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Message-ID: <202310290041.L5ndwcQ9-lkp@intel.com>
Date: Sun, 29 Oct 2023 01:14:58 +0800
From: kernel test robot <lkp@...el.com>
To: David Woodhouse <dwmw2@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
Waiman Long <longman@...hat.com>,
Boqun Feng <boqun.feng@...il.com>,
linux-kernel <linux-kernel@...r.kernel.org>
Cc: oe-kbuild-all@...ts.linux.dev, Juergen Gross <jgross@...e.com>
Subject: Re: [PATCH] lockdep: add lockdep_cleanup_dead_cpu()
Hi David,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/smp/core]
[also build test WARNING on tip/locking/core linus/master v6.6-rc7 next-20231027]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/David-Woodhouse/lockdep-add-lockdep_cleanup_dead_cpu/20231028-191538
base: tip/smp/core
patch link: https://lore.kernel.org/r/e5ba02138c31da60daf91ce505ac3860d022332b.camel%40infradead.org
patch subject: [PATCH] lockdep: add lockdep_cleanup_dead_cpu()
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20231029/202310290041.L5ndwcQ9-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231029/202310290041.L5ndwcQ9-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/202310290041.L5ndwcQ9-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/locking/lockdep.c:4557: warning: Function parameter or member 'cpu' not described in 'lockdep_cleanup_dead_cpu'
>> kernel/locking/lockdep.c:4557: warning: Function parameter or member 'idle' not described in 'lockdep_cleanup_dead_cpu'
vim +4557 kernel/locking/lockdep.c
4548
4549 /**
4550 * lockdep_cleanup_dead_cpu - Ensure CPU lockdep state is cleanly stopped
4551 *
4552 * Invoked after the CPU is dead. Ensures that the tracing infrastructure
4553 * is left in a suitable state for the CPU to be subsequently brought
4554 * online again.
4555 */
4556 void lockdep_cleanup_dead_cpu(unsigned int cpu, struct task_struct *idle)
> 4557 {
4558 if (unlikely(!debug_locks))
4559 return;
4560
4561 if (unlikely(per_cpu(hardirqs_enabled, cpu))) {
4562 pr_warn("CPU %u left hardirqs enabled!", cpu);
4563 if (idle)
4564 print_irqtrace_events(idle);
4565 /* Clean it up for when the CPU comes online again. */
4566 per_cpu(hardirqs_enabled, cpu) = 0;
4567 }
4568 }
4569
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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