From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm2-f13.google.com (mail-wm2-f13.google.com [74.125.225.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F6154E2F30 for ; Thu, 17 Sep 2026 12:22:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.225.141 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789647770; cv=none; b=czhAAOKuphHut/VVhjED7MeWMdV8UHb4HdyM3yJOFG/JQ6/mk+nXykRFkc178Ws50qKY7eZNSemm5OfiPY+eyOC7JM4WMyIblAG73zH4VCn7kNraQ0BiJiVRtK6dblmjjeQ4P6RnYRW3A5G6HZ0E4pvPo9USsPI7pOG6prBrHb0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789647770; c=relaxed/simple; bh=OJmskDiFOgBotmQnXQAOWrnTyjAq3r/ZPkOzXCktDOc=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gC2Adv2aiRP+AWD9KeF0vPmAPNzEHI37t8eGCIkncPk45alNS2L5Aji3CI+DWxClXrRu3slazlfC+oB93eDtSaifZLvQ5wJSZhloIi7eTgllJ14UPe6AT+6NwCe7Mb5WY5JGg5c7vrA5bsvFFy3m118ScmtONJUmZ8YuI01zxXs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=W8MWUiGW; arc=none smtp.client-ip=74.125.225.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="W8MWUiGW" Received: by mail-wm2-f13.google.com with SMTP id 5b1f17b1804b1-49e79a408deso3846575e9.2 for ; Thu, 17 Sep 2026 05:22:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789647757; x=1790252557; darn=vger.kernel.org; h=content-transfer-encoding:content-type:mime-version:references :in-reply-to:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=p0zmU2W+3BnffNO8O4v0JPRgPOvlhktXL05mpLnU1xo=; b=W8MWUiGWkLnPE3LZwZMs+M6hjewk3bifMXlRxyzDreqvti1vU2oOe8kuHIJilh+a4j avmi0gE2ouNHVuMutBqsR46ibWdW2hMSUIg+O7ewEblQDSqXn5oywiAzmcEOAAbnHJh9 CowIX7j0Z9oM0FI7AJhmCimPMAgxALlDijVAFCnLuHoqmAoi4nozpd09gBGC/BiDrVMP v8CWYPOQj7wYPLWd3xvspz5rrIP7ZmsQlXq/fr57voEYreoEfZ0jpBHODcwFTuLtahTp 5Ork4vvRYVxbjDbbXem88rlm5er/r+K8QtAMln4o0OqF8zBcjtvMGd0fo9MP/8kOij+L 7TVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789647757; x=1790252557; h=content-transfer-encoding:content-type:mime-version:references :in-reply-to:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=p0zmU2W+3BnffNO8O4v0JPRgPOvlhktXL05mpLnU1xo=; b=PCpZO3XkeHtK22uLXyP1SZ50YREd9LP66apX7Qqzk/wMMMkOWa/b1pYSiL27aFYvfz FnJid4Mx453uczEWXb9ElkfzOTMF58s/GJFoJU6S0Ouy3YdCuJIcLX/fzIS9JahKyt4X vb29GXpwa8Pk91lfOP8M7ijBGkd4gbp+X+G/U7LsNsJtDOl4J+O/uw7VnjW9eF9SeGR4 sNnGJHcWnDOfX8R0gCtOYxDXFFYqzF68PyjGenVy/yMnBH52pv4xSzWVHvDupIUTKqGr XmAfQcJTQYox7JUxOg+KwaPr9jNTTQrvbRLYv5CHatvY5lFuBnMUDExetmJXHDNs029c kODw== X-Forwarded-Encrypted: i=1; AKwUvBzhMu15fwvgCkLRHYYq+AyGPVIEVmP9vTD8Bmv74RklNrVKvm29ez69sb4irAVrDzEgT2SbSeBi+rgTdus=@vger.kernel.org X-Gm-Message-State: AFuF++k+Tua+nudpkYc1zh3E8lrKTRzdVQIID2QRE5kmpV0qBjGzFzFM DZMZJsNlEQqY5RxUF+07zar+L1y1P7cNwsJAl0YDFn7l9+5plkkVg+2k X-Gm-Gg: AYBFou2SvbMPazhtQYaQxY08dFOl2oQipPgkRVvxdQXJjFcm8VXpEeScAisoH/MB1TR lLlHNWE6MscoEG63yAoc4EiCaeVbea6or7WQCoz7NXufmRwlqWT6rGCSgaxbNlR5sWA3JTo7bfD vS8ag4vHBB5TgRYb+ZgDxpFYXix3/xAKPPd19ssiQooMceou9bcd80i5oSSKRk52QTN0a3q+jrg MYQ1YGaZdH8KhhyuaebSiKJ9nDy2zDaQAZ488yJwhvTgTrqnGIp9B41cgQPE1r6B8QM8CqKedHy s6jidgoWhzS59W3s9YWENwu6ygpJq/7WDnCkCn2gYrJI3bG+N92JjzYnj3QWDIu0OoZfVwLMTSh rs1f5c4DopFNIwM4/usnYobVcG3SK6XNJWMO+xPe3cpO1HV23fU3f3EKiI8wQO7tSWRvQHSJA9A hKOPR0m34FYhbdEoSb5ynQOrYWZD/d0ATv1yED7n99IJo2xMRNOIJ80wfkzScCidiVlRyx+WJI1 bo1MVoOIPLJBdknj1iSHJm9Edj8VfuG+feI X-Received: by 2002:a05:600c:4ed4:b0:49c:de80:b833 with SMTP id 5b1f17b1804b1-49eac462571mr73688225e9.2.1789647756735; Thu, 17 Sep 2026 05:22:36 -0700 (PDT) Received: from pumpkin (82-69-66-36.dsl.in-addr.zen.co.uk. [82.69.66.36]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4870bef7678sm15969081f8f.2.2026.09.17.05.22.