From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 775512AD16; Mon, 4 May 2026 07:59:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777881586; cv=none; b=c7wEptD6wbTAOlKCDQ2+NY35zyh9pd/5lt1Cys4HyOA6PtjEkUuZFhX6ONZmAqj7cEeR6R7537gUAYAkCwb5mgEJGqXfRoyINiIKhEwf+vK0PwWS0aoSAiS+4YYmeMWvBq1neHtxHwaZp8iJbcPLBX7SAz/4CgFRLKzHIDnpwJY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777881586; c=relaxed/simple; bh=Z0FyTKWUyHMmgU1F1HDPTlLvaTh3LvI2R4javIhne/g=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=B3WZhjzxYV5R8vN7PmlrVotv3gaRcBes4fAYRPfMFJgsaqYr/2jOYxQfq/6xp0j5++nGNRMMWPHGgPISZbEOMgEFEoUXnmw007I2EcLkc42L3kcP6x63gw1pj4na/TGN4TxJEvjuh7tnGEqeVEwCSgUZSiIugQCql+CJ6gzxnH0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Xp0I8n21; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Xp0I8n21" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A5E5C2BCB8; Mon, 4 May 2026 07:59:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777881586; bh=Z0FyTKWUyHMmgU1F1HDPTlLvaTh3LvI2R4javIhne/g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Xp0I8n21lr/oh/1fyZjtCkraLJGJfkjbkamlq8icE+MNyykgTJm8mK+cCtsG9Su31 IViW5lB/u491Dwd9UKoLItqOts9bb6WPZiBaU5iYUt9GM/pzIUVM/LKy1qhY0Qk4ql NjrmnqCF0tcZewXQenlKO9rbPWp/hz0JwbRnvR3Hld4yuKTmzTvLfzbsq6U0//I1KJ Eh7jhQCsOwYfCsb8rLFpnQu+VHhIHUPz5hVPXpNSXi0VjZLBOKtHBAFVHYKeXdxoPg dzU7ijHO8/ZH2GCO0gLWnU/O7U+Cu682DdgAbvCSPM+Eb/XUbP5RSLtcc0VnOwr3pE FgRwhLWt7Kp0w== Date: Mon, 4 May 2026 09:59:37 +0200 From: Mike Rapoport To: "Kiryl Shutsemau (Meta)" Cc: akpm@linux-foundation.org, peterx@redhat.com, david@kernel.org, ljs@kernel.org, surenb@google.com, vbabka@kernel.org, Liam.Howlett@oracle.com, ziy@nvidia.com, corbet@lwn.net, skhan@linuxfoundation.org, seanjc@google.com, pbonzini@redhat.com, jthoughton@google.com, aarcange@redhat.com, sj@kernel.org, usama.arif@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, kvm@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH 03/14] mm: rename uffd-wp PTE accessors to uffd Message-ID: References: <20260427114607.4068647-1-kas@kernel.org> <20260427114607.4068647-4-kas@kernel.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260427114607.4068647-4-kas@kernel.org> On Mon, Apr 27, 2026 at 12:45:51PM +0100, Kiryl Shutsemau (Meta) wrote: > Userfaultfd RWP will reuse the uffd-wp PTE bit to mark access-tracking > PTEs, alongside the write-protected ones it already marks. The bit's > meaning now depends on the VMA flag (WP or RWP), not on its name. > > Rename the kernel-internal names that describe the bit: > > - pte/pmd/huge_pte accessors (and swap variants) > - pgtable_supports_uffd() capability query > - SCAN_PTE_UFFD khugepaged enum > > The ftrace string emitted by mm_khugepaged_scan_pmd for this enum is > kept as "pte_uffd_wp" so existing trace-based tooling keeps matching. > > Pure mechanical rename -- no behavior change. > > Signed-off-by: Kiryl Shutsemau > Assisted-by: Claude:claude-opus-4-6 Reviewed-by: Mike Rapoport (Microsoft) -- Sincerely yours, Mike.