From: Brice Goglin <Brice.Goglin@inria.fr>
Date: Tue, 6 Jan 2009 22:38:58 +0000 (-0800)
Subject: mm: move_pages: no need to set pp->page to ZERO_PAGE(0) by default
X-Git-Tag: accepted/tizen/common/20141203.182822~18221
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5bd1455c239672081d0e7f086e899b8cbc7a9844;p=platform%2Fkernel%2Flinux-arm64.git

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
--- 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))