From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793322704; b=AfGD4uY14Cd7ipDOOe4lqes+YbZ1a3Hh0AW0mvzR3vZowsI14+pf4t4GKNjZFYZQ/Gtx pP+EMdk8/cDjSNwu7fWmdAL1wGuxKKfvxZRBUlJmSl2yggW/Tujtse5K4yJ0p/WiH80vu 8pZgu2nL0t10aSdZ0EZ94T3tnUAQSZO1zYaAe6mDkGRNUpQTfwnvkoJlVQVbm0u6tOFTB oDfkJkM5ORsKuvXug4gZm15o61zc6W/FZo7xECeemV8FrDW8/6D75UhdrMDTW7Ar8PqiR SMe9Wb90NxdiVSChhSRB//0eQTgtX/ZSWZM0UNjmF5/4bG5s084bVUVgzPeLQw2SwnA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793322704; h=Received:DKIM-Signature:Message-ID:Date:MIME-Version:User-Agent: Subject:To:Cc:References:From:Content-Language:Organization: In-Reply-To:Content-Type:Content-Transfer-Encoding; bh=tgtuNNBFFB7xe0qBe8dGzhZDn8Gpip/Q2jXZbv9lnAc=; b=zqNvyrzM6erRHiJM8CKIfCg8C+IRcooqm47e85Dhp2VsGelHK1uXeo/GFbqys2v+pmE2 RvyEh+n7+x74qULYLBvfcG5DsG1RQjq01S7cJo3Eon7qCRHmZGJfr+UVUaQOuQh9ZHymK 98w80tJEvHL0jq67Xw2C9slFO0YxeVzo0RNe1t005OUksqrS6X/IbT2TTUbBo0VM2N7M1 rpISezBTUIl6f6c2IIT65IU5xu00/lGfY5w+XqFDHuQup7TZesLsxkPPevWIA0+ikNY7P fp7+qonnjCHwAj6UWS8aaE5g1aukHuDK9Gr4EVvgQyp/U6C3q3Y9ADzlEEHoDL79FPA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=BvpWeHou; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F1F2606A31A for ; Fri, 30 Oct 2026 01:11:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=BvpWeHou Received: by smtp.kernel.org (Postfix) with ESMTPSA id 865E71F000C1; Fri, 30 Oct 2026 01:11:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793322703; bh=tgtuNNBFFB7xe0qBe8dGzhZDn8Gpip/Q2jXZbv9lnAc=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=BvpWeHouZBTziTgepMF3fKGePe6r84OdV5sAWUi2Cm9J8y0ImhdFmasW0WeQk0Luw dmgpLlYCKJBvp8a90BuVHIn/hQt8flDAmTZliTw0rzmRgVSy1f7Kt3mMv+fuQPa3aw PFtZ5dMFyy4tXgrlPELxF0AbKZ1GEfu3VQL1x0+DsTyRJqNoDodDRkOVR2E5oheFwq FDvIvNdsEcKi//fiYoS9tVjlHaqfyTxFf5SgaNEbJjThtbErDnCzmr+ImgOhU4zeaQ VtmaxUqC4zr/6O6uu4QAF8QW+1VuXX7PDyUivuAigq8wT4s6fX3m7MjoddPUnM/B+a FlDYW8UW3/e3w== Message-ID: <2b8611f5-91d1-4059-9f9f-7918fc8f3ab3@kernel.org> Date: Fri, 30 Oct 2026 08:11:39 +0700 X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 4/4] zloop: check that the zone backing file support ->{read,write}_iter To: Christoph Hellwig , Jens Axboe Cc: Josef Bacik , linux-block@vger.kernel.org References: <20261029150353.2503201-1-hch@lst.de> <20261029150353.2503201-5-hch@lst.de> From: Damien Le Moal Content-Language: en-US Organization: Western Digital Research In-Reply-To: <20261029150353.2503201-5-hch@lst.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2026/10/29 22:03, Christoph Hellwig wrote: > I/O to backing files requires support for iter based read/write, so check > for that upfront instead of dereferencing a NULL pointer later. > > Fixes: eb0570c7df23 ("block: new zoned loop block device driver") > Reported-by: Josef Bacik > Signed-off-by: Christoph Hellwig Reviewed-by: Damien Le Moal -- Damien Le Moal Western Digital Research