commit 0753ba01 (mm: revert "oom: move oom_adj value") reverted some

regression patch. but it didn't revert one oom retrieved driver patch.

Then, it made build error to the driver. This reverts commit
a6a9f81c too and fixes the build error.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Greg KH <greg@kroah.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/staging/android/lowmemorykiller.c

@@ -99,21 +99,19 @@ static int lowmem_shrink(int nr_to_scan, gfp_t gfp_mask)
 
 	read_lock(&tasklist_lock);
 	for_each_process(p) {
-		struct mm_struct *mm;
 		int oom_adj;
 
 		task_lock(p);
-		mm = p->mm;
-		if (!mm) {
+		if (!p->mm) {
 			task_unlock(p);
 			continue;
 		}
-		oom_adj = mm->oom_adj;
+		oom_adj = p->oomkilladj;
 		if (oom_adj < min_adj) {
 			task_unlock(p);
 			continue;
 		}
-		tasksize = get_mm_rss(mm);
+		tasksize = get_mm_rss(p->mm);
 		task_unlock(p);
 		if (tasksize <= 0)
 			continue;