linux-kernel - Re: [PATCH] Remove two unneeded exports and make two symbols static in fs/mpage.c

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Message-ID: <20090331043836.GA5979@skywalker>
Date:	Tue, 31 Mar 2009 10:08:36 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Dmitri Vorobiev <dmitri.vorobiev@...ial.com>
Cc:	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, tytso@....edu, adilger@....com,
	linux-ext4@...r.kernel.org, alex@...sterfs.com
Subject: Re: [PATCH] Remove two unneeded exports and make two symbols
	static in fs/mpage.c

On Tue, Mar 31, 2009 at 12:41:20AM +0300, Dmitri Vorobiev wrote:
> Commit 29a814d2ee0e43c2980f33f91c1311ec06c0aa35 (vfs: add hooks for
> ext4's delayed allocation support) exported the following functions
> 
> mpage_bio_submit()
> __mpage_writepage()
> 
> for the benefit of ext4's delayed allocation support. Since commit
> a1d6cc563bfdf1bf2829d3e6ce4d8b774251796b (ext4: Rework the
> ext4_da_writepages() function), these functions are not used by the
> ext4 driver anymore. However, the now unnecessary exports still
> remain, and this patch removes those. Moreover, these two functions
> can become static again.
> 
> The issue was spotted by namespacecheck.
> 
> Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@...ial.com>

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>

> ---
>  fs/mpage.c            |   13 +++++++++----
>  include/linux/mpage.h |   10 ----------
>  2 files changed, 9 insertions(+), 14 deletions(-)
> 
> diff --git a/fs/mpage.c b/fs/mpage.c
> index 16c3ef3..680ba60 100644
> --- a/fs/mpage.c
> +++ b/fs/mpage.c
> @@ -82,7 +82,7 @@ static void mpage_end_io_write(struct bio *bio, int err)
>  	bio_put(bio);
>  }
> 
> -struct bio *mpage_bio_submit(int rw, struct bio *bio)
> +static struct bio *mpage_bio_submit(int rw, struct bio *bio)
>  {
>  	bio->bi_end_io = mpage_end_io_read;
>  	if (rw == WRITE)
> @@ -90,7 +90,6 @@ struct bio *mpage_bio_submit(int rw, struct bio *bio)
>  	submit_bio(rw, bio);
>  	return NULL;
>  }
> -EXPORT_SYMBOL(mpage_bio_submit);
> 
>  static struct bio *
>  mpage_alloc(struct block_device *bdev,
> @@ -439,7 +438,14 @@ EXPORT_SYMBOL(mpage_readpage);
>   * just allocate full-size (16-page) BIOs.
>   */
> 
> -int __mpage_writepage(struct page *page, struct writeback_control *wbc,
> +struct mpage_data {
> +	struct bio *bio;
> +	sector_t last_block_in_bio;
> +	get_block_t *get_block;
> +	unsigned use_writepage;
> +};
> +
> +static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
>  		      void *data)
>  {
>  	struct mpage_data *mpd = data;
> @@ -648,7 +654,6 @@ out:
>  	mpd->bio = bio;
>  	return ret;
>  }
> -EXPORT_SYMBOL(__mpage_writepage);
> 
>  /**
>   * mpage_writepages - walk the list of dirty pages of the given address space & writepage() all of them
> diff --git a/include/linux/mpage.h b/include/linux/mpage.h
> index 5c42821..068a0c9 100644
> --- a/include/linux/mpage.h
> +++ b/include/linux/mpage.h
> @@ -11,21 +11,11 @@
>   */
>  #ifdef CONFIG_BLOCK
> 
> -struct mpage_data {
> -	struct bio *bio;
> -	sector_t last_block_in_bio;
> -	get_block_t *get_block;
> -	unsigned use_writepage;
> -};
> -
>  struct writeback_control;
> 
> -struct bio *mpage_bio_submit(int rw, struct bio *bio);
>  int mpage_readpages(struct address_space *mapping, struct list_head *pages,
>  				unsigned nr_pages, get_block_t get_block);
>  int mpage_readpage(struct page *page, get_block_t get_block);
> -int __mpage_writepage(struct page *page, struct writeback_control *wbc,
> -		      void *data);
>  int mpage_writepages(struct address_space *mapping,
>  		struct writeback_control *wbc, get_block_t get_block);
>  int mpage_writepage(struct page *page, get_block_t *get_block,
> -- 
> 1.5.6.3
> 
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