linux-kernel - [gustavoars:testing/wfamnae-next20250804 1/17] kernel/bpf/core.c:2612:22: warning: comparison of distinct pointer types ('struct bpf_prog_array *' and 'struct bpf_prog_array

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Message-ID: <202508041430.BdK5xJ23-lkp@intel.com>
Date: Mon, 4 Aug 2025 14:24:52 +0200
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [gustavoars:testing/wfamnae-next20250804 1/17]
 kernel/bpf/core.c:2612:22: warning: comparison of distinct pointer types
 ('struct bpf_prog_array *' and 'struct bpf_prog_array_hdr *')

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/wfamnae-next20250804
head:   77e4387959f9cf67aa8d2fa3cae21bdb5670245f
commit: 7c7e69659cdb6b689bfeff088a677871696d5482 [1/17] treewide_some: fix multiple -Wfamnae warnings that must be audited separately
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250804/202508041430.BdK5xJ23-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250804/202508041430.BdK5xJ23-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508041430.BdK5xJ23-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/bpf/core.c:2612:22: warning: comparison of distinct pointer types ('struct bpf_prog_array *' and 'struct bpf_prog_array_hdr *') [-Wcompare-distinct-pointer-types]
    2612 |         if (!progs || progs == &bpf_empty_prog_array.hdr)
         |                       ~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +2612 kernel/bpf/core.c

8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2609  
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2610  void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs)
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2611  {
8c7dcb84e3b744 Delyan Kratunov 2022-06-14 @2612  	if (!progs || progs == &bpf_empty_prog_array.hdr)
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2613  		return;
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2614  	call_rcu_tasks_trace(&progs->rcu, __bpf_prog_array_free_sleepable_cb);
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2615  }
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2616  

:::::: The code at line 2612 was first introduced by commit
:::::: 8c7dcb84e3b744b2b70baa7a44a9b1881c33a9c9 bpf: implement sleepable uprobes by chaining gps

:::::: TO: Delyan Kratunov <delyank@...com>
:::::: CC: Alexei Starovoitov <ast@...nel.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki