linux-kernel - [PATCH for 6.1.y] LoongArch: Fix build error due to backport

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Message-ID: <20250504021054.783045-1-chenhuacai@loongson.cn>
Date: Sun,  4 May 2025 10:10:54 +0800
From: Huacai Chen <chenhuacai@...ngson.cn>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sasha Levin <sashal@...nel.org>,
	Huacai Chen <chenhuacai@...nel.org>
Cc: Xuerui Wang <kernel@...0n.name>,
	stable@...r.kernel.org,
	loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Huacai Chen <chenhuacai@...ngson.cn>
Subject: [PATCH for 6.1.y] LoongArch: Fix build error due to backport

In 6.1 there is no pmdp_get() definition, so use *pmd directly, in order
to avoid such build error due to a recently backport:

arch/loongarch/mm/hugetlbpage.c: In function 'huge_pte_offset':                                                                                                                
arch/loongarch/mm/hugetlbpage.c:50:25: error: implicit declaration of
function 'pmdp_get'; did you mean 'ptep_get'?
[-Wimplicit-function-declaration]                          
   50 |         return pmd_none(pmdp_get(pmd)) ? NULL : (pte_t *) pmd;                                                                                                         
      |                         ^~~~~~~~                                                                                                                                       
      |                         ptep_get                            

Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
---
 arch/loongarch/mm/hugetlbpage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/loongarch/mm/hugetlbpage.c b/arch/loongarch/mm/hugetlbpage.c
index cf3b8785a921..70b4a51885c2 100644
--- a/arch/loongarch/mm/hugetlbpage.c
+++ b/arch/loongarch/mm/hugetlbpage.c
@@ -47,7 +47,7 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
 				pmd = pmd_offset(pud, addr);
 		}
 	}
-	return pmd_none(pmdp_get(pmd)) ? NULL : (pte_t *) pmd;
+	return pmd_none(*pmd) ? NULL : (pte_t *) pmd;
 }
 
 /*
-- 
2.47.1