zswap: make zswap_store() take a folio

Patch series "Followup folio conversions for zswap".

With frontswap killed, it's worth converting the zswap_load() and
zswap_store() functions to take a folio instead of a page pointer.  They
aren't converted to support large folios, but there are a lot of
unnecessary calls to compound_head() that are removed by these patches.


This patch (of 4):

Only convert a few easy parts of this function to use the folio passed in;
convert back to struct page for the majority of it.  This does remove a
few hidden calls to compound_head().

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Domenico Cerasuolo <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Nhat Pham <[email protected]>
Cc: Vitaly Wool <[email protected]>
Cc: Yosry Ahmed <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/zswap.h b/include/linux/zswap.h
index 850c377d9b6d..9f318c8bc367 100644
--- a/include/linux/zswap.h
+++ b/include/linux/zswap.h
@@ -10,7 +10,7 @@ extern atomic_t zswap_stored_pages;
 
 #ifdef CONFIG_ZSWAP
 
-bool zswap_store(struct page *page);
+bool zswap_store(struct folio *folio);
 bool zswap_load(struct page *page);
 void zswap_invalidate(int type, pgoff_t offset);
 void zswap_swapon(int type);
@@ -18,7 +18,7 @@ void zswap_swapoff(int type);
 
 #else
 
-static inline bool zswap_store(struct page *page)
+static inline bool zswap_store(struct folio *folio)
 {
 	return false;
 }