mm/swap: Add folio_throttle_swaprate

The only use of the page argument to cgroup_throttle_swaprate() is to
get the node ID, and this will be the same for all pages in the folio,
so there's no need to convert the page to a folio before calling it.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

diff --git a/include/linux/swap.h b/include/linux/swap.h
index cdf0957a88a49a343307646f1ea0c5cbb90cdd33..a05e73927bbac0eb9cda65dc2bfced1b70a74ea1 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -740,6 +740,10 @@ static inline void cgroup_throttle_swaprate(struct page *page, gfp_t gfp_mask)
 {
 }
 #endif
+static inline void folio_throttle_swaprate(struct folio *folio, gfp_t gfp)
+{
+       cgroup_throttle_swaprate(&folio->page, gfp);
+}
 
 #ifdef CONFIG_MEMCG_SWAP
 extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);