Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull sched.h split-up from Ingo Molnar:
 "The point of these changes is to significantly reduce the
  <linux/sched.h> header footprint, to speed up the kernel build and to
  have a cleaner header structure.

  After these changes the new <linux/sched.h>'s typical preprocessed
  size goes down from a previous ~0.68 MB (~22K lines) to ~0.45 MB (~15K
  lines), which is around 40% faster to build on typical configs.

  Not much changed from the last version (-v2) posted three weeks ago: I
  eliminated quirks, backmerged fixes plus I rebased it to an upstream
  SHA1 from yesterday that includes most changes queued up in -next plus
  all sched.h changes that were pending from Andrew.

  I've re-tested the series both on x86 and on cross-arch defconfigs,
  and did a bisectability test at a number of random points.

  I tried to test as many build configurations as possible, but some
  build breakage is probably still left - but it should be mostly
  limited to architectures that have no cross-compiler binaries
  available on kernel.org, and non-default configurations"

* 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (146 commits)
  sched/headers: Clean up <linux/sched.h>
  sched/headers: Remove #ifdefs from <linux/sched.h>
  sched/headers: Remove the <linux/topology.h> include from <linux/sched.h>
  sched/headers, hrtimer: Remove the <linux/wait.h> include from <linux/hrtimer.h>
  sched/headers, x86/apic: Remove the <linux/pm.h> header inclusion from <asm/apic.h>
  sched/headers, timers: Remove the <linux/sysctl.h> include from <linux/timer.h>
  sched/headers: Remove <linux/magic.h> from <linux/sched/task_stack.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/init.h>
  sched/core: Remove unused prefetch_stack()
  sched/headers: Remove <linux/rculist.h> from <linux/sched.h>
  sched/headers: Remove the 'init_pid_ns' prototype from <linux/sched.h>
  sched/headers: Remove <linux/signal.h> from <linux/sched.h>
  sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>
  sched/headers: Remove the runqueue_is_locked() prototype
  sched/headers: Remove <linux/sched.h> from <linux/sched/hotplug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/debug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/nohz.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/stat.h>
  sched/headers: Remove the <linux/gfp.h> include from <linux/sched.h>
  sched/headers: Remove <linux/rtmutex.h> from <linux/sched.h>
  ...

79 files changed, 3375 insertions, 3012 deletions

diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index d81b0ba9921f..2ef16bf25826 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -40,6 +40,7 @@
 #include <linux/bug.h>
 #include <linux/rbtree.h>
 #include <linux/kernel.h>
+#include <linux/mm_types.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #ifdef CONFIG_DRM_DEBUG_MM
diff --git a/include/drm/drm_os_linux.h b/include/drm/drm_os_linux.h
index 86ab99bc0ac5..35e1482ba8a1 100644
--- a/include/drm/drm_os_linux.h
+++ b/include/drm/drm_os_linux.h
@@ -4,6 +4,7 @@
  */
 
 #include <linux/interrupt.h>	/* For task queue support */
+#include <linux/sched/signal.h>
 #include <linux/delay.h>
 
 #ifndef readq
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 1303b570b18c..05488da3aee9 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -6,6 +6,8 @@
 #include <asm/exec.h>
 #include <uapi/linux/binfmts.h>
 
+struct filename;
+
 #define CORENAME_MAX_SIZE 128
 
 /*
@@ -123,4 +125,12 @@ extern void install_exec_creds(struct linux_binprm *bprm);
 extern void set_binfmt(struct linux_binfmt *new);
 extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
 
+extern int do_execve(struct filename *,
+		     const char __user * const __user *,
+		     const char __user * const __user *);
+extern int do_execveat(int, struct filename *,
+		       const char __user * const __user *,
+		       const char __user * const __user *,
+		       int);
+
 #endif /* _LINUX_BINFMTS_H */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index aecca0e7d9ca..796016e63c1d 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -2,6 +2,7 @@
 #define _LINUX_BLKDEV_H
 
