From patchwork Wed May 24 11:54:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Punit Agrawal X-Patchwork-Id: 9745837 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 03FEA60209 for ; Wed, 24 May 2017 11:56:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E4FF728942 for ; Wed, 24 May 2017 11:56:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D95D428963; Wed, 24 May 2017 11:56:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6DC7B28942 for ; Wed, 24 May 2017 11:56:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=dGckCC5z8Xda5HZjqPanf9I5otYOTFyn1L7ux+dY6gE=; b=EswhIzLtjhv/FJN7jMimQOSlL6 vhlXSmIbJ0iQGONzzVMhxMjcpn15i6K1rwjbo3U4R37HJ/1j9yUMoZHpSkU7KSWtKOk672EoQmJpk KRV4LFphv01ahssx0vfeiH+QKaIoAP13z+rc14yBTIwoVJSCKBcYiX6tkO9sqylgx2U25HxbHTZC0 9yNtu6xd2YKuG1J8crjpHxVEeON1u7IWMlSeJ1o/Stu3oWdz9AB7Wl9o7s5ddNUiZ4s6/k1oHU80r XVaB+6RsrqBGzUdm4dlQRGfIT8vHZbDRtrnleyekHVfM+hQscMCu6Kym+UQVOUv4Nr4f/y08lLwVn NXQjP9gA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dDUtV-00021s-Kv; Wed, 24 May 2017 11:56:01 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dDUt5-0001TM-MO for linux-arm-kernel@lists.infradead.org; Wed, 24 May 2017 11:55:49 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 01D78AD7; Wed, 24 May 2017 04:55:16 -0700 (PDT) Received: from localhost (e105922-lin.cambridge.arm.com [10.1.207.56]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C48C33F578; Wed, 24 May 2017 04:55:15 -0700 (PDT) From: Punit Agrawal To: akpm@linux-foundation.org Subject: [PATCH v4 2/8] arm64: hugetlb: Remove spurious calls to huge_ptep_offset Date: Wed, 24 May 2017 12:54:03 +0100 Message-Id: <20170524115409.31309-3-punit.agrawal@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170524115409.31309-1-punit.agrawal@arm.com> References: <20170524115409.31309-1-punit.agrawal@arm.com> X-ARM-No-Footer: FoSSMail X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170524_045535_932521_243B9FE2 X-CRM114-Status: GOOD ( 10.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, linux-arch@vger.kernel.org, David Woods , Steve Capper , catalin.marinas@arm.com, Punit Agrawal , will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Steve Capper We don't need to call huge_ptep_offset as our accessors are already supplied with the pte_t *. This patch removes those spurious calls. Cc: David Woods Signed-off-by: Steve Capper [ Resolved rebase conflicts due to patch re-ordering ] Signed-off-by: Punit Agrawal --- arch/arm64/mm/hugetlbpage.c | 37 ++++++++++++++----------------------- 1 file changed, 14 insertions(+), 23 deletions(-) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 710bf935a473..f89aa8fa5855 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -183,21 +183,19 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, if (pte_cont(*ptep)) { int ncontig, i; size_t pgsize; - pte_t *cpte; bool is_dirty = false; - cpte = huge_pte_offset(mm, addr); - ncontig = find_num_contig(mm, addr, cpte, &pgsize); + ncontig = find_num_contig(mm, addr, ptep, &pgsize); /* save the 1st pte to return */ - pte = ptep_get_and_clear(mm, addr, cpte); + pte = ptep_get_and_clear(mm, addr, ptep); for (i = 1, addr += pgsize; i < ncontig; ++i, addr += pgsize) { /* * If HW_AFDBM is enabled, then the HW could * turn on the dirty bit for any of the page * in the set, so check them all. */ - ++cpte; - if (pte_dirty(ptep_get_and_clear(mm, addr, cpte))) + ++ptep; + if (pte_dirty(ptep_get_and_clear(mm, addr, ptep))) is_dirty = true; } if (is_dirty) @@ -213,8 +211,6 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte, int dirty) { - pte_t *cpte; - if (pte_cont(pte)) { int ncontig, i, changed = 0; size_t pgsize = 0; @@ -224,12 +220,11 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma, __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte)); - cpte = huge_pte_offset(vma->vm_mm, addr); - pfn = pte_pfn(*cpte); - ncontig = find_num_contig(vma->vm_mm, addr, cpte, + pfn = pte_pfn(pte); + ncontig = find_num_contig(vma->vm_mm, addr, ptep, &pgsize); - for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) { - changed |= ptep_set_access_flags(vma, addr, cpte, + for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize) { + changed |= ptep_set_access_flags(vma, addr, ptep, pfn_pte(pfn, hugeprot), dirty); @@ -246,13 +241,11 @@ void huge_ptep_set_wrprotect(struct mm_struct *mm, { if (pte_cont(*ptep)) { int ncontig, i; - pte_t *cpte; size_t pgsize = 0; - cpte = huge_pte_offset(mm, addr); - ncontig = find_num_contig(mm, addr, cpte, &pgsize); - for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) - ptep_set_wrprotect(mm, addr, cpte); + ncontig = find_num_contig(mm, addr, ptep, &pgsize); + for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize) + ptep_set_wrprotect(mm, addr, ptep); } else { ptep_set_wrprotect(mm, addr, ptep); } @@ -263,14 +256,12 @@ void huge_ptep_clear_flush(struct vm_area_struct *vma, { if (pte_cont(*ptep)) { int ncontig, i; - pte_t *cpte; size_t pgsize = 0; - cpte = huge_pte_offset(vma->vm_mm, addr); - ncontig = find_num_contig(vma->vm_mm, addr, cpte, + ncontig = find_num_contig(vma->vm_mm, addr, ptep, &pgsize); - for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) - ptep_clear_flush(vma, addr, cpte); + for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize) + ptep_clear_flush(vma, addr, ptep); } else { ptep_clear_flush(vma, addr, ptep); }