root@LinuxCNC:/usr/src/Beckhoff/BBAPI# make && make install
make -C /lib/modules/5.10.0-5-rt-amd64/build M=/usr/src/Beckhoff/BBAPI modules
make[1]: Entering directory '/usr/src/linux-headers-5.10.0-5-rt-amd64'
  CC [M]  /usr/src/Beckhoff/BBAPI/api.o
/usr/src/Beckhoff/BBAPI/api.c: In function ‘bbapi_copy_bios’:
/usr/src/Beckhoff/BBAPI/api.c:181:18: error: too many arguments to function ‘__vmalloc’
  181 |  bbapi->memory = __vmalloc(size, GFP_KERNEL, PAGE_KERNEL_EXEC);
      |                  ^~~~~~~~~
In file included from /usr/src/Beckhoff/BBAPI/api.c:18:
/usr/src/linux-headers-5.10.0-5-common-rt/include/linux/vmalloc.h:107:14: note: declared here
  107 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask);
      |              ^~~~~~~~~
/usr/src/Beckhoff/BBAPI/api.c: In function ‘bbapi_find_bios’:
/usr/src/Beckhoff/BBAPI/api.c:208:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
  208 |  uint8_t __iomem *const start = ioremap(BBIOSAPI_SIGNATURE_PHYS_START_ADDR,
      |  ^~~~~~~
make[3]: *** [/usr/src/linux-headers-5.10.0-5-common-rt/scripts/Makefile.build:291: /usr/src/Beckhoff/BBAPI/api.o] Error 1
make[2]: *** [/usr/src/linux-headers-5.10.0-5-common-rt/Makefile:1819: /usr/src/Beckhoff/BBAPI] Error 2
make[1]: *** [/usr/src/linux-headers-5.10.0-5-common-rt/Makefile:185: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.10.0-5-rt-amd64'
make: *** [Makefile:16: all] Error 2
root@LinuxCNC:/usr/src/Beckhoff/BBAPI#