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From:   Will Deacon <will.deacon@arm.com>
To:     linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc:     cpandya@codeaurora.org, toshi.kani@hpe.com, tglx@linutronix.de,
        mhocko@suse.com, akpm@linux-foundation.org,
        Will Deacon <will.deacon@arm.com>
Subject: [PATCH 2/5] arm64: mmu: Drop pXd_present() checks from pXd_free_pYd_table()
Date:   Wed, 12 Sep 2018 11:26:11 +0100
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Now that the core code checks this for us, we don't need to do it in the
backend.

Cc: Chintan Pandya <cpandya@codeaurora.org>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
 arch/arm64/mm/mmu.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 8080c9f489c3..0dcb3354d6dd 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -985,10 +985,8 @@ int pmd_free_pte_page(pmd_t *pmdp, unsigned long addr)
 
 	pmd = READ_ONCE(*pmdp);
 
-	if (!pmd_present(pmd))
-		return 1;
 	if (!pmd_table(pmd)) {
-		VM_WARN_ON(!pmd_table(pmd));
+		VM_WARN_ON(1);
 		return 1;
 	}
 
@@ -1008,10 +1006,8 @@ int pud_free_pmd_page(pud_t *pudp, unsigned long addr)
 
 	pud = READ_ONCE(*pudp);
 
-	if (!pud_present(pud))
-		return 1;
 	if (!pud_table(pud)) {
-		VM_WARN_ON(!pud_table(pud));
+		VM_WARN_ON(1);
 		return 1;
 	}
 
-- 
2.1.4