[patch 012/101] mm: update the comment in __isolate_free_page

[patch 012/101] mm: update the comment in __isolate_free_page

[akpm]

From: zhong jiang <zhongjiang@huawei.com>
Subject: mm: update the comment in __isolate_free_page

We need to assure the comment is consistent with the code.

[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/1466171914-21027-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff -puN mm/page_alloc.c~mm-update-the-comment-in-__isolate_free_page mm/page_alloc.c
--- a/mm/page_alloc.c~mm-update-the-comment-in-__isolate_free_page
+++ a/mm/page_alloc.c
@@ -2517,7 +2517,10 @@ int __isolate_free_page(struct page *pag
 	zone->free_area[order].nr_free--;
 	rmv_page_order(page);
 
-	/* Set the pageblock if the isolated page is at least a pageblock */
+	/*
+	 * Set the pageblock if the isolated page is at least half of a
+	 * pageblock
+	 */
 	if (order >= pageblock_order - 1) {
 		struct page *endpage = page + (1 << order) - 1;
 		for (; page < endpage; page += pageblock_nr_pages) {
_