From mboxrd@z Thu Jan 1 00:00:00 1970 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 704BCC61DD3 for ; Thu, 3 Sep 2026 10:31:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 69DFC6B00B8; Thu, 3 Sep 2026 06:31:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 675C96B00BF; Thu, 3 Sep 2026 06:31:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 58BE76B00C1; Thu, 3 Sep 2026 06:31:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 2DEE26B00B8 for ; Thu, 3 Sep 2026 06:31:09 -0400 (EDT) Received: from smtpin13.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 89764C048A for ; Thu, 3 Sep 2026 10:31:08 +0000 (UTC) X-FDA: 85172083416.13.168685E Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf05.hostedemail.com (Postfix) with ESMTP id C6A7D100007 for ; Thu, 3 Sep 2026 10:31:06 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=arm.com header.s=foss header.b=aEI5eI1Z; spf=pass (imf05.hostedemail.com: domain of usama.anjum@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=usama.anjum@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788431467; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=GLTSzulnCarGYZsfiK6VZepBPuGvEEqlR3S5HBAbRdE=; b=oem1zK/m/kcNIPyZj/48DdEhMb5sx2v2G0DEUN3Sbuh45et1hTjnqXxbocur++1k/dmgFi +zA/M0AZP7C0Sb/o31pedDGk+Gz84EOwS/FZ8xPOBomD1XsZFWnchC3aFU245UwNqGE9dX JEYXDPOh9MpIdeqHuQb2PbhInxIrCX4= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788431467; b=R+TgLQ1Nim9F7UyBLfWzXeCmkpXuWn5xm1AstVzGz3kYWMHYki7OaAmV8Jbb08CPP5KYjO noOAab4Yd6rd9MyH1GG4aVcinLLP+iaD6jKwmJWvgxwX1isS9OTV/pZu+Co5CuivVhM8P3 ArKWWOufuQkQOa2/+gOYeJXgFEtxAsA= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=arm.com header.s=foss header.b=aEI5eI1Z; spf=pass (imf05.hostedemail.com: domain of usama.anjum@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=usama.anjum@arm.com; dmarc=pass (policy=none) header.from=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 22B9C1F37; Thu, 3 Sep 2026 03:31:02 -0700 (PDT) Received: from e142334-100.cambridge.arm.com (e142334-100.cambridge.arm.com [10.2.198.93]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B04F83F673; Thu, 3 Sep 2026 03:30:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788431465; bh=iZ0UxDW+PGfZPY4n2x5quNoQFlhhWYff8wQolJj8CQc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aEI5eI1ZDdVq2m64EA9ImU65GZFhZiL0ZK/lLsHlinaxtNpnT2nFBXA1JkEFJ2dA5 GAImWCHFC6p4QBtqqRBlk66RPeHRj2Ei0OGOPqGAPPTqssaugxDn76YWiAfBhwdKz2 oxnCSs2C9wVP4R71Kj0L4+hylcBhUUG7uFZhGTMI= From: Muhammad Usama Anjum To: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Dimitri Sivanich , Arnd Bergmann , Greg Kroah-Hartman , "James E.J. Bottomley" , Helge Deller , Juergen Gross , Stefano Stabellini , Muchun Song , Oscar Salvador , Andrew Morton , "Liam R. Howlett" , Lorenzo Stoakes , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , Andrey Ryabinin , David Hildenbrand , Pasha Tatashin , Chris Li , Kairui Song , Uladzislau Rezki , Steven Rostedt , Masami Hiramatsu , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , SJ Park , "Matthew Wilcox (Oracle)" , Jan Kara , Jason Gunthorpe , Leon Romanovsky , Miaohe Lin , Dennis Zhou , Tejun Heo , Christoph Lameter , Mike Rapoport , Johannes Weiner , ziy@nvidia.com, pfalcato@suse.de, agordeev@linux.ibm.com, ryan.roberts@arm.com Cc: Muhammad Usama Anjum , linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, kasan-dev@googlegroups.com, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, damon@lists.linux.dev Subject: [PATCH v2 2/8] mm: rename pointers to software PTE values