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

kbuild test robot
2017-05-05T00:21:34Z

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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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