On Fri, 2013-06-07 at 13:43 -0700, Andrew Morton wrote:
> On Sat, 8 Jun 2013 00:23:18 +0400 Artem Savkov <artem.sav...@gmail.com>
> wrote:
[]
> +++ a/mm/page_io.c
[]
> + /*
> + * There is no guarantee that the page is in swap cache - the software
> + * suspend code (at least) uses end_swap_bio_read() against a non-
> + * swapcache page. So we must check PG_swapcache before proceeding with
> + * this optimization.
> + */
> + if (likely(PageSwapCache(page))) {
or
if (unlikely(!PageSwapCache(page)))
goto out;
to save an indent level
> +out:
> unlock_page(page);
> bio_put(bio);
> }
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