[RFC,PATCH 3/4] Change synchronize_kernel to _rcu and _sched
From: Paul E. McKenney
Date: Sun Apr 03 2005 - 01:32:41 EST
This patch changes calls to synchronize_kernel(), deprecated in the
earlier "Deprecate synchronize_kernel, GPL replacement" patch to
instead call the new synchronize_rcu() and synchronize_sched() APIs.
Signed-off-by: <paulmck@xxxxxxxxxx>
---
arch/i386/oprofile/nmi_timer_int.c | 2 +-
arch/ppc64/kernel/HvLpEvent.c | 2 +-
arch/x86_64/kernel/mce.c | 2 +-
drivers/acpi/processor_idle.c | 2 +-
drivers/char/ipmi/ipmi_si_intf.c | 4 ++--
drivers/input/keyboard/atkbd.c | 2 +-
drivers/md/multipath.c | 2 +-
drivers/md/raid1.c | 2 +-
drivers/md/raid10.c | 2 +-
drivers/md/raid5.c | 2 +-
drivers/md/raid6main.c | 2 +-
drivers/net/r8169.c | 2 +-
drivers/s390/cio/airq.c | 4 ++--
kernel/module.c | 2 +-
kernel/profile.c | 2 +-
mm/slab.c | 2 +-
net/core/dev.c | 2 +-
17 files changed, 19 insertions(+), 19 deletions(-)
diff -urpN -X dontdiff linux-2.6.12-rc1/arch/i386/oprofile/nmi_timer_int.c linux-2.6.12-rc1-bettersk/arch/i386/oprofile/nmi_timer_int.c
--- linux-2.6.12-rc1/arch/i386/oprofile/nmi_timer_int.c Tue Mar 1 23:37:52 2005
+++ linux-2.6.12-rc1-bettersk/arch/i386/oprofile/nmi_timer_int.c Fri Apr 1 21:03:57 2005
@@ -36,7 +36,7 @@ static void timer_stop(void)
{
enable_timer_nmi_watchdog();
unset_nmi_callback();
- synchronize_kernel();
+ synchronize_sched(); /* Allow already-started NMIs to complete. */
}
diff -urpN -X dontdiff linux-2.6.12-rc1/arch/ppc64/kernel/HvLpEvent.c linux-2.6.12-rc1-bettersk/arch/ppc64/kernel/HvLpEvent.c
--- linux-2.6.12-rc1/arch/ppc64/kernel/HvLpEvent.c Tue Mar 1 23:38:09 2005
+++ linux-2.6.12-rc1-bettersk/arch/ppc64/kernel/HvLpEvent.c Fri Apr 1 20:54:40 2005
@@ -45,7 +45,7 @@ int HvLpEvent_unregisterHandler( HvLpEve
/* We now sleep until all other CPUs have scheduled. This ensures that
* the deletion is seen by all other CPUs, and that the deleted handler
* isn't still running on another CPU when we return. */
- synchronize_kernel();
+ synchronize_rcu();
}
}
return rc;
diff -urpN -X dontdiff linux-2.6.12-rc1/arch/x86_64/kernel/mce.c linux-2.6.12-rc1-bettersk/arch/x86_64/kernel/mce.c
--- linux-2.6.12-rc1/arch/x86_64/kernel/mce.c Tue Mar 1 23:37:52 2005
+++ linux-2.6.12-rc1-bettersk/arch/x86_64/kernel/mce.c Fri Apr 1 21:03:01 2005
@@ -392,7 +392,7 @@ static ssize_t mce_read(struct file *fil
memset(mcelog.entry, 0, next * sizeof(struct mce));
mcelog.next = 0;
- synchronize_kernel();
+ synchronize_sched(); /* Allow all already-started MCEs to complete. */
/* Collect entries that were still getting written before the synchronize. */
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/acpi/processor_idle.c linux-2.6.12-rc1-bettersk/drivers/acpi/processor_idle.c
--- linux-2.6.12-rc1/drivers/acpi/processor_idle.c Tue Mar 1 23:38:25 2005
+++ linux-2.6.12-rc1-bettersk/drivers/acpi/processor_idle.c Sat Apr 2 10:57:37 2005
@@ -838,7 +838,7 @@ int acpi_processor_cst_has_changed (stru
/* Fall back to the default idle loop */
pm_idle = pm_idle_save;
- synchronize_kernel();
+ synchronize_sched(); /* Relies on interrupts forcing exit from idle. */
pr->flags.power = 0;
result = acpi_processor_get_power_info(pr);
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/char/ipmi/ipmi_si_intf.c linux-2.6.12-rc1-bettersk/drivers/char/ipmi/ipmi_si_intf.c
--- linux-2.6.12-rc1/drivers/char/ipmi/ipmi_si_intf.c Thu Mar 31 09:53:02 2005
+++ linux-2.6.12-rc1-bettersk/drivers/char/ipmi/ipmi_si_intf.c Fri Apr 1 20:44:59 2005
@@ -2194,7 +2194,7 @@ static int init_one_smi(int intf_num, st
/* Wait until we know that we are out of any interrupt
handlers might have been running before we freed the
interrupt. */
- synchronize_kernel();
+ synchronize_sched();
if (new_smi->si_sm) {
if (new_smi->handlers)
