linux-kernel - [PATCH] MIPS: fix pmd

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Message-Id: <1653971769-14152-1-git-send-email-zhanghongchen@loongson.cn>
Date:   Tue, 31 May 2022 12:36:09 +0800
From:   Hongchen Zhang <zhanghongchen@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Zhaolong Zhang <zhangzl2013@....com>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hongchen Zhang <zhanghongchen@...ngson.cn>
Subject: [PATCH] MIPS: fix pmd_mkinvalid

pmd_mkinvalid should not clear dirty flag,otherwise the pmd
dirty flag,it's ok to just clear _PAGE_VALID.

Signed-off-by: Hongchen Zhang <zhanghongchen@...ngson.cn>
---
 arch/mips/include/asm/pgtable.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 374c632..d30a186 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -698,7 +698,7 @@ static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
 
 static inline pmd_t pmd_mkinvalid(pmd_t pmd)
 {
-	pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY);
+	pmd_val(pmd) &= ~_PAGE_VALID;
 
 	return pmd;
 }
-- 
1.8.3.1