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Date: Wed, 01 Feb 2012 14:56:03 +0800
From: Li Zefan <lizf@...fujitsu.com>
To: David Miller <davem@...emloft.net>
CC: netdev <netdev@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Cgroups <cgroups@...r.kernel.org>,
Neil Horman <nhorman@...driver.com>
Subject: [PATCH 4/6] netprio_cgroup: use IS_ENABLED() and family
- remove unused net_prio_subsys_id and sock->sk_cgrp->prioidx
when CGROUPS=y and NETPRIO_CGROUP=n
- don't use "ifndef CONFIG_NETPRIO_CGROUP" to suggest it's
a module, use IS_MODULE().
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
include/net/netprio_cgroup.h | 23 ++++++-----------------
include/net/sock.h | 2 +-
net/core/netprio_cgroup.c | 7 +++----
net/core/sock.c | 7 +++++--
4 files changed, 15 insertions(+), 24 deletions(-)
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
index d58fdec..8d09944 100644
--- a/include/net/netprio_cgroup.h
+++ b/include/net/netprio_cgroup.h
@@ -24,18 +24,16 @@ struct netprio_map {
u32 priomap[];
};
-#ifdef CONFIG_CGROUPS
-
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
struct cgroup_netprio_state {
struct cgroup_subsys_state css;
u32 prioidx;
};
-#ifndef CONFIG_NETPRIO_CGROUP
-extern int net_prio_subsys_id;
-#endif
-
extern void sock_update_netprioidx(struct sock *sk);
+#else
+static inline void sock_update_netprioidx(struct sock *sk) {}
+#endif
#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
@@ -54,6 +52,8 @@ static inline u32 task_netprioidx(struct task_struct *p)
#elif IS_MODULE(CONFIG_NETPRIO_CGROUP)
+extern int net_prio_subsys_id;
+
static inline u32 task_netprioidx(struct task_struct *p)
{
struct cgroup_netprio_state *state;
@@ -72,17 +72,6 @@ static inline u32 task_netprioidx(struct task_struct *p)
return idx;
}
-#else
-
-static inline u32 task_netprioidx(struct task_struct *p)
-{
- return 0;
-}
-
#endif /* CONFIG_NETPRIO_CGROUP */
-#else
-#define sock_update_netprioidx(sk)
-#endif
-
#endif /* _NET_CLS_CGROUP_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index 91c1c8b..b08a44e 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -342,7 +342,7 @@ struct sock {
unsigned short sk_ack_backlog;
unsigned short sk_max_ack_backlog;
__u32 sk_priority;
-#ifdef CONFIG_CGROUPS
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
__u32 sk_cgrp_prioidx;
#endif
struct pid *sk_peer_pid;
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 2edfa6b..95ab29a 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -33,7 +33,7 @@ struct cgroup_subsys net_prio_subsys = {
.create = cgrp_create,
.destroy = cgrp_destroy,
.populate = cgrp_populate,
-#ifdef CONFIG_NETPRIO_CGROUP
+#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
.subsys_id = net_prio_subsys_id,
#endif
.module = THIS_MODULE
@@ -298,7 +298,7 @@ static int __init init_cgroup_netprio(void)
ret = cgroup_load_subsys(&net_prio_subsys);
if (ret)
goto out;
-#ifndef CONFIG_NETPRIO_CGROUP
+#if IS_MODULE(CONFIG_NETPRIO_CGROUP)
smp_wmb();
net_prio_subsys_id = net_prio_subsys.subsys_id;
#endif
@@ -318,11 +318,10 @@ static void __exit exit_cgroup_netprio(void)
cgroup_unload_subsys(&net_prio_subsys);
-#ifndef CONFIG_NETPRIO_CGROUP
+#if IS_MODULE(CONFIG_NETPRIO_CGROUP)
net_prio_subsys_id = -1;
synchronize_rcu();
#endif
-
rtnl_lock();
for_each_netdev(&init_net, dev) {
old = rtnl_dereference(dev->priomap);
diff --git a/net/core/sock.c b/net/core/sock.c
index 02f8dfe..76df203 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -272,11 +272,12 @@ EXPORT_SYMBOL(sysctl_optmem_max);
int net_cls_subsys_id = -1;
EXPORT_SYMBOL_GPL(net_cls_subsys_id);
#endif
-#if !defined(CONFIG_NETPRIO_CGROUP)
+#endif
+
+#if IS_MODULE(CONFIG_NETPRIO_CGROUP)
int net_prio_subsys_id = -1;
EXPORT_SYMBOL_GPL(net_prio_subsys_id);
#endif
-#endif
static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
{
@@ -1168,7 +1169,9 @@ void sock_update_classid(struct sock *sk)
sk->sk_classid = classid;
}
EXPORT_SYMBOL(sock_update_classid);
+#endif
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
void sock_update_netprioidx(struct sock *sk)
{
if (in_interrupt())
--
1.7.3.1
--
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