From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 672A247798B; Wed, 2 Sep 2026 11:58:08 +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=1788350292; cv=none; b=RJeDN2pXdamfXydtViSXDhMOiObLCtx+OHsvV0iuMtR4tPn8/B0UOixuxFsqGKIGa9bBFc3LX3a5UyC9zz1M5cdGXcdwCboi/WNn6Zszf4CaMs4cfS8Uvv501HKD7Swb4Nkt79ucnr0FccObIvtu3Rcxa3vxBzHRYaB8gWotNV4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788350292; c=relaxed/simple; bh=JAI8HuvMrB06U9pngwcLmVHYlvLOsBAW7o0q3zLItzs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=QzN/anzdTjsv504sAgD8Rlpq+QEhNeWwnt08NSIXUVEEzfVuQ8BaLX4J4OO4mVtOc8a5RKQU7EN6q2xWHUqY1wItsDqvvXOCenyJuq5WOVx4R0H1YqckJp+GNuZ6FiHxasOWGow/w9kIW7L5PawV+3a/OB8iHItaoTw79Mm1GBM= 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; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=Br0kvwiZ; 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="Br0kvwiZ" 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 831ED1684; Wed, 2 Sep 2026 04:58:02 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 09BE23F85F; Wed, 2 Sep 2026 04:57:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1788350286; bh=JAI8HuvMrB06U9pngwcLmVHYlvLOsBAW7o0q3zLItzs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Br0kvwiZKirBYwtP8GSbqaahPr9eXVJSF3G6/g+zhRfz9rudpPonCKSJx1zZiDP5I seMnZ0FIMrBMphvLYpfrg+MO5sigrisjQEeqGAmO+6ELBvPgtEKno0usZoDWmbAedz z1OTeZdg4q9ETpJggfEcDWTY/b5vPm9214of8Xyc= From: Yeoreum Yun Date: Wed, 02 Sep 2026 12:56:14 +0100 Subject: [PATCH RFC v3 12/21] mm/pgtable: redefine PGTABLE_LEVEL enum with ascend order from PGD Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260902-dummy_ptxp3-v3-12-5d8f5b17c25c@arm.com> References: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> In-Reply-To: <20260902-dummy_ptxp3-v3-0-5d8f5b17c25c@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org, Yeoreum Yun X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1223; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=JAI8HuvMrB06U9pngwcLmVHYlvLOsBAW7o0q3zLItzs=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqmA7nq1z+UGkBh+k3plBTwHn84nfJGlTH4HLv6 PSsOOGZ/OqJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCapgO5wAKCRBt1cPRWsUx M4WQC/4j5E65SCGx3a5/ZzEhrT7FR7As2mIMS9VAlDcEK/fUO+neWKP+3tAec53rUxb4zzYZKQr g3mrmjGqQfOQWFk0eMRy2UiUFM9sGnzM+aPCUjoMiPSlvR4ZloQz6B11DzS/1vcE9hCDnTfjvtK qVQP7mnCLKp6tqIu24k7YyT7/1M5TwLF9MckxKXher2kNgQyHoOU0A++ZAo8AnP5mdlzo5T2a0H yqfNYTL2jA0+vAPusTvh552PMoTvcNMpL10IwhehGblQh3b2mr3AWKiPaiII+C/tvF8CX1S0hYO Lsv/z7b/+GbqLVyVEZPDMeZ76r21qIJjSuSzlY3XmUdMaIXYuG5Zh2EeZh0142nK7VIzSEQXJdl 1WqI52sg40psqB++3zm3uJk2vkt3ViK3XEvLCey+cs9cs3THb4NBf8ha4nuPMmOFiw6Bt6yHWOk PpTMxtIHG90CMyP8nQCuRgq1kKwGXaA+MSt7L4chgHdCIlEnjwejGwdNLXoe7Bqj4d0Sc= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 The PGTABLE_LEVEL enum values appear to be ordered in the opposite direction from their intended usage. Intuitively, higher page table levels should have smaller enum values, but PTE is currently assigned 0. For consistency and cleanup, reverse the enum value ordering. Since there is no current user relies on these numbers to be ascending from PTE->PGD, so it can be changed to be ascending from PGD->PTE, in the direction of the page table walk. Signed-off-by: Yeoreum Yun --- include/linux/pgtable.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index e3c8ab96941c..3186096a6e13 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -2288,11 +2288,11 @@ static inline bool arch_has_pfn_modify_check(void) typedef unsigned int pgtbl_mod_mask; enum pgtable_level { - PGTABLE_LEVEL_PTE = 0, - PGTABLE_LEVEL_PMD, - PGTABLE_LEVEL_PUD, + PGTABLE_LEVEL_PGD = 0, PGTABLE_LEVEL_P4D, - PGTABLE_LEVEL_PGD, + PGTABLE_LEVEL_PUD, + PGTABLE_LEVEL_PMD, + PGTABLE_LEVEL_PTE, }; static inline const char *pgtable_level_to_str(enum pgtable_level level) -- 2.43.0