el10 x86_64 # uname -r
6.10.0-15.el10.x86_64
el10 x86_64 # stap -e 'probe nfsd.proc.lookup {printf("%s %s\n", client_ip, filename);}'
In file included from /usr/share/systemtap/runtime/runtime.h:26,
                 from /tmp/staphWrjL0/stap_43f6aea024d9a47d3e37cbda87af21c3_9499_src.c:21:
/usr/share/systemtap/runtime/stp_task_work.c: In function ‘stp_task_work_cancel’:
/usr/share/systemtap/runtime/stp_task_work.c:13:123: error: passing argument 2 of ‘(bool (*)(struct task_struct *, struct callback_head *))kallsyms_task_work_cancel’ from incompatible pointer type [-Wincompatible-pointer-types]
   13 | #define task_work_cancel(a,b) ibt_wrapper(struct callback_head *, (* (task_work_cancel_fn)kallsyms_task_work_cancel)((a), (b)))
      |                                                                                                                           ^~~
      |                                                                                                                           |
      |                                                                                                                           task_work_func_t {aka void (*)(struct callback_head *)}
/usr/share/systemtap/runtime/linux/runtime.h:317:21: note: in definition of macro ‘ibt_wrapper’
  317 |   rettype retval = (function);                  \
      |                     ^~~~~~~~
/usr/share/systemtap/runtime/stp_task_work.c:107:17: note: in expansion of macro ‘task_work_cancel’
  107 |         twork = task_work_cancel(task, func);
      |                 ^~~~~~~~~~~~~~~~
/usr/share/systemtap/runtime/stp_task_work.c:13:123: note: expected ‘struct callback_head *’ but argument is of type ‘task_work_func_t’ {aka ‘void (*)(struct callback_head *)’}
   13 | #define task_work_cancel(a,b) ibt_wrapper(struct callback_head *, (* (task_work_cancel_fn)kallsyms_task_work_cancel)((a), (b)))
      |                                                                                                                           ^~~
/usr/share/systemtap/runtime/linux/runtime.h:317:21: note: in definition of macro ‘ibt_wrapper’
  317 |   rettype retval = (function);                  \
      |                     ^~~~~~~~
/usr/share/systemtap/runtime/stp_task_work.c:107:17: note: in expansion of macro ‘task_work_cancel’
  107 |         twork = task_work_cancel(task, func);
      |                 ^~~~~~~~~~~~~~~~
/usr/share/systemtap/runtime/linux/runtime.h:317:20: error: incompatible types when initializing type ‘struct callback_head *’ using type ‘bool’ {aka ‘_Bool’}
  317 |   rettype retval = (function);                  \
      |                    ^
/usr/share/systemtap/runtime/stp_task_work.c:13:31: note: in expansion of macro ‘ibt_wrapper’
   13 | #define task_work_cancel(a,b) ibt_wrapper(struct callback_head *, (* (task_work_cancel_fn)kallsyms_task_work_cancel)((a), (b)))
      |                               ^~~~~~~~~~~
/usr/share/systemtap/runtime/stp_task_work.c:107:17: note: in expansion of macro ‘task_work_cancel’
  107 |         twork = task_work_cancel(task, func);
      |                 ^~~~~~~~~~~~~~~~
make[1]: *** [scripts/Makefile.build:244: /tmp/staphWrjL0/stap_43f6aea024d9a47d3e37cbda87af21c3_9499_src.o] Error 1
make: *** [Makefile:1952: /tmp/staphWrjL0] Error 2
WARNING: kbuild exited with status: 2
Pass 4: compilation failed.  [man error::pass4]
Kernel version 6.10.0 is outside tested range 2.6.32 ... 6.9-rc0
el10 x86_64 #