5 files changed, 6 insertions, 50 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ffbdfc86aedf..4c9e6bbf3772 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1039,7 +1039,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
                 page = alloc_buddy_huge_page(h, vma, addr);
                 if (!page) {
                         hugetlb_put_quota(inode->i_mapping, chg);
-                        return ERR_PTR(-VM_FAULT_OOM);
+                        return ERR_PTR(-VM_FAULT_SIGBUS);
                 }
         }
 
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6c755de385f7..8a79a6f0f029 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1601,7 +1601,6 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
                          * There is a small race that "from" or "to" can be
                          * freed by rmdir, so we use css_tryget().
                          */
-                        rcu_read_lock();
                         from = mc.from;
                         to = mc.to;
                         if (from && css_tryget(&from->css)) {
@@ -1622,7 +1621,6 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
                                         do_continue = (to == mem_over_limit);
                                 css_put(&to->css);
                         }
-                        rcu_read_unlock();
                         if (do_continue) {
                                 DEFINE_WAIT(wait);
                                 prepare_to_wait(&mc.waitq, &wait,
diff --git a/mm/mlock.c b/mm/mlock.c
index 8f4e2dfceec1..3f82720e0515 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -607,44 +607,3 @@ void user_shm_unlock(size_t size, struct user_struct *user)
         spin_unlock(&shmlock_user_lock);
         free_uid(user);
 }
-
-int account_locked_memory(struct mm_struct *mm, struct rlimit *rlim,
-                          size_t size)
-{
-        unsigned long lim, vm, pgsz;
-        int error = -ENOMEM;
-
-        pgsz = PAGE_ALIGN(size) >> PAGE_SHIFT;
-
-        down_write(&mm->mmap_sem);
-
-        lim = ACCESS_ONCE(rlim[RLIMIT_AS].rlim_cur) >> PAGE_SHIFT;
-        vm   = mm->total_vm + pgsz;
-        if (lim < vm)
-                goto out;
-
-        lim = ACCESS_ONCE(rlim[RLIMIT_MEMLOCK].rlim_cur) >> PAGE_SHIFT;
-        vm   = mm->locked_vm + pgsz;
-        if (lim < vm)
-                goto out;
-
-        mm->total_vm  += pgsz;
-        mm->locked_vm += pgsz;
-
-        error = 0;
- out:
-        up_write(&mm->mmap_sem);
-        return error;
-}
-
-void refund_locked_memory(struct mm_struct *mm, size_t size)
-{
-        unsigned long pgsz = PAGE_ALIGN(size) >> PAGE_SHIFT;
-
-        down_write(&mm->mmap_sem);
-
-        mm->total_vm  -= pgsz;
-        mm->locked_vm -= pgsz;
-
-        up_write(&mm->mmap_sem);
-}
diff --git a/mm/rmap.c b/mm/rmap.c
index 07fc94758799..0feeef860a8f 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -336,14 +336,13 @@ vma_address(struct page *page, struct vm_area_struct *vma)
 
 /*
  * At what user virtual address is page expected in vma?
- * checking that the page matches the vma.
+ * Caller should check the page is actually part of the vma.
  */
 unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
 {
-        if (PageAnon(page)) {
-                if (vma->anon_vma != page_anon_vma(page))
-                        return -EFAULT;
-        } else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) {
+        if (PageAnon(page))
+                ;
+        else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) {
                 if (!vma->vm_file ||
                     vma->vm_file->f_mapping != page->mapping)
                         return -EFAULT;
diff --git a/mm/slub.c b/mm/slub.c
index 7d6c8b1ccf63..d2a54fe71ea2 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2153,7 +2153,7 @@ static int init_kmem_cache_nodes(struct kmem_cache *s, gfp_t gfpflags)
         int local_node;
 
         if (slab_state >= UP && (s < kmalloc_caches ||
-                        s > kmalloc_caches + KMALLOC_CACHES))
+                        s >= kmalloc_caches + KMALLOC_CACHES))
                 local_node = page_to_nid(virt_to_page(s));
         else
                 local_node = 0;