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Date: Tue, 14 Aug 2012 15:02:22 +0200
From: Daniel Wagner <wagi@...om.org>
To: netdev@...r.kernel.org, cgroups@...r.kernel.org
Cc: Daniel Wagner <daniel.wagner@...-carit.de>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Glauber Costa <glommer@...allels.com>,
Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
Li Zefan <lizefan@...wei.com>,
Neil Horman <nhorman@...driver.com>, Tejun Heo <tj@...nel.org>
Subject: [PATCH v3 5/6] cgroup: Use IS_MODULE/BUITLIN for net_prio
From: Daniel Wagner <daniel.wagner@...-carit.de>
Instead of using #ifdef variation for building the net_prio
in the different configuration use explicit IS_MODULE and
IS_BUILTIN macros.
This allows to reorder in readable way the netprio_cgroup.h header file
so that the common definition of the struct is first followed
by the two different version for task_netprioidx().
Signed-off-by: Daniel Wagner <daniel.wagner@...-carit.de>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Glauber Costa <glommer@...allels.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: Li Zefan <lizefan@...wei.com>
Cc: Neil Horman <nhorman@...driver.com>
Cc: Tejun Heo <tj@...nel.org>
Cc: netdev@...r.kernel.org
Cc: cgroups@...r.kernel.org
---
include/net/netprio_cgroup.h | 33 ++++++++++++++++-----------------
net/core/netprio_cgroup.c | 6 +++---
net/core/sock.c | 4 +++-
3 files changed, 22 insertions(+), 21 deletions(-)
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
index 2719dec..c43461e 100644
--- a/include/net/netprio_cgroup.h
+++ b/include/net/netprio_cgroup.h
@@ -17,6 +17,7 @@
#include <linux/hardirq.h>
#include <linux/rcupdate.h>
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
struct netprio_map {
struct rcu_head rcu;
@@ -24,19 +25,26 @@ struct netprio_map {
u32 priomap[];
};
-#ifdef CONFIG_CGROUPS
-
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, struct task_struct *task);
+#else
+
+static inline void sock_update_netprioidx(struct sock *sk, struct task_struct *task)
+{
+}
+
+static inline u32 task_netprioidx(struct task_struct *p)
+{
+ return 0;
+}
+
+#endif
+
#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
static inline u32 task_netprioidx(struct task_struct *p)
@@ -54,6 +62,8 @@ 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 +82,6 @@ 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, task)
-#endif
-
#endif /* _NET_CLS_CGROUP_H */
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 98478aa..238ece6 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -342,7 +342,7 @@ struct cgroup_subsys net_prio_subsys = {
.create = cgrp_create,
.destroy = cgrp_destroy,
.attach = net_prio_attach,
-#ifdef CONFIG_NETPRIO_CGROUP
+#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
.subsys_id = net_prio_subsys_id,
#endif
.base_cftypes = ss_files,
@@ -382,7 +382,7 @@ 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
@@ -402,7 +402,7 @@ 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
diff --git a/net/core/sock.c b/net/core/sock.c
index d2d920e..bdd06af 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -331,7 +331,7 @@ EXPORT_SYMBOL(__sk_backlog_rcv);
int net_cls_subsys_id = -1;
EXPORT_SYMBOL_GPL(net_cls_subsys_id);
#endif
-#if !defined(CONFIG_NETPRIO_CGROUP)
+#if IS_MODULE(CONFIG_NETPRIO_CGROUP)
int net_prio_subsys_id = -1;
EXPORT_SYMBOL_GPL(net_prio_subsys_id);
#endif
@@ -1238,6 +1238,7 @@ void sock_update_classid(struct sock *sk, struct task_struct *task)
EXPORT_SYMBOL(sock_update_classid);
#endif
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
void sock_update_netprioidx(struct sock *sk, struct task_struct *task)
{
if (in_interrupt())
@@ -1247,6 +1248,7 @@ void sock_update_netprioidx(struct sock *sk, struct task_struct *task)
}
EXPORT_SYMBOL_GPL(sock_update_netprioidx);
#endif
+#endif
/**
* sk_alloc - All socket objects are allocated here
--
1.7.12.rc1.16.g05a20c8
--
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