linux-kernel - Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool

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Date:   Tue, 23 Jul 2019 22:30:53 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     john.hubbard@...il.com
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Anna Schumaker <anna.schumaker@...app.com>,
        "David S . Miller" <davem@...emloft.net>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Eric Van Hensbergen <ericvh@...il.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Jason Wang <jasowang@...hat.com>, Jens Axboe <axboe@...nel.dk>,
        Latchesar Ionkov <lucho@...kov.net>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Christoph Hellwig <hch@....de>,
        Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>, ceph-devel@...r.kernel.org,
        kvm@...r.kernel.org, linux-block@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-nfs@...r.kernel.org, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, samba-technical@...ts.samba.org,
        v9fs-developer@...ts.sourceforge.net,
        virtualization@...ts.linux-foundation.org,
        John Hubbard <jhubbard@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Jérôme Glisse <jglisse@...hat.com>,
        Minwoo Im <minwoo.im.dev@...il.com>
Subject: Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of
 bool

On Tue, Jul 23, 2019 at 09:25:09PM -0700, john.hubbard@...il.com wrote:
> From: John Hubbard <jhubbard@...dia.com>
> 
> In commit d241a95f3514 ("block: optionally mark pages dirty in
> bio_release_pages"), new "bool mark_dirty" argument was added to
> bio_release_pages.
> 
> In upcoming work, another bool argument (to indicate that the pages came
> from get_user_pages) is going to be added. That's one bool too many,
> because it's not desirable have calls of the form:

All pages releases by bio_release_pages should come from
get_get_user_pages, so I don't really see the point here.