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Re: [Cluster-devel] [GFS2 Patch] GFS2: Eliminate unused "new" parameter to gfs2_meta_indirect_buffer



Hi,

That looks like a nice clean up. Now in the -nmw tree. Thanks,

Steve.

On Thu, 2012-05-10 at 08:33 -0400, Bob Peterson wrote:
> Hi,
> 
> It turns out that the "new" parameter to function gfs2_meta_indirect_buffer
> was always being passed in as zero. Therefore, this patch eliminates it
> and simplifies the function.
> 
> Regards,
> 
> Bob Peterson
> Red Hat File Systems
> 
> Signed-off-by: Bob Peterson <rpeterso redhat com> 
> ---
> Author: Bob Peterson <rpeterso redhat com>
> Date:   Wed May 9 14:48:26 2012 -0500
> 
> GFS2: Eliminate unused "new" parameter to gfs2_meta_indirect_buffer
> 
> The "new" parameter passed in to function gfs2_meta_indirect_buffer
> was always passed in as zero. This patch eliminates it and removes
> the branch that checked for a non-zero value.
> 
> diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
> index 31c5e81..f6e9bf0 100644
> --- a/fs/gfs2/bmap.c
> +++ b/fs/gfs2/bmap.c
> @@ -324,7 +324,7 @@ static int lookup_metapath(struct gfs2_inode *ip, struct metapath *mp)
>  		if (!dblock)
>  			return x + 1;
>  
> -		ret = gfs2_meta_indirect_buffer(ip, x+1, dblock, 0, &mp->mp_bh[x+1]);
> +		ret = gfs2_meta_indirect_buffer(ip, x+1, dblock, &mp->mp_bh[x+1]);
>  		if (ret)
>  			return ret;
>  	}
> @@ -882,7 +882,7 @@ static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,
>  		top = (__be64 *)(bh->b_data + sizeof(struct gfs2_dinode)) + mp->mp_list[0];
>  		bottom = (__be64 *)(bh->b_data + sizeof(struct gfs2_dinode)) + sdp->sd_diptrs;
>  	} else {
> -		error = gfs2_meta_indirect_buffer(ip, height, block, 0, &bh);
> +		error = gfs2_meta_indirect_buffer(ip, height, block, &bh);
>  		if (error)
>  			return error;
>  
> diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
> index 7f69ae2..6c1e5d1 100644
> --- a/fs/gfs2/meta_io.c
> +++ b/fs/gfs2/meta_io.c
> @@ -374,33 +374,24 @@ void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen)
>   * @ip: The GFS2 inode
>   * @height: The level of this buf in the metadata (indir addr) tree (if any)
>   * @num: The block number (device relative) of the buffer
> - * @new: Non-zero if we may create a new buffer
>   * @bhp: the buffer is returned here
>   *
>   * Returns: errno
>   */
>  
>  int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
> -			      int new, struct buffer_head **bhp)
> +			      struct buffer_head **bhp)
>  {
>  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
>  	struct gfs2_glock *gl = ip->i_gl;
>  	struct buffer_head *bh;
>  	int ret = 0;
> +	u32 mtype = height ? GFS2_METATYPE_IN : GFS2_METATYPE_DI;
>  
> -	if (new) {
> -		BUG_ON(height == 0);
> -		bh = gfs2_meta_new(gl, num);
> -		gfs2_trans_add_bh(ip->i_gl, bh, 1);
> -		gfs2_metatype_set(bh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
> -		gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
> -	} else {
> -		u32 mtype = height ? GFS2_METATYPE_IN : GFS2_METATYPE_DI;
> -		ret = gfs2_meta_read(gl, num, DIO_WAIT, &bh);
> -		if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) {
> -			brelse(bh);
> -			ret = -EIO;
> -		}
> +	ret = gfs2_meta_read(gl, num, DIO_WAIT, &bh);
> +	if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) {
> +		brelse(bh);
> +		ret = -EIO;
>  	}
>  	*bhp = bh;
>  	return ret;
> diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
> index 22c5265..c30973b 100644
> --- a/fs/gfs2/meta_io.h
> +++ b/fs/gfs2/meta_io.h
> @@ -65,12 +65,12 @@ void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr,
>  void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
>  
>  int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
> -			      int new, struct buffer_head **bhp);
> +			      struct buffer_head **bhp);
>  
>  static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
>  					 struct buffer_head **bhp)
>  {
> -	return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, 0, bhp);
> +	return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, bhp);
>  }
>  
>  struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
> 



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