[mingo-tip:sched/headers 203/2375] kernel/kcsan/permissive.h:31:26: error: no member named 'flags' in 'struct task_struct'

From: kernel test robot
Date: Sat Jan 08 2022 - 16:22:51 EST


tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head: 351ceeab2ef96ab2fc306934ddb201b44636181b
commit: 6d8683d081e753b3921879e105659a4bcfd9c08c [203/2375] headers/deps: Move task_struct::flags to per_task()
config: x86_64-buildonly-randconfig-r004-20220108 (https://download.01.org/0day-ci/archive/20220109/202201090555.OpViV38G-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f3a344d2125fa37e59bae1b0874442c650a19607)
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
# https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=6d8683d081e753b3921879e105659a4bcfd9c08c
git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
git fetch --no-tags mingo-tip sched/headers
git checkout 6d8683d081e753b3921879e105659a4bcfd9c08c
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

In file included from kernel/kcsan/core.c:25:
>> kernel/kcsan/permissive.h:31:26: error: no member named 'flags' in 'struct task_struct'
return ptr == &current->flags;
~~~~~~~ ^
1 error generated.


vim +31 kernel/kcsan/permissive.h

49f72d5358dd3c Marco Elver 2021-06-07 18
49f72d5358dd3c Marco Elver 2021-06-07 19 /*
49f72d5358dd3c Marco Elver 2021-06-07 20 * Access ignore rules based on address.
49f72d5358dd3c Marco Elver 2021-06-07 21 */
49f72d5358dd3c Marco Elver 2021-06-07 22 static __always_inline bool kcsan_ignore_address(const volatile void *ptr)
49f72d5358dd3c Marco Elver 2021-06-07 23 {
49f72d5358dd3c Marco Elver 2021-06-07 24 if (!IS_ENABLED(CONFIG_KCSAN_PERMISSIVE))
49f72d5358dd3c Marco Elver 2021-06-07 25 return false;
49f72d5358dd3c Marco Elver 2021-06-07 26
d8fd74d35a8d3c Marco Elver 2021-06-07 27 /*
d8fd74d35a8d3c Marco Elver 2021-06-07 28 * Data-racy bitops on current->flags are too common, ignore completely
d8fd74d35a8d3c Marco Elver 2021-06-07 29 * for now.
d8fd74d35a8d3c Marco Elver 2021-06-07 30 */
d8fd74d35a8d3c Marco Elver 2021-06-07 @31 return ptr == &current->flags;
49f72d5358dd3c Marco Elver 2021-06-07 32 }
49f72d5358dd3c Marco Elver 2021-06-07 33

:::::: The code at line 31 was first introduced by commit
:::::: d8fd74d35a8d3c602232e3238e916bda9d03d520 kcsan: permissive: Ignore data-racy 1-bit value changes

:::::: TO: Marco Elver <elver@xxxxxxxxxx>
:::::: CC: Paul E. McKenney <paulmck@xxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx