linux-kernel - Re: [PATCH v4 2/3] genirq: Fixed-delay Global Software Interrupt Moderation (GSIM)

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Message-ID: <202601160733.QNd6lcMA-lkp@intel.com>
Date: Fri, 16 Jan 2026 07:53:28 +0800
From: kernel test robot <lkp@...el.com>
To: Luigi Rizzo <lrizzo@...gle.com>, Thomas Gleixner <tglx@...utronix.de>,
	Marc Zyngier <maz@...nel.org>, Luigi Rizzo <rizzo.unipi@...il.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sean Christopherson <seanjc@...gle.com>,
	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc: oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Bjorn Helgaas <helgaas@...nel.org>,
	Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH v4 2/3] genirq: Fixed-delay Global Software Interrupt
 Moderation (GSIM)

Hi Luigi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.19-rc5]
[cannot apply to tip/irq/core next-20260115]
[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/Luigi-Rizzo/genirq-Add-flags-for-software-interrupt-moderation/20260116-000808
base:   linus/master
patch link:    https://lore.kernel.org/r/20260115155942.482137-3-lrizzo%40google.com
patch subject: [PATCH v4 2/3] genirq: Fixed-delay Global Software Interrupt Moderation (GSIM)
config: arm-randconfig-r123-20260116 (https://download.01.org/0day-ci/archive/20260116/202601160733.QNd6lcMA-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260116/202601160733.QNd6lcMA-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/202601160733.QNd6lcMA-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/irq/irq_moderation.c:404:23: sparse: sparse: symbol 'mod_nb' was not declared. Should it be static?
   kernel/irq/irq_moderation.c:298:9: sparse: sparse: context imbalance in 'mode_write' - different lock contexts for basic block
   kernel/irq/irq_moderation.c:330:9: sparse: sparse: context imbalance in 'drain_desc_list' - different lock contexts for basic block

vim +/mod_nb +404 kernel/irq/irq_moderation.c

   403	
 > 404	struct notifier_block mod_nb = {
   405		.notifier_call	= mod_pm_notifier_cb,
   406		.priority	= 100,
   407	};
   408	

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