* Re: [PATCH bpf-next v2 6/6] bpf: implement "jmp" mode for trampoline
[not found] <20251117034906.32036-7-dongml2@chinatelecom.cn>
@ 2025-11-17 22:49 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-11-17 22:49 UTC (permalink / raw)
To: Menglong Dong, ast, rostedt
Cc: llvm, oe-kbuild-all, daniel, john.fastabend, andrii, martin.lau,
eddyz87, song, yonghong.song, kpsingh, sdf, haoluo, jolsa,
mhiramat, mark.rutland, mathieu.desnoyers, jiang.biao, bpf,
linux-kernel, linux-trace-kernel
Hi Menglong,
kernel test robot noticed the following build errors:
[auto build test ERROR on bpf-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Menglong-Dong/ftrace-introduce-FTRACE_OPS_FL_JMP/20251117-115243
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link: https://lore.kernel.org/r/20251117034906.32036-7-dongml2%40chinatelecom.cn
patch subject: [PATCH bpf-next v2 6/6] bpf: implement "jmp" mode for trampoline
config: arm64-randconfig-002-20251118 (https://download.01.org/0day-ci/archive/20251118/202511180613.Om7k1nP1-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 0bba1e76581bad04e7d7f09f5115ae5e2989e0d9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251118/202511180613.Om7k1nP1-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511180613.Om7k1nP1-lkp@intel.com/
All errors (new ones prefixed by >>):
kernel/bpf/trampoline.c:500:11: error: incomplete definition of type 'struct ftrace_ops'
500 | tr->fops->flags |= FTRACE_OPS_FL_JMP;
| ~~~~~~~~^
include/linux/ftrace.h:40:8: note: forward declaration of 'struct ftrace_ops'
40 | struct ftrace_ops;
| ^
>> kernel/bpf/trampoline.c:500:22: error: use of undeclared identifier 'FTRACE_OPS_FL_JMP'
500 | tr->fops->flags |= FTRACE_OPS_FL_JMP;
| ^~~~~~~~~~~~~~~~~
kernel/bpf/trampoline.c:502:11: error: incomplete definition of type 'struct ftrace_ops'
502 | tr->fops->flags &= ~FTRACE_OPS_FL_JMP;
| ~~~~~~~~^
include/linux/ftrace.h:40:8: note: forward declaration of 'struct ftrace_ops'
40 | struct ftrace_ops;
| ^
kernel/bpf/trampoline.c:502:23: error: use of undeclared identifier 'FTRACE_OPS_FL_JMP'
502 | tr->fops->flags &= ~FTRACE_OPS_FL_JMP;
| ^~~~~~~~~~~~~~~~~
kernel/bpf/trampoline.c:534:12: error: incomplete definition of type 'struct ftrace_ops'
534 | tr->fops->flags |= FTRACE_OPS_FL_JMP;
| ~~~~~~~~^
include/linux/ftrace.h:40:8: note: forward declaration of 'struct ftrace_ops'
40 | struct ftrace_ops;
| ^
kernel/bpf/trampoline.c:534:23: error: use of undeclared identifier 'FTRACE_OPS_FL_JMP'
534 | tr->fops->flags |= FTRACE_OPS_FL_JMP;
| ^~~~~~~~~~~~~~~~~
kernel/bpf/trampoline.c:536:12: error: incomplete definition of type 'struct ftrace_ops'
536 | tr->fops->flags &= ~FTRACE_OPS_FL_JMP;
| ~~~~~~~~^
include/linux/ftrace.h:40:8: note: forward declaration of 'struct ftrace_ops'
40 | struct ftrace_ops;
| ^
kernel/bpf/trampoline.c:536:24: error: use of undeclared identifier 'FTRACE_OPS_FL_JMP'
536 | tr->fops->flags &= ~FTRACE_OPS_FL_JMP;
| ^~~~~~~~~~~~~~~~~
8 errors generated.
vim +/FTRACE_OPS_FL_JMP +500 kernel/bpf/trampoline.c
470
471 size = arch_bpf_trampoline_size(&tr->func.model, tr->flags,
472 tlinks, tr->func.addr);
473 if (size < 0) {
474 err = size;
475 goto out;
476 }
477
478 if (size > PAGE_SIZE) {
479 err = -E2BIG;
480 goto out;
481 }
482
483 im = bpf_tramp_image_alloc(tr->key, size);
484 if (IS_ERR(im)) {
485 err = PTR_ERR(im);
486 goto out;
487 }
488
489 err = arch_prepare_bpf_trampoline(im, im->image, im->image + size,
490 &tr->func.model, tr->flags, tlinks,
491 tr->func.addr);
492 if (err < 0)
493 goto out_free;
494
495 err = arch_protect_bpf_trampoline(im->image, im->size);
496 if (err)
497 goto out_free;
498
499 if (bpf_trampoline_use_jmp(tr->flags))
> 500 tr->fops->flags |= FTRACE_OPS_FL_JMP;
501 else
502 tr->fops->flags &= ~FTRACE_OPS_FL_JMP;
503
504 WARN_ON(tr->cur_image && total == 0);
505 if (tr->cur_image)
506 /* progs already running at this address */
507 err = modify_fentry(tr, orig_flags, tr->cur_image->image,
508 im->image, lock_direct_mutex);
509 else
510 /* first time registering */
511 err = register_fentry(tr, im->image);
512
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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