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Subject: Re: [PATCH v10 4/6] mm: function to offer a page block on the free list
On Fri, May 05, 2017 at 08:21:34AM +0800, kbuild test robot wrote:
> 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
the issue is actually aboe this line: it is:
/**
which is reserved for kernel-doc.
Either format properly for kernel-doc, or use simple /*
to start comments.
> 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;
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
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