[PATCH 32/89] sched/numa: Split <linux/sched/numa_balancing.h> out of <linux/sched.h>

[Ingo Molnar <mingo@kernel.org>]

Split out the interface between the scheduler and the MM which
deals with page fault driven NUMA balancing, into the new
<linux/sched/numa_balancing.h> header.

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>
---
 fs/exec.c                            |  1 +
 fs/proc/array.c                      |  1 +
 include/linux/sched.h                | 35 -----------------------------------
 include/linux/sched/numa_balancing.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 include/trace/events/sched.h         |  2 +-
 kernel/fork.c                        |  1 +
 kernel/sched/sched.h                 |  1 +
 mm/huge_memory.c                     |  1 +
 mm/memory.c                          |  1 +
 mm/mempolicy.c                       |  1 +
 10 files changed, 54 insertions(+), 36 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 2a24d7d435ba..e3d16ee36223 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -35,6 +35,7 @@
 #include <linux/sched/mm.h>
 #include <linux/sched/coredump.h>
 #include <linux/sched/signal.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/pagemap.h>
 #include <linux/perf_event.h>
 #include <linux/highmem.h>
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 61bea3a4ecc5..cfe7f934a300 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -61,6 +61,7 @@
 #include <linux/string.h>
 #include <linux/mman.h>
 #include <linux/sched/mm.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/proc_fs.h>
 #include <linux/ioport.h>
 #include <linux/uaccess.h>
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f7aea422b9cf..e63448cae4e4 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1239,41 +1239,6 @@ static inline int tsk_nr_cpus_allowed(struct task_struct *p)
 	return p->nr_cpus_allowed;
 }
 
-#define TNF_MIGRATED	0x01
-#define TNF_NO_GROUP	0x02
-#define TNF_SHARED	0x04
-#define TNF_FAULT_LOCAL	0x08
-#define TNF_MIGRATE_FAIL 0x10
-
-#ifdef CONFIG_NUMA_BALANCING
-extern void task_numa_fault(int last_node, int node, int pages, int flags);
-extern pid_t task_numa_group_id(struct task_struct *p);
-extern void set_numabalancing_state(bool enabled);
-extern void task_numa_free(struct task_struct *p);
-extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
-					int src_nid, int dst_cpu);
-#else
-static inline void task_numa_fault(int last_node, int node, int pages,
-				   int flags)
-{
-}
-static inline pid_t task_numa_group_id(struct task_struct *p)
-{
-	return 0;
-}
-static inline void set_numabalancing_state(bool enabled)
-{
-}
-static inline void task_numa_free(struct task_struct *p)
-{
-}
-static inline bool should_numa_migrate_memory(struct task_struct *p,
-				struct page *page, int src_nid, int dst_cpu)
-{
-	return true;
-}
-#endif
-
 static inline struct pid *task_pid(struct task_struct *task)
 {
 	return task->pids[PIDTYPE_PID].pid;
diff --git a/include/linux/sched/numa_balancing.h b/include/linux/sched/numa_balancing.h
new file mode 100644
index 000000000000..35d5fc77b4be
--- /dev/null
+++ b/include/linux/sched/numa_balancing.h
@@ -0,0 +1,46 @@
+#ifndef _LINUX_SCHED_NUMA_BALANCING_H
+#define _LINUX_SCHED_NUMA_BALANCING_H
+
+/*
+ * This is the interface between the scheduler and the MM that
+ * implements memory access pattern based NUMA-balancing:
+ */
+
+#include <linux/sched.h>
+
+#define TNF_MIGRATED	0x01
+#define TNF_NO_GROUP	0x02
+#define TNF_SHARED	0x04
+#define TNF_FAULT_LOCAL	0x08
+#define TNF_MIGRATE_FAIL 0x10
+
+#ifdef CONFIG_NUMA_BALANCING
+extern void task_numa_fault(int last_node, int node, int pages, int flags);
+extern pid_t task_numa_group_id(struct task_struct *p);
+extern void set_numabalancing_state(bool enabled);
+extern void task_numa_free(struct task_struct *p);
+extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
+					int src_nid, int dst_cpu);
+#else
+static inline void task_numa_fault(int last_node, int node, int pages,
+				   int flags)
+{
+}
+static inline pid_t task_numa_group_id(struct task_struct *p)
+{
+	return 0;
+}
+static inline void set_numabalancing_state(bool enabled)
+{
+}
+static inline void task_numa_free(struct task_struct *p)
+{
+}
+static inline bool should_numa_migrate_memory(struct task_struct *p,
+				struct page *page, int src_nid, int dst_cpu)
+{
+	return true;
+}
+#endif
+
+#endif /* _LINUX_SCHED_NUMA_BALANCING_H */
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 9b90c57517a9..9e3ef6c99e4b 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -4,7 +4,7 @@
 #if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_SCHED_H
 
-#include <linux/sched.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/tracepoint.h>
 #include <linux/binfmts.h>
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 9c577368b30d..f060b1c6a947 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -16,6 +16,7 @@
 #include <linux/sched/mm.h>
 #include <linux/sched/coredump.h>
 #include <linux/sched/user.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/init.h>
 #include <linux/unistd.h>
 #include <linux/module.h>
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 7dfeb14fa43c..7e8ce0347fbf 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -6,6 +6,7 @@
 #include <linux/sched/clock.h>
 #include <linux/sched/wake_q.h>
 #include <linux/sched/signal.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/sched/mm.h>
 #include <linux/sched/cpufreq.h>
 #include <linux/u64_stats_sync.h>
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 02c0287586e5..d600d3bf44fb 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -10,6 +10,7 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/sched/coredump.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/highmem.h>
 #include <linux/hugetlb.h>
 #include <linux/mmu_notifier.h>
diff --git a/mm/memory.c b/mm/memory.c
index 9967bd79c8a8..ac1f5b93e268 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -42,6 +42,7 @@
 #include <linux/mm.h>
 #include <linux/sched/mm.h>
 #include <linux/sched/coredump.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/hugetlb.h>
 #include <linux/mman.h>
 #include <linux/swap.h>
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 90892416ed75..18e0105810df 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -74,6 +74,7 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/sched/mm.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/nodemask.h>
 #include <linux/cpuset.h>
 #include <linux/slab.h>
-- 
2.7.4