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From:   David Howells <dhowells@redhat.com>
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References: <Y8V1n4e/eeOd4n8/@infradead.org> <2117829.1673884910@warthog.procyon.org.uk>
To:     Christoph Hellwig <hch@infradead.org>
Cc:     dhowells@redhat.com, Jens Axboe <axboe@kernel.dk>,
        linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
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Subject: Re: Is there a reason why REQ_OP_READ has to be 0?
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Date:   Mon, 16 Jan 2023 16:17:34 +0000
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Aha!

The problem is that whilst aio, io_uring and cachefiles set IOCB_WRITE when
giving a write op to the VFS, the write() syscall does not...

David