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.

Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nitin Gupta <nigupta@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Link: http://lkml.kernel.org/r/20200623064544.25766-1-nigupta@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/compaction.c b/mm/compaction.c
index 544a98811c82f2d4c1023b9af116543a5e7ea1fb..ed8ea15116347a6a1fc22d3bd31002c4debb61f5 100644 (file)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -62,7 +62,7 @@ static const 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)