[PATCH 23/89] sched/headers, softlockup: Move softlockup detector watchdog methods to <linux/nmi.h>

[Ingo Molnar <mingo@kernel.org>]

These methods don't belong into <linux/sched.h>, they are neither directly
related to task_struct or are scheduler functionality.

Put them next to the other watchdog methods in <linux/nmi.h>.

( Arguably that header's name is a misnomer, and this patch makes it
  more so - but it should be renamed in another patch. )

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>
---
 arch/ia64/kernel/time.c               |  1 +
 arch/ia64/kernel/uncached.c           |  1 +
 arch/powerpc/kernel/swsusp_64.c       |  1 +
 arch/x86/kernel/pvclock.c             |  2 ++
 arch/x86/xen/smp.c                    |  1 +
 drivers/ide/ide-taskfile.c            |  1 +
 drivers/mtd/nand/nand_base.c          |  1 +
 drivers/video/fbdev/nvidia/nv_accel.c |  2 ++
 include/linux/nmi.h                   | 37 +++++++++++++++++++++++++++++++++++++
 include/linux/sched.h                 | 37 -------------------------------------
 init/main.c                           |  1 +
 kernel/debug/debug_core.c             |  1 +
 kernel/power/hibernate.c              |  1 +
 kernel/power/snapshot.c               |  1 +
 kernel/sched/clock.c                  |  1 +
 kernel/time/tick-sched.c              |  1 +
 kernel/time/timekeeping.c             |  1 +
 17 files changed, 54 insertions(+), 37 deletions(-)

diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index faa116822c4c..144f9db7a876 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -16,6 +16,7 @@
 #include <linux/profile.h>
 #include <linux/sched.h>
 #include <linux/time.h>
+#include <linux/nmi.h>
 #include <linux/interrupt.h>
 #include <linux/efi.h>
 #include <linux/timex.h>
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index f3976da36721..583f7ff6b589 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -19,6 +19,7 @@
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/efi.h>
+#include <linux/nmi.h>
 #include <linux/genalloc.h>
 #include <linux/gfp.h>
 #include <asm/page.h>
diff --git a/arch/powerpc/kernel/swsusp_64.c b/arch/powerpc/kernel/swsusp_64.c
index 0e899e47c325..51db012808f5 100644
--- a/arch/powerpc/kernel/swsusp_64.c
+++ b/arch/powerpc/kernel/swsusp_64.c
@@ -10,6 +10,7 @@
 #include <linux/irq.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
+#include <linux/nmi.h>
 
 void do_after_copyback(void)
 {
diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c
index 9e93fe5803b4..5c3f6d6a5078 100644
--- a/arch/x86/kernel/pvclock.c
+++ b/arch/x86/kernel/pvclock.c
@@ -21,6 +21,8 @@
 #include <linux/sched.h>
 #include <linux/gfp.h>
 #include <linux/bootmem.h>
+#include <linux/nmi.h>
+
 #include <asm/fixmap.h>
 #include <asm/pvclock.h>
 
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 311acad7dad2..c876963b92eb 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -18,6 +18,7 @@
 #include <linux/smp.h>
 #include <linux/irq_work.h>
 #include <linux/tick.h>
+#include <linux/nmi.h>
 
 #include <asm/paravirt.h>
 #include <asm/desc.h>
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index a716693417a3..399c98128d48 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -19,6 +19,7 @@
 #include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
+#include <linux/nmi.h>
 #include <linux/scatterlist.h>
 #include <linux/uaccess.h>
 
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index ec1c28aaaf23..5f5db185e24c 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -36,6 +36,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
+#include <linux/nmi.h>
 #include <linux/types.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
diff --git a/drivers/video/fbdev/nvidia/nv_accel.c b/drivers/video/fbdev/nvidia/nv_accel.c
index ad6472a894ea..7341fed63e35 100644
--- a/drivers/video/fbdev/nvidia/nv_accel.c
+++ b/drivers/video/fbdev/nvidia/nv_accel.c
@@ -48,6 +48,8 @@
  */
 
 #include <linux/fb.h>
+#include <linux/nmi.h>
+
 #include "nv_type.h"
 #include "nv_proto.h"
 #include "nv_dma.h"
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 0a3fadc32693..aa3cd0878270 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -7,6 +7,43 @@
 #include <linux/sched.h>
 #include <asm/irq.h>
 
