linux-kernel - [PATCH] mm: Fix compile error due to COMPACTION_HPAGE

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Date:   Mon, 22 Jun 2020 23:45:44 -0700
From:   Nitin Gupta <nigupta@...dia.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     Nitin Gupta <ngupta@...ingupta.dev>,
        Nitin Gupta <nigupta@...dia.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: Fix compile error due to COMPACTION_HPAGE_ORDER

Fix compile error when COMPACTION_HPAGE_ORDER is assigned
to HUGETLB_PAGE_ORDER. The correct way to check if this
constant is defined is to check for CONFIG_HUGETLBFS.

Signed-off-by: Nitin Gupta <nigupta@...dia.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Reported-by: Nathan Chancellor <natechancellor@...il.com>
Tested-by: Nathan Chancellor <natechancellor@...il.com>
---
 mm/compaction.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 45fd24a0ea0b..02963ffb9e70 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -62,7 +62,7 @@ static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC = 500;
  */
 #if defined CONFIG_TRANSPARENT_HUGEPAGE
 #define COMPACTION_HPAGE_ORDER	HPAGE_PMD_ORDER
-#elif defined HUGETLB_PAGE_ORDER
+#elif defined CONFIG_HUGETLBFS
 #define COMPACTION_HPAGE_ORDER	HUGETLB_PAGE_ORDER
 #else
 #define COMPACTION_HPAGE_ORDER	(PMD_SHIFT - PAGE_SHIFT)
-- 
2.27.0