Re: [PATCH v7 06/24] mm: Rename various 'offset' parameters to 'index'

[John Hubbard]

On 2/19/20 1:00 PM, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
> 
> The word 'offset' is used ambiguously to mean 'byte offset within
> a page', 'byte offset from the start of the file' and 'page offset
> from the start of the file'.  Use 'index' to mean 'page offset
> from the start of the file' throughout the readahead code.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> ---
>  mm/readahead.c | 86 ++++++++++++++++++++++++--------------------------
>  1 file changed, 42 insertions(+), 44 deletions(-)
> 
> diff --git a/mm/readahead.c b/mm/readahead.c
> index 6a9d99229bd6..096cf9020648 100644
> --- a/mm/readahead.c
> +++ b/mm/readahead.c
> @@ -156,7 +156,7 @@ static void read_pages(struct readahead_control *rac, struct list_head *pages,
>   * We really don't want to intermingle reads and writes like that.
>   */
>  void __do_page_cache_readahead(struct address_space *mapping,
> -		struct file *filp, pgoff_t offset, unsigned long nr_to_read,
> +		struct file *filp, pgoff_t index, unsigned long nr_to_read,
>  		unsigned long lookahead_size)


One more tiny thing: seeing as how this patch is also changing "size" to "count",
maybe it should also change lookahead_size to lookahead_count.


thanks,
-- 
John Hubbard
NVIDIA