From patchwork Thu Dec 19 16:44:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Brodsky X-Patchwork-Id: 13915278 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EE12819C56D; Thu, 19 Dec 2024 16:46:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734626781; cv=none; b=fCmn83UasbDD6IidrylJ3GLWGc6tloO3s5zqnG3VN08TqBHIYhgqFzNvJcDWq7telS/IQ6OQIJoKNROpZm9PgucS0TL02BvK5468Bg9R7qILsIi6uflCGQqcIXxODXgftTHLGL4ZyMr/ccdCBUdxcKXEbIw4KDOrUOT3cqs1qZI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734626781; c=relaxed/simple; bh=7k73V98UoXYdW11oOcO0pNm8HlnYRmxZb3m4FQQZzbk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b0zcaRvPwAvvOL7KszWluxY6KxSK/xY5mgGWG8uduLaWmHz/a46KO8C3ZwIFhRUvkwzejc+XQoEZ4NpulZpG7fwGT2xwZNsKRqq3o6nMWPk9qIWALJoDiLtS6jSSZuWZSCThwuIewzeXS8Z0bGxbeEHowOKXqS8hbNX1MSjt1UM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 90DDF1480; Thu, 19 Dec 2024 08:46:47 -0800 (PST) Received: from e123572-lin.arm.com (e123572-lin.cambridge.arm.com [10.1.194.54]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 90EAC3F58B; Thu, 19 Dec 2024 08:46:15 -0800 (PST) From: Kevin Brodsky To: linux-mm@kvack.org Cc: Kevin Brodsky , Andrew Morton , Catalin Marinas , Dave Hansen , Linus Walleij , Andy Lutomirski , Peter Zijlstra , "Mike Rapoport (IBM)" , Ryan Roberts , Thomas Gleixner , Will Deacon , Matthew Wilcox , linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, loongarch@lists.linux.dev, x86@kernel.org Subject: [PATCH 02/10] parisc: mm: Ensure pagetable_pmd_[cd]tor are called Date: Thu, 19 Dec 2024 16:44:17 +0000 Message-ID: <20241219164425.2277022-3-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241219164425.2277022-1-kevin.brodsky@arm.com> References: <20241219164425.2277022-1-kevin.brodsky@arm.com> Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The implementation of pmd_{alloc_one,free} on parisc requires a non-zero allocation order, but is completely standard aside from that. Let's reuse the generic implementation of pmd_alloc_one(). Explicit zeroing is not needed as GFP_PGTABLE_KERNEL includes __GFP_ZERO. The generic pmd_free() can handle higher allocation orders so we don't need to define our own. These changes ensure that pagetable_pmd_[cd]tor are called, improving the accounting of page table pages. Signed-off-by: Kevin Brodsky --- arch/parisc/include/asm/pgalloc.h | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index e3e142b1c5c5..3e8dbd79670b 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -11,7 +11,6 @@ #include #define __HAVE_ARCH_PMD_ALLOC_ONE -#define __HAVE_ARCH_PMD_FREE #define __HAVE_ARCH_PGD_FREE #include @@ -46,17 +45,19 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) { - pmd_t *pmd; + struct ptdesc *ptdesc; + gfp_t gfp = GFP_PGTABLE_USER; - pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_TABLE_ORDER); - if (likely(pmd)) - memset ((void *)pmd, 0, PAGE_SIZE << PMD_TABLE_ORDER); - return pmd; -} - -static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) -{ - free_pages((unsigned long)pmd, PMD_TABLE_ORDER); + if (mm == &init_mm) + gfp = GFP_PGTABLE_KERNEL; + ptdesc = pagetable_alloc(gfp, PMD_TABLE_ORDER); + if (!ptdesc) + return NULL; + if (!pagetable_pmd_ctor(ptdesc)) { + pagetable_free(ptdesc); + return NULL; + } + return ptdesc_address(ptdesc); } #endif