Re: [PATCH 07/18] rcu/tree: Simplify debug_objects handling

[kbuild test robot]

Hi "Joel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on rcu/dev]
[also build test ERROR on rcu/rcu/next next-20200327]
[cannot apply to linus/master linux/master v5.6]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Joel-Fernandes-Google/kfree_rcu-improvements-for-rcu-dev/20200330-113719
base:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.5.0-5) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

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

All errors (new ones prefixed by >>):

   kernel/rcu/tree.c: In function 'debug_rcu_bhead_unqueue':
>> kernel/rcu/tree.c:2880:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int i = 0; i < bhead->nr_records; i++)
     ^~~
   kernel/rcu/tree.c:2880:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code

vim +/for +2880 kernel/rcu/tree.c

  2875	
  2876	static __always_inline void
  2877	debug_rcu_bhead_unqueue(struct kfree_rcu_bulk_data *bhead)
  2878	{
  2879	#ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD
> 2880		for (int i = 0; i < bhead->nr_records; i++)
  2881			debug_rcu_head_unqueue((struct rcu_head *)(bhead->records[i]));
  2882	#endif
  2883	}
  2884	

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Attachment: .config.gz
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