diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8439d2a04f2d..947a7e96f91d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5565,6 +5565,17 @@ __count_immobile_pages(struct zone *zone, struct page *page, int count) bool is_pageblock_removable_nolock(struct page *page) { struct zone *zone = page_zone(page); + unsigned long pfn = page_to_pfn(page); + + /* + * We have to be careful here because we are iterating over memory + * sections which are not zone aware so we might end up outside of + * the zone but still within the section. + */ + if (!zone || zone->zone_start_pfn > pfn || + zone->zone_start_pfn + zone->spanned_pages <= pfn) + return false; + return __count_immobile_pages(zone, page, 0); } |