linux-kernel - Re: [PATCH -next v2 17/22] ext4: implement partial block zero range iomap path

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Message-ID: <202602040854.1tmFmFGB-lkp@intel.com>
Date: Wed, 4 Feb 2026 08:21:56 +0800
From: kernel test robot <lkp@...el.com>
To: Zhang Yi <yi.zhang@...wei.com>, linux-ext4@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, tytso@....edu,
	adilger.kernel@...ger.ca, jack@...e.cz, ojaswin@...ux.ibm.com,
	ritesh.list@...il.com, hch@...radead.org, djwong@...nel.org,
	yi.zhang@...wei.com, yi.zhang@...weicloud.com, yizhang089@...il.com,
	libaokun1@...wei.com, yangerkun@...wei.com, yukuai@...as.com
Subject: Re: [PATCH -next v2 17/22] ext4: implement partial block zero range
 iomap path

Hi Zhang,

kernel test robot noticed the following build warnings:

[auto build test WARNING on next-20260202]

url:    https://github.com/intel-lab-lkp/linux/commits/Zhang-Yi/ext4-make-ext4_block_zero_page_range-pass-out-did_zero/20260203-144244
base:   next-20260202
patch link:    https://lore.kernel.org/r/20260203062523.3869120-18-yi.zhang%40huawei.com
patch subject: [PATCH -next v2 17/22] ext4: implement partial block zero range iomap path
config: m68k-randconfig-r123-20260204 (https://download.01.org/0day-ci/archive/20260204/202602040854.1tmFmFGB-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 13.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260204/202602040854.1tmFmFGB-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/202602040854.1tmFmFGB-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> fs/ext4/inode.c:4151:24: sparse: sparse: symbol 'ext4_iomap_zero_ops' was not declared. Should it be static?
   fs/ext4/inode.c:4164:24: sparse: sparse: symbol 'ext4_iomap_buffered_read_ops' was not declared. Should it be static?
   fs/ext4/inode.c:5135:32: sparse: sparse: unsigned value that used to be signed checked against zero?
   fs/ext4/inode.c:5134:52: sparse: signed value source

vim +/ext4_iomap_zero_ops +4151 fs/ext4/inode.c

  4150	
> 4151	const struct iomap_ops ext4_iomap_zero_ops = {
  4152		.iomap_begin = ext4_iomap_zero_begin,
  4153	};
  4154	

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