[PATCH] mm: fix dubious code in __count_immobile_pages()

[Namhyung Kim]

When pfn_valid_within() failed 'iter' was incremented twice.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
 mm/page_alloc.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e8b02771ccea..bf83d1c1d648 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5380,10 +5380,9 @@ __count_immobile_pages(struct zone *zone, struct page *page, int count)
 	for (found = 0, iter = 0; iter < pageblock_nr_pages; iter++) {
 		unsigned long check = pfn + iter;
 
-		if (!pfn_valid_within(check)) {
-			iter++;
+		if (!pfn_valid_within(check))
 			continue;
-		}
+
 		page = pfn_to_page(check);
 		if (!page_count(page)) {
 			if (PageBuddy(page))
-- 
1.7.4

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