From 9a733dc4fbeec3f6d99645b845712b035e7440cf Mon Sep 17 00:00:00 2001
From: Pavel Kozlov <pavel.kozlov@synopsys.com>
Date: Wed, 13 Dec 2023 19:07:10 +0400
Subject: ARC: add hugetlb definitions

Add hugetlb definitions if THP enabled. ARC doesn't support
HugeTLB FS but it supports THP. Some kernel code such as pagemap
uses hugetlb definitions with THP.

This patch fixes ARC build issue (HPAGE_SIZE undeclared error) with
TRANSPARENT_HUGEPAGE enabled.

Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
---
 arch/arc/include/asm/hugepage.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'arch/arc')

diff --git a/arch/arc/include/asm/hugepage.h b/arch/arc/include/asm/hugepage.h
index ef8d4166370c..8a2441670a8f 100644
--- a/arch/arc/include/asm/hugepage.h
+++ b/arch/arc/include/asm/hugepage.h
@@ -10,6 +10,13 @@
 #include <linux/types.h>
 #include <asm-generic/pgtable-nopmd.h>
 
+/*
+ * Hugetlb definitions.
+ */
+#define HPAGE_SHIFT		PMD_SHIFT
+#define HPAGE_SIZE		(_AC(1, UL) << HPAGE_SHIFT)
+#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
+
 static inline pte_t pmd_pte(pmd_t pmd)
 {
 	return __pte(pmd_val(pmd));
-- 
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