as ptentp Date: Thu, 3 Sep 2026 11:29:54 +0100 Message-ID: <20260903103002.1091859-3-usama.anjum@arm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260903103002.1091859-1-usama.anjum@arm.com> References: <20260903103002.1091859-1-usama.anjum@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C6A7D100007 X-Stat-Signature: h8gt3y6pa6zze8rf8ybbt8uzn6g9ouhp X-HE-Tag: 1788431466-443827 X-HE-Meta: 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 BizfmGRb 4sejyRIHu9axxHWwZ6MSEvVexPOTI/FMx2ETwW9shu6wLOcA1KIrpOzYc5kJWKa7Y2E2G07EvSGVJjSc3BbzuNp03mzsOUgeia8YMESsSdfU51WXZtihOF5t7QSFkIn2UufaNerOBCdyIZ0q6wyHww474jJMwm1mp4SEkyuCVtijyahfov3RoFBT5idL3c9qjTns8leJvaS1Tri8wMKMISaXtuMwTswB588cfsY7kDqS5YyrAnIcN2mk7qruQfVlXFLKL1sCGFXuAgguzGAAwtkr8Hg3atNj88e1cYgJViLRLsagQYyUI/X/xECdghW8jJTXZ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Some interfaces use pte_t * for a software PTE value rather than for an entry stored in a PTE table. These pointers must remain pte_t * when pointers to PTE table storage are converted to hw_pte_t *. Rename these parameters in the install_pte callback, write_protect_page(), and guard_install_set_pte() to ptentp. The later Coccinelle conversion skips pointers named ptentp, allowing it to convert the remaining PTE table pointers without changing these interfaces. Some functions already use ptentp for such pointers, including: - madvise_folio_pte_batch() - folio_pte_batch_flags() No need to rename them. This patch only renames parameters and makes no functional change. Signed-off-by: Muhammad Usama Anjum --- Changes since v1: - Rewrite the subject and description to distinguish software PTE values from PTE table storage. Changes since RFC v1: - Update the description for the architecture opt-in conversion. --- include/linux/pagewalk.h | 2 +- mm/ksm.c | 4 ++-- mm/madvise.c | 4 ++-- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/include/linux/pagewalk.h b/include/linux/pagewalk.h index b41d7265c01bc..c34d826c5e4a2 100644 --- a/include/linux/pagewalk.h +++ b/include/linux/pagewalk.h @@ -89,7 +89,7 @@ struct mm_walk_ops { struct mm_walk *walk); void (*post_vma)(struct mm_walk *walk); int (*install_pte)(unsigned long addr, unsigned long next, - pte_t *ptep, struct mm_walk *walk); + pte_t *ptentp, struct mm_walk *walk); enum page_walk_lock walk_lock; }; diff --git a/mm/ksm.c b/mm/ksm.c index 624f37975e129..2a4f19fe0f696 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -1292,7 +1292,7 @@ static u32 calc_checksum(struct page *page) } static int write_protect_page(struct vm_area_struct *vma, struct folio *folio, - pte_t *orig_pte) + pte_t *ptentp) { struct mm_struct *mm = vma->vm_mm; DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, 0, 0); @@ -1371,7 +1371,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct folio *folio, set_pte_at(mm, pvmw.address, pvmw.pte, entry); } - *orig_pte = entry; + *ptentp = entry; err = 0; out_unlock: diff --git a/mm/madvise.c b/mm/madvise.c index 73c2901b9adbf..dd75a673e108f 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -1113,12 +1113,12 @@ static int guard_install_pte_entry(pte_t *pte, unsigned long addr, } static int guard_install_set_pte(unsigned long addr, unsigned long next, - pte_t *ptep, struct mm_walk *walk) + pte_t *ptentp, struct mm_walk *walk) { unsigned long *nr_pages = (unsigned long *)walk->private; /* Simply install a PTE marker, this causes segfault on access. */ - *ptep = make_pte_marker(PTE_MARKER_GUARD); + *ptentp = make_pte_marker(PTE_MARKER_GUARD); (*nr_pages)++; return 0; -- 2.47.3