@@ -2307,7 +2307,7 @@ static void __exit cleanup_one_si(struct
/* Wait until we know that we are out of any interrupt
handlers might have been running before we freed the
interrupt. */
- synchronize_kernel();
+ synchronize_sched();
/* Wait for the timer to stop. This avoids problems with race
conditions removing the timer here. */
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/input/keyboard/atkbd.c linux-2.6.12-rc1-bettersk/drivers/input/keyboard/atkbd.c
--- linux-2.6.12-rc1/drivers/input/keyboard/atkbd.c Thu Mar 31 09:53:04 2005
+++ linux-2.6.12-rc1-bettersk/drivers/input/keyboard/atkbd.c Fri Apr 1 21:18:07 2005
@@ -678,7 +678,7 @@ static void atkbd_disconnect(struct seri
atkbd_disable(atkbd);
/* make sure we don't have a command in flight */
- synchronize_kernel();
+ synchronize_sched(); /* Allow atkbd_interrupt()s to complete. */
flush_scheduled_work();
device_remove_file(&serio->dev, &atkbd_attr_extra);
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/md/multipath.c linux-2.6.12-rc1-bettersk/drivers/md/multipath.c
--- linux-2.6.12-rc1/drivers/md/multipath.c Tue Mar 1 23:38:08 2005
+++ linux-2.6.12-rc1-bettersk/drivers/md/multipath.c Fri Apr 1 21:20:08 2005
@@ -355,7 +355,7 @@ static int multipath_remove_disk(mddev_t
goto abort;
}
p->rdev = NULL;
- synchronize_kernel();
+ synchronize_rcu();
if (atomic_read(&rdev->nr_pending)) {
/* lost the race, try later */
err = -EBUSY;
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/md/raid1.c linux-2.6.12-rc1-bettersk/drivers/md/raid1.c
--- linux-2.6.12-rc1/drivers/md/raid1.c Thu Mar 31 09:53:05 2005
+++ linux-2.6.12-rc1-bettersk/drivers/md/raid1.c Fri Apr 1 21:20:50 2005
@@ -797,7 +797,7 @@ static int raid1_remove_disk(mddev_t *md
goto abort;
}
p->rdev = NULL;
- synchronize_kernel();
+ synchronize_rcu();
if (atomic_read(&rdev->nr_pending)) {
/* lost the race, try later */
err = -EBUSY;
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/md/raid10.c linux-2.6.12-rc1-bettersk/drivers/md/raid10.c
--- linux-2.6.12-rc1/drivers/md/raid10.c Tue Mar 1 23:38:38 2005
+++ linux-2.6.12-rc1-bettersk/drivers/md/raid10.c Fri Apr 1 21:21:24 2005
@@ -977,7 +977,7 @@ static int raid10_remove_disk(mddev_t *m
goto abort;
}
p->rdev = NULL;
- synchronize_kernel();
+ synchronize_rcu();
if (atomic_read(&rdev->nr_pending)) {
/* lost the race, try later */
err = -EBUSY;
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/md/raid5.c linux-2.6.12-rc1-bettersk/drivers/md/raid5.c
--- linux-2.6.12-rc1/drivers/md/raid5.c Thu Mar 31 09:53:05 2005
+++ linux-2.6.12-rc1-bettersk/drivers/md/raid5.c Fri Apr 1 21:28:06 2005
@@ -1873,7 +1873,7 @@ static int raid5_remove_disk(mddev_t *md
goto abort;
}
p->rdev = NULL;
- synchronize_kernel();
+ synchronize_rcu();
if (atomic_read(&rdev->nr_pending)) {
/* lost the race, try later */
err = -EBUSY;
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/md/raid6main.c linux-2.6.12-rc1-bettersk/drivers/md/raid6main.c
--- linux-2.6.12-rc1/drivers/md/raid6main.c Thu Mar 31 09:53:05 2005
+++ linux-2.6.12-rc1-bettersk/drivers/md/raid6main.c Fri Apr 1 21:29:19 2005
@@ -2038,7 +2038,7 @@ static int raid6_remove_disk(mddev_t *md
goto abort;
}
p->rdev = NULL;
- synchronize_kernel();
+ synchronize_rcu();
if (atomic_read(&rdev->nr_pending)) {
/* lost the race, try later */
err = -EBUSY;
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/net/r8169.c linux-2.6.12-rc1-bettersk/drivers/net/r8169.c
--- linux-2.6.12-rc1/drivers/net/r8169.c Thu Mar 31 09:53:08 2005
+++ linux-2.6.12-rc1-bettersk/drivers/net/r8169.c Fri Apr 1 21:41:38 2005
@@ -2385,7 +2385,7 @@ core_down:
}
/* Give a racing hard_start_xmit a few cycles to complete. */
- synchronize_kernel();
+ synchronize_sched(); /* FIXME: should this be synchronize_irq()? */
/*
* And now for the 50k$ question: are IRQ disabled or not ?
