linux-kernel - [gustavoars:testing/wfamnae-next20251210 10/20] kernel/bpf/core.c:2608:22: warning: comparison of distinct pointer types ('struct bpf_prog_array *' and 'struct bpf_prog_array

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Message-ID: <202512110957.bdkyzTzG-lkp@intel.com>
Date: Thu, 11 Dec 2025 09:27:32 +0800
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-next20251210 10/20]
 kernel/bpf/core.c:2608:22: 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-next20251210
head:   ea71f4781aeb04a51e64f521bd95b80be09c14ae
commit: 69cad6a5b5543737a73e8a9dcd366cbf2fbef9ff [10/20] treewide_some: fix multiple -Wfamnae warnings that must be audited separately
config: arm-defconfig (https://download.01.org/0day-ci/archive/20251211/202512110957.bdkyzTzG-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 6ec8c4351cfc1d0627d1633b02ea787bd29c77d8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512110957.bdkyzTzG-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/202512110957.bdkyzTzG-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/bpf/core.c:2608:22: warning: comparison of distinct pointer types ('struct bpf_prog_array *' and 'struct bpf_prog_array_hdr *') [-Wcompare-distinct-pointer-types]
    2608 |         if (!progs || progs == &bpf_empty_prog_array.hdr)
         |                       ~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +2608 kernel/bpf/core.c

8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2605  
8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2606  void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs)
8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2607  {
8c7dcb84e3b744b Delyan Kratunov 2022-06-14 @2608  	if (!progs || progs == &bpf_empty_prog_array.hdr)
8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2609  		return;
8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2610  	call_rcu_tasks_trace(&progs->rcu, __bpf_prog_array_free_sleepable_cb);
8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2611  }
8c7dcb84e3b744b Delyan Kratunov 2022-06-14  2612  

:::::: The code at line 2608 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