can not compile ashmem to linux kernel 6.18.4

[bronze1man]

which linux kernel version I should try? I will try different linux kernel version later.

make -C /lib/modules/$(uname -r)/build M=$PWD LLVM=1 modules
make: Entering directory '/usr/src/linux-headers-6.18.4-x64v3-xanmod1'
make[1]: Entering directory '/opt/kernel/redroid-modules/ashmem'
warning: the compiler differs from the one used to build the kernel
  The kernel was built by: Debian clang version 19.1.7 (3)
  You are using:           Debian clang version 19.1.7 (3~deb12u1)
  CC [M]  ashmem.o
ashmem.c:376:22: error: no member named 'get_unmapped_area' in 'struct mm_struct'
  376 |         return current->mm->get_unmapped_area(file, addr, len, pgoff, flags);
      |                ~~~~~~~~~~~  ^
ashmem.c:405:16: error: cannot assign to non-static data member 'vm_flags' with const-qualified type 'const vm_flags_t' (aka 'const unsigned long')
  405 |         vma->vm_flags &= ~calc_vm_may_flags(~asma->prot_mask);
      |         ~~~~~~~~~~~~~ ^
/usr/src/linux-headers-6.18.4-x64v3-xanmod1/include/linux/mm_types.h:837:20: note: non-static data member 'vm_flags' declared const here
  837 |                 const vm_flags_t vm_flags;
      |                 ~~~~~~~~~~~~~~~~~^~~~~~~~
ashmem.c:950:8: error: call to undeclared function 'register_shrinker'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  950 |         ret = register_shrinker(&ashmem_shrinker);
      |               ^
ashmem.c:950:8: note: did you mean 'register_chrdev'?
/usr/src/linux-headers-6.18.4-x64v3-xanmod1/include/linux/fs.h:2997:19: note: 'register_chrdev' declared here
 2997 | static inline int register_chrdev(unsigned int major, const char *name,
      |                   ^
ashmem.c:973:2: error: call to undeclared function 'unregister_shrinker'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  973 |         unregister_shrinker(&ashmem_shrinker);
      |         ^
ashmem.c:973:2: note: did you mean 'unregister_chrdev'?
/usr/src/linux-headers-6.18.4-x64v3-xanmod1/include/linux/fs.h:3003:20: note: 'unregister_chrdev' declared here
 3003 | static inline void unregister_chrdev(unsigned int major, const char *name)
      |                    ^
4 errors generated.
make[3]: *** [/usr/src/linux-headers-6.18.4-x64v3-xanmod1/scripts/Makefile.build:287: ashmem.o] Error 1
make[2]: *** [/usr/src/linux-headers-6.18.4-x64v3-xanmod1/Makefile:2015: .] Error 2
make[1]: *** [/usr/src/linux-headers-6.18.4-x64v3-xanmod1/Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/opt/kernel/redroid-modules/ashmem'
make: *** [Makefile:248: __sub-make] Error 2
make: Leaving directory '/usr/src/linux-headers-6.18.4-x64v3-xanmod1'