Re: [Qemu-devel] [PATCH v10 4/6] mm: function to offer a page block on the free list

[kbuild test robot]

Hi Wei,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.11 next-20170504]
[if your patch is applied to the wrong git tree, please drop us a note to help 
improve the system]

url:    
https://github.com/0day-ci/linux/commits/Wei-Wang/Extend-virtio-balloon-for-fast-de-inflating-fast-live-migration/20170505-052958
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   WARNING: convert(1) not found, for SVG to PDF conversion install ImageMagick 
(https://www.imagemagick.org)
   arch/x86/include/asm/uaccess_32.h:1: warning: no structured comments found
>> mm/page_alloc.c:4663: warning: No description found for parameter 'zone'
>> mm/page_alloc.c:4663: warning: No description found for parameter 'order'
>> mm/page_alloc.c:4663: warning: No description found for parameter 
>> 'migratetype'
>> mm/page_alloc.c:4663: warning: No description found for parameter 'page'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'
   include/net/cfg80211.h:1738: warning: No description found for parameter 
'report_results'
   include/net/cfg80211.h:1738: warning: Excess struct/union/enum/typedef 
member 'results_wk' description in 'cfg80211_sched_scan_request'

vim +/zone +4663 mm/page_alloc.c

  4647   * Heuristically get a page block in the system that is unused.
  4648   * It is possible that pages from the page block are used immediately 
after
  4649   * report_unused_page_block() returns. It is the caller's responsibility
  4650   * to either detect or prevent the use of such pages.
  4651   *
  4652   * The free list to check: 
zone->free_area[order].free_list[migratetype].
  4653   *
  4654   * If the caller supplied page block (i.e. **page) is on the free list, 
offer
  4655   * the next page block on the list to the caller. Otherwise, offer the 
first
  4656   * page block on the list.
  4657   *
  4658   * Return 0 when a page block is found on the caller specified free 
list.
  4659   */
  4660  int report_unused_page_block(struct zone *zone, unsigned int order,
  4661                               unsigned int migratetype, struct page 
**page)
  4662  {
> 4663          struct zone *this_zone;
  4664          struct list_head *this_list;
  4665          int ret = 0;
  4666          unsigned long flags;
  4667  
  4668          /* Sanity check */
  4669          if (zone == NULL || page == NULL || order >= MAX_ORDER ||
  4670              migratetype >= MIGRATE_TYPES)
  4671                  return -EINVAL;

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