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mm: fix dubious code in __count_immobile_pages() 

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

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Namhyung Kim 2011-02-25 14:44:25 -08:00 committed by Linus Torvalds
parent a2d6d2fa90
commit 29723fccc8
1 changed files with 2 additions and 3 deletions
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5
mm/page_alloc.c
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@ -5376,10 +5376,9 @@ __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))