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Mon, 16 May 2022 13:39:24 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20220516133924eusmtrp2253fa48c94ce75c557e02eed2bde92ce~vmYAt3p8V2487324873eusmtrp2W; Mon, 16 May 2022 13:39:24 +0000 (GMT) X-AuditID: cbfec7f2-e7fff70000002719-d1-6282540c215b Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id BD.F8.09404.B0452826; Mon, 16 May 2022 14:39:23 +0100 (BST) Received: from CAMSVWEXC01.scsc.local (unknown [106.1.227.71]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220516133923eusmtip2914598b7fb7adcf22231e7d26d1c0a73~vmYAj0utC1834618346eusmtip2e; Mon, 16 May 2022 13:39:23 +0000 (GMT) Received: from localhost (106.110.32.130) by CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 16 May 2022 14:39:23 +0100 From: Pankaj Raghav To: , , , , , , , CC: , , , , Keith Busch , , , Johannes Thumshirn , "Josef Bacik" , , Alasdair Kergon , , Jens Axboe , "Sagi Grimberg" , , , Chaitanya Kulkarni , , Chris Mason , Pankaj Raghav , Luis Chamberlain , Hannes Reinecke Subject: [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Date: Mon, 16 May 2022 15:39:09 +0200 Message-ID: <20220516133921.126925-2-p.raghav@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220516133921.126925-1-p.raghav@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [106.110.32.130] X-ClientProxiedBy: CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) To CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) X-Brightmail-Tracker: H4sIAAAAAAAAA02SfUxTZxTG8957e3tprF4q6BtAl1TdFsyYHYt7HWxOQ7K7sWzGj8WRLfNS 7oBYUFuKOONW+cpEPgqbMIoLU5kgoEUoDLRAabAFLYLlI9BFTcPHCBPEViMdFEe9uPDf75zn Oe9zTvJSuKSaDKISk1M4ZTKrkJIiosniufvWqv3psdsejgQj/W0Ljl4YLSSquV9AouJZD46K Cn4VovmeXhy1zpQJUN/caQwZLxZh6ErNLQyN6XU4yjXNEsib82Cpl+nE0YJThpxPHQQqMg8B ND6ow1CrYyuyj1YJkbG1m0D9N86TqPzyuBBps5/haFg7DlChtUGArv3zmEBdjuCPQpj+gWhm sauWZAozZoRM74PrBNPfo2bqq8+QzAXNOZxpqPiRuTmiIZm8jBmSacl6KGAetw2SjN4wSDAN d04y2obrAsZdv3GPf4woMo5TJKZyyrc/PCRKyL90ERwtDUgzuX/GNMBB5wA/CtLvwrmi55iP JXQVgDXlqTlAtMRPAWzMH8T5wg3gcHel8NXEv4VZQl6oBNDU9oj439U+OQf4wgBg9YBtSaEo kg6Fp8+8nAigOwD09FVhvgKnbwugy9uJ+UxraTm0V4b7Igh6C3w2kwV8LKbfh01z88vRr8FS +3Ohz+5HR0BX/k7e4g+7S8cIH+NLlozGMpxnCDsmJ3GfHdJSWNYfxr9yCl612F6uA+l7Ipit bSd5IQrqb15b5rVwympYjg2BL1rKMZ5PwvHheZwfzgSwoEVP8gERMN+m4D274C/NIwTfXg2H p/35dVbDoqaS5XXE8KdsiRZs1q04QLfiAN2KA34HeDVYz6lVSfGcSpbMHQ9TsUkqdXJ8mPxI Uj1Y+s53Fq2uZvDb1JMwM8AoYAaQwqUB4m1pmliJOI498T2nPPKtUq3gVGYQTBHS9WJ5Yh0r oePZFO4wxx3llK9UjPIL0mA7PqvtXNeZ5nY6N02VxJS7jP2JadvtgW15Iqc5e+Lv0b49Z6MT G1Ki/jK9sWVnWfgH9xMEpyTTtoC41K7Z3e3rGvcVFG/IdG/slV0GjU+aD83jsTEzrxfbLXFv pqZHZRyrOBe9Y3ueQ9uTbcGTHiVExBgpmfzKlyHH9R9XKJjvRvdfna6jOrxJBj8zqvvKsm/V 4q2FPw8GbCCHJu1315QLTDCUTMk7nD5kG26vE0eumXBsjg6fuPG5bcqz68DXQbnvpQyIMqzJ f7xzfm+7fOvsPdbk8gZ/M7bpUpM10JB24lhtiWJ3ri7ykwnDwQOfBqqtfmf3ekWeXrbzhy8W LgSypVYpoUpgZaG4UsX+B1fD49w9BAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrMKsWRmVeSWpSXmKPExsVy+t/xe7o8IU1JBuscLNafOsZs8X/PMTaL 1Xf72SymffjJbDGpfwa7xe+z55kt9r6bzWpx4Ucjk8WeRZOYLFauPspk8WT9LGaLngMfWCz+ dt0DirU8ZLb489DQ4uGXWywWkw5dY7R4enUWk8XeW9oWlx6vYLfYs/cki8XlXXPYLOYve8pu MaHtK7PFjQlPGS0mHt/MarHu9XsWixO3pB1kPC5f8fb4d2INm8fE5nfsHufvbWTxuHy21GPT qk42j4UNU5k9Ni+p99h9s4HNo7f5HZvHztb7rB7v911l81i/5SqLx+bT1R4TNm9k9fi8SS5A MErPpii/tCRVISO/uMRWKdrQwkjP0NJCz8jEUs/Q2DzWyshUSd/OJiU1J7MstUjfLkEvo2/x IsaCmSIVBz5PZmpgvCXQxcjJISFgIvFrYit7FyMXh5DAUkaJeRsesUAkZCQ+XfnIDmELS/y5 1sUGUfSRUaL77HoWCGcLo8S1hs2sXYwcHGwCWhKNnWCTRAQOMkr8vLCCCcRhFjjFKvHz+Bew scICiRKzfrwHG8sioCrx9V0rI4jNK2Alse3Hb6h18hIzL31nBxnKKWAt8anPHsQUAipZ/6YI olpQ4uTMJ2ATmYGqm7fOZoawJSQOvnjBDFIuIaAkMfuyHsTAWolX93czTmAUmYWkexaS7llI uhcwMq9iFEktLc5Nzy020itOzC0uzUvXS87P3cQITF3bjv3csoNx5auPeocYmTgYDzFKcDAr ifAaVDQkCfGmJFZWpRblxxeV5qQWH2I0BXpyIrOUaHI+MHnmlcQbmhmYGpqYWRqYWpoZK4nz ehZ0JAoJpCeWpGanphakFsH0MXFwSjUwmQr9iUw/e0nf+tSnt6ynug+pnNI79T+xwvf034qz Hx79CLmyMCXo/pv7M4TW/NX87cRjvrVS+3Tm4ckpBz9E736VcMdr0kMmC88S/hPLWDfOv39n 0ZPwBanL0mdsb3FS+XqrfvbsI44Bsbaap9s1ND9mXMhJq3275rHdXK6/76rXfOLQflB7IIlt xdML52fcW9y9+WugrnZMzPHkgOo7HKtme22XV+k+3mKXuc2g8tmaEPslTrobTl6bdKq4tnfT 8+nv72bNijrsvL9K9Mts79R1p90f3paqrLY9xxzsuvvVm1cP/1y5fCy14llm+detJqF7n59X esqfLVC35feLKQ+UzJXfGi48f/aF8NzlOWxFSizFGYmGWsxFxYkARGhRPuYDAAA= X-CMS-MailID: 20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe X-Msg-Generator: CA X-RootMTR: 20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe References: <20220516133921.126925-1-p.raghav@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Adapt blkdev_nr_zones and blk_queue_zone_no function so that it can also work for non-power-of-2 zone sizes. As the existing deployments of zoned devices had power-of-2 assumption, power-of-2 optimized calculation is kept for those devices. There are no direct hot paths modified and the changes just introduce one new branch per call. Reviewed-by: Luis Chamberlain Reviewed by: Adam Manzanares Reviewed-by: Hannes Reinecke Signed-off-by: Pankaj Raghav --- block/blk-zoned.c | 13 ++++++++++--- include/linux/blkdev.h | 8 +++++++- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 38cd840d8..140230134 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -111,16 +111,23 @@ EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); * blkdev_nr_zones - Get number of zones * @disk: Target gendisk * - * Return the total number of zones of a zoned block device. For a block - * device without zone capabilities, the number of zones is always 0. + * Return the