1 files changed, 0 insertions, 129 deletions
diff --git a/target/linux/bcm27xx/patches-6.1/950-0238-zswap-Defer-zswap-initialisation.patch b/target/linux/bcm27xx/patches-6.1/950-0238-zswap-Defer-zswap-initialisation.patch
deleted file mode 100644
index b27bc25e15..0000000000
--- a/target/linux/bcm27xx/patches-6.1/950-0238-zswap-Defer-zswap-initialisation.patch
+++ /dev/null
@@ -1,129 +0,0 @@
-From cfe4cda49168a35df7a278e567542c2b7fa096c3 Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.com>
-Date: Tue, 5 May 2020 15:23:32 +0100
-Subject: [PATCH] zswap: Defer zswap initialisation
-
-Enabling zswap support in the kernel configuration costs about 1.5MB
-of RAM, even when zswap is not enabled at runtime. This cost can be
-reduced significantly by deferring initialisation (including pool
-creation) until the "enabled" parameter is set to true. There is a
-small cost to this in that some initialisation code has to remain in
-memory after the init phase, just in case they are needed later,
-but the total size increase is negligible.
-
-See: https://github.com/raspberrypi/linux/pull/3432
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.com>
----
- mm/zswap.c | 53 +++++++++++++++++++++++++++++------------------------
- 1 file changed, 29 insertions(+), 24 deletions(-)
-
---- a/mm/zswap.c
-+++ b/mm/zswap.c
-@@ -663,8 +663,9 @@ error:
- 	return NULL;
- }
- 
--static __init struct zswap_pool *__zswap_pool_create_fallback(void)
-+static bool zswap_try_pool_create(void)
- {
-+	struct zswap_pool *pool;
- 	bool has_comp, has_zpool;
- 
- 	has_comp = crypto_has_acomp(zswap_compressor, 0, 0);
-@@ -700,9 +701,21 @@ static __init struct zswap_pool *__zswap
- 	}
- 
- 	if (!has_comp || !has_zpool)
--		return NULL;
-+		return false;
-+
-+	pool = zswap_pool_create(zswap_zpool_type, zswap_compressor);
- 
--	return zswap_pool_create(zswap_zpool_type, zswap_compressor);
-+	if (pool) {
-+		pr_info("loaded using pool %s/%s\n", pool->tfm_name,
-+			zpool_get_type(pool->zpool));
-+		list_add(&pool->list, &zswap_pools);
-+		zswap_has_pool = true;
-+	} else {
-+		pr_err("pool creation failed\n");
-+		zswap_enabled = false;
-+	}
-+
-+	return zswap_enabled;
- }
- 
- static void zswap_pool_destroy(struct zswap_pool *pool)
-@@ -875,16 +888,19 @@ static int zswap_zpool_param_set(const c
- static int zswap_enabled_param_set(const char *val,
- 				   const struct kernel_param *kp)
- {
-+	int ret;
-+
- 	if (zswap_init_failed) {
- 		pr_err("can't enable, initialization failed\n");
- 		return -ENODEV;
- 	}
--	if (!zswap_has_pool && zswap_init_started) {
--		pr_err("can't enable, no pool configured\n");
--		return -ENODEV;
--	}
- 
--	return param_set_bool(val, kp);
-+	ret = param_set_bool(val, kp);
-+	if (!ret && zswap_enabled && zswap_init_started && !zswap_has_pool)
-+		if (!zswap_try_pool_create())
-+			ret = -ENODEV;
-+
-+	return ret;
- }
- 
- /*********************************
-@@ -1498,7 +1514,6 @@ static int __init zswap_debugfs_init(voi
- **********************************/
- static int __init init_zswap(void)
- {
--	struct zswap_pool *pool;
- 	int ret;
- 
- 	zswap_init_started = true;
-@@ -1522,33 +1537,23 @@ static int __init init_zswap(void)
- 	if (ret)
- 		goto hp_fail;
- 
--	pool = __zswap_pool_create_fallback();
--	if (pool) {
--		pr_info("loaded using pool %s/%s\n", pool->tfm_name,
--			zpool_get_type(pool->zpool));
--		list_add(&pool->list, &zswap_pools);
--		zswap_has_pool = true;
--	} else {
--		pr_err("pool creation failed\n");
--		zswap_enabled = false;
--	}
--
- 	shrink_wq = create_workqueue("zswap-shrink");
- 	if (!shrink_wq)
--		goto fallback_fail;
-+		goto hp_fail;
- 
- 	ret = frontswap_register_ops(&zswap_frontswap_ops);
- 	if (ret)
- 		goto destroy_wq;
- 	if (zswap_debugfs_init())
- 		pr_warn("debugfs initialization failed\n");
-+
-+	if (zswap_enabled)
-+		zswap_try_pool_create();
-+
- 	return 0;
- 
- destroy_wq:
- 	destroy_workqueue(shrink_wq);
--fallback_fail:
--	if (pool)
--		zswap_pool_destroy(pool);
- hp_fail:
- 	cpuhp_remove_state(CPUHP_MM_ZSWP_MEM_PREPARE);
- dstmem_fail: