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Date:   Thu, 4 May 2017 09:07:52 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: [rcu:rcu/dev 57/76] htmldocs: kernel/rcu/update.c:597: warning: No
 description found for parameter 'rhp'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev
head:   901e798bdc9249ffd86a4d4cb002a6772660e41d
commit: e3f53ab9491c1c4b321bde579c906a630fab4da8 [57/76] rcu: Move docbook comments out of rcupdate.h
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   include/linux/init.h:1: warning: no structured comments found
   kernel/sched/core.c:2085: warning: No description found for parameter 'rf'
   kernel/sched/core.c:2085: warning: Excess function parameter 'cookie' description in 'try_to_wake_up_local'
   include/linux/kthread.h:26: warning: Excess function parameter '...' description in 'kthread_create'
   kernel/sys.c:1: warning: no structured comments found
>> kernel/rcu/update.c:597: warning: No description found for parameter 'rhp'
>> kernel/rcu/update.c:597: warning: Excess function parameter 'head' description in 'call_rcu_tasks'
   include/linux/device.h:969: warning: No description found for parameter 'dma_ops'
   drivers/dma-buf/seqno-fence.c:1: warning: no structured comments found
   include/linux/iio/iio.h:597: warning: No description found for parameter 'trig_readonly'
   include/linux/iio/trigger.h:151: warning: No description found for parameter 'indio_dev'
   include/linux/iio/trigger.h:151: warning: No description found for parameter 'trig'
   include/linux/device.h:970: warning: No description found for parameter 'dma_ops'
   drivers/regulator/core.c:1467: warning: Excess function parameter 'ret' description in 'regulator_dev_lookup'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'open'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'preclose'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'postclose'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'lastclose'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'set_busid'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'irq_handler'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'irq_preinstall'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'irq_postinstall'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'irq_uninstall'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'debugfs_init'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'debugfs_cleanup'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_open_object'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_close_object'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'prime_handle_to_fd'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'prime_fd_to_handle'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_export'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_import'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_pin'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_unpin'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_res_obj'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_get_sg_table'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_import_sg_table'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_vmap'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_vunmap'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_prime_mmap'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'gem_vm_ops'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'major'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'minor'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'patchlevel'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'name'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'desc'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'date'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'driver_features'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'ioctls'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'num_ioctls'
   include/drm/drm_drv.h:438: warning: No description found for parameter 'fops'
   include/drm/drm_color_mgmt.h:1: warning: no structured comments found
   drivers/gpu/drm/drm_fb_cma_helper.c:557: warning: Excess function parameter 'num_crtc' description in 'drm_fbdev_cma_init'
   drivers/gpu/drm/drm_fb_cma_helper.c:558: warning: Excess function parameter 'num_crtc' description in 'drm_fbdev_cma_init'
   drivers/gpu/drm/i915/intel_lpe_audio.c:342: warning: No description found for parameter 'pipe'
   drivers/gpu/drm/i915/intel_lpe_audio.c:342: warning: No description found for parameter 'dp_output'
   drivers/gpu/drm/i915/intel_lpe_audio.c:342: warning: No description found for parameter 'link_rate'
   drivers/gpu/drm/i915/intel_lpe_audio.c:343: warning: No description found for parameter 'pipe'
   drivers/gpu/drm/i915/intel_lpe_audio.c:343: warning: No description found for parameter 'dp_output'
   drivers/gpu/drm/i915/intel_lpe_audio.c:343: warning: No description found for parameter 'link_rate'
   drivers/media/dvb-core/dvb_frontend.h:677: warning: No description found for parameter 'refcount'
   Documentation/core-api/assoc_array.rst:13: WARNING: Enumerated list ends without a blank line; unexpected unindent.
   Documentation/doc-guide/sphinx.rst:110: ERROR: Unknown target name: "sphinx c domain".
   kernel/sched/fair.c:7616: WARNING: Inline emphasis start-string without end-string.
   kernel/time/timer.c:1200: ERROR: Unexpected indentation.
   kernel/time/timer.c:1202: ERROR: Unexpected indentation.
   kernel/time/timer.c:1203: WARNING: Block quote ends without a blank line; unexpected unindent.
   include/linux/wait.h:122: WARNING: Block quote ends without a blank line; unexpected unindent.
   include/linux/wait.h:125: ERROR: Unexpected indentation.
   include/linux/wait.h:127: WARNING: Block quote ends without a blank line; unexpected unindent.
   kernel/time/hrtimer.c:990: WARNING: Block quote ends without a blank line; unexpected unindent.
   kernel/signal.c:322: WARNING: Inline literal start-string without end-string.
   kernel/rcu/tree.c:3225: ERROR: Unexpected indentation.
   kernel/rcu/tree.c:3226: WARNING: Bullet list ends without a blank line; unexpected unindent.
   kernel/rcu/tree.c:3252: ERROR: Unexpected indentation.
   kernel/rcu/tree.c:3253: WARNING: Bullet list ends without a blank line; unexpected unindent.
   include/linux/iio/iio.h:219: ERROR: Unexpected indentation.
   include/linux/iio/iio.h:220: WARNING: Block quote ends without a blank line; unexpected unindent.
   include/linux/iio/iio.h:226: WARNING: Definition list ends without a blank line; unexpected unindent.
   drivers/iio/industrialio-core.c:638: ERROR: Unknown target name: "iio_val".
   drivers/iio/industrialio-core.c:645: ERROR: Unknown target name: "iio_val".
   drivers/message/fusion/mptbase.c:5051: WARNING: Definition list ends without a blank line; unexpected unindent.
   drivers/tty/serial/serial_core.c:1898: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/linux/regulator/driver.h:271: ERROR: Unknown target name: "regulator_regmap_x_voltage".
   include/linux/spi/spi.h:369: ERROR: Unexpected indentation.
   drivers/usb/core/message.c:478: ERROR: Unexpected indentation.
   drivers/usb/core/message.c:479: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/usb.rst:623: ERROR: Unknown target name: "usb_type".
   Documentation/driver-api/usb.rst:623: ERROR: Unknown target name: "usb_dir".
   Documentation/driver-api/usb.rst:623: ERROR: Unknown target name: "usb_recip".
   Documentation/driver-api/usb.rst:689: ERROR: Unknown target name: "usbdevfs_urb_type".
   sound/soc/soc-core.c:2670: ERROR: Unknown target name: "snd_soc_daifmt".
   sound/core/jack.c:312: ERROR: Unknown target name: "snd_jack_btn".
   WARNING: dvipng command 'dvipng' cannot be run (needed for math display), check the imgmath_dvipng setting