total number of zones of a zoned block device, including the + * eventual small last zone if present. For a block device without zone + * capabilities, the number of zones is always 0. */ unsigned int blkdev_nr_zones(struct gendisk *disk) { sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); + sector_t capacity = get_capacity(disk); if (!blk_queue_is_zoned(disk->queue)) return 0; - return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); + + if (is_power_of_2(zone_sectors)) + return (capacity + zone_sectors - 1) >> + ilog2(zone_sectors); + + return div64_u64(capacity + zone_sectors - 1, zone_sectors); } EXPORT_SYMBOL_GPL(blkdev_nr_zones); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1b24c1fb3..22fe512ee 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -675,9 +675,15 @@ static inline unsigned int blk_queue_nr_zones(struct request_queue *q) static inline unsigned int blk_queue_zone_no(struct request_queue *q, sector_t sector) { + sector_t zone_sectors = blk_queue_zone_sectors(q); + if (!blk_queue_is_zoned(q)) return 0; - return sector >> ilog2(q->limits.chunk_sectors); + + if (is_power_of_2(zone_sectors)) + return sector >> ilog2(zone_sectors); + + return div64_u64(sector, zone_sectors); } static inline bool blk_queue_zone_is_seq(struct request_queue *q, -- 2.25.1 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 us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A1ACFC433F5 for ; Mon, 16 May 2022 13:39:36 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-161-3uYY7nlBOKua_JQLWWp-cg-1; Mon, 16 May 2022 09:39:32 -0400 X-MC-Unique: 3uYY7nlBOKua_JQLWWp-cg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 534F4381078C; 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Mon, 16 May 2022 14:39:23 +0100 From: Pankaj Raghav To: , , , , , , , Date: Mon, 16 May 2022 15:39:09 +0200 Message-ID: <20220516133921.126925-2-p.raghav@samsung.com> In-Reply-To: <20220516133921.126925-1-p.raghav@samsung.com> MIME-Version: 1.0 X-Originating-IP: [106.110.32.130] X-ClientProxiedBy: CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) To CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) X-Brightmail-Tracker: H4sIAAAAAAAAA02SfUxTZxTG8957e3tprF4q6BtAl1TdFsyYHYt7HWxOQ7K7sWzGj8WRLfNS 7oBYUFuKOONW+cpEPgqbMIoLU5kgoEUoDLRAabAFLYLlI9BFTcPHCBPEViMdFEe9uPDf75zn Oe9zTvJSuKSaDKISk1M4ZTKrkJIiosniufvWqv3psdsejgQj/W0Ljl4YLSSquV9AouJZD46K Cn4VovmeXhy1zpQJUN/caQwZLxZh6ErNLQyN6XU4yjXNEsib82Cpl+nE0YJThpxPHQQqMg8B ND6ow1CrYyuyj1YJkbG1m0D9N86TqPzyuBBps5/haFg7DlChtUGArv3zmEBdjuCPQpj+gWhm sauWZAozZoRM74PrBNPfo2bqq8+QzAXNOZxpqPiRuTmiIZm8jBmSacl6KGAetw2SjN4wSDAN d04y2obrAsZdv3GPf4woMo5TJKZyyrc/PCRKyL90ERwtDUgzuX/GNMBB5wA/CtLvwrmi55iP