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 B1D5039A7EA; Wed, 25 Mar 2026 08:50:02 +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=1774428602; cv=none; b=VcensH0K+KRKFxna/4efBlS0jWfmEAclqbqYQGCywHkY1XsV1lz3H2yOX+K1X+rQmb3x3vqqsDBY6RMmrAK2FAcq/I25EcPPRHJVpnSi+oPgycufQ2xiK5hrGt5GeqUO7nTgVOPyiiUi+6uEXG8jPntVpC+oixSfTVOkw1ets9o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774428602; c=relaxed/simple; bh=2OtW7QmiVigTTK06LISL3S/tZBy8Ab6IzToCMPrG2QI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Xn4l03QV7jfWn2mojqiUF4T6fzDyReNdp01DykfO3mMhuHd2H9w+k4N0ENntXuzyDO+JyqNisor2F3fXfMEwtXZhxH15I0ok4tQMnEgF5qaHChMalDUyhoH7nXCeNA/DVpFP9y7ETxERyfMIR31PDQ/JXeiIWc6wXlHun2Som5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qCvygCAF; 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="qCvygCAF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFC77C4CEF7; Wed, 25 Mar 2026 08:49:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774428602; bh=2OtW7QmiVigTTK06LISL3S/tZBy8Ab6IzToCMPrG2QI=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=qCvygCAFXRT4PUtLUGkctheDZeJvsmkkNlvGwTtOfZTeYh+7PcP5dK2AHTFWlzs1k 8u1zaiLL/xbbvX/nUy+xWmExLkC2lY0x+B3xromtO0kZvFcVqc0rpxiWkITihqhkEA GxJb2iydrvQ/4YLqdEYnG1ydabKkugvoOJQR2RKrkmmOQuZ1lM31WOc6LmnwfreCm9 uic95so6GLb/ms7TIgVBFMR1cgP8PBS91l9uAwk6aUbZzB0hzEQM7CHWfeUcHJLnJT +bOx7vnx4wlYbzrXN9aYxdX9EHVqTL0VeOg6P5gjRJxgrXnw2KZAPmTSqJpulX5otV FM6y2TC6c2iFg== Message-ID: Date: Wed, 25 Mar 2026 09:49:54 +0100 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4] mm/userfaultfd: fix hugetlb fault mutex hash calculation To: Jianhui Zhou , SeongJae Park Cc: Andrew Morton , jane.chu@oracle.com, Muchun Song , Oscar Salvador , Mike Rapoport , Peter Xu , Andrea Arcangeli , Mike Kravetz , Hugh Dickins , Sidhartha Kumar , Jonas Zhou , linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, syzbot+f525fd79634858f478e7@syzkaller.appspotmail.com References: <20260324170311.dc5b54fe0765f2e680e3cc90@linux-foundation.org> <20260325010618.85366-1-sj@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 3/25/26 07:07, Jianhui Zhou wrote: > On Tue, Mar 25, 2026 at 01:06:00AM +0000, SeongJae Park wrote: >> Seems userfaulfd.c is the only caller of the new helper function. Why don't >> you define the function in userfaultfd.c ? > I kept hugetlb_linear_page_index() in include/linux/hugetlb.h because > this is hugetlb-specific logic, not userfaultfd-specific logic. Yes, and see my comment about either removing it entirely again next, or actually also using it in hugetlb.c. -- Cheers, David