vim +/rhp +597 kernel/rcu/update.c

e3f53ab9 Paul E. McKenney 2017-05-03  581   *
e3f53ab9 Paul E. McKenney 2017-05-03  582   * The callback function will be invoked some time after a full grace
e3f53ab9 Paul E. McKenney 2017-05-03  583   * period elapses, in other words after all currently executing RCU
e3f53ab9 Paul E. McKenney 2017-05-03  584   * read-side critical sections have completed. call_rcu_tasks() assumes
e3f53ab9 Paul E. McKenney 2017-05-03  585   * that the read-side critical sections end at a voluntary context
e3f53ab9 Paul E. McKenney 2017-05-03  586   * switch (not a preemption!), entry into idle, or transition to usermode
e3f53ab9 Paul E. McKenney 2017-05-03  587   * execution.  As such, there are no read-side primitives analogous to
e3f53ab9 Paul E. McKenney 2017-05-03  588   * rcu_read_lock() and rcu_read_unlock() because this primitive is intended
e3f53ab9 Paul E. McKenney 2017-05-03  589   * to determine that all tasks have passed through a safe state, not so
e3f53ab9 Paul E. McKenney 2017-05-03  590   * much for data-strcuture synchronization.
e3f53ab9 Paul E. McKenney 2017-05-03  591   *
e3f53ab9 Paul E. McKenney 2017-05-03  592   * See the description of call_rcu() for more detailed information on
e3f53ab9 Paul E. McKenney 2017-05-03  593   * memory ordering guarantees.
84a8f446 Paul E. McKenney 2014-08-04  594   */
b6a4ae76 Boqun Feng       2015-07-29  595  void call_rcu_tasks(struct rcu_head *rhp, rcu_callback_t func)
8315f422 Paul E. McKenney 2014-06-27  596  {
8315f422 Paul E. McKenney 2014-06-27 @597  	unsigned long flags;
c7b24d2b Paul E. McKenney 2014-07-28  598  	bool needwake;
4929c913 Paul E. McKenney 2016-05-02  599  	bool havetask = READ_ONCE(rcu_tasks_kthread_ptr);
8315f422 Paul E. McKenney 2014-06-27  600  
8315f422 Paul E. McKenney 2014-06-27  601  	rhp->next = NULL;
8315f422 Paul E. McKenney 2014-06-27  602  	rhp->func = func;
8315f422 Paul E. McKenney 2014-06-27  603  	raw_spin_lock_irqsave(&rcu_tasks_cbs_lock, flags);
c7b24d2b Paul E. McKenney 2014-07-28  604  	needwake = !rcu_tasks_cbs_head;
8315f422 Paul E. McKenney 2014-06-27  605  	*rcu_tasks_cbs_tail = rhp;

:::::: The code at line 597 was first introduced by commit
:::::: 8315f42295d2667a7f942f154b73a86fd7cb2227 rcu: Add call_rcu_tasks()

:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

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