Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

[~andy/linux] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 08a943b9cf95e01e55728f2c4d6919ae07c53fc5..a863af26c79c0190f378c36ac4e680add06f700a 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -900,7 +900,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
                entry = pmd_mkyoung(orig_pmd);
                entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
                if (pmdp_set_access_flags(vma, haddr, pmd, entry,  1))
-                       update_mmu_cache(vma, address, pmd);
+                       update_mmu_cache_pmd(vma, address, pmd);
                ret |= VM_FAULT_WRITE;
                goto out_unlock;
        }
@@ -956,7 +956,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
                pmdp_clear_flush(vma, haddr, pmd);
                page_add_new_anon_rmap(new_page, vma, haddr);
                set_pmd_at(mm, haddr, pmd, entry);
-               update_mmu_cache(vma, address, pmd);
+               update_mmu_cache_pmd(vma, address, pmd);
                page_remove_rmap(page);
                put_page(page);
                ret |= VM_FAULT_WRITE;
@@ -971,11 +971,12 @@ out_unlock:
        return ret;
 }
 
-struct page *follow_trans_huge_pmd(struct mm_struct *mm,
+struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
                                   unsigned long addr,
                                   pmd_t *pmd,
                                   unsigned int flags)
 {
+       struct mm_struct *mm = vma->vm_mm;
        struct page *page = NULL;
 
        assert_spin_locked(&mm->page_table_lock);
@@ -998,6 +999,14 @@ struct page *follow_trans_huge_pmd(struct mm_struct *mm,
                _pmd = pmd_mkyoung(pmd_mkdirty(*pmd));
                set_pmd_at(mm, addr & HPAGE_PMD_MASK, pmd, _pmd);
        }
+       if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) {
+               if (page->mapping && trylock_page(page)) {
+                       lru_add_drain();
+                       if (page->mapping)
+                               mlock_vma_page(page);
+                       unlock_page(page);
+               }
+       }
        page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT;
        VM_BUG_ON(!PageCompound(page));
        if (flags & FOLL_GET)
@@ -1015,9 +1024,10 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
        if (__pmd_trans_huge_lock(pmd, vma) == 1) {
                struct page *page;
                pgtable_t pgtable;
+               pmd_t orig_pmd;
                pgtable = pgtable_trans_huge_withdraw(tlb->mm);
-               page = pmd_page(*pmd);
-               pmd_clear(pmd);
+               orig_pmd = pmdp_get_and_clear(tlb->mm, addr, pmd);
+               page = pmd_page(orig_pmd);
                tlb_remove_pmd_tlb_entry(tlb, pmd, addr);
                page_remove_rmap(page);
                VM_BUG_ON(page_mapcount(page) < 0);
@@ -2032,7 +2042,7 @@ static void collapse_huge_page(struct mm_struct *mm,
        BUG_ON(!pmd_none(*pmd));
        page_add_new_anon_rmap(new_page, vma, address);
        set_pmd_at(mm, address, pmd, _pmd);
-       update_mmu_cache(vma, address, pmd);
+       update_mmu_cache_pmd(vma, address, pmd);
        pgtable_trans_huge_deposit(mm, pgtable);
        spin_unlock(&mm->page_table_lock);