linux-kernel - [gustavoars:testing/wfamnae-next20251201 10/21] kernel/bpf/core.c:2608:29: warning: comparison of distinct pointer types lacks a cast

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Message-ID: <202512100734.AwVYxrr5-lkp@intel.com>
Date: Wed, 10 Dec 2025 07:20:04 +0100
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev,
	"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [gustavoars:testing/wfamnae-next20251201 10/21]
 kernel/bpf/core.c:2608:29: warning: comparison of distinct pointer types
 lacks a cast

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/wfamnae-next20251201
head:   2c162acfacfa32b76ad4176574a222a0e47f9df4
commit: a74d9213de5acaa81c034ea3836265a5f406e30b [10/21] treewide_some: fix multiple -Wfamnae warnings that must be audited separately
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20251210/202512100734.AwVYxrr5-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251210/202512100734.AwVYxrr5-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/202512100734.AwVYxrr5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/bpf/core.c: In function 'bpf_prog_array_free_sleepable':
>> kernel/bpf/core.c:2608:29: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
    2608 |         if (!progs || progs == &bpf_empty_prog_array.hdr)
         |                             ^~


vim +2608 kernel/bpf/core.c

8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2605  
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2606  void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs)
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2607  {
8c7dcb84e3b744 Delyan Kratunov 2022-06-14 @2608  	if (!progs || progs == &bpf_empty_prog_array.hdr)
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2609  		return;
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2610  	call_rcu_tasks_trace(&progs->rcu, __bpf_prog_array_free_sleepable_cb);
8c7dcb84e3b744 Delyan Kratunov 2022-06-14  2611  }
8c7dcb84e3b744 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