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authorIngo Molnar <mingo@kernel.org>2017-02-01 18:42:41 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-08 09:01:11 +0100
commit1051408f7ecdcd1baf86f5dd5fdc44740be3b23d (patch)
tree0056c819eef9ed51ca78d27a92e0bed73323ef4d /kernel/sched/autogroup.h
parentf2cb13609d5397cdd747f3ed6fb651233851717d (diff)
downloadlinux-1051408f7ecdcd1baf86f5dd5fdc44740be3b23d.tar.bz2
sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]
The names are all 'autogroup', not 'auto_group' - so rename the kernel/sched/auto_group.[ch] to match the existing nomenclature. Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/autogroup.h')
-rw-r--r--kernel/sched/autogroup.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/kernel/sched/autogroup.h b/kernel/sched/autogroup.h
new file mode 100644
index 000000000000..890c95f2587a
--- /dev/null
+++ b/kernel/sched/autogroup.h
@@ -0,0 +1,64 @@
+#ifdef CONFIG_SCHED_AUTOGROUP
+
+#include <linux/kref.h>
+#include <linux/rwsem.h>
+
+struct autogroup {
+ /*
+ * reference doesn't mean how many thread attach to this
+ * autogroup now. It just stands for the number of task
+ * could use this autogroup.
+ */
+ struct kref kref;
+ struct task_group *tg;
+ struct rw_semaphore lock;
+ unsigned long id;
+ int nice;
+};
+
+extern void autogroup_init(struct task_struct *init_task);
+extern void autogroup_free(struct task_group *tg);
+
+static inline bool task_group_is_autogroup(struct task_group *tg)
+{
+ return !!tg->autogroup;
+}
+
+extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg);
+
+static inline struct task_group *
+autogroup_task_group(struct task_struct *p, struct task_group *tg)
+{
+ int enabled = READ_ONCE(sysctl_sched_autogroup_enabled);
+
+ if (enabled && task_wants_autogroup(p, tg))
+ return p->signal->autogroup->tg;
+
+ return tg;
+}
+
+extern int autogroup_path(struct task_group *tg, char *buf, int buflen);
+
+#else /* !CONFIG_SCHED_AUTOGROUP */
+
+static inline void autogroup_init(struct task_struct *init_task) { }
+static inline void autogroup_free(struct task_group *tg) { }
+static inline bool task_group_is_autogroup(struct task_group *tg)
+{
+ return 0;
+}
+
+static inline struct task_group *
+autogroup_task_group(struct task_struct *p, struct task_group *tg)
+{
+ return tg;
+}
+
+#ifdef CONFIG_SCHED_DEBUG
+static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
+{
+ return 0;
+}
+#endif
+
+#endif /* CONFIG_SCHED_AUTOGROUP */