+#ifdef CONFIG_LOCKUP_DETECTOR
+extern void touch_softlockup_watchdog_sched(void);
+extern void touch_softlockup_watchdog(void);
+extern void touch_softlockup_watchdog_sync(void);
+extern void touch_all_softlockup_watchdogs(void);
+extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
+				  void __user *buffer,
+				  size_t *lenp, loff_t *ppos);
+extern unsigned int  softlockup_panic;
+extern unsigned int  hardlockup_panic;
+void lockup_detector_init(void);
+#else
+static inline void touch_softlockup_watchdog_sched(void)
+{
+}
+static inline void touch_softlockup_watchdog(void)
+{
+}
+static inline void touch_softlockup_watchdog_sync(void)
+{
+}
+static inline void touch_all_softlockup_watchdogs(void)
+{
+}
+static inline void lockup_detector_init(void)
+{
+}
+#endif
+
+#ifdef CONFIG_DETECT_HUNG_TASK
+void reset_hung_task_detector(void);
+#else
+static inline void reset_hung_task_detector(void)
+{
+}
+#endif
+
 /*
  * The run state of the lockup detectors is controlled by the content of the
  * 'watchdog_enabled' variable. Each lockup detector has its dedicated bit -
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f8cbe401181c..121f2df0711a 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -290,43 +290,6 @@ extern int sched_cpu_dying(unsigned int cpu);
 
 extern void sched_show_task(struct task_struct *p);
 
-#ifdef CONFIG_LOCKUP_DETECTOR
-extern void touch_softlockup_watchdog_sched(void);
-extern void touch_softlockup_watchdog(void);
-extern void touch_softlockup_watchdog_sync(void);
-extern void touch_all_softlockup_watchdogs(void);
-extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
-				  void __user *buffer,
-				  size_t *lenp, loff_t *ppos);
-extern unsigned int  softlockup_panic;
-extern unsigned int  hardlockup_panic;
-void lockup_detector_init(void);
-#else
-static inline void touch_softlockup_watchdog_sched(void)
-{
-}
-static inline void touch_softlockup_watchdog(void)
-{
-}
-static inline void touch_softlockup_watchdog_sync(void)
-{
-}
-static inline void touch_all_softlockup_watchdogs(void)
-{
-}
-static inline void lockup_detector_init(void)
-{
-}
-#endif
-
-#ifdef CONFIG_DETECT_HUNG_TASK
-void reset_hung_task_detector(void);
-#else
-static inline void reset_hung_task_detector(void)
-{
-}
-#endif
-
 /* Attach to any functions which should be ignored in wchan output. */
 #define __sched		__attribute__((__section__(".sched.text")))
 
diff --git a/init/main.c b/init/main.c
index 19228149386c..148ce7162486 100644
--- a/init/main.c
+++ b/init/main.c
@@ -26,6 +26,7 @@
 #include <linux/bootmem.h>
 #include <linux/acpi.h>
 #include <linux/tty.h>
+#include <linux/nmi.h>
 #include <linux/percpu.h>
 #include <linux/kmod.h>
 #include <linux/vmalloc.h>
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 79517e5549f1..356157373dd2 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -49,6 +49,7 @@
 #include <linux/init.h>
 #include <linux/kgdb.h>
 #include <linux/kdb.h>
+#include <linux/nmi.h>
 #include <linux/pid.h>
 #include <linux/smp.h>
 #include <linux/mm.h>
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index b26dbc48c75b..75d44afc5758 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -21,6 +21,7 @@
 #include <linux/fs.h>
 #include <linux/mount.h>
 #include <linux/pm.h>
+#include <linux/nmi.h>
 #include <linux/console.h>
 #include <linux/cpu.h>
 #include <linux/freezer.h>
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 2d8e2b227db8..31ea16353207 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -22,6 +22,7 @@
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/nmi.h>
 #include <linux/syscalls.h>
 #include <linux/console.h>
 #include <linux/highmem.h>
diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c
index dd7817cdbf58..a08795e21628 100644
--- a/kernel/sched/clock.c
+++ b/kernel/sched/clock.c
@@ -58,6 +58,7 @@
 #include <linux/percpu.h>
 #include <linux/ktime.h>
 #include <linux/sched.h>
+#include <linux/nmi.h>
 #include <linux/sched/clock.h>
 #include <linux/static_key.h>
 #include <linux/workqueue.h>
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 71bf056e782e..449257037ff1 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -17,6 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 #include <linux/percpu.h>
+#include <linux/nmi.h>
 #include <linux/profile.h>
 #include <linux/sched/signal.h>
 #include <linux/sched/clock.h>
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index fb564acee0f3..5b63a2102c29 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -14,6 +14,7 @@
 #include <linux/percpu.h>
 #include <linux/init.h>
 #include <linux/mm.h>
+#include <linux/nmi.h>
 #include <linux/sched.h>
 #include <linux/sched/loadavg.h>
 #include <linux/syscore_ops.h>
-- 
2.7.4