linux-kernel - Re: [PATCH v2 2/8] genirq: soft_moderation: add base files, procfs

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Message-ID: <202511171936.CT5XHXPZ-lkp@intel.com>
Date: Mon, 17 Nov 2025 19:12:14 +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 v2 2/8] genirq: soft_moderation: add base files, procfs

Hi Luigi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/irq/core]
[also build test WARNING on tip/x86/core tip/master linus/master v6.18-rc6 next-20251114]
[cannot apply to tip/auto-latest]
[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-platform-wide-interrupt-moderation-Documentation-Kconfig-irq_desc/20251117-023148
base:   tip/irq/core
patch link:    https://lore.kernel.org/r/20251116182839.939139-3-lrizzo%40google.com
patch subject: [PATCH v2 2/8] genirq: soft_moderation: add base files, procfs
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20251117/202511171936.CT5XHXPZ-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251117/202511171936.CT5XHXPZ-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/202511171936.CT5XHXPZ-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/irq/irq_moderation.c:103: warning: ignoring '#pragma clang diagnostic' [-Wunknown-pragmas]
     103 | #pragma clang diagnostic error "-Wformat"
   In file included from include/linux/uaccess.h:10,
                    from include/linux/sched/task.h:13,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:34,
                    from include/linux/seq_file.h:11,
                    from kernel/irq/irq_moderation.c:8:
   In function 'check_copy_size',
       inlined from 'copy_from_user' at include/linux/uaccess.h:207:7,
       inlined from 'moderation_write' at kernel/irq/irq_moderation.c:169:6:
   include/linux/ucopysize.h:54:25: error: call to '__bad_copy_to' declared with attribute error: copy destination size is too small
      54 |                         __bad_copy_to();
         |                         ^~~~~~~~~~~~~~~
   In function 'check_copy_size',
       inlined from 'copy_from_user' at include/linux/uaccess.h:207:7,
       inlined from 'mode_write' at kernel/irq/irq_moderation.c:223:6:
   include/linux/ucopysize.h:54:25: error: call to '__bad_copy_to' declared with attribute error: copy destination size is too small
      54 |                         __bad_copy_to();
         |                         ^~~~~~~~~~~~~~~


vim +103 kernel/irq/irq_moderation.c

   102	
 > 103	#pragma clang diagnostic error "-Wformat"
   104	/* Print statistics */
   105	static int moderation_show(struct seq_file *p, void *v)
   106	{
   107		uint delay_us = irq_mod_info.delay_us;
   108		int j;
   109	

-- 
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https://github.com/intel/lkp-tests/wiki