diff --git a/Marlin/ubl_G29.cpp b/Marlin/ubl_G29.cpp
index e9f97b4ad..024ff759b 100644
--- a/Marlin/ubl_G29.cpp
+++ b/Marlin/ubl_G29.cpp
@@ -1533,21 +1533,6 @@
 
   typedef struct { uint8_t sx, ex, sy, ey; bool yfirst; } smart_fill_info;
 
-  void smart_fill_loop(const smart_fill_info &f) {
-    if (f.yfirst) {
-      const int8_t dir = f.ex > f.sx ? 1 : -1;
-      for (uint8_t y = f.sy; y != f.ey; ++y)
-        for (uint8_t x = f.sx; x != f.ex; x += dir)
-          if (smart_fill_one(x, y, dir, 0)) break;
-    }
-    else {
-      const int8_t dir = f.ey > f.sy ? 1 : -1;
-       for (uint8_t x = f.sx; x != f.ex; ++x)
-        for (uint8_t y = f.sy; y != f.ey; y += dir)
-          if (smart_fill_one(x, y, 0, dir)) break;
-    }
-  }
-
   void smart_fill_mesh() {
     const smart_fill_info info[] = {
       { 0, GRID_MAX_POINTS_X,      0, GRID_MAX_POINTS_Y - 2,  false },  // Bottom of the mesh looking up
@@ -1555,7 +1540,21 @@
       { 0, GRID_MAX_POINTS_X - 2,  0, GRID_MAX_POINTS_Y,      true  },  // Left side of the mesh looking right
       { GRID_MAX_POINTS_X - 1, 0,  0, GRID_MAX_POINTS_Y,      true  }   // Right side of the mesh looking left
     };
-    for (uint8_t i = 0; i < COUNT(info); ++i) smart_fill_loop(info[i]);
+    for (uint8_t i = 0; i < COUNT(info); ++i) {
+      const smart_fill_info &f = info[i];
+      if (f.yfirst) {
+        const int8_t dir = f.ex > f.sx ? 1 : -1;
+        for (uint8_t y = f.sy; y != f.ey; ++y)
+          for (uint8_t x = f.sx; x != f.ex; x += dir)
+            if (smart_fill_one(x, y, dir, 0)) break;
+      }
+      else {
+        const int8_t dir = f.ey > f.sy ? 1 : -1;
+         for (uint8_t x = f.sx; x != f.ex; ++x)
+          for (uint8_t y = f.sy; y != f.ey; y += dir)
+            if (smart_fill_one(x, y, 0, dir)) break;
+      }
+    }
   }
 
   void unified_bed_leveling::tilt_mesh_based_on_probed_grid(const bool do_ubl_mesh_map) {