Merge branch 'upstream-fixes'

4 files changed, 23 insertions, 8 deletions

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 67af4cea1e2..5643cfed6b0 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -954,7 +954,8 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
 		goto out;
 	}
 
-	err = do_migrate_pages(mm, &old, &new, MPOL_MF_MOVE);
+	err = do_migrate_pages(mm, &old, &new,
+		capable(CAP_SYS_ADMIN) ? MPOL_MF_MOVE_ALL : MPOL_MF_MOVE);
 out:
 	mmput(mm);
 	return err;
diff --git a/mm/nommu.c b/mm/nommu.c
index 99d21020ec9..4951f4786f2 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -53,7 +53,6 @@ DECLARE_RWSEM(nommu_vma_sem);
 struct vm_operations_struct generic_file_vm_ops = {
 };
 
-EXPORT_SYMBOL(vmalloc);
 EXPORT_SYMBOL(vfree);
 EXPORT_SYMBOL(vmalloc_to_page);
 EXPORT_SYMBOL(vmalloc_32);
@@ -205,6 +204,13 @@ void *vmalloc(unsigned long size)
 {
        return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
 }
+EXPORT_SYMBOL(vmalloc);
+
+void *vmalloc_node(unsigned long size, int node)
+{
+	return vmalloc(size);
+}
+EXPORT_SYMBOL(vmalloc_node);
 
 /*
  *	vmalloc_32  -  allocate virtually continguos memory (32bit addressable)
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 8123fad5a48..c86c737d243 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -302,7 +302,7 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order)
 {
 	struct mm_struct *mm = NULL;
 	task_t *p;
-	unsigned long points;
+	unsigned long points = 0;
 
 	if (printk_ratelimit()) {
 		printk("oom-killer: gfp_mask=0x%x, order=%d\n",
diff --git a/mm/rmap.c b/mm/rmap.c
index df2c41c2a9a..d8ce5ff6145 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -212,25 +212,33 @@ out:
  * through real pte's pointing to valid pages and then releasing
  * the page from the swap cache.
  *
- * Must hold page lock on page.
+ * Must hold page lock on page and mmap_sem of one vma that contains
+ * the page.
  */
 void remove_from_swap(struct page *page)
 {
 	struct anon_vma *anon_vma;
 	struct vm_area_struct *vma;
+	unsigned long mapping;
 
-	if (!PageAnon(page) || !PageSwapCache(page))
+	if (!PageSwapCache(page))
 		return;
 
-	anon_vma = page_lock_anon_vma(page);
-	if (!anon_vma)
+	mapping = (unsigned long)page->mapping;
+
+	if (!mapping || (mapping & PAGE_MAPPING_ANON) == 0)
 		return;
 
+	/*
+	 * We hold the mmap_sem lock. So no need to call page_lock_anon_vma.
+	 */
+	anon_vma = (struct anon_vma *) (mapping - PAGE_MAPPING_ANON);
+	spin_lock(&anon_vma->lock);
+
 	list_for_each_entry(vma, &anon_vma->head, anon_vma_node)
 		remove_vma_swap(vma, page);
 
 	spin_unlock(&anon_vma->lock);
-
 	delete_from_swap_cache(page);
 }
 EXPORT_SYMBOL(remove_from_swap);