Installation of kernel module anbox-binder failed with compilation error on RHEL 8.3

[mack-w]

Failed to install module anbox-binder because of a compilation error. The log message is provided below:

DKMS make.log for anbox-binder-1 for kernel 4.18.0-240.8.1.el8_3.x86_64 (x86_64)  
2020年 12月 19日 星期六 00:47:15 CST  
make -C /lib/modules/4.18.0-240.8.1.el8_3.x86_64/build V=0 M=$PWD  
make[1]: 进入目录“/usr/src/kernels/4.18.0-240.8.1.el8_3.x86_64”  
  CC [M]  /var/lib/dkms/anbox-binder/1/build/deps.o  
  CC [M]  /var/lib/dkms/anbox-binder/1/build/binder.o  
/var/lib/dkms/anbox-binder/1/build/binder.c:3408:11: 错误：initialization of ‘vm_fault_t (*)(struct vm_fault *)’ {或称 ‘unsigned int (*)(struct vm_fault *)’} from incompatible pointer type ‘int (*)(struct vm_fault *)’ [-Werror=incompatible-pointer-types]  
  .fault = binder_vm_fault,  
           ^~~~~~~~~~~~~~~  
/var/lib/dkms/anbox-binder/1/build/binder.c:3408:11: 附注：(在‘binder_vm_ops.fault’的初始化附近)  
cc1：有些警告被当作是错误  
make[2]: *** [scripts/Makefile.build:315：/var/lib/dkms/anbox-binder/1/build/binder.o] 错误 1  
make[1]: *** [Makefile:1544：_module_/var/lib/dkms/anbox-binder/1/build] 错误 2  
make[1]: 离开目录“/usr/src/kernels/4.18.0-240.8.1.el8_3.x86_64”  
make: *** [Makefile:8：all] 错误 2  

It seems that the compiler flag -Werror was enabled, but I didn't find it in the makefile.
uname -a: Linux ThinkPad-P15v-Gen1 4.18.0-240.8.1.el8_3.x86_64 #1 SMP Fri Dec 4 12:24:03 EST 2020 x86_64 x86_64 x86_64 GNU/Linux

[mack-w]

A fix was found in one of the open pull requests.

[aibeke]

A fix was found in one of the open pull requests.

Hello. I have same error. If you remember about this problem yet can you give the cue?