From patchwork Fri Jan 3 18:44:11 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Brodsky X-Patchwork-Id: 13925809 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B807FE77188 for ; Fri, 3 Jan 2025 18:48:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=e6QU1c9I3y+Fx/bZr4mLsWiaM9PjrQzE1xWqXMnn8qY=; b=fCcy7znWuEggXi 2r22KzOvgkNdCcGUS3mN7YeYLvEs7QBD2IlYChsuvKQZENFgh4vdmWOEJE0MWAYXZRLSoxrq9i0EU /RKArlzDkjHUOTapdiUVBFvGQ8tEtGw4YFSEWjSAxo0B/2K+vK3YcAQoMJHFx+pGaucMUa/q//J08 J52JWkCLa3iBp2aPk1aYqZW+ys2K74eqPRx2fCxZVK25IuQAYJcSxytMKlBHxq0TVpRfopSrX3x9h ZQfVcN1BZ67NQXOEpY8oF397iL2IU/w62T8BW+7GZzhsOPcglS3QpputAkNHUpozUm9hUOx0z+nyh 3WTXoA40m7W/uwwF67Lw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tTmiR-0000000DkYG-2CHl; Fri, 03 Jan 2025 18:48:11 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tTmf0-0000000DjNb-1jzB; Fri, 03 Jan 2025 18:44:39 +0000 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 ED50C1C14; Fri, 3 Jan 2025 10:45:05 -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 B7C5C3F673; Fri, 3 Jan 2025 10:44:33 -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 , Qi Zheng , 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 v2 2/6] parisc: mm: Ensure pagetable_pmd_[cd]tor are called Date: Fri, 3 Jan 2025 18:44:11 +0000 Message-ID: <20250103184415.2744423-3-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20250103184415.2744423-1-kevin.brodsky@arm.com> References: <20250103184415.2744423-1-kevin.brodsky@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250103_104438_493326_D4B5A914 X-CRM114-Status: GOOD ( 11.75 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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. Acked-by: Dave Hansen 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