cgroups: fix declaration of cgroup_mm_owner_callbacks
The choice of real/dummy declaration for cgroup_mm_owner_callbacks()
shouldn't be based on CONFIG_MM_OWNER, but on CONFIG_CGROUPS. Otherwise
kernel/exit.c fails to compile when something other than a cgroups
controller selects CONFIG_MM_OWNER
Signed-off-by: Paul Menage <menage@google.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 8ab9188..8b00f66 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -403,6 +403,9 @@
int cgroup_scan_tasks(struct cgroup_scanner *scan);
int cgroup_attach_task(struct cgroup *, struct task_struct *);
+void cgroup_mm_owner_callbacks(struct task_struct *old,
+ struct task_struct *new);
+
#else /* !CONFIG_CGROUPS */
static inline int cgroup_init_early(void) { return 0; }
@@ -421,15 +424,9 @@
return -EINVAL;
}
+static inline void cgroup_mm_owner_callbacks(struct task_struct *old,
+ struct task_struct *new) {}
+
#endif /* !CONFIG_CGROUPS */
-#ifdef CONFIG_MM_OWNER
-extern void
-cgroup_mm_owner_callbacks(struct task_struct *old, struct task_struct *new);
-#else /* !CONFIG_MM_OWNER */
-static inline void
-cgroup_mm_owner_callbacks(struct task_struct *old, struct task_struct *new)
-{
-}
-#endif /* CONFIG_MM_OWNER */
#endif /* _LINUX_CGROUP_H */