The patch titled
notifiers: cpu: move cpu notifiers into cpu.h
has been added to the -mm tree. Its filename is
notifiers-cpu-move-cpu-notifiers-into-cpuh.patch
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------------------------------------------------------
Subject: notifiers: cpu: move cpu notifiers into cpu.h
From: Amerigo Wang <amwang@xxxxxxxxxx>
We presently define all kinds of notifiers in notifier.h. This is not
necessary at all, since different subsystems use different notifiers, they
are almost non-related with each other.
This can also save much build time. Suppose I add a new netdevice event,
really I don't have to recompile all the source, just network related.
Without this patch, all the source will be recompiled.
I move the notify events near to their subsystem notifier registers, so
that they can be found more easily.
This patch:
It is not necessary to share the same notifier.h.
Signed-off-by: WANG Cong <amwang@xxxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/cpu.h | 33 +++++++++++++++++++++++++++++++++
include/linux/notifier.h | 34 ++--------------------------------
net/rds/page.c | 1 +
3 files changed, 36 insertions(+), 32 deletions(-)
diff -puN include/linux/cpu.h~notifiers-cpu-move-cpu-notifiers-into-cpuh include/linux/cpu.h
--- a/include/linux/cpu.h~notifiers-cpu-move-cpu-notifiers-into-cpuh
+++ a/include/linux/cpu.h
@@ -70,6 +70,39 @@ enum {
CPU_PRI_WORKQUEUE = 5,
};
+#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */
+#define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */
+#define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */
+#define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */
+#define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */
+#define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */
+#define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task,
+ * not handling interrupts, soon dead.
+ * Called on the dying cpu, interrupts
+ * are already disabled. Must not
+ * sleep, must not fail */
+#define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug
+ * lock is dropped */
+#define CPU_STARTING 0x000A /* CPU (unsigned)v soon running.
+ * Called on the new cpu, just before
+ * enabling interrupts. Must not sleep,
+ * must not fail */
+
+/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
+ * operation in progress
+ */
+#define CPU_TASKS_FROZEN 0x0010
+
+#define CPU_ONLINE_FROZEN (CPU_ONLINE | CPU_TASKS_FROZEN)
+#define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE | CPU_TASKS_FROZEN)
+#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED | CPU_TASKS_FROZEN)
+#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
+#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
+#define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN)
+#define CPU_DYING_FROZEN (CPU_DYING | CPU_TASKS_FROZEN)
+#define CPU_STARTING_FROZEN (CPU_STARTING | CPU_TASKS_FROZEN)
+
+
#ifdef CONFIG_SMP
/* Need to know about CPUs going up/down? */
#if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE)
diff -puN include/linux/notifier.h~notifiers-cpu-move-cpu-notifiers-into-cpuh include/linux/notifier.h
--- a/include/linux/notifier.h~notifiers-cpu-move-cpu-notifiers-into-cpuh
+++ a/include/linux/notifier.h
@@ -185,6 +185,8 @@ static inline int notifier_to_errno(int
* VC switch chains (for loadable kernel svgalib VC switch helpers) etc...
*/
+/* CPU notfiers are defined in include/linux/cpu.h. */
+
/* netdevice notifier chain. Please remember to update the rtnetlink
* notification exclusion list in rtnetlink_event() when adding new
* types.
@@ -220,38 +222,6 @@ static inline int notifier_to_errno(int
#define NETLINK_URELEASE 0x0001 /* Unicast netlink socket released */
-#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */
-#define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */
-#define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */
-#define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */
-#define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */
-#define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */
-#define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task,
- * not handling interrupts, soon dead.
- * Called on the dying cpu, interrupts
- * are already disabled. Must not
- * sleep, must not fail */
-#define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug
- * lock is dropped */
-#define CPU_STARTING 0x000A /* CPU (unsigned)v soon running.
- * Called on the new cpu, just before
- * enabling interrupts. Must not sleep,
- * must not fail */
-
-/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
- * operation in progress
- */
-#define CPU_TASKS_FROZEN 0x0010
-
-#define CPU_ONLINE_FROZEN (CPU_ONLINE | CPU_TASKS_FROZEN)
-#define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE | CPU_TASKS_FROZEN)
-#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED | CPU_TASKS_FROZEN)
-#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
-#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
-#define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN)
-#define CPU_DYING_FROZEN (CPU_DYING | CPU_TASKS_FROZEN)
-#define CPU_STARTING_FROZEN (CPU_STARTING | CPU_TASKS_FROZEN)
-
/* Hibernation and suspend events */
#define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */
#define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */
diff -puN net/rds/page.c~notifiers-cpu-move-cpu-notifiers-into-cpuh net/rds/page.c
--- a/net/rds/page.c~notifiers-cpu-move-cpu-notifiers-into-cpuh
+++ a/net/rds/page.c
@@ -32,6 +32,7 @@
*/
#include <linux/highmem.h>
#include <linux/gfp.h>
+#include <linux/cpu.h>
#include "rds.h"
_
Patches currently in -mm which might be from amwang@xxxxxxxxxx are
linux-next.patch
notifiers-cpu-move-cpu-notifiers-into-cpuh.patch
notifiers-net-move-netdevice-notifiers-into-netdeviceh.patch
notifiers-sys-move-reboot-notifiers-into-rebooth.patch
notifiers-pm-move-pm-notifiers-into-suspendh.patch
notifiers-vt-move-vt-notifiers-into-vth.patch
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