mm/zswap: remove zswap_entry_cache_{create,destroy} helper function
Patch series "Delay the initialization of zswap", v9.
In the initialization of zswap, about 18MB memory will be allocated for
zswap_pool. Since some users may not use zswap, the zswap_pool is wasted.
Save memory by delaying the initialization of zswap until enabled.
This patch (of 3):
Remove zswap_entry_cache_create and zswap_entry_cache_destroy and use
kmem_cache_* function directly.
Link: https://lkml.kernel.org/r/20230411093632.822290-1-liushixin2@huawei.com
Link: https://lkml.kernel.org/r/20230403121318.1876082-1-liushixin2@huawei.com
Link: https://lkml.kernel.org/r/20230403121318.1876082-2-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
diff --git a/mm/zswap.c b/mm/zswap.c
index 2f0ebd8..6d2b879 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -272,17 +272,6 @@ static void zswap_update_total_size(void)
**********************************/
static struct kmem_cache *zswap_entry_cache;
-static int __init zswap_entry_cache_create(void)
-{
- zswap_entry_cache = KMEM_CACHE(zswap_entry, 0);
- return zswap_entry_cache == NULL;
-}
-
-static void __init zswap_entry_cache_destroy(void)
-{
- kmem_cache_destroy(zswap_entry_cache);
-}
-
static struct zswap_entry *zswap_entry_cache_alloc(gfp_t gfp)
{
struct zswap_entry *entry;
@@ -1489,7 +1478,8 @@ static int __init init_zswap(void)
zswap_init_started = true;
- if (zswap_entry_cache_create()) {
+ zswap_entry_cache = KMEM_CACHE(zswap_entry, 0);
+ if (!zswap_entry_cache) {
pr_err("entry cache creation failed\n");
goto cache_fail;
}
@@ -1538,7 +1528,7 @@ static int __init init_zswap(void)
hp_fail:
cpuhp_remove_state(CPUHP_MM_ZSWP_MEM_PREPARE);
dstmem_fail:
- zswap_entry_cache_destroy();
+ kmem_cache_destroy(zswap_entry_cache);
cache_fail:
/* if built-in, we aren't unloaded on failure; don't allow use */
zswap_init_failed = true;
