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Message-ID: <20080623153056.1862c14e@linux360.ro>
Date: Mon, 23 Jun 2008 15:30:56 +0300
From: Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
To: tzanussi@...il.com
Cc: penberg@...helsinki.fi, akpm@...ux-foundation.org,
torvalds@...ux-foundation.org, compudj@...stal.dyndns.org,
vegard.nossum@...il.com, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] Full conversion to early_initcall() interface, remove
old interface.
A previous patch added the early_initcall(), to allow a cleaner hooking of
pre-SMP initcalls. Now we remove the older interface, converting all
existing users to the new one.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
---
include/linux/sched.h | 9 ---------
init/main.c | 22 +---------------------
kernel/sched.c | 6 +++++-
kernel/softirq.c | 4 +++-
kernel/softlockup.c | 27 ++++++++++++++++++++++++---
5 files changed, 33 insertions(+), 35 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index c5d3f84..efd8877 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -291,7 +291,6 @@ extern void sched_show_task(struct task_struct *p);
#ifdef CONFIG_DETECT_SOFTLOCKUP
extern void softlockup_tick(void);
-extern void spawn_softlockup_task(void);
extern void touch_softlockup_watchdog(void);
extern void touch_all_softlockup_watchdogs(void);
extern unsigned long softlockup_thresh;
@@ -2200,14 +2199,6 @@ static inline void inc_syscw(struct task_struct *tsk)
}
#endif
-#ifdef CONFIG_SMP
-void migration_init(void);
-#else
-static inline void migration_init(void)
-{
-}
-#endif
-
#ifndef TASK_SIZE_OF
#define TASK_SIZE_OF(tsk) TASK_SIZE
#endif
diff --git a/init/main.c b/init/main.c
index c5397f6..057f364 100644
--- a/init/main.c
+++ b/init/main.c
@@ -766,16 +766,7 @@ static void __init do_basic_setup(void)
do_initcalls();
}
-static int __initdata nosoftlockup;
-
-static int __init nosoftlockup_setup(char *str)
-{
- nosoftlockup = 1;
- return 1;
-}
-__setup("nosoftlockup", nosoftlockup_setup);
-
-static void __init __do_pre_smp_initcalls(void)
+static void __init do_pre_smp_initcalls(void)
{
initcall_t *call;
@@ -783,16 +774,6 @@ static void __init __do_pre_smp_initcalls(void)
do_one_initcall(*call);
}
-static void __init do_pre_smp_initcalls(void)
-{
- extern int spawn_ksoftirqd(void);
-
- migration_init();
- spawn_ksoftirqd();
- if (!nosoftlockup)
- spawn_softlockup_task();
-}
-
static void run_init_process(char *init_filename)
{
argv_init[0] = init_filename;
@@ -864,7 +845,6 @@ static int __init kernel_init(void * unused)
smp_prepare_cpus(setup_max_cpus);
- __do_pre_smp_initcalls();
do_pre_smp_initcalls();
smp_init();
diff --git a/kernel/sched.c b/kernel/sched.c
index b048ad8..ccddfdd 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6175,7 +6175,7 @@ static struct notifier_block __cpuinitdata migration_notifier = {
.priority = 10
};
-void __init migration_init(void)
+static int __init migration_init(void)
{
void *cpu = (void *)(long)smp_processor_id();
int err;
@@ -6185,7 +6185,11 @@ void __init migration_init(void)
BUG_ON(err == NOTIFY_BAD);
migration_call(&migration_notifier, CPU_ONLINE, cpu);
register_cpu_notifier(&migration_notifier);
+
+ return err;
}
+
+early_initcall(migration_init);
#endif
#ifdef CONFIG_SMP
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 36e0617..2ef08c7 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -659,7 +659,7 @@ static struct notifier_block __cpuinitdata cpu_nfb = {
.notifier_call = cpu_callback
};
-__init int spawn_ksoftirqd(void)
+static __init int spawn_ksoftirqd(void)
{
void *cpu = (void *)(long)smp_processor_id();
int err = cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
@@ -670,6 +670,8 @@ __init int spawn_ksoftirqd(void)
return 0;
}
+early_initcall(spawn_ksoftirqd);
+
#ifdef CONFIG_SMP
/*
* Call a function on all processors
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index c828c23..1653802 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -306,14 +306,35 @@ static struct notifier_block __cpuinitdata cpu_nfb = {
.notifier_call = cpu_callback
};
-__init void spawn_softlockup_task(void)
+static int __initdata nosoftlockup;
+
+static int __init nosoftlockup_setup(char *str)
+{
+ nosoftlockup = 1;
+ return 1;
+}
+__setup("nosoftlockup", nosoftlockup_setup);
+
+static int __init spawn_softlockup_task(void)
{
void *cpu = (void *)(long)smp_processor_id();
- int err = cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
+ int err;
+
+ if (nosoftlockup)
+ return 0;
- BUG_ON(err == NOTIFY_BAD);
+ err = cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
+ if (err == NOTIFY_BAD) {
+ BUG();
+ return 1;
+ }
cpu_callback(&cpu_nfb, CPU_ONLINE, cpu);
register_cpu_notifier(&cpu_nfb);
atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
+
+ return 0;
}
+
+early_initcall(spawn_softlockup_task);
+
--
1.5.5.4
--
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