[V2,1/2] QUOTA cleanup: Use inode->i_blkbits to get block bits

quota: Use inode->i_blkbits to get block bits

From: Mingming Cao <cmm@us.ibm.com>

Andrew has suggested to use inode->i_blkbits to get the block bits info,
rather than use super block's blockbits. That should be faster and emit
less code.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
---
 include/linux/quotaops.h |   22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)



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On Fri 12-12-08 12:48:06, Mingming Cao wrote:
> quota: Use inode->i_blkbits to get block bits
> 
> From: Mingming Cao <cmm@us.ibm.com>
> 
> Andrew has suggested to use inode->i_blkbits to get the block bits info,
> rather than use super block's blockbits. That should be faster and emit
> less code.
> 
> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
  Acked-by: Jan Kara <jack@suse.cz>

									Honza

> ---
>  include/linux/quotaops.h |   22 ++++++++--------------
>  1 file changed, 8 insertions(+), 14 deletions(-)
> 
> Index: linux-2.6.28-rc2/include/linux/quotaops.h
> ===================================================================
> --- linux-2.6.28-rc2.orig/include/linux/quotaops.h	2008-12-12 12:21:49.000000000 -0800
> +++ linux-2.6.28-rc2/include/linux/quotaops.h	2008-12-12 12:32:21.000000000 -0800
> @@ -398,39 +398,33 @@ static inline void vfs_dq_free_space(str
>  
>  static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
>  {
> -	return vfs_dq_prealloc_space_nodirty(inode,
> -			nr << inode->i_sb->s_blocksize_bits);
> +	return vfs_dq_prealloc_space_nodirty(inode, nr << inode->i_blkbits);
>  }
>  
>  static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
>  {
> -	return vfs_dq_prealloc_space(inode,
> -			nr << inode->i_sb->s_blocksize_bits);
> +	return vfs_dq_prealloc_space(inode, nr << inode->i_blkbits);
>  }
>  
>  static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
>  {
> - 	return vfs_dq_alloc_space_nodirty(inode,
> -			nr << inode->i_sb->s_blocksize_bits);
> + 	return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_blkbits);
>  }
>  
>  
>  static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
>  {
> -	return vfs_dq_alloc_space(inode,
> -			nr << inode->i_sb->s_blocksize_bits);
> +	return vfs_dq_alloc_space(inode, nr << inode->i_blkbits);
>  }
>  
>  static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
>  {
> -	return vfs_dq_reserve_space(inode,
> -			nr << inode->i_blkbits);
> +	return vfs_dq_reserve_space(inode, nr << inode->i_blkbits);
>  }
>  
>  static inline int vfs_dq_claim_block(struct inode *inode, qsize_t nr)
>  {
> -	return vfs_dq_claim_space(inode,
> -			nr << inode->i_blkbits);
> +	return vfs_dq_claim_space(inode, nr << inode->i_blkbits);
>  }
>  
>  static inline
> @@ -441,12 +435,12 @@ void vfs_dq_release_reservation_block(st
>  
>  static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
>  {
> -	vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
> +	vfs_dq_free_space_nodirty(inode, nr << inode->i_blkbits);
>  }
>  
>  static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
>  {
> -	vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
> +	vfs_dq_free_space(inode, nr << inode->i_blkbits);
>  }
>  
>  /*
> 
>