migration: migrate_vmas should check "vma"

migrate_vmas() should check "vma" not "vma->vm_next" for for-loop condition.

Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/migrate.c b/mm/migrate.c
index 2bb4e1d63520..a9eff3f092f6 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1129,7 +1129,7 @@ int migrate_vmas(struct mm_struct *mm, const nodemask_t *to,
         struct vm_area_struct *vma;
         int err = 0;
 
-        for(vma = mm->mmap; vma->vm_next && !err; vma = vma->vm_next) {
+        for (vma = mm->mmap; vma && !err; vma = vma->vm_next) {
                 if (vma->vm_ops && vma->vm_ops->migrate) {
                         err = vma->vm_ops->migrate(vma, to, from, flags);
                         if (err)