commit e55b9f96860f6c6026cff97966a740576285e07b
author Johannes Weiner <hannes@cmpxchg.org> Mon Sep 26 09:57:04 2022 -0400
committer Andrew Morton <akpm@linux-foundation.org> Mon Oct 03 14:03:36 2022 -0700
tree a0341415c2b45733d612961e2e356dad07954300
parent b94c4e949c36e0e363515822ade0d8305e9a6ef2

mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol

Since 2d1c498072de ("mm: memcontrol: make swap tracking an integral part
of memory control"), CONFIG_MEMCG_SWAP hasn't been a user-visible config
option anymore, it just means CONFIG_MEMCG && CONFIG_SWAP.

Update the sites accordingly and drop the symbol.

[ While touching the docs, remove two references to CONFIG_MEMCG_KMEM,
  which hasn't been a user-visible symbol for over half a decade. ]

Link: https://lkml.kernel.org/r/20220926135704.400818-5-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 76bb0a1..61e05fc 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3423,7 +3423,7 @@ void split_page_memcg(struct page *head, unsigned int nr)
 		css_get_many(&memcg->css, nr - 1);
 }
 
-#ifdef CONFIG_MEMCG_SWAP
+#ifdef CONFIG_SWAP
 /**
  * mem_cgroup_move_swap_account - move swap charge and swap_cgroup's record.
  * @entry: swap entry to be moved
@@ -7296,7 +7296,7 @@ static int __init mem_cgroup_init(void)
 }
 subsys_initcall(mem_cgroup_init);
 
-#ifdef CONFIG_MEMCG_SWAP
+#ifdef CONFIG_SWAP
 static struct mem_cgroup *mem_cgroup_id_get_online(struct mem_cgroup *memcg)
 {
 	while (!refcount_inc_not_zero(&memcg->id.ref)) {
@@ -7788,4 +7788,4 @@ static int __init mem_cgroup_swap_init(void)
 }
 subsys_initcall(mem_cgroup_swap_init);
 
-#endif /* CONFIG_MEMCG_SWAP */
+#endif /* CONFIG_SWAP */