Cannot compile

[Cyn7kaL]

I followed the guide, updating the kernel headers and running the rpi-source command, but when I go to make, I get this

make ARCH=arm CROSS_COMPILE= -C /lib/modules/6.1.21-v8+/build M=/home/oreemm/RTL8812BU_for_Raspbian modules
make[1]: Entering directory '/home/oreemm/linux-0afb5e98488aed7017b9bf321b575d0177feb7ed'
CC [M] /home/oreemm/RTL8812BU_for_Raspbian/core/rtw_cmd.o
In file included from ./include/asm-generic/int-ll64.h:11,
from ./arch/arm/include/uapi/asm/types.h:5,
from ./include/uapi/linux/types.h:5,
from ./include/linux/types.h:6,
from /home/oreemm/RTL8812BU_for_Raspbian/include/basic_types.h:75,
from /home/oreemm/RTL8812BU_for_Raspbian/include/drv_types.h:26,
from /home/oreemm/RTL8812BU_for_Raspbian/core/rtw_cmd.c:17:
./include/uapi/asm-generic/int-ll64.h:12:10: fatal error: asm/bitsperlong.h: No such file or directory
12 | #include <asm/bitsperlong.h>
| ^~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [scripts/Makefile.build:250: /home/oreemm/RTL8812BU_for_Raspbian/core/rtw_cmd.o] Error 1
make[1]: *** [Makefile:2012: /home/oreemm/RTL8812BU_for_Raspbian] Error 2
make[1]: Leaving directory '/home/oreemm/linux-0afb5e98488aed7017b9bf321b575d0177feb7ed'
make: *** [Makefile:2284: modules] Error 2