Re: possible deadlock in trie_delete_elem

From: kernel test robot
Date: Thu Jun 06 2024 - 17:06:59 EST

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In reply to: kernel test robot: "Re: possible deadlock in trie_delete_elem"
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Hi syzbot,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/master]
[also build test ERROR on bpf/master linus/master v6.10-rc2 next-20240606]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/syzbot/possible-deadlock-in-trie_delete_elem/20240606-230435
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link: https://lore.kernel.org/r/000000000000277099061a394d13%40google.com
patch subject: possible deadlock in trie_delete_elem
config: s390-defconfig (https://download.01.org/0day-ci/archive/20240607/202406070456.Ke0WsZ9X-lkp@xxxxxxxxx/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project d7d2d4f53fc79b4b58e8d8d08151b577c3699d4a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240607/202406070456.Ke0WsZ9X-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406070456.Ke0WsZ9X-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

In file included from kernel/tracepoint.c:5:
In file included from include/linux/module.h:19:
In file included from include/linux/elf.h:6:
In file included from arch/s390/include/asm/elf.h:173:
In file included from arch/s390/include/asm/mmu_context.h:11:
In file included from arch/s390/include/asm/pgalloc.h:18:
In file included from include/linux/mm.h:2253:
include/linux/vmstat.h:500:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
500 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
501 | item];
| ~~~~
include/linux/vmstat.h:507:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
507 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
508 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
include/linux/vmstat.h:519:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
519 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
520 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:528:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
528 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
529 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:318:9: note: expanded from macro '__pcpu_size_call_return'
318 | typeof(variable) pscr_ret__; \
| ^~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:319:22: note: expanded from macro '__pcpu_size_call_return'
319 | __verify_pcpu_ptr(&(variable)); \
| ^~~~~~~~
include/linux/percpu-defs.h:219:47: note: expanded from macro '__verify_pcpu_ptr'
219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:320:16: note: expanded from macro '__pcpu_size_call_return'
320 | switch(sizeof(variable)) { \
| ^~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
include/asm-generic/percpu.h:144:9: note: expanded from macro 'this_cpu_generic_read'
144 | typeof(pcp) __ret; \
| ^~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
include/asm-generic/percpu.h:145:20: note: expanded from macro 'this_cpu_generic_read'
145 | if (__native_word(pcp)) \
| ^~~
include/linux/compiler_types.h:454:10: note: expanded from macro '__native_word'
454 | (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
| ^
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
include/asm-generic/percpu.h:145:20: note: expanded from macro 'this_cpu_generic_read'
145 | if (__native_word(pcp)) \
| ^~~
include/linux/compiler_types.h:454:39: note: expanded from macro '__native_word'
454 | (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
| ^
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
include/asm-generic/percpu.h:145:20: note: expanded from macro 'this_cpu_generic_read'
145 | if (__native_word(pcp)) \
| ^~~
include/linux/compiler_types.h:455:10: note: expanded from macro '__native_word'
455 | sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
| ^
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
include/asm-generic/percpu.h:145:20: note: expanded from macro 'this_cpu_generic_read'
145 | if (__native_word(pcp)) \
| ^~~
include/linux/compiler_types.h:455:38: note: expanded from macro '__native_word'
455 | sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
| ^
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
include/asm-generic/percpu.h:146:45: note: expanded from macro 'this_cpu_generic_read'
146 | __ret = __this_cpu_generic_read_nopreempt(pcp); \
| ^~~
include/asm-generic/percpu.h:125:9: note: expanded from macro '__this_cpu_generic_read_nopreempt'
125 | typeof(pcp) ___ret; \
| ^~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:16: error: indirection requires pointer operand ('void' invalid)
178 | int active = this_cpu_read(*(link->link.prog->active));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:489:29: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:321:23: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~~~~~~~~~~
<scratch space>:68:1: note: expanded from here
68 | this_cpu_read_1
| ^
note: (skipping 6 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
>> kernel/tracepoint.c:178:36: error: incomplete definition of type 'struct bpf_raw_tp_link'
178 | int active = this_cpu_read(*(link->link.prog->active));
| ~~~~^
include/linux/percpu-defs.h:489:69: note: expanded from macro 'this_cpu_read'
489 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~
include/linux/percpu-defs.h:321:31: note: expanded from macro '__pcpu_size_call_return'
321 | case 1: pscr_ret__ = stem##1(variable); break; \
| ^~~~~~~~
include/asm-generic/percpu.h:375:53: note: expanded from macro 'this_cpu_read_1'
375 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
| ^~~
note: (skipping 9 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:487:22: note: expanded from macro 'compiletime_assert'
487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:475:23: note: expanded from macro '_compiletime_assert'
475 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:467:9: note: expanded from macro '__compiletime_assert'
467 | if (!(condition)) \
| ^~~~~~~~~
kernel/tracepoint.c:171:9: note: forward declaration of 'struct bpf_raw_tp_link'
171 | struct bpf_raw_tp_link *link;
| ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
5 warnings and 20 errors generated.

vim +178 kernel/tracepoint.c

167
168 static void debug_print_probes(struct tracepoint_func *funcs)
169 {
170 int i;
171 struct bpf_raw_tp_link *link;
172
173 if (!tracepoint_debug || !funcs)
174 return;
175
176 for (i = 0; funcs[i].func; i++) {
177 link = funcs[i].data;
> 178 int active = this_cpu_read(*(link->link.prog->active));
179 printk("Probe %d : %p / %p: %s/%d / %i\n", i,
180 funcs[i].func,
181 link,
182 link->link.prog->aux->name,
183 active,
184 funcs[i].prio);
185 }
186 }
187

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