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Date: Wed, 01 Feb 2012 14:56:28 +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 5/6] cls_cgroup: use IS_ENABLED() and family
- remove net_cls_subsys_id when CGROUPS=y && !NET_CLS_CGRUOP
- remove sock->classid when !NET_CLS_CGROUP
- don't use "ifndef CONFIG_NET_CLS_CGROUP" to sugguest it's
a module, use IS_MODULE().
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
include/net/cls_cgroup.h | 12 ++++--------
include/net/sock.h | 4 +++-
net/core/sock.c | 6 ++----
net/sched/cls_cgroup.c | 6 +++---
4 files changed, 12 insertions(+), 16 deletions(-)
diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
index a4dc5b0..806b9a1 100644
--- a/include/net/cls_cgroup.h
+++ b/include/net/cls_cgroup.h
@@ -17,14 +17,14 @@
#include <linux/hardirq.h>
#include <linux/rcupdate.h>
-#ifdef CONFIG_CGROUPS
+#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
struct cgroup_cls_state
{
struct cgroup_subsys_state css;
u32 classid;
};
-#ifdef CONFIG_NET_CLS_CGROUP
+#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
static inline u32 task_cls_classid(struct task_struct *p)
{
int classid;
@@ -39,7 +39,7 @@ static inline u32 task_cls_classid(struct task_struct *p)
return classid;
}
-#else
+#elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
extern int net_cls_subsys_id;
static inline u32 task_cls_classid(struct task_struct *p)
@@ -61,10 +61,6 @@ static inline u32 task_cls_classid(struct task_struct *p)
return classid;
}
#endif
-#else
-static inline u32 task_cls_classid(struct task_struct *p)
-{
- return 0;
-}
+
#endif
#endif /* _NET_CLS_CGROUP_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index b08a44e..7b80d55 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -362,7 +362,9 @@ struct sock {
void *sk_security;
#endif
__u32 sk_mark;
+#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
u32 sk_classid;
+#endif
struct cg_proto *sk_cgrp;
void (*sk_state_change)(struct sock *sk);
void (*sk_data_ready)(struct sock *sk, int bytes);
@@ -1382,7 +1384,7 @@ extern void *sock_kmalloc(struct sock *sk, int size,
extern void sock_kfree_s(struct sock *sk, void *mem, int size);
extern void sk_send_sigurg(struct sock *sk);
-#ifdef CONFIG_CGROUPS
+#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
extern void sock_update_classid(struct sock *sk);
#else
static inline void sock_update_classid(struct sock *sk)
diff --git a/net/core/sock.c b/net/core/sock.c
index 76df203..213c856 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -267,12 +267,10 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
EXPORT_SYMBOL(sysctl_optmem_max);
-#if defined(CONFIG_CGROUPS)
-#if !defined(CONFIG_NET_CLS_CGROUP)
+#if IS_MODULE(CONFIG_NET_CLS_CGROUP)
int net_cls_subsys_id = -1;
EXPORT_SYMBOL_GPL(net_cls_subsys_id);
#endif
-#endif
#if IS_MODULE(CONFIG_NETPRIO_CGROUP)
int net_prio_subsys_id = -1;
@@ -1157,7 +1155,7 @@ static void sk_prot_free(struct proto *prot, struct sock *sk)
module_put(owner);
}
-#ifdef CONFIG_CGROUPS
+#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
void sock_update_classid(struct sock *sk)
{
u32 classid;
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index f84fdc3..f57245c 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -32,7 +32,7 @@ struct cgroup_subsys net_cls_subsys = {
.create = cgrp_create,
.destroy = cgrp_destroy,
.populate = cgrp_populate,
-#ifdef CONFIG_NET_CLS_CGROUP
+#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
.subsys_id = net_cls_subsys_id,
#endif
.module = THIS_MODULE,
@@ -294,7 +294,7 @@ static int __init init_cgroup_cls(void)
if (ret)
goto out;
-#ifndef CONFIG_NET_CLS_CGROUP
+#if IS_MODULE(CONFIG_NET_CLS_CGROUP)
/* We can't use rcu_assign_pointer because this is an int. */
smp_wmb();
net_cls_subsys_id = net_cls_subsys.subsys_id;
@@ -312,7 +312,7 @@ static void __exit exit_cgroup_cls(void)
{
unregister_tcf_proto_ops(&cls_cgroup_ops);
-#ifndef CONFIG_NET_CLS_CGROUP
+#if IS_MODULE(CONFIG_NET_CLS_CGROUP)
net_cls_subsys_id = -1;
synchronize_rcu();
#endif
--
1.7.3.1
--
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