diff options
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 32630f1b1ee1..90f92c53476f 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1226,19 +1226,22 @@ void page_add_anon_rmap(struct page *page, } /** - * page_add_new_anon_rmap - add pte mapping to a new anonymous page + * page_add_new_anon_rmap - add mapping to a new anonymous page * @page: the page to add the mapping to * @vma: the vm area in which the mapping is added * @address: the user virtual address mapped - * @compound: charge the page as compound or small page + * + * If it's a compound page, it is accounted as a compound page. As the page + * is new, it's assume to get mapped exclusively by a single process. * * Same as page_add_anon_rmap but must only be called on *new* pages. * This means the inc-and-test can be bypassed. * Page does not have to be locked. */ void page_add_new_anon_rmap(struct page *page, - struct vm_area_struct *vma, unsigned long address, bool compound) + struct vm_area_struct *vma, unsigned long address) { + const bool compound = PageCompound(page); int nr = compound ? thp_nr_pages(page) : 1; VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma); @@ -1251,8 +1254,6 @@ void page_add_new_anon_rmap(struct page *page, __mod_lruvec_page_state(page, NR_ANON_THPS, nr); } else { - /* Anon THP always mapped first with PMD */ - VM_BUG_ON_PAGE(PageTransCompound(page), page); /* increment count (starts at -1) */ atomic_set(&page->_mapcount, 0); } |