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30 May 2023 07:59:16 -0700 IronPort-SDR: uoO7OAb8Rbai8cKgJymQK7W4XKI+NlAnG6HDCi8QqM7mtI6E9SBztbMSPVAHHXkyD5wS0TiagB zwsZz4Lc/J2aZzF+Mlm2SSoQODj2TQmcJ97GwYMdyo0esUPwJRVyQz9paaoxA4nohmqRdWmmxO S250ZL7bmPo0YQ7S943KQRNaXs/Lw2JPLCCx68yUQpjAN3ERvara5+yzICrxbaCvHvUKuOeFn5 WQ2BgTAjgwj+oUkxmFhmgnUej8e/Wo6551HAGEv9hdjrJsbcc4zdEck0heYyMZJ0oinBH2yZjQ tl0= WDCIronportException: Internal Received: from unknown (HELO redsun91.ssa.fujisawa.hgst.com) ([10.149.66.6]) by uls-op-cesaip02.wdc.com with ESMTP; 30 May 2023 08:50:00 -0700 From: Johannes Thumshirn To: Jens Axboe Cc: Christoph Hellwig , Hannes Reinecke , Chaitanya Kulkarni , Damien Le Moal , Ming Lei , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, dm-devel@redhat.com, Song Liu , linux-raid@vger.kernel.org, Mike Snitzer , Matthew Wilcox , Dave Kleikamp , jfs-discussion@lists.sourceforge.net, cluster-devel@redhat.com, Bob Peterson , Andreas Gruenbacher , Mikulas Patocka , gouhao@uniontech.com, Johannes Thumshirn , Damien Le Moal , Sergey Senozhatsky Subject: [PATCH v6 11/20] zram: use __bio_add_page for adding single page to bio Date: Tue, 30 May 2023 08:49:14 -0700 Message-Id: X-Mailer: git-send-email 2.40.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E29D42001B X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: ragt1sciqi6raga1zqbe3t69fr1cqm6d X-HE-Tag: 1685461805-427426 X-HE-Meta: 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 FB/2XlK4 +N6pIowSZMTSfR7Q1oaqXtFitlsvJpBqSP7HJrsEQztIszEk6+C5ZdmUVDKcNahhbdwX6qbx7vJtQ39DsNPiFgUUD5OuF9/pgFzBekcGv2cJAX4pZSc7QyTEY6LxDCCTIVVVIEl+d7zHPGB7mx11/gJWjK+3qfr7t+NTYX4m2OUJR1Uuy+uoW7X2VQgSGsbNxJY2MRTOZTrGlPBzw/wsW8yJTHHWt2SK8KfmCQNdoxDstKkfh9gXpC2uQgBKxDFb29Vw11jcxEL5hXNvm8uMBINJFPnSZKma+t9IhaeH8jnYsc8fvOHhZZf9YoVknNocuDj16rpg8EgMDsysqa19VUTuPxGZBQAZccTOh81cIIxNC4+op0RpPmqPeBLji9BH6kDsQy1aCtPueA6L48uPIbe/ns1AfvgomQ2vwAU0RDz5QeKSeuXn5irLhQTs2ICS9mOTIlNzF+85G6uE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The zram writeback code uses bio_add_page() to add a page to a newly created bio. bio_add_page() can fail, but the return value is never checked. Use __bio_add_page() as adding a single page to a newly created bio is guaranteed to succeed. This brings us a step closer to marking bio_add_page() as __must_check. Reviewed-by: Damien Le Moal Reviewed-by: Sergey Senozhatsky Signed-off-by: Johannes Thumshirn --- drivers/block/zram/zram_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index f6d90f1ba5cf..b86691d2133e 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -700,7 +700,7 @@ static ssize_t writeback_store(struct device *dev, bio_init(&bio, zram->bdev, &bio_vec, 1, REQ_OP_WRITE | REQ_SYNC); bio.bi_iter.bi_sector = blk_idx * (PAGE_SIZE >> 9); - bio_add_page(&bio, page, PAGE_SIZE, 0); + __bio_add_page(&bio, page, PAGE_SIZE, 0); /* * XXX: A single page IO would be inefficient for write -- 2.40.