sched/headers: Prepare to move kstack_end() from <linux/sched.h> to <linux/sched/task_stack.h>

But first update the usage sites with the new header dependency.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/m32r/kernel/traps.c

@@ -15,7 +15,9 @@
 #include <linux/stddef.h>
 #include <linux/ptrace.h>
 #include <linux/sched/debug.h>
+#include <linux/sched/task_stack.h>
 #include <linux/mm.h>
+
 #include <asm/page.h>
 #include <asm/processor.h>
 

arch/metag/kernel/stacktrace.c

 #include <linux/export.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
+#include <linux/sched/task_stack.h>
 #include <linux/stacktrace.h>
 
 #include <asm/stacktrace.h>

arch/openrisc/kernel/traps.c

@@ -23,6 +23,7 @@
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
+#include <linux/sched/task_stack.h>
 #include <linux/kernel.h>
 #include <linux/extable.h>
 #include <linux/kmod.h>

arch/um/kernel/sysrq.c

@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
+#include <linux/sched/task_stack.h>
 
 #include <asm/sysrq.h>
 #include <asm/stacktrace.h>

arch/xtensa/kernel/traps.c

@@ -26,6 +26,7 @@
 #include <linux/kernel.h>
 #include <linux/sched/signal.h>
 #include <linux/sched/debug.h>
+#include <linux/sched/task_stack.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/stringify.h>

mm/slab.c

@@ -116,6 +116,7 @@
 #include	<linux/kmemcheck.h>
 #include	<linux/memory.h>
 #include	<linux/prefetch.h>
+#include	<linux/sched/task_stack.h>
 
 #include	<net/sock.h>