On Mon, 16 Nov 2015, Yaowei Bai wrote:
> diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
> index cf55945..af73135 100644
> --- a/include/linux/mm_inline.h
> +++ b/include/linux/mm_inline.h
> @@ -8,8 +8,8 @@
> * page_is_file_cache - should the page be on a file LRU or anon LRU?
> * @page: the page to test
> *
> - * Returns 1 if @page is page cache page backed by a regular filesystem,
> - * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed.
> + * Returns true if @page is page cache page backed by a regular filesystem,
> + * or false if @page is anonymous, tmpfs or otherwise ram or swap backed.
> * Used by functions that manipulate the LRU lists, to sort a page
> * onto the right LRU list.
> *
> @@ -17,7 +17,7 @@
> * needs to survive until the page is last deleted from the LRU, which
> * could be as far down as __page_cache_release.
> */
> -static inline int page_is_file_cache(struct page *page)
> +static inline bool page_is_file_cache(struct page *page)
> {
> return !PageSwapBacked(page);
> }
Since page_is_file_cache() is often used to determine which zlc to
increment or decrement (usage such as
NR_ISOLATED_ANON + page_is_file_cache(page)), I don't think this style is
helpful.
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