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Message-ID: <20230131134521.GA24165@lst.de>
Date:   Tue, 31 Jan 2023 14:45:21 +0100
From:   Christoph Hellwig <hch@....de>
To:     Bart Van Assche <bvanassche@....org>
Cc:     Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        Ilya Dryomov <idryomov@...il.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Keith Busch <kbusch@...nel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        David Howells <dhowells@...hat.com>,
        Marc Dionne <marc.dionne@...istor.com>,
        Xiubo Li <xiubli@...hat.com>, Steve French <sfrench@...ba.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Mike Marshall <hubcap@...ibond.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-block@...r.kernel.org, ceph-devel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-nvme@...ts.infradead.org, linux-scsi@...r.kernel.org,
        target-devel@...r.kernel.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org, linux-afs@...ts.infradead.org,
        linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
        devel@...ts.orangefs.org, io-uring@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 01/23] block: factor out a bvec_set_page helper

On Mon, Jan 30, 2023 at 09:09:23AM -0800, Bart Van Assche wrote:
> Has it been considered to use structure assignment instead of introducing 
> bvec_set_page(), e.g. as follows?
>
> bip->bip_vec[bip->bip_vcnt] = (struct bio_vec) {
>       .bv_page = page, .bv_len = len, .bv_offset = offset };

Unless it's hidden behind a macro it doesn't solve the problem of
abstraction away the layout.  I'm also find it less readable.

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