[Devel] [PATCH] net: fix silly mistake with TCP cgroup memory pressure check

[Stanislav Kinsburskiy]

Memmory pressure is referenced as a pointer in socket structure.
Simple check for pointer address will always return true for each socket,
allocated with enabled mem_cg.
Memory pressure value has to checked instead.

https://jira.sw.ru/browse/PSBM-66468

Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
---
 include/net/tcp.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index d64d30b..f2b4843 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -298,7 +298,7 @@ extern int tcp_memory_pressure;
 static inline bool tcp_under_memory_pressure(const struct sock *sk)
 {
 	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-		return !!sk->sk_cgrp->memory_pressure;
+		return *sk->sk_cgrp->memory_pressure;
 
 	return tcp_memory_pressure;
 }