Re: [PATCH v4 09/24] dept: Apply Dept to seqlock

[kernel test robot <lkp@intel.com>]

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Hi Byungchul,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on tip/sched/core]
[also build test WARNING on linux/master linus/master v5.17-rc7]
[cannot apply to tip/locking/core hnaz-mm/master next-20220308]
[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/0day-ci/linux/commits/Byungchul-Park/DEPT-Dependency-Tracker/20220304-150943
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 25795ef6299f07ce3838f3253a9cb34f64efcfae
:::::: branch date: 4 days ago
:::::: commit date: 4 days ago
config: s390-randconfig-m031-20220307 (https://download.01.org/0day-ci/archive/20220309/202203090250.tz4le5AI-lkp(a)intel.com/config)
compiler: s390-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

New smatch warnings:
include/linux/cpuset.h:176 set_mems_allowed() warn: statement has no effect 31
kernel/cgroup/cpuset.c:1743 cpuset_change_task_nodemask() warn: statement has no effect 31
net/xfrm/xfrm_state.c:179 xfrm_hash_resize() warn: statement has no effect 31
net/xfrm/xfrm_policy.c:600 xfrm_bydst_resize() warn: statement has no effect 31
net/xfrm/xfrm_policy.c:1091 __xfrm_policy_inexact_prune_bin() warn: statement has no effect 31
net/xfrm/xfrm_policy.c:1148 xfrm_policy_inexact_alloc_chain() warn: statement has no effect 31
net/xfrm/xfrm_policy.c:1358 xfrm_hash_rebuild() warn: statement has no effect 31

Old smatch warnings:
net/xfrm/xfrm_policy.c:1162 xfrm_policy_inexact_alloc_chain() warn: statement has no effect 31
net/xfrm/xfrm_policy.c:1178 xfrm_policy_inexact_alloc_chain() warn: statement has no effect 31

vim +176 include/linux/cpuset.h

c0ff7453bb5c7c Miao Xie    2010-05-24  167  
58568d2a8215cb Miao Xie    2009-06-16  168  static inline void set_mems_allowed(nodemask_t nodemask)
58568d2a8215cb Miao Xie    2009-06-16  169  {
db751fe3ea6880 John Stultz 2013-10-07  170  	unsigned long flags;
db751fe3ea6880 John Stultz 2013-10-07  171  
c0ff7453bb5c7c Miao Xie    2010-05-24  172  	task_lock(current);
db751fe3ea6880 John Stultz 2013-10-07  173  	local_irq_save(flags);
cc9a6c8776615f Mel Gorman  2012-03-21  174  	write_seqcount_begin(&current->mems_allowed_seq);
58568d2a8215cb Miao Xie    2009-06-16  175  	current->mems_allowed = nodemask;
cc9a6c8776615f Mel Gorman  2012-03-21 @176  	write_seqcount_end(&current->mems_allowed_seq);
db751fe3ea6880 John Stultz 2013-10-07  177  	local_irq_restore(flags);
c0ff7453bb5c7c Miao Xie    2010-05-24  178  	task_unlock(current);
58568d2a8215cb Miao Xie    2009-06-16  179  }
58568d2a8215cb Miao Xie    2009-06-16  180  

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