/**
* add_to_swap - allocate swap space for a page
* @page: page we want to move to swap
+ * @gfp_mask: memory allocation flags
*
* Allocate swap space for the page and add the page to the
* swap cache. Caller needs to hold the page lock.
/**
* swapin_readahead - swap in pages in hope we need them soon
* @entry: swap entry of this memory
+ * @gfp_mask: memory allocation flags
* @vma: user vma this address belongs to
* @addr: target address for mempolicy
*