Attempting to build on Trixie with older headers

battery/Makefile

@@ -1,4 +1,6 @@
+
 obj-m += oneUpPower.o
+#obj-m += test_power.o
 
 # Build with:
 #   make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

battery/build

@@ -1,5 +1,6 @@
 #!/usr/bin/bash
 
-make -C /lib/modules/$(uname -r)/build M=$PWD clean
-make -C /lib/modules/$(uname -r)/build M=$PWD modules
+HEADERS=6.12.47+rpt-rpi-v8
+make -C /lib/modules/$HEADERS/build M=$PWD clean
+make -C /lib/modules/$HEADERS/build M=$PWD modules
 

battery/install

@@ -1,4 +1,4 @@
-sudo insmod test_power.ko
+sudo insmod oneUpPower.ko
 
 ls -l /sys/class/power_supply/BAT0
 cat /sys/class/power_supply/BAT0/uevent

battery/oneUpPower.c

@@ -136,7 +136,7 @@ static int get_battery_property(struct power_supply *psy,
 	    return get_battery_propertiesInts( psy, psp, val );
     }
 
-    return 0
+    return 0;
 }
 
 static enum power_supply_property test_power_ac_props[] = {