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2026 05:22:36 -0700 (PDT) Date: Thu, 17 Sep 2026 13:22:31 +0100 From: David Laight To: Christian Brauner Cc: linux-fsdevel@vger.kernel.org, Alexander Viro , Jan Kara , linuxppc-dev@lists.ozlabs.org, linux-gpio@vger.kernel.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-media@vger.kernel.org, wine-devel@list.winehq.org, linux-xfs@vger.kernel.org, io-uring@vger.kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/4] file: declare the FD_PREPARE() variable with __cleanup() directly Message-ID: <20260917132231.26314015@pumpkin> In-Reply-To: <20260917-work-file-fd_prepare-v1-2-b87534ca49f3@kernel.org> References: <20260917-work-file-fd_prepare-v1-0-b87534ca49f3@kernel.org> <20260917-work-file-fd_prepare-v1-2-b87534ca49f3@kernel.org> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 17 Sep 2026 11:09:43 +0200 Christian Brauner wrote: > The whole CLASS_INIT() detour isn't needed. Use __cleanup() directly and > give the destructor a private name. It also makes the code enormously easier to read. David > > No functional changes. > > Signed-off-by: Christian Brauner (Amutable) > --- > include/linux/file.h | 9 +++------ > 1 file changed, 3 insertions(+), 6 deletions(-) > > diff --git a/include/linux/file.h b/include/linux/file.h > index 2b864f457211..926cc58d0b7f 100644 > --- a/include/linux/file.h > +++ b/include/linux/file.h > @@ -146,9 +146,6 @@ struct fd_prepare { > struct file *__file; /* do not access directly */ > }; > > -/* Typedef for fd_prepare cleanup guards. */ > -typedef struct fd_prepare class_fd_prepare_t; > - > /* > * Accessors for fd_prepare class members. > * _Generic() is used for zero-cost type safety. > @@ -160,7 +157,7 @@ typedef struct fd_prepare class_fd_prepare_t; > (_Generic((_fdf), struct fd_prepare: (_fdf).__file)) > > /* Do not use directly. */ > -static __always_inline void class_fd_prepare_destructor(const struct fd_prepare *fdf) > +static __always_inline void __fd_prepare_cleanup(const struct fd_prepare *fdf) > { > if (unlikely(fdf->__fd >= 0)) { > put_unused_fd(fdf->__fd); > @@ -199,10 +196,10 @@ static __always_inline struct fd_prepare __fd_prepare(int fd, struct file *file) > * @_file_owned: struct file to take ownership of (can be expression) > */ > #define FD_PREPARE(_fdf, _fd_flags, _file_owned) \ > - CLASS_INIT(fd_prepare, _fdf, ({ \ > + struct fd_prepare _fdf __cleanup(__fd_prepare_cleanup) = ({ \ > int __fd = get_unused_fd_flags(_fd_flags); \ > __fd_prepare(__fd, __fd < 0 ? NULL : (_file_owned)); \ > - })) > + }) > > /* Do not use directly. */ > static __always_inline int __fd_publish(struct fd_prepare *fdf) >