diff options
| -rw-r--r-- | mm/memory.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/mm/memory.c b/mm/memory.c index a7bf87cf2ba0..48b008b01699 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1326,20 +1326,19 @@ static inline bool should_zap_cows(struct zap_details *details) /* * We set details->zap_mapping when we want to unmap shared but keep private - * pages. Return true if skip zapping this page, false otherwise. + * pages. Return true if we should zap this page, false otherwise. */ -static inline bool -zap_skip_check_mapping(struct zap_details *details, struct page *page) +static inline bool should_zap_page(struct zap_details *details, struct page *page) { /* If we can make a decision without *page.. */ if (should_zap_cows(details)) - return false; + return true; /* E.g. the caller passes NULL for the case of a zero page */ if (!page) - return false; + return true; - return details->zap_mapping != page_rmapping(page); + return details->zap_mapping == page_rmapping(page); } static unsigned long zap_pte_range(struct mmu_gather *tlb, @@ -1374,7 +1373,7 @@ again: struct page *page; page = vm_normal_page(vma, addr, ptent); - if (unlikely(zap_skip_check_mapping(details, page))) + if (unlikely(!should_zap_page(details, page))) continue; ptent = ptep_get_and_clear_full(mm, addr, pte, tlb->fullmm); @@ -1408,7 +1407,7 @@ again: is_device_exclusive_entry(entry)) { struct page *page = pfn_swap_entry_to_page(entry); - if (unlikely(zap_skip_check_mapping(details, page))) + if (unlikely(!should_zap_page(details, page))) continue; pte_clear_not_present_full(mm, addr, pte, tlb->fullmm); rss[mm_counter(page)]--; @@ -1429,7 +1428,7 @@ again: struct page *page; page = pfn_swap_entry_to_page(entry); - if (zap_skip_check_mapping(details, page)) + if (!should_zap_page(details, page)) continue; rss[mm_counter(page)]--; } else if (is_hwpoison_entry(entry)) { |