From b0208255da09a760ba4950e344ce76edd7fe4d17 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Mon, 8 Oct 2012 16:34:11 -0700
Subject: [PATCH] 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>
---
mm/hugetlb.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 993f7c1820a8a..59a0059b39e27 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;
--
2.39.5