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Message-ID: <202206061211.HKxbKbgS-lkp@intel.com>
Date: Mon, 6 Jun 2022 12:36:17 +0800
From: kernel test robot <lkp@...el.com>
To: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
Jan Kara <jack@...e.com>
Cc: kbuild-all@...ts.01.org,
"Matthew Wilcox (Oracle)" <willy@...radead.org>, tytso@....edu,
Andreas Dilger <adilger.kernel@...ger.ca>,
linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 2/3] quota: Support using the page cache for quota files
Hi "Matthew,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tytso-ext4/dev]
[also build test WARNING on jack-fs/for_next linus/master v5.19-rc1 next-20220603]
[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]
url: https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox-Oracle/Cache-quota-files-in-the-page-cache/20220606-021629
base: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220606/202206061211.HKxbKbgS-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-18-g56afb504-dirty
# https://github.com/intel-lab-lkp/linux/commit/a7ff347e002ef476c8c116f30858f83529638a9b
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Matthew-Wilcox-Oracle/Cache-quota-files-in-the-page-cache/20220606-021629
git checkout a7ff347e002ef476c8c116f30858f83529638a9b
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash fs/quota/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> fs/quota/dquot.c:2184:33: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> fs/quota/dquot.c:2184:33: sparse: unsigned int *
>> fs/quota/dquot.c:2184:33: sparse: unsigned long *
vim +2184 fs/quota/dquot.c
2165
2166 ssize_t generic_quota_read(struct super_block *sb, int type, char *data,
2167 size_t len, loff_t pos)
2168 {
2169 struct inode *inode = sb_dqopt(sb)->files[type];
2170 struct address_space *mapping = inode->i_mapping;
2171 size_t toread;
2172 pgoff_t index;
2173 loff_t i_size = i_size_read(inode);
2174
2175 if (pos > i_size)
2176 return 0;
2177 if (pos + len > i_size)
2178 len = i_size - pos;
2179 toread = len;
2180 index = pos / PAGE_SIZE;
2181
2182 while (toread > 0) {
2183 struct folio *folio = read_mapping_folio(mapping, index, NULL);
> 2184 size_t tocopy = min(toread, PAGE_SIZE - offset_in_page(pos));
2185 void *src;
2186
2187 if (folio == ERR_PTR(-ENOMEM)) {
2188 memalloc_retry_wait(GFP_NOFS);
2189 continue;
2190 } else if (IS_ERR(folio))
2191 return PTR_ERR(folio);
2192
2193 src = kmap_local_folio(folio, offset_in_folio(folio, pos));
2194 memcpy(data, src, tocopy);
2195 kunmap_local(src);
2196 folio_put(folio);
2197
2198 toread -= tocopy;
2199 data += tocopy;
2200 pos += tocopy;
2201 index++;
2202 }
2203 return len;
2204 }
2205 EXPORT_SYMBOL(generic_quota_read);
2206
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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