diff options
| author | Daniel Wagner <daniel.wagner@bmw-carit.de> | 2012-09-12 16:12:05 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-09-14 09:57:37 -0700 |
| commit | 5fc0b02544b3b9bd3db5a8156b5f3e7350f8e797 (patch) | |
| tree | 9382ec0de547289cbda8f4bdb90eb65a029398eb /include/linux/cgroup.h | |
| parent | be45c900fdc2c66baad5a7703fb8136991d88aeb (diff) | |
cgroup: Wrap subsystem selection macro
Before we are able to define all subsystem ids at compile time we need
a more fine grained control what gets defined when we include
cgroup_subsys.h. For example we define the enums for the subsystems or
to declare for struct cgroup_subsys (builtin subsystem) by including
cgroup_subsys.h and defining SUBSYS accordingly.
Currently, the decision if a subsys is used is defined inside the
header by testing if CONFIG_*=y is true. By moving this test outside
of cgroup_subsys.h we are able to control it on the include level.
This is done by introducing IS_SUBSYS_ENABLED which then is defined
according the task, e.g. is CONFIG_*=y or CONFIG_*=m.
Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Cc: Gao feng <gaofeng@cn.fujitsu.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: John Fastabend <john.r.fastabend@intel.com>
Cc: netdev@vger.kernel.org
Cc: cgroups@vger.kernel.org
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 1916cdb071dc..a5ab5651441b 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -46,10 +46,12 @@ extern const struct file_operations proc_cgroup_operations; /* Define the enumeration of all builtin cgroup subsystems */ #define SUBSYS(_x) _x ## _subsys_id, +#define IS_SUBSYS_ENABLED(option) IS_BUILTIN(option) enum cgroup_subsys_id { #include <linux/cgroup_subsys.h> __CGROUP_TEMPORARY_PLACEHOLDER }; +#undef IS_SUBSYS_ENABLED #undef SUBSYS /* * This define indicates the maximum number of subsystems that can be loaded @@ -528,7 +530,9 @@ struct cgroup_subsys { }; #define SUBSYS(_x) extern struct cgroup_subsys _x ## _subsys; +#define IS_SUBSYS_ENABLED(option) IS_BUILTIN(option) #include <linux/cgroup_subsys.h> +#undef IS_SUBSYS_ENABLED #undef SUBSYS static inline struct cgroup_subsys_state *cgroup_subsys_state( |