trying to compile uzfs fails on ubuntu 5.15.0-1027-gcp

[shampavman]

I"m trying to comple the code from https://github.com/mayadata-io/cstor
and i already have zfs 2.1.4 running on my ubuntu 20.04.

I got to fixing a whole bunch of MODULE_LICENSE() issues and now stuck with this
root@ubuntu:~/uzfs/cstor/build# make modules -C /usr/src/linux-headers-5.15.0-1027-gcp M=/root/uzfs/cstor/build make: Entering directory '/usr/src/linux-headers-5.15.0-1027-gcp' CC [M] /root/uzfs/cstor/build/conftest.o /root/uzfs/cstor/build/conftest.c:62:56: error: initialization of ‘int (*)(const struct xattr_handler *, struct dentry *, struct inode *, const char *, void *, size_t)’ {aka ‘int (*)(const struct xattr_handler *, struct dentry *, struct inode *, const char *, void *, long unsigned int)’} from incompatible pointer type ‘int (*)(struct inode *, const char *, void *, size_t)’ {aka ‘int (*)(struct inode *, const char *, void *, long unsigned int)’} [-Werror=incompatible-pointer-types] 62 | .get = get, | ^~~ /root/uzfs/cstor/build/conftest.c:62:56: note: (near initialization for ‘xops.get’) cc1: some warnings being treated as errors

i'm not sure, if i should change the function as per 5.15's xattr.h or should i do something else.
Requesting help.
I've attached the complete config.log
config.log

[shampavman]

Ok so i know the reason, its a simple signature mismatch.
The 5.x signature requires get() to be
int get(const struct xattr_handler *handler,struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size

while what is getting pushed is,
int get(struct inode *ip, const char *name, void *buffer, size_t size
But now what i dont understand is, the kernel-xattr-handler.m4 has the correct declaration but that's not getting picked.
attached is the kernel-xattr-handler.m4.

kernel-xattr-handler.m4.txt

Is there something i'm missing in as a flag to configure ?