compile error: static declaration of ‘proc_set_user’ follows non-static declaration and others

Hello,

This is a repost of the following (https://stackoverflow.com/questions/75630436/systemtap-ubuntu-22-04-2-compile-error-static-declaration-of-proc-set-user-fo ) SO question I opened a few days ago; I thought it'd be more fitting here:

I am running Ubuntu 22.04.02 over Linux kernel 5.19.0-32-generic. Systemtap version is 4.6-2.

I have installed systemtap following their Ubuntu tutorial. I took my kernel debug symbols following Ubuntu's wiki tutorial. Since I have SecureBoot enabled, I am "using" a compile server (hosted on my machine, same as the one on which I plan on executing the stap (localhost) ). Running -l "scripts" (e.g.: $ sudo stap -l 'syscall.*' --use-server=localhost) works fine, as only 3 of the 5 passes are needed.

The problem occurs when requesting a very simple probe:$ sudo stap -e 'probe begin {exit()}' --use-server=localhost . At pass 4 (compiling the generated C code), I get various compile errors:

====================================================================================================================================================

In file included from /usr/share/systemtap/runtime/transport/procfs.c:13,
                 from /usr/share/systemtap/runtime/transport/transport.c:72,
                 from /usr/share/systemtap/runtime/linux/print.c:17,
                 from /usr/share/systemtap/runtime/print.c:17,
                 from /usr/share/systemtap/runtime/runtime_context.h:22,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:49:
/usr/share/systemtap/runtime/proc_fs_compatibility.h:29:13: error: static declaration of ‘proc_set_user’ follows non-static declaration
   29 | static void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid)
      | ^~~~~~~~~~~~~
In file included from /usr/share/systemtap/runtime/linux/runtime.h:22,
                 from /usr/share/systemtap/runtime/runtime.h:26,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:21:
./include/linux/proc_fs.h:112:13: note: previous declaration of ‘proc_set_user’ with type ‘void(struct proc_dir_entry *, kuid_t, kgid_t)’
  112 | extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);
      | ^~~~~~~~~~~~~
In file included from /usr/share/systemtap/runtime/transport/procfs.c:13,
                 from /usr/share/systemtap/runtime/transport/transport.c:72,
                 from /usr/share/systemtap/runtime/linux/print.c:17,
                 from /usr/share/systemtap/runtime/print.c:17,
                 from /usr/share/systemtap/runtime/runtime_context.h:22,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:49:
/usr/share/systemtap/runtime/proc_fs_compatibility.h: In function ‘proc_set_user’:
/usr/share/systemtap/runtime/proc_fs_compatibility.h:31:11: error: invalid use of undefined type ‘struct proc_dir_entry’
   31 | de->uid = __kuid_val(uid);
      | ^~
/usr/share/systemtap/runtime/proc_fs_compatibility.h:32:11: error: invalid use of undefined type ‘struct proc_dir_entry’
   32 | de->gid = __kgid_val(gid);
      | ^~
 proc_remove
/usr/share/systemtap/runtime/proc_fs_compatibility.h:47:13: error: static declaration of ‘proc_remove’ follows non-static declaration
   47 | static void proc_remove(struct proc_dir_entry *de)
      | ^~~~~~~~~~~
In file included from /usr/share/systemtap/runtime/linux/runtime.h:22,
                 from /usr/share/systemtap/runtime/runtime.h:26,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:21:
./include/linux/proc_fs.h:124:13: note: previous declaration of ‘proc_remove’ with type ‘void(struct proc_dir_entry *)’
  124 | extern void proc_remove(struct proc_dir_entry *);
      | ^~~~~~~~~~~
In file included from /usr/share/systemtap/runtime/transport/procfs.c:13,
                 from /usr/share/systemtap/runtime/transport/transport.c:72,
                 from /usr/share/systemtap/runtime/linux/print.c:17,
                 from /usr/share/systemtap/runtime/print.c:17,
                 from /usr/share/systemtap/runtime/runtime_context.h:22,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:49:
/usr/share/systemtap/runtime/proc_fs_compatibility.h: In function ‘proc_remove’:
/usr/share/systemtap/runtime/proc_fs_compatibility.h:49:21: error: invalid use of undefined type ‘struct proc_dir_entry’
   49 | if (de && de->subdir == NULL) {
      | ^~
/usr/share/systemtap/runtime/proc_fs_compatibility.h:50:36: error: invalid use of undefined type ‘struct proc_dir_entry’
   50 | if (atomic_read(&de->count) != LAST_ENTRY_COUNT)
      | ^~
In file included from ./include/asm-generic/bug.h:22,
                 from ./arch/x86/include/asm/bug.h:87,
                 from ./include/linux/bug.h:5,
                 from ./include/linux/mmdebug.h:5,
                 from ./include/linux/gfp.h:5,
                 from /usr/share/systemtap/runtime/linux/runtime_defines.h:20,
                 from /usr/share/systemtap/runtime/runtime_defines.h:8,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:12:
/usr/share/systemtap/runtime/proc_fs_compatibility.h:54:34: error: invalid use of undefined type ‘struct proc_dir_entry’
   54 | de->name);
      | ^~
./include/linux/printk.h:436:33: note: in definition of macro ‘printk_index_wrap’
  436 | _p_func(_fmt, ##__VA_ARGS__); \
      | ^~~~~~~~~~~
/usr/share/systemtap/runtime/proc_fs_compatibility.h:51:25: note: in expansion of macro ‘printk’
   51 | printk(KERN_ERR "Removal of %s from /proc"
      | ^~~~~~
In file included from /usr/share/systemtap/runtime/transport/procfs.c:13,
                 from /usr/share/systemtap/runtime/transport/transport.c:72,
                 from /usr/share/systemtap/runtime/linux/print.c:17,
                 from /usr/share/systemtap/runtime/print.c:17,
                 from /usr/share/systemtap/runtime/runtime_context.h:22,
                 from <server>/stap000000/stap_44621a3e20f38e1a82b1cb20ff27737b_949_src.c:49:
/usr/share/systemtap/runtime/proc_fs_compatibility.h:55:37: error: invalid use of undefined type ‘struct proc_dir_entry’
   55 | remove_proc_entry(de->name, de->parent);
      | ^~
/usr/share/systemtap/runtime/proc_fs_compatibility.h:55:47: error: invalid use of undefined type ‘struct proc_dir_entry’
   55 | remove_proc_entry(de->name, de->parent);
      | ^~

====================================================================================================================================================

The full error log, as well as more information, can be found in the output of running stap-report, hosted here: https://pastebin.com/vPRXMHzv
A warning that might be of importance in the file (though I doubt it) is :

warning: the compiler differs from the one used to build the kernel
  The kernel was built by: x86_64-linux-gnu-gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
  You are using: gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0

Given I have started my server with -B "-e CC=/usr/bin/x86_64-linux-gnu-gcc", I don't exactly know how to fix the warning without changing my whole system's CC environment variable.

Would anyone know what causes the problem, or how to solve it?

Thanks in advance!