Re: [PATCH 2/2] mm: Real pagecache iterators

[Andrew Morton]

On Thu, 31 Mar 2016 18:38:11 -0800 Kent Overstreet <kent.overstreet@xxxxxxxxx> wrote:

> Introduce for_each_pagecache_page() and related macros, with the goal of
> replacing most/all uses of pagevec_lookup().
> 
> For the most part this shouldn't be a functional change. The one functional
> difference with the new macros is that they now take an @end parameter, so we're
> able to avoid grabbing pages in __find_get_pages() that we'll never use.
> 
> This patch only does some of the conversions, the ones I was able to easily test
> myself - the conversions are mechanical but tricky enough they generally warrent
> testing.

What is the reason for this change?