fs/notify/fanotify/fanotify_user.c:154:24: warning: variable 'info' set but not used
From: kernel test robot
Date: Tue Jan 18 2022 - 15:34:16 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 99613159ad749543621da8238acf1a122880144e
commit: 7326e382c21e9c23c89c88369afdc90b82a14da8 fanotify: report old and/or new parent+name in FAN_RENAME event
date: 5 weeks ago
config: x86_64-randconfig-m001-20220117 (https://download.01.org/0day-ci/archive/20220119/202201190416.xidpRFf8-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7326e382c21e9c23c89c88369afdc90b82a14da8
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 7326e382c21e9c23c89c88369afdc90b82a14da8
# save the config file to linux build tree
mkdir build_dir
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/notify/ mm//
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
fs/notify/fanotify/fanotify_user.c: In function 'fanotify_event_len':
>> fs/notify/fanotify/fanotify_user.c:154:24: warning: variable 'info' set but not used [-Wunused-but-set-variable]
154 | struct fanotify_info *info;
| ^~~~
vim +/info +154 fs/notify/fanotify/fanotify_user.c
7326e382c21e9c Amir Goldstein 2021-11-29 149
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 150 static size_t fanotify_event_len(unsigned int info_mode,
929943b38daf81 Amir Goldstein 2020-07-16 151 struct fanotify_event *event)
5e469c830fdb5a Amir Goldstein 2019-01-10 152 {
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 153 size_t event_len = FAN_EVENT_METADATA_LEN;
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 @154 struct fanotify_info *info;
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 155 int fh_len;
929943b38daf81 Amir Goldstein 2020-07-16 156 int dot_len = 0;
f454fa610a69b9 Amir Goldstein 2020-07-16 157
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 158 if (!info_mode)
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 159 return event_len;
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 160
130a3c742107ac Gabriel Krisman Bertazi 2021-10-25 161 if (fanotify_is_error_event(event->mask))
130a3c742107ac Gabriel Krisman Bertazi 2021-10-25 162 event_len += FANOTIFY_ERROR_INFO_LEN;
130a3c742107ac Gabriel Krisman Bertazi 2021-10-25 163
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 164 info = fanotify_event_info(event);
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 165
7326e382c21e9c Amir Goldstein 2021-11-29 166 if (fanotify_event_has_any_dir_fh(event)) {
7326e382c21e9c Amir Goldstein 2021-11-29 167 event_len += fanotify_dir_name_info_len(event);
d3424c9bac893b Matthew Bobrowski 2021-08-08 168 } else if ((info_mode & FAN_REPORT_NAME) &&
d3424c9bac893b Matthew Bobrowski 2021-08-08 169 (event->mask & FAN_ONDIR)) {
929943b38daf81 Amir Goldstein 2020-07-16 170 /*
929943b38daf81 Amir Goldstein 2020-07-16 171 * With group flag FAN_REPORT_NAME, if name was not recorded in
929943b38daf81 Amir Goldstein 2020-07-16 172 * event on a directory, we will report the name ".".
929943b38daf81 Amir Goldstein 2020-07-16 173 */
929943b38daf81 Amir Goldstein 2020-07-16 174 dot_len = 1;
929943b38daf81 Amir Goldstein 2020-07-16 175 }
afc894c784c84c Jan Kara 2020-03-24 176
af579beb666aef Matthew Bobrowski 2021-08-08 177 if (info_mode & FAN_REPORT_PIDFD)
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 178 event_len += FANOTIFY_PIDFD_INFO_HDR_LEN;
af579beb666aef Matthew Bobrowski 2021-08-08 179
4bd5a5c8e6e5cd Gabriel Krisman Bertazi 2021-10-25 180 if (fanotify_event_has_object_fh(event)) {
4bd5a5c8e6e5cd Gabriel Krisman Bertazi 2021-10-25 181 fh_len = fanotify_event_object_fh_len(event);
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 182 event_len += fanotify_fid_info_len(fh_len, dot_len);
4bd5a5c8e6e5cd Gabriel Krisman Bertazi 2021-10-25 183 }
5e469c830fdb5a Amir Goldstein 2019-01-10 184
b9928e80dda84b Gabriel Krisman Bertazi 2021-10-25 185 return event_len;
5e469c830fdb5a Amir Goldstein 2019-01-10 186 }
5e469c830fdb5a Amir Goldstein 2019-01-10 187
:::::: The code at line 154 was first introduced by commit
:::::: b9928e80dda84b349ba8de01780b9bef2fc36ffa fanotify: Fold event size calculation to its own function
:::::: TO: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
:::::: CC: Jan Kara <jack@xxxxxxx>
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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx