Re: [PATCH 30/49] ext4: Convert truncate_mutex to read write semaphore.

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

On Wed, Jan 23, 2008 at 02:06:59PM -0800, Andrew Morton wrote:
> > On Mon, 21 Jan 2008 22:02:09 -0500 "Theodore Ts'o" <tytso@MIT.EDU> wrote:
> > +int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
> > +			unsigned long max_blocks, struct buffer_head *bh,
> > +			int create, int extend_disksize)
> > +{
> > +	int retval;
> > +	if (create) {
> > +		down_write((&EXT4_I(inode)->i_data_sem));
> > +	} else {
> > +		down_read((&EXT4_I(inode)->i_data_sem));
> > +	}
> > +	if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
> > +		retval =  ext4_ext_get_blocks(handle, inode, block, max_blocks,
> > +				bh, create, extend_disksize);
> > +	} else {
> > +		retval = ext4_get_blocks_handle(handle, inode, block,
> > +				max_blocks, bh, create, extend_disksize);
> > +	}
> > +	if (create) {
> > +		up_write((&EXT4_I(inode)->i_data_sem));
> > +	} else {
> > +		up_read((&EXT4_I(inode)->i_data_sem));
> > +	}
> 
> This function has many unneeded braces.  checkpatch used to detect this
> but it seems to have broken.

The follow up patch "ext4: Take read lock during overwrite case" removes
those single line if statement.


> 
> > +	return retval;
> > +}
> >  static int ext4_get_block(struct inode *inode, sector_t iblock,
> >  			struct buffer_head *bh_result, int create)
> 
> Mising newline.

Fixed.

-aneesh