From: Andrew Morton <akpm@linux-foundation.org>
Date: Mon, 8 Oct 2012 23:34:11 +0000 (-0700)
Subject: mm: document PageHuge somewhat
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7795912c257bc068445f1db429c94d6b4b6ee604;p=openwrt%2Fstaging%2Fblogic.git

mm: document PageHuge somewhat

Acked-by: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 993f7c1820a8..59a0059b39e2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -671,6 +671,11 @@ static void prep_compound_gigantic_page(struct page *page, unsigned long order)
 	}
 }
 
+/*
+ * PageHuge() only returns true for hugetlbfs pages, but not for normal or
+ * transparent huge pages.  See the PageTransHuge() documentation for more
+ * details.
+ */
 int PageHuge(struct page *page)
 {
 	compound_page_dtor *dtor;