Re: [PATCH v6 3/6] vhost: Add the cgroup related function

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

Hi Cindy,

kernel test robot noticed the following build warnings:

[auto build test WARNING on v6.14-rc3]
[also build test WARNING on linus/master next-20250224]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Cindy-Lu/vhost-Add-a-new-parameter-in-vhost_dev-to-allow-user-select-kthread/20250223-234405
base:   v6.14-rc3
patch link:    https://lore.kernel.org/r/20250223154042.556001-4-lulu%40redhat.com
patch subject: [PATCH v6 3/6] vhost: Add the cgroup related function
config: x86_64-buildonly-randconfig-002-20250224 (https://download.01.org/0day-ci/archive/20250225/202502251038.6UlCIMJy-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250225/202502251038.6UlCIMJy-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502251038.6UlCIMJy-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/vhost/vhost.c:275: warning: Function parameter or struct member 'ignore_attachment' not described in '__vhost_worker_flush'


vim +275 drivers/vhost/vhost.c

0921dddcb589803 Mike Christie 2023-06-26  266  
228a27cf78afc63 Mike Christie 2023-06-26  267  /**
ba704ff4e142fd3 Mike Christie 2024-03-15  268   * __vhost_worker_flush - flush a worker
228a27cf78afc63 Mike Christie 2023-06-26  269   * @worker: worker to flush
228a27cf78afc63 Mike Christie 2023-06-26  270   *
ba704ff4e142fd3 Mike Christie 2024-03-15  271   * The worker's flush_mutex must be held.
228a27cf78afc63 Mike Christie 2023-06-26  272   */
84e88426e3bc18f Cindy Lu      2025-02-23  273  static void __vhost_worker_flush(struct vhost_worker *worker,
84e88426e3bc18f Cindy Lu      2025-02-23  274  				 bool ignore_attachment)
a6fc04739be7cd8 Mike Christie 2023-06-26 @275  {
228a27cf78afc63 Mike Christie 2023-06-26  276  	struct vhost_flush_struct flush;
228a27cf78afc63 Mike Christie 2023-06-26  277  
84e88426e3bc18f Cindy Lu      2025-02-23  278  	if ((!ignore_attachment && !worker->attachment_cnt) || worker->killed)
ba704ff4e142fd3 Mike Christie 2024-03-15  279  		return;
ba704ff4e142fd3 Mike Christie 2024-03-15  280  
228a27cf78afc63 Mike Christie 2023-06-26  281  	init_completion(&flush.wait_event);
228a27cf78afc63 Mike Christie 2023-06-26  282  	vhost_work_init(&flush.work, vhost_flush_work);
228a27cf78afc63 Mike Christie 2023-06-26  283  
228a27cf78afc63 Mike Christie 2023-06-26  284  	vhost_worker_queue(worker, &flush.work);
ba704ff4e142fd3 Mike Christie 2024-03-15  285  	/*
ba704ff4e142fd3 Mike Christie 2024-03-15  286  	 * Drop mutex in case our worker is killed and it needs to take the
ba704ff4e142fd3 Mike Christie 2024-03-15  287  	 * mutex to force cleanup.
ba704ff4e142fd3 Mike Christie 2024-03-15  288  	 */
ba704ff4e142fd3 Mike Christie 2024-03-15  289  	mutex_unlock(&worker->mutex);
228a27cf78afc63 Mike Christie 2023-06-26  290  	wait_for_completion(&flush.wait_event);
ba704ff4e142fd3 Mike Christie 2024-03-15  291  	mutex_lock(&worker->mutex);
ba704ff4e142fd3 Mike Christie 2024-03-15  292  }
ba704ff4e142fd3 Mike Christie 2024-03-15  293  

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