Re: [PATCH v2 net] tcp: md5: do not use alloc_percpu()

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 1bec4e76d88c..39ec0c379545 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c

@@ -2868,61 +2868,42 @@ EXPORT_SYMBOL(compat_tcp_getsockopt);
  #endif

  #ifdef CONFIG_TCP_MD5SIG
-static struct tcp_md5sig_pool __percpu *tcp_md5sig_pool __read_mostly;
+static DEFINE_PER_CPU(struct tcp_md5sig_pool, tcp_md5sig_pool);
  static DEFINE_MUTEX(tcp_md5sig_mutex);
-
-static void __tcp_free_md5sig_pool(struct tcp_md5sig_pool __percpu *pool)
-{
-	int cpu;
-
-	for_each_possible_cpu(cpu) {
-		struct tcp_md5sig_pool *p = per_cpu_ptr(pool, cpu);
-
-		if (p->md5_desc.tfm)
-			crypto_free_hash(p->md5_desc.tfm);
-	}
-	free_percpu(pool);
-}
+static bool tcp_md5sig_pool_populated = false;