From 936a5fe6e6148c0b3ea0d792b903847d9b9931a1 Mon Sep 17 00:00:00 2001
From: Andrea Arcangeli <aarcange@redhat.com>
Date: Thu, 13 Jan 2011 15:46:48 -0800
Subject: thp: kvm mmu transparent hugepage support

This should work for both hugetlbfs and transparent hugepages.

[akpm@linux-foundation.org: bring forward PageTransCompound() addition for bisectability]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/page-flags.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'include/linux/page-flags.h')

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 4835cae71047..907f1605926b 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -409,6 +409,18 @@ static inline void ClearPageCompound(struct page *page)
 
 #endif /* !PAGEFLAGS_EXTENDED */
 
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static inline int PageTransCompound(struct page *page)
+{
+	return PageCompound(page);
+}
+#else
+static inline int PageTransCompound(struct page *page)
+{
+	return 0;
+}
+#endif
+
 #ifdef CONFIG_MMU
 #define __PG_MLOCKED		(1 << PG_mlocked)
 #else
-- 
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