From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 3069937F311; Thu, 1 Oct 2026 12:04:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790856268; cv=none; b=AZzdE97v4hfamqJsAz/eGUoqlL1zPJSZs+95/hmcN0dOyVn3UFoAKV0euZvLkRaKiPXNWNouF6YzuMhFPXlTl+DbHTBS35wBeCV+tHTzsATOAL2yJRRRRlgwvQouGqwJ5RuD0ZXWpBDDVUtghQFISQBdnx2D8Fjvl69umK7RGx0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790856268; c=relaxed/simple; bh=CBvToYd/GEB02L8taC6XmYYZMLPqiqIVafuNtu1j4nc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=m2yzLZIxjA2vPdzrdlPfkcoL8XYSmVnGsw/HM+Pk/ux1Yalmdy7cm+3dK3eblxSj/P7xyRSzJJNoOs9a3bU9j2gdVUSyuUWnyTza8dYLbAM6dwOt3tlH74v4tQ868br6H4f4IltoqUH+nrOYQX4a9FjnV2ukfKnvQ8ccgLoi03o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jzEc16Qp; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jzEc16Qp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B39C71F00898; Thu, 1 Oct 2026 12:03:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790856267; bh=16tuaIAAfr4wGiFPpZL2QS3b7vOItbJPvdfgt9EFjWY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=jzEc16QpT6y5z85CoNqayXJTgj/zcV8+4j43vVNREEjYgKaYaARNlkINFh+o2cgFo sN3NMoR6fbvOc+m/lxGiWC6qUmK/W2sqF5PMeqx+QkX9s3sVMnzDWZ/M2mm0MYJz41 S3cSgkKzqx/7bn79m4vmUxCXlXwbjLyAsEIqKIlF/mizbYzyQzRqhlcK0ve8U5iSJn jaobTqj+k1b/C4rk1yKhopNUeonw8tSEDLii1LybOClMulCnzymBzlP7Dt9SdjRJKW 6NQE2pAYnLiSAfrqMon7C3+Tw8a0f45b0g+nJiXE+3PnL55rzlVV8mocIqh7q0QmOr ffT/Y1YtPvXzw== Message-ID: <14bb5577-ee28-4770-8566-f586f3840a8d@kernel.org> Date: Thu, 1 Oct 2026 14:03:45 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() To: "Lorenzo Stoakes (ARM)" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Greg Kroah-Hartman , Dennis Dalessandro , Jason Gunthorpe , Leon Romanovsky , Paul Moore , Stephen Smalley , Jaroslav Kysela , Takashi Iwai , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Doug Gilbert , "James E.J. Bottomley" , "Martin K. Petersen" , Jaya Kumar , Simona Vetter , Helge Deller , Sebastian Reichel , John Hubbard , Peter Xu , Masami Hiramatsu , Oleg Nesterov , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Rik van Riel , Harry Yoo , Juri Lelli , Vincent Guittot , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Arnd Bergmann , Muchun Song , Oscar Salvador , "Matthew Wilcox (Oracle)" , Jan Kara , Marc Zyngier , Oliver Upton , Catalin Marinas , Madhavan Srinivasan , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , "David S. Miller" , Andreas Larsson , Alexander Viro , Christian Brauner , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Youngjun Park , Johannes Weiner , Qi Zheng , Shakeel Butt , Axel Rasmussen , Yuanchu Xie , Wei Xu , Chengming Zhou , Michal Hocko , Miklos Szeredi , Xu Xin Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-usb@vger.kernel.org, linux-rdma@vger.kernel.org, selinux@vger.kernel.org, linux-sound@vger.kernel.org, bpf@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, fuse-devel@lists.linux.dev References: <20260917-b4-mmap-prepare-vma-flag-sanify-v3-0-4583d8a23bca@kernel.org> <20260917-b4-mmap-prepare-vma-flag-sanify-v3-3-4583d8a23bca@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/17/26 18:22, Lorenzo Stoakes (ARM) wrote: > Replace the open-coded VMA_SPECIAL_FLAGS check in the VMA merge logic with > two new functions vma_flags_can_merge() and vma_can_merge() and update the > merge logic to use the former. > > This abstracts the check and expresses it in terms of the desired behaviour > rather than an arbitrary and confusing VMA flag. > > This also lays the groundwork for making further improvements in VMA flag > usage. > > Also update the userland VMA tests to reflect the change. > > No functional change intended. > > Signed-off-by: Lorenzo Stoakes (ARM) > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David