omap2+: add drm device

[pandora-kernel.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 8f005e9..9a33a2b 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -790,6 +790,28 @@ pgtable_t get_pmd_huge_pte(struct mm_struct *mm)
        return pgtable;
 }
 
+void huge_pmd_set_accessed(struct mm_struct *mm,
+                          struct vm_area_struct *vma,
+                          unsigned long address,
+                          pmd_t *pmd, pmd_t orig_pmd,
+                          int dirty)
+{
+       pmd_t entry;
+       unsigned long haddr;
+
+       spin_lock(&mm->page_table_lock);
+       if (unlikely(!pmd_same(*pmd, orig_pmd)))
+               goto unlock;
+
+       entry = pmd_mkyoung(orig_pmd);
+       haddr = address & HPAGE_PMD_MASK;
+       if (pmdp_set_access_flags(vma, haddr, pmd, entry, dirty))
+               update_mmu_cache_pmd(vma, address, pmd);
+
+unlock:
+       spin_unlock(&mm->page_table_lock);
+}
+
 static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
                                        struct vm_area_struct *vma,
                                        unsigned long address,
@@ -903,7 +925,7 @@ 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, entry);
+                       update_mmu_cache(vma, address, pmd);
                ret |= VM_FAULT_WRITE;
                goto out_unlock;
        }
@@ -921,6 +943,8 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
                count_vm_event(THP_FAULT_FALLBACK);
                ret = do_huge_pmd_wp_page_fallback(mm, vma, address,
                                                   pmd, orig_pmd, page, haddr);
+               if (ret & VM_FAULT_OOM)
+                       split_huge_page(page);
                put_page(page);
                goto out;
        }
@@ -928,6 +952,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
 
        if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
                put_page(new_page);
+               split_huge_page(page);
                put_page(page);
                ret |= VM_FAULT_OOM;
                goto out;
@@ -950,7 +975,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
                pmdp_clear_flush_notify(vma, haddr, pmd);
                page_add_new_anon_rmap(new_page, vma, haddr);
                set_pmd_at(mm, haddr, pmd, entry);
-               update_mmu_cache(vma, address, entry);
+               update_mmu_cache(vma, address, pmd);
                page_remove_rmap(page);
                put_page(page);
                ret |= VM_FAULT_WRITE;
@@ -1968,7 +1993,7 @@ 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(vma, address, pmd);
        prepare_pmd_huge_pte(pgtable, mm);
        spin_unlock(&mm->page_table_lock);