commit 9c7b216d23e820e0e148d5be01bbb5bd2d8378fe
author Chandra Seetharaman <sekharan@us.ibm.com> Tue Jun 27 02:54:07 2006 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Tue Jun 27 17:32:40 2006 -0700
tree 53e6c1e4870db49b4999b4053862d3f63375773f
parent 6ac12dfe9c2027cd3c5ed603f11d1bb4f04906fe

[PATCH] cpu hotplug: revert init patch submitted for 2.6.17

In 2.6.17, there was a problem with cpu_notifiers and XFS.  I provided a
band-aid solution to solve that problem.  In the process, i undid all the
changes you both were making to ensure that these notifiers were available
only at init time (unless CONFIG_HOTPLUG_CPU is defined).

We deferred the real fix to 2.6.18.  Here is a set of patches that fixes the
XFS problem cleanly and makes the cpu notifiers available only at init time
(unless CONFIG_HOTPLUG_CPU is defined).

If CONFIG_HOTPLUG_CPU is defined then cpu notifiers are available at run
time.

This patch reverts the notifier_call changes made in 2.6.17

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/hrtimer.c

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 55601b3..f9f5319 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -833,7 +833,7 @@
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int hrtimer_cpu_notify(struct notifier_block *self,
+static int __devinit hrtimer_cpu_notify(struct notifier_block *self,
 					unsigned long action, void *hcpu)
 {
 	long cpu = (long)hcpu;

kernel/profile.c

diff --git a/kernel/profile.c b/kernel/profile.c
index 68afe12..5a730fd 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -299,7 +299,7 @@
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static int profile_cpu_callback(struct notifier_block *info,
+static int __devinit profile_cpu_callback(struct notifier_block *info,
 					unsigned long action, void *__cpu)
 {
 	int node, cpu = (unsigned long)__cpu;

kernel/rcupdate.c

diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index c0e1cb9..a8d80b7 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -548,7 +548,7 @@
 	tasklet_init(&per_cpu(rcu_tasklet, cpu), rcu_process_callbacks, 0UL);
 }
 
-static int rcu_cpu_notify(struct notifier_block *self,
+static int __devinit rcu_cpu_notify(struct notifier_block *self,
 				unsigned long action, void *hcpu)
 {
 	long cpu = (long)hcpu;

kernel/softirq.c

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 9e2f1c6..db65a31 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -446,7 +446,7 @@
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int cpu_callback(struct notifier_block *nfb,
+static int __devinit cpu_callback(struct notifier_block *nfb,
 				  unsigned long action,
 				  void *hcpu)
 {

kernel/softlockup.c

diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index b5c3b94..29da0a8 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -104,7 +104,7 @@
 /*
  * Create/destroy watchdog threads as CPUs come and go:
  */
-static int
+static int __devinit
 cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
 {
 	int hotcpu = (unsigned long)hcpu;

kernel/timer.c

diff --git a/kernel/timer.c b/kernel/timer.c
index 5bb6b79..878194e 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1652,7 +1652,7 @@
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int timer_cpu_notify(struct notifier_block *self,
+static int __devinit timer_cpu_notify(struct notifier_block *self,
 				unsigned long action, void *hcpu)
 {
 	long cpu = (long)hcpu;

kernel/workqueue.c

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 565cf7a..59f0b42 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -559,7 +559,7 @@
 }
 
 /* We're holding the cpucontrol mutex here */
-static int workqueue_cpu_callback(struct notifier_block *nfb,
+static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
 				  unsigned long action,
 				  void *hcpu)
 {