[PATCH v7 2/8] mm: zswap: Modify zswap_compress() to accept a page instead of a folio.

From: Kanchana P Sridhar
Date: Mon Sep 23 2024 - 21:17:22 EST


For zswap_store() to be able to store an mTHP 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 mTHP in zswap_store(), compress it and store it in the zpool.

Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
---
mm/zswap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/zswap.c b/mm/zswap.c
index 449914ea9919..59b7733a62d3 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -876,7 +876,7 @@ 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;
@@ -894,7 +894,7 @@ 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,
@@ -1458,7 +1458,7 @@ 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