linux-kernel - [PATCH] MIPS: Do not flush tlb when setting pmd entry

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Message-Id: <1591177333-17833-1-git-send-email-maobibo@loongson.cn>
Date:   Wed,  3 Jun 2020 17:42:13 +0800
From:   Bibo Mao <maobibo@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] MIPS: Do not flush tlb when setting pmd entry

Function set_pmd_at is to set pmd entry, if tlb entry need to
be flushed, there exists pmdp_huge_clear_flush alike function
before set_pmd_at is called. So it is not necessary to call
flush_tlb_all in this function.

Signed-off-by: Bibo Mao <maobibo@...ngson.cn>
---
 arch/mips/mm/pgtable-64.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/mips/mm/pgtable-64.c b/arch/mips/mm/pgtable-64.c
index 6fd6e96..a236752 100644
--- a/arch/mips/mm/pgtable-64.c
+++ b/arch/mips/mm/pgtable-64.c
@@ -101,7 +101,6 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 		pmd_t *pmdp, pmd_t pmd)
 {
 	*pmdp = pmd;
-	flush_tlb_all();
 }
 
 void __init pagetable_init(void)
-- 
1.8.3.1