[PATCH RESEND net-next 2/2] net-memcg: Remove redundant tcpmem_pressure

[Abel Wu <wuyun.abel@bytedance.com>]

As {socket,tcpmem}_pressure are only used in default/legacy mode
respectively, use socket_pressure instead of tcpmem_pressure in all
kinds of cgroup hierarchies.

Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
---
 include/linux/memcontrol.h | 3 +--
 mm/memcontrol.c            | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 5860c7f316b9..341d397186ff 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -288,7 +288,6 @@ struct mem_cgroup {
 
 	/* Legacy tcp memory accounting */
 	bool			tcpmem_active;
-	int			tcpmem_pressure;
 
 #ifdef CONFIG_MEMCG_KMEM
 	int kmemcg_id;
@@ -1728,7 +1727,7 @@ void mem_cgroup_sk_free(struct sock *sk);
 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
 {
 	if (!cgroup_subsys_on_dfl(memory_cgrp_subsys))
-		return !!memcg->tcpmem_pressure;
+		return !!memcg->socket_pressure;
 	do {
 		if (time_before(jiffies, READ_ONCE(memcg->socket_pressure)))
 			return true;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e8ca4bdcb03c..e9e26dbd65b5 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -7292,10 +7292,10 @@ bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
 		struct page_counter *fail;
 
 		if (page_counter_try_charge(&memcg->tcpmem, nr_pages, &fail)) {
-			memcg->tcpmem_pressure = 0;
+			memcg->socket_pressure = 0;
 			return true;
 		}
-		memcg->tcpmem_pressure = 1;
+		memcg->socket_pressure = 1;
 		if (gfp_mask & __GFP_NOFAIL) {
 			page_counter_charge(&memcg->tcpmem, nr_pages);
 			return true;
-- 
2.37.3