[Cluster-devel] [PATCH] GFS2: Remove unused argument from gfs2_internal_read

[Steven Whitehouse]

Hi,

Now in the -nmw git tree. Thanks,

Steve.

On Mon, 2012-04-16 at 16:40 +0100, Andrew Price wrote:
> gfs2_internal_read accepts an unused ra_state argument, left over from
> when we did readahead on the rindex. Since there are currently no plans
> to add back this readahead, this patch removes the ra_state parameter
> and updates the functions which call gfs2_internal_read accordingly.
> 
> Signed-off-by: Andrew Price <anprice at redhat.com>
> ---
>  fs/gfs2/aops.c  |    5 ++---
>  fs/gfs2/inode.h |    1 -
>  fs/gfs2/quota.c |    4 ++--
>  fs/gfs2/rgrp.c  |   17 +++++------------
>  4 files changed, 9 insertions(+), 18 deletions(-)
> 
> diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
> index 56dc1f0..2f67a17 100644
> --- a/fs/gfs2/aops.c
> +++ b/fs/gfs2/aops.c
> @@ -517,15 +517,14 @@ out:
>  /**
>   * gfs2_internal_read - read an internal file
>   * @ip: The gfs2 inode
> - * @ra_state: The readahead state (or NULL for no readahead)
>   * @buf: The buffer to fill
>   * @pos: The file position
>   * @size: The amount to read
>   *
>   */
>  
> -int gfs2_internal_read(struct gfs2_inode *ip, struct file_ra_state *ra_state,
> -                       char *buf, loff_t *pos, unsigned size)
> +int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos,
> +                       unsigned size)
>  {
>  	struct address_space *mapping = ip->i_inode.i_mapping;
>  	unsigned long index = *pos / PAGE_CACHE_SIZE;
> diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
> index 5d345b4..c53c747 100644
> --- a/fs/gfs2/inode.h
> +++ b/fs/gfs2/inode.h
> @@ -17,7 +17,6 @@
>  
>  extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
>  extern int gfs2_internal_read(struct gfs2_inode *ip,
> -			      struct file_ra_state *ra_state,
>  			      char *buf, loff_t *pos, unsigned size);
>  extern void gfs2_set_aops(struct inode *inode);
>  
> diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> index 6019da3..45d9171 100644
> --- a/fs/gfs2/quota.c
> +++ b/fs/gfs2/quota.c
> @@ -652,7 +652,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
>  	}
>  
>  	memset(&q, 0, sizeof(struct gfs2_quota));
> -	err = gfs2_internal_read(ip, NULL, (char *)&q, &loc, sizeof(q));
> +	err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
>  	if (err < 0)
>  		return err;
>  
> @@ -852,7 +852,7 @@ static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
>  
>  	memset(&q, 0, sizeof(struct gfs2_quota));
>  	pos = qd2offset(qd);
> -	error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q));
> +	error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
>  	if (error < 0)
>  		return error;
>  
> diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
> index 7a1cf67..b550e5c 100644
> --- a/fs/gfs2/rgrp.c
> +++ b/fs/gfs2/rgrp.c
> @@ -541,16 +541,14 @@ u64 gfs2_ri_total(struct gfs2_sbd *sdp)
>  	struct inode *inode = sdp->sd_rindex;
>  	struct gfs2_inode *ip = GFS2_I(inode);
>  	char buf[sizeof(struct gfs2_rindex)];
> -	struct file_ra_state ra_state;
>  	int error, rgrps;
>  
> -	file_ra_state_init(&ra_state, inode->i_mapping);
>  	for (rgrps = 0;; rgrps++) {
>  		loff_t pos = rgrps * sizeof(struct gfs2_rindex);
>  
>  		if (pos + sizeof(struct gfs2_rindex) > i_size_read(inode))
>  			break;
> -		error = gfs2_internal_read(ip, &ra_state, buf, &pos,
> +		error = gfs2_internal_read(ip, buf, &pos,
>  					   sizeof(struct gfs2_rindex));
>  		if (error != sizeof(struct gfs2_rindex))
>  			break;
> @@ -586,14 +584,12 @@ static int rgd_insert(struct gfs2_rgrpd *rgd)
>  
>  /**
>   * read_rindex_entry - Pull in a new resource index entry from the disk
> - * @ip: The GFS2 inode
> - * @ra_state: The read-ahead state
> + * @ip: Pointer to the rindex inode
>   *
>   * Returns: 0 on success, > 0 on EOF, error code otherwise
>   */
>  
> -static int read_rindex_entry(struct gfs2_inode *ip,
> -			     struct file_ra_state *ra_state)
> +static int read_rindex_entry(struct gfs2_inode *ip)
>  {
>  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
>  	loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
> @@ -604,7 +600,7 @@ static int read_rindex_entry(struct gfs2_inode *ip,
>  	if (pos >= i_size_read(&ip->i_inode))
>  		return 1;
>  
> -	error = gfs2_internal_read(ip, ra_state, (char *)&buf, &pos,
> +	error = gfs2_internal_read(ip, (char *)&buf, &pos,
>  				   sizeof(struct gfs2_rindex));
>  
>  	if (error != sizeof(struct gfs2_rindex))
> @@ -660,13 +656,10 @@ fail:
>  static int gfs2_ri_update(struct gfs2_inode *ip)
>  {
>  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
> -	struct inode *inode = &ip->i_inode;
> -	struct file_ra_state ra_state;
>  	int error;
>  
> -	file_ra_state_init(&ra_state, inode->i_mapping);
>  	do {
> -		error = read_rindex_entry(ip, &ra_state);
> +		error = read_rindex_entry(ip);
>  	} while (error == 0);
>  
>  	if (error < 0)