
 }
 

blockdev.c

@@ -2033,7 +2033,7 @@ static void block_dirty_bitmap_clear_abort(BlkActionState *common)
                                              common, common);
 
     if (state->backup) {
-        bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
+        bdrv_restore_dirty_bitmap(state->bitmap, state->backup);
     }
 }
 

include/block/block_int.h

@@ -1155,7 +1155,7 @@ bool blk_dev_is_medium_locked(BlockBackend *blk);
 void bdrv_set_dirty(BlockDriverState *bs, int64_t offset, int64_t bytes);
 
 void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out);
-void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in);
+void bdrv_restore_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *backup);
 
 void bdrv_inc_in_flight(BlockDriverState *bs);
 void bdrv_dec_in_flight(BlockDriverState *bs);