build error

[Osmanyasal]

make
[ 9%] Generating kernel_module/driver/x86_adapt_driver.ko
warning: the compiler differs from the one used to build the kernel
The kernel was built by: x86_64-linux-gnu-gcc-12 (Ubuntu 12.3.0-1ubuntu122.04) 12.3.0
You are using: gcc-12 (Ubuntu 12.3.0-1ubuntu122.04) 12.3.0
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c: In function ‘get_current_task_cpu’:
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:702:19: error: ‘struct task_struct’ has no member named ‘cpu’
702 | return current->cpu;
| ^~
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c: In function ‘x86_adapt_init’:
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:1553:5: error: implicit declaration of function ‘get_online_cpus’; did you mean ‘get_online_mems’? [-Werror=implicit-function-declaration]
1553 | get_online_cpus();
| ^~~~~~~~~~~~~~~
| get_online_mems
In file included from ./include/linux/linkage.h:7,
from ./arch/x86/include/asm/cache.h:5,
from ./include/linux/cache.h:6,
from ./include/linux/time.h:5,
from ./include/linux/stat.h:19,
from ./include/linux/module.h:13,
from /home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:2:
./include/linux/export.h:29:22: error: passing argument 1 of ‘class_create’ from incompatible pointer type [-Werror=incompatible-pointer-types]
29 | #define THIS_MODULE (&__this_module)
| ~^~~~~~~~~~~~~~~
| |
| struct module *
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:1562:41: note: in expansion of macro ‘THIS_MODULE’
1562 | if ((x86_adapt_class = class_create(THIS_MODULE, "x86_adapt")) == NULL) {
| ^~~~~~~~~~~
In file included from ./include/linux/device.h:31,
from ./include/linux/cdev.h:8,
from /home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:4:
./include/linux/device/class.h:230:54: note: expected ‘const char *’ but argument is of type ‘struct module *’
230 | struct class * __must_check class_create(const char *name);
| ~~~~~~~~~~~~^~~~
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:1562:28: error: too many arguments to function ‘class_create’
1562 | if ((x86_adapt_class = class_create(THIS_MODULE, "x86_adapt")) == NULL) {
| ^~~~~~~~~~~~
./include/linux/device/class.h:230:29: note: declared here
230 | struct class * __must_check class_create(const char name);
| ^~~~~~~~~~~~
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:1567:30: error: assignment to ‘char * ()(const struct device *, umode_t )’ {aka ‘char * ()(const struct device *, short unsigned int )’} from incompatible pointer type ‘char * ()(struct device *, umode_t )’ {aka ‘char * ()(struct device *, short unsigned int *)’} [-Werror=incompatible-pointer-types]
1567 | x86_adapt_class->devnode = x86_adapt_devnode;
| ^
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:1632:5: error: implicit declaration of function ‘put_online_cpus’; did you mean ‘num_online_cpus’? [-Werror=implicit-function-declaration]
1632 | put_online_cpus();
| ^~~~~~~~~~~~~~~
| num_online_cpus
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c: In function ‘get_current_task_cpu’:
/home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.c:707:1: error: control reaches end of non-void function [-Werror=return-type]
707 | }
| ^
cc1: some warnings being treated as errors
make[6]: *** [scripts/Makefile.build:251: /home/rt7/Desktop/x86_adapt/build/kernel_module/driver/x86_adapt_driver.o] Error 1
make[5]: *** [scripts/Makefile.build:488: /home/rt7/Desktop/x86_adapt/build/kernel_module/driver] Error 2
make[4]: *** [/usr/src/linux-headers-6.5.0-28-generic/Makefile:2039: /home/rt7/Desktop/x86_adapt/build/kernel_module] Error 2
make[3]: *** [Makefile:234: __sub-make] Error 2
make[2]: *** [CMakeFiles/x86_adapt_driver.dir/build.make:76: kernel_module/driver/x86_adapt_driver.ko] Error 2
make[1]: *** [CMakeFiles/Makefile2:90: CMakeFiles/x86_adapt_driver.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

[cvonelm]

The interface to class_create changed to `class_create(const char *name); in Linux 6.4, resulting in this build error.