diff -urpN -X dontdiff linux-2.6.12-rc1/drivers/s390/cio/airq.c linux-2.6.12-rc1-bettersk/drivers/s390/cio/airq.c
--- linux-2.6.12-rc1/drivers/s390/cio/airq.c Tue Mar 1 23:38:17 2005
+++ linux-2.6.12-rc1-bettersk/drivers/s390/cio/airq.c Fri Apr 1 21:44:18 2005
@@ -45,7 +45,7 @@ s390_register_adapter_interrupt (adapter
else
ret = (cmpxchg(&adapter_handler, NULL, handler) ? -EBUSY : 0);
if (!ret)
- synchronize_kernel();
+ synchronize_sched(); /* Allow interrupts to complete. */
sprintf (dbf_txt, "ret:%d", ret);
CIO_TRACE_EVENT (4, dbf_txt);
@@ -65,7 +65,7 @@ s390_unregister_adapter_interrupt (adapt
ret = -EINVAL;
else {
adapter_handler = NULL;
- synchronize_kernel();
+ synchronize_sched(); /* Allow interrupts to complete. */
ret = 0;
}
sprintf (dbf_txt, "ret:%d", ret);
diff -urpN -X dontdiff linux-2.6.12-rc1/kernel/module.c linux-2.6.12-rc1-bettersk/kernel/module.c
--- linux-2.6.12-rc1/kernel/module.c Thu Mar 31 09:53:21 2005
+++ linux-2.6.12-rc1-bettersk/kernel/module.c Sat Apr 2 10:58:02 2005
@@ -1801,7 +1801,7 @@ sys_init_module(void __user *umod,
/* Init routine failed: abort. Try to protect us from
buggy refcounters. */
mod->state = MODULE_STATE_GOING;
- synchronize_kernel();
+ synchronize_sched();
if (mod->unsafe)
printk(KERN_ERR "%s: module is now stuck!\n",
mod->name);
diff -urpN -X dontdiff linux-2.6.12-rc1/kernel/profile.c linux-2.6.12-rc1-bettersk/kernel/profile.c
--- linux-2.6.12-rc1/kernel/profile.c Tue Mar 1 23:38:26 2005
+++ linux-2.6.12-rc1-bettersk/kernel/profile.c Fri Apr 1 21:46:10 2005
@@ -184,7 +184,7 @@ void unregister_timer_hook(int (*hook)(s
WARN_ON(hook != timer_hook);
timer_hook = NULL;
/* make sure all CPUs see the NULL hook */
- synchronize_kernel();
+ synchronize_sched(); /* Allow ongoing interrupts to complete. */
}
EXPORT_SYMBOL_GPL(register_timer_hook);
diff -urpN -X dontdiff linux-2.6.12-rc1/mm/slab.c linux-2.6.12-rc1-bettersk/mm/slab.c
--- linux-2.6.12-rc1/mm/slab.c Thu Mar 31 09:53:22 2005
+++ linux-2.6.12-rc1-bettersk/mm/slab.c Fri Apr 1 21:50:57 2005
@@ -1656,7 +1656,7 @@ int kmem_cache_destroy (kmem_cache_t * c
}
if (unlikely(cachep->flags & SLAB_DESTROY_BY_RCU))
- synchronize_kernel();
+ synchronize_rcu();
/* no cpu_online check required here since we clear the percpu
* array on cpu offline and set this to NULL.
diff -urpN -X dontdiff linux-2.6.12-rc1/net/core/dev.c linux-2.6.12-rc1-bettersk/net/core/dev.c
--- linux-2.6.12-rc1/net/core/dev.c Thu Mar 31 09:53:22 2005
+++ linux-2.6.12-rc1-bettersk/net/core/dev.c Fri Apr 1 22:25:26 2005
@@ -3077,7 +3077,7 @@ void free_netdev(struct net_device *dev)
void synchronize_net(void)
{
might_sleep();
- synchronize_kernel();
+ synchronize_rcu();
}
/**
-
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