Add a function to find a page block on the free list specified by the
caller. Pages from the page block may be used immediately after the
function returns. The caller is responsible for detecting or preventing
the use of such pages.
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Liang Li <liang.z.li@intel.com>
---
include/linux/mm.h | 5 +++
mm/page_alloc.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 96 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5d22e69..82361a6 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1841,6 +1841,11 @@ extern void free_area_init_node(int nid, unsigned long * zones_size,
unsigned long zone_start_pfn, unsigned long *zholes_size);
extern void free_initmem(void);
+#if IS_ENABLED(CONFIG_VIRTIO_BALLOON)
+extern int report_unused_page_block(struct zone *zone, unsigned int order,
+ unsigned int migratetype,
+ struct page **page);
+#endif
/*
* Free reserved pages within range [PAGE_ALIGN(start), end & PAGE_MASK)
* into the buddy system. The freed pages will be poisoned with pattern
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2c25de4..e554ab8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4615,6 +4615,97 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
show_swap_cache_info();
}
+#if IS_ENABLED(CONFIG_VIRTIO_BALLOON)
+
+/**
+ * Heuristically get a page block in the system that is unused.
+ * It is possible that pages from the page block are used immediately after
+ * report_unused_page_block() returns. It is the caller's responsibility
+ * to either detect or prevent the use of such pages.
+ *
+ * The free list to check: zone->free_area[order].free_list[migratetype].
+ *
+ * If the caller supplied page block (i.e. **page) is on the free list, offer
+ * the next page block on the list to the caller. Otherwise, offer the first
+ * page block on the list.
+ *
+ * Return 0 when a page block is found on the caller specified free list.
+ */
+int report_unused_page_block(struct zone *zone, unsigned int order,
+ unsigned int migratetype, struct page **page)
+{
+ struct zone *this_zone;
+ struct list_head *this_list;
+ int ret = 0;
+ unsigned long flags;
+
+ /* Sanity check */
+ if (zone == NULL || page == NULL || order >= MAX_ORDER ||
+ migratetype >= MIGRATE_TYPES)
+ return -EINVAL;
+
+ /* Zone validity check */
+ for_each_populated_zone(this_zone) {
+ if (zone == this_zone)
+ break;
+ }
+
+ /* Got a non-existent zone from the caller? */
+ if (zone != this_zone)
+ return -EINVAL;
+
+ spin_lock_irqsave(&this_zone->lock, flags);
+
+ this_list = &zone->free_area[order].free_list[migratetype];
+ if (list_empty(this_list)) {
+ *page = NULL;
+ ret = 1;
+ goto out;
+ }
+
+ /* The caller is asking for the first free page block on the list */
+ if ((*page) == NULL) {
+ *page = list_first_entry(this_list, struct page, lru);
+ ret = 0;
+ goto out;
+ }
+
+ /**
+ * The page block passed from the caller is not on this free list
+ * anymore (e.g. a 1MB free page block has been split). In this case,
+ * offer the first page block on the free list that the caller is
+ * asking for.
+ */
+ if (PageBuddy(*page) && order != page_order(*page)) {
+ *page = list_first_entry(this_list, struct page, lru);
+ ret = 0;
+ goto out;
+ }
+
+ /**
+ * The page block passed from the caller has been the last page block
+ * on the list.
+ */
+ if ((*page)->lru.next == this_list) {
+ *page = NULL;
+ ret = 1;
+ goto out;
+ }
+
+ /**
+ * Finally, fall into the regular case: the page block passed from the
+ * caller is still on the free list. Offer the next one.
+ */
+ *page = list_next_entry((*page), lru);
+ ret = 0;
+out:
+ spin_unlock_irqrestore(&this_zone->lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(report_unused_page_block);
+
+#endif
+
static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
{
zoneref->zone = zone;
--
2.7.4
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;
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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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