linux-next: manual merge of the akpm tree with the tip tree

[Stephen Rothwell]

Hi Andrew,

Today's linux-next merge of the akpm tree got a conflict in
mm/mempolicy.c between commit 4d58c795f691 ("mm/mpol: Check for misplaced
page") from the tip tree and commit "mempolicy: fix refcount leak in
mpol_set_shared_policy()" from the akpm tree.

I fixed it up (see below) and can carry the fix as necessary (no action
is required).

-- 
Cheers,
Stephen Rothwell                    s...@canb.auug.org.au

diff --cc mm/mempolicy.c
index a0eec0e,1763418..0000000
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@@ -2174,82 -2157,12 +2174,88 @@@ mpol_shared_policy_lookup(struct shared
        return pol;
  }
  
 +/**
 + * mpol_misplaced - check whether current page node is valid in policy
 + *
 + * @page   - page to be checked
 + * @vma    - vm area where page mapped
 + * @addr   - virtual address where page mapped
 + *
 + * Lookup current policy node id for vma,addr and "compare to" page's
 + * node id.
 + *
 + * Returns:
 + *    -1      - not misplaced, page is in the right node
 + *    node    - node id where the page should be
 + *
 + * Policy determination "mimics" alloc_page_vma().
 + * Called from fault path where we know the vma and faulting address.
 + */
 +int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned 
long addr)
 +{
 +      struct mempolicy *pol;
 +      struct zone *zone;
 +      int curnid = page_to_nid(page);
 +      unsigned long pgoff;
 +      int polnid = -1;
 +      int ret = -1;
 +
 +      BUG_ON(!vma);
 +
 +      pol = get_vma_policy(current, vma, addr);
 +      if (!(pol->flags & MPOL_F_MOF))
 +              goto out;
 +
 +      switch (pol->mode) {
 +      case MPOL_INTERLEAVE:
 +              BUG_ON(addr >= vma->vm_end);
 +              BUG_ON(addr < vma->vm_start);
 +
 +              pgoff = vma->vm_pgoff;
 +              pgoff += (addr - vma->vm_start) >> PAGE_SHIFT;
 +              polnid = offset_il_node(pol, vma, pgoff);
 +              break;
 +
 +      case MPOL_PREFERRED:
 +              if (pol->flags & MPOL_F_LOCAL)
 +                      polnid = numa_node_id();
 +              else
 +                      polnid = pol->v.preferred_node;
 +              break;
 +
 +      case MPOL_BIND:
 +              /*
 +               * allows binding to multiple nodes.
 +               * use current page if in policy nodemask,
 +               * else select nearest allowed node, if any.
 +               * If no allowed nodes, use current [!misplaced].
 +               */
 +              if (node_isset(curnid, pol->v.nodes))
 +                      goto out;
 +              (void)first_zones_zonelist(
 +                              node_zonelist(numa_node_id(), GFP_HIGHUSER),
 +                              gfp_zone(GFP_HIGHUSER),
 +                              &pol->v.nodes, &zone);
 +              polnid = zone->node;
 +              break;
 +
 +      default:
 +              BUG();
 +      }
 +      if (curnid != polnid)
 +              ret = polnid;
 +out:
 +      mpol_cond_put(pol);
 +
 +      return ret;
 +}
 +
+ static void sp_free(struct sp_node *n)
+ {
+       mpol_put(n->policy);
+       kmem_cache_free(sn_cache, n);
+ }
+ 
  static void sp_delete(struct shared_policy *sp, struct sp_node *n)
  {
        pr_debug("deleting %lx-l%lx\n", n->start, n->end);

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