Re: [PATCH] vfs/dedupe: Pass file pointer to read_mapping_page

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On Tue, May 11, 2021 at 08:40:56AM -0700, Darrick J. Wong wrote:
> > -static int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
> > -					 struct inode *dest, loff_t destoff,
> > +static int vfs_dedupe_file_range_compare(struct file *src, loff_t srcoff,
> > +					 struct file *dst, loff_t destoff,
> 
> I kinda wish you'd maintained the name pairing here.  Why does destoff
> go with dst instead of dst/dstoff or dest/destoff?
> 
> FWIW I try to vary the name lengths for similar variables these days,
> because while my eyes are /fairly/ quick to distingiush 's' and 'd',
> they're even faster if the width of the entire word is different.
> 
> (And yes, I had to break myself of the 'columns-must-line-up' habit.)
> 
> Using this method I've caught a few stupid variable name mixups in the
> exchange-range code by doing a quick scan while ld takes an eternity to
> link vmlinux together.

OK, if that's a preference you have, I'll redo it.  I have a later patch
as part of the folio work which rename destfoo to dstfoo, but now I know
that's a preference you have, I'll go back to dest.

> That aside, passing file pointers in seems like a good idea to me.

Cheers.  v2 coming up.



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