 #include <linux/sched.h>
+#include <linux/sched/clock.h>
 
 #ifdef CONFIG_BLOCK
 
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 3c02404cfce9..6a3f850cabab 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -531,8 +531,8 @@ extern struct percpu_rw_semaphore cgroup_threadgroup_rwsem;
  * cgroup_threadgroup_change_begin - threadgroup exclusion for cgroups
  * @tsk: target task
  *
- * Called from threadgroup_change_begin() and allows cgroup operations to
- * synchronize against threadgroup changes using a percpu_rw_semaphore.
+ * Allows cgroup operations to synchronize against threadgroup changes
+ * using a percpu_rw_semaphore.
  */
 static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
 {
@@ -543,8 +543,7 @@ static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
  * cgroup_threadgroup_change_end - threadgroup exclusion for cgroups
  * @tsk: target task
  *
- * Called from threadgroup_change_end().  Counterpart of
- * cgroup_threadcgroup_change_begin().
+ * Counterpart of cgroup_threadcgroup_change_begin().
  */
 static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
 {
@@ -555,7 +554,11 @@ static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
 
 #define CGROUP_SUBSYS_COUNT 0
 
-static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk) {}
+static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
+{
+	might_sleep();
+}
+
 static inline void cgroup_threadgroup_change_end(struct task_struct *tsk) {}
 
 #endif	/* CONFIG_CGROUPS */
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 21f9c74496e7..f92081234afd 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -30,6 +30,8 @@ struct cpu {
 
 extern void boot_cpu_init(void);
 extern void boot_cpu_state_init(void);
+extern void cpu_init(void);
+extern void trap_init(void);
 
 extern int register_cpu(struct cpu *cpu, int num);
 extern struct device *get_cpu_device(unsigned cpu);
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index bfc204e70338..611fce58d670 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -9,6 +9,8 @@
  */
 
 #include <linux/sched.h>
+#include <linux/sched/topology.h>
+#include <linux/sched/task.h>
 #include <linux/cpumask.h>
 #include <linux/nodemask.h>
 #include <linux/mm.h>
diff --git a/include/linux/cputime.h b/include/linux/cputime.h
deleted file mode 100644
index a691dc4ddc13..000000000000
--- a/include/linux/cputime.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef __LINUX_CPUTIME_H
-#define __LINUX_CPUTIME_H
-
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
-#include <asm/cputime.h>
-
-#ifndef cputime_to_nsecs
-# define cputime_to_nsecs(__ct)	\
-	(cputime_to_usecs(__ct) * NSEC_PER_USEC)
-#endif
-
-#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
-#endif /* __LINUX_CPUTIME_H */
diff --git a/include/linux/cred.h b/include/linux/cred.h
index f0e70a1bb3ac..b03e7d049a64 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -18,8 +18,9 @@
 #include <linux/selinux.h>
 #include <linux/atomic.h>
 #include <linux/uidgid.h>
+#include <linux/sched.h>
+#include <linux/sched/user.h>
 
-struct user_struct;
 struct cred;
 struct inode;
 
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 591b6c16f9c1..d2e38dc6172c 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -11,6 +11,7 @@
 #include <linux/rcupdate.h>
 #include <linux/lockref.h>
 #include <linux/stringhash.h>
+#include <linux/wait.h>
 
 struct path;
 struct vfsmount;
diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h
index 00e60f79a9cc..4178d2493547 100644
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -18,8 +18,6 @@
 #define _LINUX_DELAYACCT_H
 
 #include <uapi/linux/taskstats.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
 
 /*
  * Per-task flags relevant to delay accounting
@@ -30,7 +28,43 @@
 #define DELAYACCT_PF_BLKIO	0x00000002	/* I am waiting on IO */
 
 #ifdef CONFIG_TASK_DELAY_ACCT
+struct task_delay_info {
+	spinlock_t	lock;
+	unsigned int	flags;	/* Private per-task flags */
+
+	/* For each stat XXX, add following, aligned appropriately
+	 *
+	 * struct timespec XXX_start, XXX_end;
+	 * u64 XXX_delay;
+	 * u32 XXX_count;
+	 *
+	 * Atomicity of updates to XXX_delay, XXX_count protected by
+	 * single lock above (split into XXX_lock if contention is an issue).
+	 */
+
+	/*
+	 * XXX_count is incremented on every XXX operation, the delay
+	 * associated with the operation is added to XXX_delay.
+	 * XXX_delay contains the accumulated delay time in nanoseconds.
+	 */
+	u64 blkio_start;	/* Shared by blkio, swapin */
+	u64 blkio_delay;	/* wait for sync block io completion */
+	u64 swapin_delay;	/* wait for swapin block io completion */
+	u32 blkio_count;	/* total count of the number of sync block */
+				/* io operations performed */
+	u32 swapin_count;	/* total count of the number of swapin block */
+				/* io operations performed */
+
+	u64 freepages_start;
+	u64 freepages_delay;	/* wait for memory reclaim */
+	u32 freepages_count;	/* total count of memory reclaim */
+};
+#endif
 
