On Tue, Aug 04, 2020 at 05:17:52PM +0100, Matthew Wilcox (Oracle) wrote:
> diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
> index 484a36185bb5..a474a92a2a72 100644
> --- a/include/linux/pagemap.h
> +++ b/include/linux/pagemap.h
> @@ -18,6 +18,11 @@
>
> struct pagevec;
>
> +static inline bool page_cache_empty(struct address_space *mapping)
> +{
> + return xa_empty(&mapping->i_pages);
What about something like
bool empty = xa_empty(&mapping->i_pages);
VM_BUG_ON(empty && mapping->nrpages);
return empty;
?
> +}
> +
> /*
> * Bits in mapping->flags.
> */
--
Kirill A. Shutemov
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