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5D00C7EE39 for ; Wed, 31 May 2023 11:38:44 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4ECEF6B0083; 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31 May 2023 04:38:37 -0700 From: Johannes Thumshirn To: Jens Axboe Cc: Christoph Hellwig , Hannes Reinecke , Chaitanya Kulkarni , Damien Le Moal , Ming Lei , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, dm-devel@redhat.com, Song Liu , linux-raid@vger.kernel.org, Mike Snitzer , Matthew Wilcox , Dave Kleikamp , jfs-discussion@lists.sourceforge.net, cluster-devel@redhat.com, Bob Peterson , Andreas Gruenbacher , Mikulas Patocka , gouha7@uniontech.com, Johannes Thumshirn , Damien Le Moal , Sergey Senozhatsky Subject: [PATCH v6 11/20] zram: use __bio_add_page for adding single page to bio Date: Wed, 31 May 2023 04:37:53 -0700 Message-ID: X-Mailer: git-send-email 2.40.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E5FF210001A X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: q57zq9qpn4oktacgn3r591kebmtdgmgx X-HE-Tag: 1685533121-704678 X-HE-Meta: U2FsdGVkX19x2vutAIVxrBHIX2Yyyz4W9wm7YhxEOTBlONYZrIIqvIuxIkOF2vP++X7AUUU3vxEgSYCVIZzH7HdzUdyTz3lT6WQmv78tA95uDInqV3XjqTQ3Cci9gTMqBdvnZpbwICRQvMGWbL43B6oMnMbFGULLc6zrXYjFOSeqs/3uMaE7TPMq68Q2Z7Av1c6t/CKLOmipBhwov5QHqRSaDOERTExSM/h2cISftsD+5gCGfEaRL2ICxAzUL1h/C37DpANZ1NpS4IhoN51cPHl8GmgxarGiMXlRwwwOTk3mCHxZTwGg38fFki63avyCOw4MquIgTvHjlWO5tCTq+KmlhOjwjBB9UTTVx8pdl90472jFMo+/c9fg3PfktlsLw5/xwQxa5tzB3ra4Y8hElCzgPML9sehoaDrZ8zrbVkEEAi6/m9NA8OFBEPJYY3Vijkx3hf7r9ZkyL91V2JCFQrAMIH2W5mHrGSxEV1+7QfU7rGhXZS1WjGjLOCdmnJzucGFE1kM4FaMnpPofPObYQv3dBocNxHFeVafpPDO1mklIl7Vd2i/ug/SzeEVH29L4REGkq87LHyzCVPU/3VgbfJxfGP5s4Yz4RUZiGaAckuuOvTpQrK+m8ta5i9DPJGs2JVz3O6NDk7mY2MqehKsTmgio5joQXTlyeeaQq9fHsrvrsKxFAGHDNV8hoThzA1snkdalW81RMSEMxN5zVpLWOUmdUmBsk/kZTfReX4CJJpVuGYs3Pzmj5m8H1oUkh7v/HskRmq47/I2VU7JSuW6IM8AwL6qCXUkxmYBqEm+6BCRF1FMisGZRNjhmLVPqFgoYQU9KMZk1uPct9DJ8N4qPlNXVpWxLGXpaywXkXlItDoPG77keIyjjze+rEcznZydfTo95vlXJZFTpFUHqQJfNoN+iHiUMwNRi08E2gHf0k1xLs0xaDgF5gL64pAGMsPzwA3kByMtZReZNVtTbAd0 4MGeGd/s pGDGIDHTYWV8KMOEdd38FtINbI1qGX3zdB/n5Hgjgol/6h/XVkqn9M/i5chD2jYYBLQ5TQCrzo+ppkj5GhpRbCENqjgx1GxRNzmRyj43QiAHZjhTSvMPAtkhe3/MHmH2uJQtd2dXrKomdlgG72ofIaepMyPH7P7EQAF1SYhdR4K+OWmJrB9SY6XHx6LuNrDxgqLjRc7EmLDjtJe7NZas+LoUw1ANn3KDpOw6PYb5vg0ub5T2oomf338cf1n1DEBxWmvihAe/X98BliziTXNaOc0w3s57e56XvtE2SLqbwhMjKqOD/kJa+8nv1+lLb3HFBgkHcCr19FhK8G2TYiATDdvFx+7QnkxqZ5T/G0uT/Dzr2ss6hNr8bFv/xWTO6e0bti2s5BcwCTt/aj7s30lAVsCSs7LF59B03Qjxbb+PHCpeodlatLunvZUx8KOtrdln51/lJpR4mONWv7bs= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Message-ID: <20230531113753.kd2L57jrTN6jQGWtoAaDweMmp9QNMuE0upq3r-OJ3U4@z> The zram writeback code uses bio_add_page() to add a page to a newly created bio. bio_add_page() can fail, but the return value is never checked. Use __bio_add_page() as adding a single page to a newly created bio is guaranteed to succeed. This brings us a step closer to marking bio_add_page() as __must_check. Reviewed-by: Damien Le Moal Reviewed-by: Sergey Senozhatsky Signed-off-by: Johannes Thumshirn --- drivers/block/zram/zram_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index f6d90f1ba5cf..b86691d2133e 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -700,7 +700,7 @@ static ssize_t writeback_store(struct device *dev, bio_init(&bio, zram->bdev, &bio_vec, 1, REQ_OP_WRITE | REQ_SYNC); bio.bi_iter.bi_sector = blk_idx * (PAGE_SIZE >> 9); - bio_add_page(&bio, page, PAGE_SIZE, 0); + __bio_add_page(&bio, page, PAGE_SIZE, 0); /* * XXX: A single page IO would be inefficient for write -- 2.40.1