JXQVgDXlqTlAtMRPAWzMH8T5wg3gcHel8NXEv4VZQl6oBNDU9oj439U+OQf4wgBg9YBtSaEo kg6Fp8+8nAigOwD09FVhvgKnbwugy9uJ+UxraTm0V4b7Igh6C3w2kwV8LKbfh01z88vRr8FS +3Ohz+5HR0BX/k7e4g+7S8cIH+NLlozGMpxnCDsmJ3GfHdJSWNYfxr9yCl612F6uA+l7Ipit bSd5IQrqb15b5rVwympYjg2BL1rKMZ5PwvHheZwfzgSwoEVP8gERMN+m4D274C/NIwTfXg2H p/35dVbDoqaS5XXE8KdsiRZs1q04QLfiAN2KA34HeDVYz6lVSfGcSpbMHQ9TsUkqdXJ8mPxI Uj1Y+s53Fq2uZvDb1JMwM8AoYAaQwqUB4m1pmliJOI498T2nPPKtUq3gVGYQTBHS9WJ5Yh0r oePZFO4wxx3llK9UjPIL0mA7PqvtXNeZ5nY6N02VxJS7jP2JadvtgW15Iqc5e+Lv0b49Z6MT G1Ki/jK9sWVnWfgH9xMEpyTTtoC41K7Z3e3rGvcVFG/IdG/slV0GjU+aD83jsTEzrxfbLXFv pqZHZRyrOBe9Y3ueQ9uTbcGTHiVExBgpmfzKlyHH9R9XKJjvRvdfna6jOrxJBj8zqvvKsm/V 4q2FPw8GbCCHJu1315QLTDCUTMk7nD5kG26vE0eumXBsjg6fuPG5bcqz68DXQbnvpQyIMqzJ f7xzfm+7fOvsPdbk8gZ/M7bpUpM10JB24lhtiWJ3ri7ykwnDwQOfBqqtfmf3ekWeXrbzhy8W LgSypVYpoUpgZaG4UsX+B1fD49w9BAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrMKsWRmVeSWpSXmKPExsVy+t/xe7o8IU1JBuscLNafOsZs8X/PMTaL 1Xf72SymffjJbDGpfwa7xe+z55kt9r6bzWpx4Ucjk8WeRZOYLFauPspk8WT9LGaLngMfWCz+ dt0DirU8ZLb489DQ4uGXWywWkw5dY7R4enUWk8XeW9oWlx6vYLfYs/cki8XlXXPYLOYve8pu MaHtK7PFjQlPGS0mHt/MarHu9XsWixO3pB1kPC5f8fb4d2INm8fE5nfsHufvbWTxuHy21GPT qk42j4UNU5k9Ni+p99h9s4HNo7f5HZvHztb7rB7v911l81i/5SqLx+bT1R4TNm9k9fi8SS5A MErPpii/tCRVISO/uMRWKdrQwkjP0NJCz8jEUs/Q2DzWyshUSd/OJiU1J7MstUjfLkEvo2/x IsaCmSIVBz5PZmpgvCXQxcjJISFgIvFrYit7FyMXh5DAUkaJeRsesUAkZCQ+XfnIDmELS/y5 1sUGUfSRUaL77HoWCGcLo8S1hs2sXYwcHGwCWhKNnWCTRAQOMkr8vLCCCcRhFjjFKvHz+Bew scICiRKzfrwHG8sioCrx9V0rI4jNK2Alse3Hb6h18hIzL31nBxnKKWAt8anPHsQUAipZ/6YI olpQ4uTMJ2ATmYGqm7fOZoawJSQOvnjBDFIuIaAkMfuyHsTAWolX93czTmAUmYWkexaS7llI uhcwMq9iFEktLc5Nzy020itOzC0uzUvXS87P3cQITF3bjv3csoNx5auPeocYmTgYDzFKcDAr ifAaVDQkCfGmJFZWpRblxxeV5qQWH2I0BXpyIrOUaHI+MHnmlcQbmhmYGpqYWRqYWpoZK4nz ehZ0JAoJpCeWpGanphakFsH0MXFwSjUwmQr9iUw/e0nf+tSnt6ynug+pnNI79T+xwvf034qz Hx79CLmyMCXo/pv7M4TW/NX87cRjvrVS+3Tm4ckpBz9E736VcMdr0kMmC88S/hPLWDfOv39n 0ZPwBanL0mdsb3FS+XqrfvbsI44Bsbaap9s1ND9mXMhJq3275rHdXK6/76rXfOLQflB7IIlt xdML52fcW9y9+WugrnZMzPHkgOo7HKtme22XV+k+3mKXuc2g8tmaEPslTrobTl6bdKq4tnfT 8+nv72bNijrsvL9K9Mts79R1p90f3paqrLY9xxzsuvvVm1cP/1y5fCy14llm+detJqF7n59X esqfLVC35feLKQ+UzJXfGi48f/aF8NzlOWxFSizFGYmGWsxFxYkARGhRPuYDAAA= X-CMS-MailID: 20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe X-Msg-Generator: CA X-RootMTR: 20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20220516133924eucas1p1817f306e3f2442088bf49ab513657cbe References: <20220516133921.126925-1-p.raghav@samsung.com> X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Subject: [dm-devel] [PATCH v4 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jiangbo.365@bytedance.com, linux-nvme@lists.infradead.org, Chris Mason , dm-devel@redhat.com, Alasdair Kergon , bvanassche@acm.org, gost.dev@samsung.com, jonathan.derrick@linux.dev, Pankaj Raghav , Chaitanya Kulkarni , Josef Bacik , Jens Axboe , Keith Busch , matias.bjorling@wdc.com, Sagi Grimberg , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Luis Chamberlain , linux-fsdevel@vger.kernel.org, Johannes Thumshirn , linux-btrfs@vger.kernel.org Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Adapt blkdev_nr_zones and blk_queue_zone_no function so that it can also work for non-power-of-2 zone sizes. As the existing deployments of zoned devices had power-of-2 assumption, power-of-2 optimized calculation is kept for those devices. There are no direct hot paths modified and the changes just introduce one new branch per call. Reviewed-by: Luis Chamberlain Reviewed by: Adam Manzanares Reviewed-by: Hannes Reinecke Signed-off-by: Pankaj Raghav --- block/blk-zoned.c | 13 ++++++++++--- include/linux/blkdev.h | 8 +++++++- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 38cd840d8..140230134 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -111,16 +111,23 @@ EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock); * blkdev_nr_zones - Get number of zones * @disk: Target gendisk * - * Return the total number of zones of a zoned block device. For a block - * device without zone capabilities, the number of zones is always 0. + * Return the total number of zones of a zoned block device, including the + * eventual small last zone if present. For a block device without zone + * capabilities, the number of zones is always 0. */ unsigned int blkdev_nr_zones(struct gendisk *disk) { sector_t zone_sectors = blk_queue_zone_sectors(disk->queue); + sector_t capacity = get_capacity(disk); if (!blk_queue_is_zoned(disk->queue)) return 0; - return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors); + + if (is_power_of_2(zone_sectors)) + return (capacity + zone_sectors - 1) >> + ilog2(zone_sectors); + + return div64_u64(capacity + zone_sectors - 1, zone_sectors); } EXPORT_SYMBOL_GPL(blkdev_nr_zones); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1b24c1fb3..22fe512ee 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -675,9 +675,15 @@ static inline unsigned int blk_queue_nr_zones(struct request_queue *q) static inline unsigned int blk_queue_zone_no(struct request_queue *q, sector_t sector) { + sector_t zone_sectors = blk_queue_zone_sectors(q); + if (!blk_queue_is_zoned(q)) return 0; - return sector >> ilog2(q->limits.chunk_sectors); + + if (is_power_of_2(zone_sectors)) + return sector >> ilog2(zone_sectors); + + return div64_u64(sector, zone_sectors); } static inline bool blk_queue_zone_is_seq(struct request_queue *q, -- 2.25.1 -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel