Move cmd640_lock outside the CONFIG_BLK_DEV_CMD640_ENHANCED

test, since it is needed regardless.

drivers/ide/cmd640.c

@@ -164,6 +164,12 @@ int cmd640_vlb = 0;
 #define DRWTIM23	0x58
 #define BRST		0x59
 
+/*
+ * Protects register file access from overlapping on primary and secondary
+ * channel, since those share hardware resources.
+ */
+static spinlock_t cmd640_lock __cacheline_aligned = SPIN_LOCK_UNLOCKED;
+
 /*
  * Registers and masks for easy access by drive index:
  */
@@ -172,12 +178,6 @@ static u8 prefetch_masks[4] = {CNTRL_DIS_RA0, CNTRL_DIS_RA1, ARTTIM23_DIS_RA2, A
 
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
 
-/*
- * Protects register file access from overlapping on primary and secondary
- * channel, since those share hardware resources.
- */
-static spinlock_t cmd640_lock __cacheline_aligned = SPIN_LOCK_UNLOCKED;
-
 static u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
 static u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM23, DRWTIM23};