Re: [PATCH bpf-next v3 2/3] bpf, riscv: add fsession support for trampolines

From: kernel test robot <lkp@intel.com>
To: Menglong Dong <menglong8.dong@gmail.com>,
	ast@kernel.org, bjorn@kernel.org
Cc: oe-kbuild-all@lists.linux.dev, daniel@iogearbox.net,
	andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com,
	song@kernel.org, yonghong.song@linux.dev,
	john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me,
	haoluo@google.com, jolsa@kernel.org, pulehui@huawei.com,
	puranjay@kernel.org, pjw@kernel.org, palmer@dabbelt.com,
	aou@eecs.berkeley.edu, alex@ghiti.fr, bpf@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	jiang.biao@linux.dev
Subject: Re: [PATCH bpf-next v3 2/3] bpf, riscv: add fsession support for trampolines
Date: Sat, 7 Feb 2026 05:47:52 +0800	[thread overview]
Message-ID: <202602070533.NAsdK5m6-lkp@intel.com> (raw)
In-Reply-To: <20260206122002.1494125-3-dongml2@chinatelecom.cn>

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/bpf-riscv-introduce-emit_store_stack_imm64-for-trampoline/20260206-202356
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20260206122002.1494125-3-dongml2%40chinatelecom.cn
patch subject: [PATCH bpf-next v3 2/3] bpf, riscv: add fsession support for trampolines
config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20260207/202602070533.NAsdK5m6-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260207/202602070533.NAsdK5m6-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/202602070533.NAsdK5m6-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/riscv/net/bpf_jit_comp64.c:1008:37: error: incompatible pointer types passing 'struct bpf_tramp_link **' to parameter of type 'struct bpf_tramp_link *'; remove & [-Werror,-Wincompatible-pointer-types]
                   if (bpf_prog_calls_session_cookie(&tl->links[i])) {
                                                     ^~~~~~~~~~~~~
   include/linux/bpf.h:2199:73: note: passing argument to parameter 'link' here
   static inline bool bpf_prog_calls_session_cookie(struct bpf_tramp_link *link)
                                                                           ^
   1 error generated.

vim +1008 arch/riscv/net/bpf_jit_comp64.c

   998	
   999	static int invoke_bpf(struct bpf_tramp_links *tl, int args_off, int retval_off,
  1000			      int run_ctx_off, int func_meta_off, bool save_ret, u64 func_meta,
  1001			      int cookie_off, struct rv_jit_context *ctx)
  1002	{
  1003		int i, cur_cookie = (cookie_off - args_off) / 8;
  1004	
  1005		for (i = 0; i < tl->nr_links; i++) {
  1006			int err;
  1007	
> 1008			if (bpf_prog_calls_session_cookie(&tl->links[i])) {
  1009				u64 meta = func_meta | ((u64)cur_cookie << BPF_TRAMP_COOKIE_INDEX_SHIFT);
  1010	
  1011				emit_store_stack_imm64(RV_REG_T1, -func_meta_off, meta, ctx);
  1012				cur_cookie--;
  1013			}
  1014			err = invoke_bpf_prog(tl->links[i], args_off, retval_off, run_ctx_off,
  1015					      save_ret, ctx);
  1016			if (err)
  1017				return err;
  1018		}
  1019		return 0;
  1020	}
  1021	

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https://github.com/intel/lkp-tests/wiki