mm: remove useless vma parameter to offset_il_node

While reading the code I found that offset_il_node() has a vm_area_struct
pointer parameter which is unused.

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Laurent Dufour <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/mempolicy.c

···
  * node in pol->v.nodes (starting from n=0), wrapping around if n exceeds the
  * number of present nodes.
  */
-static unsigned offset_il_node(struct mempolicy *pol,
-			       struct vm_area_struct *vma, unsigned long n)
+static unsigned offset_il_node(struct mempolicy *pol, unsigned long n)
 {
 	unsigned nnodes = nodes_weight(pol->v.nodes);
 	unsigned target;
···
 		BUG_ON(shift < PAGE_SHIFT);
 		off = vma->vm_pgoff >> (shift - PAGE_SHIFT);
 		off += (addr - vma->vm_start) >> shift;
-		return offset_il_node(pol, vma, off);
+		return offset_il_node(pol, off);
 	} else
 		return interleave_nodes(pol);
 }
···
 
 		pgoff = vma->vm_pgoff;
 		pgoff += (addr - vma->vm_start) >> PAGE_SHIFT;
-		polnid = offset_il_node(pol, vma, pgoff);
+		polnid = offset_il_node(pol, pgoff);
 		break;
 
 	case MPOL_PREFERRED: