notifiers: sys: move reboot notifiers into reboot.h

It is not necessary to share the same notifier.h.

This patch already moves register_reboot_notifier() and
unregister_reboot_notifier() from kernel/notifier.c to kernel/sys.c.

[amwang@redhat.com: make allyesconfig succeed on ppc64]
Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: David Miller <davem@davemloft.net>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 39 insertions, 36 deletions

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 271ff63..0e0ea94 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -24,6 +24,7 @@
 #include <linux/cpumask.h>
 #include <linux/memblock.h>
 #include <linux/slab.h>
+#include <linux/reboot.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index bf5f5ce..e037c74 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
+#include <linux/reboot.h>
 #include <asm/delay.h>
 #include <asm/uaccess.h>
 #include <asm/rtas.h>
diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index e8a858a..145c436 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -189,10 +189,7 @@ static inline int notifier_to_errno(int ret)
 
 /* netdevice notifiers are defined in include/linux/netdevice.h */
 
-#define SYS_DOWN	0x0001	/* Notify of system down */
-#define SYS_RESTART	SYS_DOWN
-#define SYS_HALT	0x0002	/* Notify of system halt */
-#define SYS_POWER_OFF	0x0003	/* Notify of system power off */
+/* reboot notifiers are defined in include/linux/reboot.h. */
 
 #define NETLINK_URELEASE	0x0001	/* Unicast netlink socket released */
 
diff --git a/include/linux/reboot.h b/include/linux/reboot.h
index 3005d5a..e0879a7 100644
--- a/include/linux/reboot.h
+++ b/include/linux/reboot.h
@@ -39,6 +39,11 @@
 
 #include <linux/notifier.h>
 
+#define SYS_DOWN	0x0001	/* Notify of system down */
+#define SYS_RESTART	SYS_DOWN
+#define SYS_HALT	0x0002	/* Notify of system halt */
+#define SYS_POWER_OFF	0x0003	/* Notify of system power off */
+
 extern int register_reboot_notifier(struct notifier_block *);
 extern int unregister_reboot_notifier(struct notifier_block *);
 
diff --git a/kernel/notifier.c b/kernel/notifier.c
index 2488ba7..8d7b435 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -525,37 +525,6 @@ void srcu_init_notifier_head(struct srcu_notifier_head *nh)
 }
 EXPORT_SYMBOL_GPL(srcu_init_notifier_head);
 
-/**
- *	register_reboot_notifier - Register function to be called at reboot time
- *	@nb: Info about notifier function to be called
- *
- *	Registers a function with the list of functions
- *	to be called at reboot time.
- *
- *	Currently always returns zero, as blocking_notifier_chain_register()
- *	always returns zero.
- */
-int register_reboot_notifier(struct notifier_block *nb)
-{
-	return blocking_notifier_chain_register(&reboot_notifier_list, nb);
-}
-EXPORT_SYMBOL(register_reboot_notifier);
-
-/**
- *	unregister_reboot_notifier - Unregister previously registered reboot notifier
- *	@nb: Hook to be unregistered
- *
- *	Unregisters a previously registered reboot
- *	notifier function.
- *
- *	Returns zero on success, or %-ENOENT on failure.
- */
-int unregister_reboot_notifier(struct notifier_block *nb)
-{
-	return blocking_notifier_chain_unregister(&reboot_notifier_list, nb);
-}
-EXPORT_SYMBOL(unregister_reboot_notifier);
-
 static ATOMIC_NOTIFIER_HEAD(die_chain);
 
 int notrace __kprobes notify_die(enum die_val val, const char *str,
diff --git a/kernel/sys.c b/kernel/sys.c
index e4128b2..a101ba3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -8,7 +8,6 @@
 #include <linux/mm.h>
 #include <linux/utsname.h>
 #include <linux/mman.h>
-#include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/prctl.h>
 #include <linux/highuid.h>
@@ -320,6 +319,37 @@ void kernel_restart_prepare(char *cmd)
 }
 
 /**
+ *	register_reboot_notifier - Register function to be called at reboot time
+ *	@nb: Info about notifier function to be called
+ *
+ *	Registers a function with the list of functions
+ *	to be called at reboot time.
+ *
+ *	Currently always returns zero, as blocking_notifier_chain_register()
+ *	always returns zero.
+ */
+int register_reboot_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&reboot_notifier_list, nb);
+}
+EXPORT_SYMBOL(register_reboot_notifier);
+
+/**
+ *	unregister_reboot_notifier - Unregister previously registered reboot notifier
+ *	@nb: Hook to be unregistered
+ *
+ *	Unregisters a previously registered reboot
+ *	notifier function.
+ *
+ *	Returns zero on success, or %-ENOENT on failure.
+ */
+int unregister_reboot_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_unregister(&reboot_notifier_list, nb);
+}
+EXPORT_SYMBOL(unregister_reboot_notifier);
+
+/**
  *	kernel_restart - reboot the system
  *	@cmd: pointer to buffer containing command to execute for restart
  *		or %NULL