From fca60335e145ec6a1cbb154ef22a754e610faa86 Mon Sep 17 00:00:00 2001
From: Andrew <18502096+classicrocker883@users.noreply.github.com>
Date: Tue, 3 Jun 2025 20:54:22 -0400
Subject: [PATCH] =?UTF-8?q?=F0=9F=A9=B9=20Fix=20Nonlinear=20Extrusion=20bu?=
 =?UTF-8?q?ild=20(#27906)?=
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Fixes #27902
---
 Marlin/src/core/boards.h             | 4 ++--
 Marlin/src/module/stepper.h          | 5 ++---
 buildroot/tests/STM32F103RE_creality | 2 +-
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/Marlin/src/core/boards.h b/Marlin/src/core/boards.h
index 32ee85daab..adc03b657c 100644
--- a/Marlin/src/core/boards.h
+++ b/Marlin/src/core/boards.h
@@ -275,7 +275,7 @@
 #define BOARD_MKS_SGEN_L_V2           2509  // MKS SGEN_L V2
 #define BOARD_BTT_SKR_E3_TURBO        2510  // BigTreeTech SKR E3 Turbo
 #define BOARD_FLY_CDY                 2511  // FLYmaker FLY CDY
-#define BOARD_XTLW_CLIMBER_8TH_LPC    2512  // XTLW_CLIMBER_8TH_LPC
+#define BOARD_XTLW_CLIMBER_8TH_LPC    2512  // XTLW Climber 8
 
 //
 // SAM3X8E ARM Cortex-M3
@@ -283,7 +283,7 @@
 
 #define BOARD_DUE3DOM                 3000  // DUE3DOM for Arduino DUE
 #define BOARD_DUE3DOM_MINI            3001  // DUE3DOM MINI for Arduino DUE
-#define BOARD_RADDS                   3002  // RADDS
+#define BOARD_RADDS                   3002  // RADDS v1.5/v1.6
 #define BOARD_RAMPS_FD_V1             3003  // RAMPS-FD v1
 #define BOARD_RAMPS_FD_V2             3004  // RAMPS-FD v2
 #define BOARD_RAMPS_SMART_EFB         3005  // RAMPS-SMART (Power outputs: Hotend, Fan, Bed)
diff --git a/Marlin/src/module/stepper.h b/Marlin/src/module/stepper.h
index 90cbedc9fc..3083ad2973 100644
--- a/Marlin/src/module/stepper.h
+++ b/Marlin/src/module/stepper.h
@@ -311,9 +311,8 @@ constexpr ena_mask_t enable_overlap[] = {
       struct { int32_t A, B, C; } q30;
     };
     #if NONLINEAR_EXTRUSION_Q24
-      protected:
-        int32_t edividend;
-        uint32_t scale_q24;
+      int32_t edividend;
+      uint32_t scale_q24;
     #endif
   } nonlinear_t;
 
diff --git a/buildroot/tests/STM32F103RE_creality b/buildroot/tests/STM32F103RE_creality
index 0855a71ee4..45821598e0 100755
--- a/buildroot/tests/STM32F103RE_creality
+++ b/buildroot/tests/STM32F103RE_creality
@@ -32,7 +32,7 @@ opt_enable DWIN_LCD_PROUI INDIVIDUAL_AXIS_HOMING_SUBMENU PID_AUTOTUNE_MENU PID_E
            SOUND_MENU_ITEM PRINTCOUNTER NOZZLE_PARK_FEATURE ADVANCED_PAUSE_FEATURE FILAMENT_RUNOUT_SENSOR \
            BLTOUCH Z_SAFE_HOMING AUTO_BED_LEVELING_UBL MESH_EDIT_MENU LCD_BED_TRAMMING LIN_ADVANCE \
            LIMITED_MAX_FR_EDITING LIMITED_MAX_ACCEL_EDITING LIMITED_JERK_EDITING BAUD_RATE_GCODE \
-           CASE_LIGHT_ENABLE CASE_LIGHT_MENU CASE_LIGHT_NO_BRIGHTNESS
+           CASE_LIGHT_ENABLE CASE_LIGHT_MENU CASE_LIGHT_NO_BRIGHTNESS NONLINEAR_EXTRUSION
 opt_set PREHEAT_3_LABEL '"CUSTOM"' PREHEAT_3_TEMP_HOTEND 240 PREHEAT_3_TEMP_BED 60 PREHEAT_3_FAN_SPEED 128 BOOTSCREEN_TIMEOUT 1100 CASE_LIGHT_PIN 4
 exec_test $1 $2 "Ender-3 S1 - ProUI (PIDTEMP)" "$3"