[PATCH] arm64/hugetlb: fix CMA gigantic page order for non-4K PAGE_SIZE

[Mike Kravetz]

For non-4K PAGE_SIZE configs, the largest gigantic huge page size is
CONT_PMD_SHIFT order.

Fixes: abb7962adc80 ("arm64/hugetlb: Reserve CMA areas for gigantic
pages on 16K and 64K configs")
Signed-off-by: Mike Kravetz <mike.kravetz at oracle.com>
Cc: <stable at vger.kernel.org>
---
 arch/arm64/mm/hugetlbpage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index 23505fc35324..a8158c948966 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -43,7 +43,7 @@ void __init arm64_hugetlb_cma_reserve(void)
 #ifdef CONFIG_ARM64_4K_PAGES
 	order = PUD_SHIFT - PAGE_SHIFT;
 #else
-	order = CONT_PMD_SHIFT + PMD_SHIFT - PAGE_SHIFT;
+	order = CONT_PMD_SHIFT - PAGE_SHIFT;
 #endif
 	/*
 	 * HugeTLB CMA reservation is required for gigantic
-- 
2.31.1