mm: move_pages: no need to set pp->page to ZERO_PAGE(0) by default

pp->page is never used when not set to the right page, so there is no need
to set it to ZERO_PAGE(0) by default.

Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/migrate.c b/mm/migrate.c
index 0a75716..6051030 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -848,12 +848,6 @@ static int do_move_page_to_node_array(struct mm_struct *mm,
                struct vm_area_struct *vma;
                struct page *page;
 
-               /*
-                * A valid page pointer that will not match any of the
-                * pages that will be moved.
-                */
-               pp->page = ZERO_PAGE(0);
-
                err = -EFAULT;
                vma = find_vma(mm, pp->addr);
                if (!vma || !vma_migratable(vma))