From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f176.google.com (mail-pl1-f176.google.com [209.85.214.176]) (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 16B1C28D8D9 for ; Tue, 25 Nov 2025 19:09:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764097780; cv=none; b=IQXU19m0BVWLMBsvCHid8XdCS1q2mrncuWcRsdBigIo7vdpb/L1fbaXOGXt25rgN+IP7u+09bQNha0xXteNCclR3KJ+X8Z06r/1Z0QT/f1hh5zH4ToVhphPL3pjqTsipGo2SMgYWSBWrBqZFI2G4aoaCi+AxZTf7pzUqJYDsBEE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764097780; c=relaxed/simple; bh=WhPVHCJW76FGJUYswsjQFNbMTK7L4YrF4FJlMHrzrPk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=vGQA1fFhs79agNq6wBsct1JzF5KDxyqYSmfgs2KkjgA6sBQonZpO5MUu77d/1amghQRjNa/tpwcxPMV6gIpuzRmR5iEXQOJ7y90yg8FKEgzdpnb0IZsoTUJhDaHMxz0atqDpR8FjHGYyaSVIunNEbmiWlQfPi1NsuGvC+b34OgY= 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=NlOgYsPb; arc=none smtp.client-ip=209.85.214.176 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="NlOgYsPb" Received: by mail-pl1-f176.google.com with SMTP id d9443c01a7336-29845b06dd2so72989955ad.2 for ; Tue, 25 Nov 2025 11:09:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1764097777; x=1764702577; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=KqV4ea26VpNRnNDOYj3v3FWNR4t9iRrjXWCFY4hl9NI=; b=NlOgYsPbCXU9ejFGWz4GDe2nHBW8zxMR8CehaM3nG60xRZqeNQQXfZUlIRkmIFBfbZ mQWQbA7O+kmym/wi4PrFU4ZAQXNrFPiHsXlJhlk1uPhITqoDH67Zp22ytXmSmlj9tEPQ LC7BfDQV6eDnsK7dq9Lxu+YRLW9mOq9my6XatCYFQLcGdGlymd9YZzGwmUaNvMWAWTbK 6RvmofRhZd5VLG/eYu7+akPmBR5qKQ8fqVjyxt27WJOmTtBQiL9ae51YLAA0Ax7zzv5+ x9kobiSDBPcjegvtSyNJ7g64XdvF9FEjsRef9ExNv194OhegnXLgMN3m9EEuRX7VNDyQ PRWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764097777; x=1764702577; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=KqV4ea26VpNRnNDOYj3v3FWNR4t9iRrjXWCFY4hl9NI=; b=qEN2tt0WhzsO61WPTTg2P/gPWGlOWDeIUZ8KaydMeYAfd00Olqq/itJKb1LBaXd725 hYlusn0RFPlrqBTj9HronFZwTw8H/nywEfJSvpaIuwD/oTvkmSVG4jy8SdgblfFUicDm H+wnQ/DlUjD7pYKBRzFKDNav7AKWGy/2NVwfTs/gXc9OEWw4+XHmOC89iLlPMrjikuOZ ghwBU/hqDmDNEskWRl6BJcTaF83WIPU/hAFlMLoZ4zyYyO1XJdUOpS2qNv0c4eor822n Y8HEmTHIW4SGkzH0yQdOGkGcSqH6o5fX0OgnF6Wr/4ZHJrKpW/6907L1Wt6xzZpvS8Oh HiRQ== X-Forwarded-Encrypted: i=1; AJvYcCU9wuU8JzfLG2kAlUeaPeqouq5rEL29/0HLpfhDdIkoiUQcY5wwPB1avsUaiCmGq8axvDUzNIZEX4yxC/k=@vger.kernel.org X-Gm-Message-State: AOJu0YyVu2pjucddCyIbRIZ4SHwpR6JtVtwK1W1ChyZ2BKRca4hTKlC9 iMJUtiIpLeObia9cUBRqnpAQ8ETzBHXdTi/SBRjF8E1XwaGqrjV0bzph X-Gm-Gg: ASbGnctL/yVdOyef3YheROCecAB2qQZjz32YZtT1KGJ1EEx7hnXqYQ3comgXhpWPxSA Kt9kA/qo0h+E5L06io0rKNIKf1Fd0hJSc97k5GKwf/eyj/Scc7hN5GqtQUx1Edl3QZGDKwzZ2uJ FY33sbxubk56hpsch1xbzsHh3nJYBFn2bh9963n50ygtoCw3GAki9hICC6cm01D38Xwp/pDeTdw +bwBfspYpwoHdoVeeY8yKJevw2a4hPiV0bLfpyEhMKRXg8jJ82RnKoCfFXWGM+2rz0fxkcpTZyd daCAJ2J9wlH9J6nNtPqFBgqiPnvUbTapIUSrV8KIUGbpaJU5MtA1rQqjQKq6zYdogw9sZxlQv05 6XQ8JE2tzQ0S6kRKDwzXuEQg4ilV/Hpr9FKiC7eE8BK0+rqZi/kAtaUfLtau7CeWsNuQUGQtPDy gfNWD9UjlhlSeR5XjTczTRDK3HEP7S1D8Sgq1joyBL7b/tixcRoHvutGP1vteoU7Mu X-Google-Smtp-Source: AGHT+IHuIf8IdstsNtTBrFtuIhxYayVPP9kbYzco+dRdLBQVBBJBvJGBn5Q65xamj5HkAzoQXFriDQ== X-Received: by 2002:a17:903:2acb:b0:294:fc77:f021 with SMTP id d9443c01a7336-29b6c6b32f7mr194870325ad.49.1764097777372; Tue, 25 Nov 2025 11:09:37 -0800 (PST) Received: from ?IPV6:2600:8802:b00:9ce0:a9c6:421a:26c5:f914? ([2600:8802:b00:9ce0:a9c6:421a:26c5:f914]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29b5b107cc2sm176518725ad.16.2025.11.25.11.09.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Nov 2025 11:09:37 -0800 (PST) Message-ID: <851516d5-a5e8-47dd-82e0-3e34090e600d@gmail.com> Date: Tue, 25 Nov 2025 11:09:35 -0800 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 1/6] block: ignore discard return value To: Jens Axboe , agk@redhat.com, snitzer@kernel.org, mpatocka@redhat.com, song@kernel.org, yukuai@fnnas.com, hch@lst.de, sagi@grimberg.me, kch@nvidia.com, jaegeuk@kernel.org, chao@kernel.org, cem@kernel.org Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, linux-nvme@lists.infradead.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, bpf@vger.kernel.org, Johannes Thumshirn , "Martin K . Petersen" References: <20251124234806.75216-1-ckulkarnilinux@gmail.com> <20251124234806.75216-2-ckulkarnilinux@gmail.com> Content-Language: en-US From: Chaitanya Kulkarni In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/25/25 09:38, Jens Axboe wrote: > On 11/24/25 4:48 PM, Chaitanya Kulkarni wrote: >> __blkdev_issue_discard() always returns 0, making the error check >> in blkdev_issue_discard() dead code. > Shouldn't it be a void instead then? > Yes, we have decided to clean up the callers first [1]. Once they are merged safely, after rc1 I'll send a patch [2] to make it void since it touches many different subsystems. -ck [1] https://marc.info/?l=linux-block&m=176405170918235&w=2 https://marc.info/?l=dm-devel&m=176345232320530&w=2 [2] From abdf4d1863a02d4be816aaab9a789f44bfca568f Mon Sep 17 00:00:00 2001 From: Chaitanya Kulkarni Date: Tue, 18 Nov 2025 10:35:58 -0800 Subject: [PATCH 6/6] block: change discar return type to void Now that all callers have been updated to not check the return value of __blkdev_issue_discard(), change its return type from int to void and remove the return 0 statement. This completes the cleanup of dead error checking code around __blkdev_issue_discard(). Signed-off-by: Chaitanya Kulkarni --- block/blk-lib.c | 3 +-- include/linux/blkdev.h | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/block/blk-lib.c b/block/blk-lib.c index 19e0203cc18a..0a5f39325b2d 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -60,7 +60,7 @@ struct bio *blk_alloc_discard_bio(struct block_device *bdev, return bio; } -int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, +void __blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop) { struct bio *bio; @@ -68,7 +68,6 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, while ((bio = blk_alloc_discard_bio(bdev, §or, &nr_sects, gfp_mask))) *biop = bio_chain_and_submit(*biop, bio); - return 0; } EXPORT_SYMBOL(__blkdev_issue_discard); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index f0ab02e0a673..b05c37d20b09 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1258,7 +1258,7 @@ extern void blk_io_schedule(void); int blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask); -int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, +void __blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop); int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp); -- 2.40.0