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Date: Mon, 6 Jun 2022 12:05:50 +0800
From: kernel test robot <lkp@...el.com>
To: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
Jan Kara <jack@...e.com>
Cc: llvm@...ts.linux.dev, 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]
[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: riscv-randconfig-c006-20220605 (https://download.01.org/0day-ci/archive/20220606/202206061112.keHlFIBA-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project b92436efcb7813fc481b30f2593a4907568d917a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv-linux-gnu
# 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
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash fs/quota/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> fs/quota/dquot.c:2184:19: warning: comparison of distinct pointer types ('typeof (toread) *' (aka 'unsigned int *') and 'typeof (((1UL) << (12)) - ((unsigned long)(pos) & ~(~(((1UL) << (12)) - 1)))) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
size_t tocopy = min(toread, PAGE_SIZE - offset_in_page(pos));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:45:19: note: expanded from macro 'min'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
error: A dwo section may not contain relocations
fatal error: too many errors emitted, stopping now [-ferror-limit=]
1 warning and 20 errors generated.
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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