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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 3/5] x86: pgtable: Drop pXd_none() checks from pXd_free_pYd_table()
Date: Wed, 12 Sep 2018 11:26:12 +0100	[thread overview]
Message-ID: <1536747974-25875-4-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1536747974-25875-1-git-send-email-will.deacon@arm.com>

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/x86/mm/pgtable.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index ae394552fb94..b4919c44a194 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -796,9 +796,6 @@ int pud_free_pmd_page(pud_t *pud, unsigned long addr)
 	pte_t *pte;
 	int i;
 
-	if (pud_none(*pud))
-		return 1;
-
 	pmd = (pmd_t *)pud_page_vaddr(*pud);
 	pmd_sv = (pmd_t *)__get_free_page(GFP_KERNEL);
 	if (!pmd_sv)
@@ -840,9 +837,6 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
 {
 	pte_t *pte;
 
-	if (pmd_none(*pmd))
-		return 1;
-
 	pte = (pte_t *)pmd_page_vaddr(*pmd);
 	pmd_clear(pmd);
 
-- 
2.1.4

  parent reply	other threads:[~2018-09-12 10:26 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-12 10:26 [PATCH 0/5] Clean up huge vmap and ioremap code Will Deacon
2018-09-12 10:26 ` [PATCH 1/5] ioremap: Rework pXd_free_pYd_page() API Will Deacon
2018-09-14 20:36   ` Kani, Toshi
2018-09-14 21:10     ` Kani, Toshi
2018-09-17 11:33       ` Will Deacon
2018-09-17 18:38         ` Kani, Toshi
2018-09-12 10:26 ` [PATCH 2/5] arm64: mmu: Drop pXd_present() checks from pXd_free_pYd_table() Will Deacon
2018-09-12 10:26 ` Will Deacon [this message]
2018-09-14 20:37   ` [PATCH 3/5] x86: pgtable: Drop pXd_none() " Kani, Toshi
2018-09-17 11:33     ` Will Deacon
2018-09-17 18:43       ` Kani, Toshi
2018-09-12 10:26 ` [PATCH 4/5] lib/ioremap: Ensure phys_addr actually corresponds to a physical address Will Deacon
2018-09-12 15:09   ` Sean Christopherson
2018-09-12 16:39     ` Will Deacon
2018-09-12 17:14       ` Sean Christopherson
2018-09-12 10:26 ` [PATCH 5/5] lib/ioremap: Ensure break-before-make is used for huge p4d mappings Will Deacon
2018-09-17 18:55   ` Kani, Toshi

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