[PATCH v10 2/7] mm: zswap: Modify zswap_compress() to accept a page instead of a folio.

[Kanchana P Sridhar]

For zswap_store() to be able to store a large folio by compressing it
one page at a time, zswap_compress() needs to accept a page as input.
This will allow us to iterate through each page in the folio in
zswap_store(), compress it and store it in the zpool.

Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
Reviewed-by: Nhat Pham <nphamcs@xxxxxxxxx>
Reviewed-by: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
---
 mm/zswap.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/zswap.c b/mm/zswap.c
index efad4e941e44..fd7a8c14457a 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -875,7 +875,7 @@ static int zswap_cpu_comp_dead(unsigned int cpu, struct hlist_node *node)
 	return 0;
 }
 
-static bool zswap_compress(struct folio *folio, struct zswap_entry *entry)
+static bool zswap_compress(struct page *page, struct zswap_entry *entry)
 {
 	struct crypto_acomp_ctx *acomp_ctx;
 	struct scatterlist input, output;
@@ -893,7 +893,7 @@ static bool zswap_compress(struct folio *folio, struct zswap_entry *entry)
 
 	dst = acomp_ctx->buffer;
 	sg_init_table(&input, 1);
-	sg_set_folio(&input, folio, PAGE_SIZE, 0);
+	sg_set_page(&input, page, PAGE_SIZE, 0);
 
 	/*
 	 * We need PAGE_SIZE * 2 here since there maybe over-compression case,
@@ -1456,7 +1456,7 @@ bool zswap_store(struct folio *folio)
 		mem_cgroup_put(memcg);
 	}
 
-	if (!zswap_compress(folio, entry))
+	if (!zswap_compress(&folio->page, entry))
 		goto put_pool;
 
 	entry->swpentry = swp;
-- 
2.27.0