linux-kernel - Re: [PATCH v2 2/7] block: rewrite __bio_copy

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Message-ID: <20150115171058.GA28208@infradead.org>
Date:	Thu, 15 Jan 2015 09:10:58 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Dongsu Park <dongsu.park@...fitbricks.com>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Kent Overstreet <kmo@...erainc.com>,
	Jens Axboe <axboe@...nel.dk>, Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v2 2/7] block: rewrite __bio_copy_iov()

> +/**
> + * __bio_copy_iov - copy all pages between bio and iov_iter
> + * @bio: The &struct bio which describes the I/O
> + * @iter: iov_iter either as source or destination
> + * @to_iov: whether to %READ (0) or %WRITE (1)
> + *
> + * Simple wrapper around __bio_copy_iov_{write,read}().
> + * Returns 0 on success, or the error returned as-is on failure.
> + */
> +static inline int __bio_copy_iov(struct bio *bio, struct iov_iter iter,
> +				 int to_iov)
> +{
> +	if (to_iov == WRITE)
> +		return __bio_copy_iov_write(bio, iter);
> +	else
> +		return __bio_copy_iov_read(bio, iter);
>  }

No need to keep this wrapper..

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