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#ifdef CONFIG_TASK_DELAY_ACCT
 extern int delayacct_on;	/* Delay accounting turned on/off */
 extern struct kmem_cache *delayacct_cache;
 extern void delayacct_init(void);
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index e9bc9292bd3a..e8ffba1052d3 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -26,7 +26,7 @@
 #include <linux/msi.h>
 #include <linux/irqreturn.h>
 #include <linux/rwsem.h>
-#include <linux/rcupdate.h>
+#include <linux/rculist.h>
 
 struct acpi_dmar_header;
 
diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
index 698d51a0eea3..c8240a12c42d 100644
--- a/include/linux/elfcore.h
+++ b/include/linux/elfcore.h
@@ -3,6 +3,8 @@
 
 #include <linux/user.h>
 #include <linux/bug.h>
+#include <linux/sched/task_stack.h>
+
 #include <asm/elf.h>
 #include <uapi/linux/elfcore.h>
 
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 9f4956d8601c..728d4e0292aa 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -61,6 +61,8 @@ static inline struct dentry *fault_create_debugfs_attr(const char *name,
 
 #endif /* CONFIG_FAULT_INJECTION */
 
+struct kmem_cache;
+
 #ifdef CONFIG_FAILSLAB
 extern bool should_failslab(struct kmem_cache *s, gfp_t gfpflags);
 #else
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index e52b427223ba..249e579ecd4c 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -19,7 +19,6 @@
 #include <linux/ktime.h>
 #include <linux/init.h>
 #include <linux/list.h>
-#include <linux/wait.h>
 #include <linux/percpu.h>
 #include <linux/timer.h>
 #include <linux/timerqueue.h>
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index bed8fbb45f31..6b183521c616 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -30,6 +30,7 @@
 #include <linux/device.h>	/* for struct device */
 #include <linux/sched.h>	/* for completion */
 #include <linux/mutex.h>
+#include <linux/rtmutex.h>
 #include <linux/irqdomain.h>		/* for Host Notify IRQ */
 #include <linux/of.h>		/* for struct device_node */
 #include <linux/swab.h>		/* for swab16 */
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 3a85d61f7614..91d9049f0039 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -12,8 +12,10 @@
 #include <linux/securebits.h>
 #include <linux/seqlock.h>
 #include <linux/rbtree.h>
+#include <linux/sched/autogroup.h>
 #include <net/net_namespace.h>
 #include <linux/sched/rt.h>
+#include <linux/mm_types.h>
 
 #include <asm/thread_info.h>
 
@@ -149,8 +151,6 @@ extern struct group_info init_groups;
 
 extern struct cred init_cred;
 
-extern struct task_group root_task_group;
-
 #ifdef CONFIG_CGROUP_SCHED
 # define INIT_CGROUP_SCHED(tsk)						\
 	.sched_task_group = &root_task_group,
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index c908b25bf5a5..ceb3fe78a0d3 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -1,7 +1,6 @@
 #ifndef _LINUX_KASAN_H
 #define _LINUX_KASAN_H
 
-#include <linux/sched.h>
 #include <linux/types.h>
 
 struct kmem_cache;
@@ -30,16 +29,10 @@ static inline void *kasan_mem_to_shadow(const void *addr)
 }
 
 /* Enable reporting bugs after kasan_disable_current() */
-static inline void kasan_enable_current(void)
-{
-	current->kasan_depth++;
-}
+extern void kasan_enable_current(void);
 
 /* Disable reporting bugs for current task */
-static inline void kasan_disable_current(void)
-{
-	current->kasan_depth--;
-}
+extern void kasan_disable_current(void);
 
 void kasan_unpoison_shadow(const void *address, size_t size);
 
diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h
index 1e032a1ddb3e..5d9a400af509 100644
--- a/include/linux/khugepaged.h
+++ b/include/linux/khugepaged.h
@@ -1,7 +1,8 @@
 #ifndef _LINUX_KHUGEPAGED_H
 #define _LINUX_KHUGEPAGED_H
 
-#include <linux/sched.h> /* MMF_VM_HUGEPAGE */
+#include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */
+
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 extern struct attribute_group khugepaged_attr_group;
diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 481c8c4627ca..e1cfda4bee58 100644
--- a/include/lin