From: Nitin Gupta <nigupta@xxxxxxxxxx> Subject: 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. Link: http://lkml.kernel.org/r/20200623064544.25766-1-nigupta@xxxxxxxxxx Signed-off-by: Nitin Gupta <nigupta@xxxxxxxxxx> Reported-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/compaction.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/compaction.c~mm-proactive-compaction-fix +++ a/mm/compaction.c @@ -62,7 +62,7 @@ static const int HPAGE_FRAG_CHECK_INTERV */ #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) _
